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WO2015045170A1 - Appareil de conversion de puissance pour matériel roulant électrique, et procédé de commande d'appareil de conversion de puissance - Google Patents

Appareil de conversion de puissance pour matériel roulant électrique, et procédé de commande d'appareil de conversion de puissance Download PDF

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Publication number
WO2015045170A1
WO2015045170A1 PCT/JP2013/076592 JP2013076592W WO2015045170A1 WO 2015045170 A1 WO2015045170 A1 WO 2015045170A1 JP 2013076592 W JP2013076592 W JP 2013076592W WO 2015045170 A1 WO2015045170 A1 WO 2015045170A1
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WIPO (PCT)
Prior art keywords
electric motor
abnormality detection
electric
acceleration
abnormality
Prior art date
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Ceased
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PCT/JP2013/076592
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English (en)
Japanese (ja)
Inventor
太一 吉田
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Priority to JP2015538812A priority Critical patent/JP6058150B2/ja
Priority to PCT/JP2013/076592 priority patent/WO2015045170A1/fr
Publication of WO2015045170A1 publication Critical patent/WO2015045170A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/46—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
    • H02P5/50—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another by comparing electrical values representing the speeds
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/10—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors for preventing overspeed or under speed

Definitions

  • the present invention relates to a power converter for an electric vehicle and a control method for the power converter.
  • a power converter that drives an electric motor like a power converter used in an electric railway vehicle (hereinafter referred to as an electric vehicle), converts the input electric power and outputs electric power for driving the electric motor.
  • the power converter outputs power based on the operation command and the angular velocity of the motor detected by the speed sensor so that the torque of the motor becomes a desired value.
  • the speed generator with pulse generator disconnection detection disclosed in Patent Document 1 is in a state where the output signal of the pulse generator indicating the angular speed of the electric motor cannot be detected, and the current reference or torque reference is almost the limit value. Detects the disconnection of the pulse generator when is continued for a certain time.
  • the speed control device with pulse generator disconnection detection disclosed in Patent Document 1 is a pulse generator within a certain period of time when the power cable and signal line of the pulse generator are not completely disconnected but an abnormality has occurred. If the output signal is detected again, it is impossible to detect an abnormality of the pulse generator. Further, even when the output signal of the pulse generator decreases instantaneously due to the abnormality of the pulse generator, the abnormality of the pulse generator cannot be detected.
  • the present invention has been made in view of the above circumstances, and an object thereof is to improve the detection accuracy of an abnormality in a speed sensor of an electric motor.
  • an electric vehicle power conversion device is an electric vehicle power conversion device that converts input power and outputs electric power for driving an electric motor.
  • a calculation unit and an abnormality detection unit are provided.
  • the speed calculation unit calculates the angular speed of the electric motor based on a signal acquired from a speed sensor that outputs a signal corresponding to the rotation of the electric motor.
  • the acceleration calculation unit calculates the angular acceleration of the electric motor.
  • the abnormality detection unit detects that an abnormality has occurred in the speed sensor when the number of times that the value based on the angular acceleration of the motor exceeds a predetermined range within a predetermined time is equal to or greater than a threshold value.
  • the present invention when the number of times that the value based on the angular acceleration of the electric motor exceeds the determined range within a predetermined time is greater than or equal to the threshold, by detecting that an abnormality has occurred in the speed sensor, It becomes possible to improve the detection accuracy of abnormality in the speed sensor of the electric motor.
  • FIG. 3 is a block diagram illustrating a configuration example of an abnormality detection unit according to Embodiment 1.
  • FIG. 3 is a time chart illustrating an example of abnormality detection in the abnormality detection unit according to the first embodiment.
  • 3 is a flowchart illustrating an example of a control operation of the power conversion device according to the first embodiment.
  • 6 is a block diagram illustrating a configuration example of an acceleration difference calculation unit according to Embodiment 2.
  • FIG. 6 is a block diagram illustrating a configuration example of an abnormality detection unit according to Embodiment 2.
  • FIG. 6 is a flowchart illustrating an example of a control operation of the power conversion device according to the second embodiment. It is a block diagram which shows the structural example of the power converter device which concerns on Embodiment 3 of this invention.
  • 10 is a block diagram illustrating a configuration example of an abnormality detection unit according to Embodiment 3.
  • FIG. It is a block diagram which shows the structural example of the abnormality detection part which concerns on Embodiment 4 of this invention.
  • FIG. 10 is a block diagram illustrating a different configuration example of an abnormality detection unit according to the fourth embodiment.
  • FIG. 10 is a block diagram illustrating a configuration example of a power conversion device according to a fourth embodiment.
  • FIG. 10 is a block diagram illustrating a different configuration example of an abnormality detection unit according to the fourth embodiment.
  • FIG. 1 is a block diagram showing a configuration example of a power conversion device according to Embodiment 1 of the present invention.
  • the power converter 1 is provided in an electric vehicle and outputs electric power to an electric motor 11 that drives wheels.
  • the power conversion device 1 includes a power converter 2 that converts and outputs input power, a speed calculation unit 3 that calculates an angular velocity of the electric motor 11, an acceleration calculation unit 4 that calculates angular acceleration of the electric motor 11, and an angle of the electric motor 11.
  • An absolute value calculation unit 5 that calculates the absolute value of the acceleration, an abnormality detection unit 6 that detects an abnormality of the motor 11 based on the absolute value of the angular acceleration of the motor 11, and the power converter 2 when an abnormality of the motor 11 is detected.
  • the stop part 7 which stops is provided.
  • one end of the input terminal of the power converter 2 is connected to an overhead line via a current collector such as a pantograph, and the other end is grounded.
  • the power converter 2 is controlled by a power converter control unit (not shown), converts input power, and outputs power for driving the motor 11.
  • the power converter control unit controls the power converter 2 based on operation commands such as a power running command and a brake command and the angular velocity of the electric motor 11 calculated by the speed calculation unit 3.
  • the power converter 2 can drive an arbitrary number of electric motors 11. In the first embodiment, power converter 2 drives one electric motor 11.
  • the electric motor 11 is not limited to an AC electric motor such as an induction motor, and an arbitrary electric motor can be used as the electric motor 11.
  • PG Pulse Generator 12 which is a kind of speed sensor is attached to the rotating shaft of the electric motor 11.
  • the PG 12 outputs a pulse signal according to the rotation speed of the electric motor 11.
  • the PG 12 generates several tens to several hundreds of pulses each time the rotation shaft of the electric motor 11 rotates once.
  • a portion surrounded by a dotted line is the sensor abnormality detection unit 10, and each unit of the sensor abnormality detection unit 10 cooperates to detect an abnormality of the PG 12.
  • the speed calculation unit 3 detects the number of pulses per unit time based on the pulse signal output from the PG 12, calculates the angular velocity of the electric motor 11, and sends it to the acceleration calculation unit 4. Based on the angular velocity of the electric motor 11, the acceleration calculating unit 4 detects a change in the angular velocity at a predetermined time, calculates the angular acceleration of the electric motor 11, and sends it to the absolute value calculating unit 5. The predetermined length of time for detecting the change in angular velocity can be arbitrarily determined.
  • the absolute value calculation unit 5 calculates the absolute value of the angular acceleration of the electric motor 11 and sends it to the abnormality detection unit 6.
  • the abnormality detection unit 6 detects that an abnormality has occurred in the PG 12 when the number of times that the value based on the angular acceleration of the electric motor 11 exceeds a predetermined range within a predetermined time is equal to or greater than a threshold value.
  • the predetermined length of time for detecting the abnormality of PG 12 can be arbitrarily determined.
  • the abnormality detection unit 6 has the number of times that the absolute value of the angular acceleration of the electric motor 11 is equal to or greater than the first threshold within the determined time is equal to or greater than the second threshold. In this case, it is detected that an abnormality has occurred in PG12.
  • the abnormality in the PG 12 includes an abnormality in the power cable connected to the PG 12 in addition to the abnormality in the PG 12 itself.
  • the abnormality detection unit 6 When the abnormality detection unit 6 detects that an abnormality has occurred in the PG 12, the abnormality detection unit 6 notifies the stop unit 7 to that effect. For example, when the abnormality detection unit 6 detects that an abnormality has occurred in the PG 12, the abnormality detection unit 6 sends an abnormality detection signal that is at the H level for a certain time to the stop unit 7. When detecting that the abnormality detection signal is at the H level, the stopping unit 7 outputs a stop signal to the power converter 2 and stops the power converter 2.
  • the operation when the abnormality detection signal becomes H level is not limited to the stop of the power converter 2.
  • the power converter control unit controls the power converter 2 based on the operation command, the angular velocity of the motor 11 estimated based on the current supplied to the motor 11, and the like. May be.
  • FIG. 2 is a block diagram illustrating a configuration example of the abnormality detection unit according to the first embodiment.
  • the abnormality detection unit 6 includes a comparator 61 and a count circuit 62.
  • the comparator 61 determines whether or not the absolute value of the angular acceleration of the electric motor 11 output from the absolute value calculator 5 is equal to or greater than the first threshold value, and the absolute value of the angular acceleration of the electric motor 11 is the first threshold value. In the above case, a signal at H level is output.
  • the first threshold value can be arbitrarily determined. While the PG 12 is operating normally, the angular velocity of the electric motor 11 changes continuously.
  • the count circuit 62 detects the rising edge of the output signal of the comparator 61, determines whether or not the number of rising edges detected within a predetermined time is equal to or greater than the second threshold, and the number of times the rising edge is detected is the first. An abnormality detection signal that becomes H level when the threshold value of 2 is exceeded is output. That is, the count circuit 62 outputs an abnormality detection signal that becomes H level when the number of times that the absolute value of the angular acceleration of the electric motor 11 is equal to or greater than the first threshold is equal to or greater than the second threshold.
  • the second threshold value can be arbitrarily determined.
  • an abnormality detection unit at the time of idling or sliding of the wheel is not detected because the abnormality of the PG 12 is not immediately detected based on an instantaneous change in the acceleration of the electric motor 11 due to idling or running of the wheel. 6 can be prevented from being erroneously detected.
  • FIG. 3 is a time chart showing an example of abnormality detection in the abnormality detection unit according to the first embodiment.
  • the horizontal axis is time.
  • Each interval between times T1, T2, T3, T4, and T5 is time T seconds.
  • the PG 12 outputs a pulse signal including N pulses from time T1 to time T2, and outputs a pulse signal including N / a pulses from time T2 to time T3 and from time T3 to time T4. From time T4 to time T5, a pulse signal including N pulses is output.
  • the speed calculation unit 3 measures the number of pulses per unit time T seconds included in the pulse signal, and calculates the angular speed of the electric motor 11. Since the angular velocity of the electric motor 11 is proportional to N / T, if the proportionality constant is b, the angular velocity of the electric motor 11 calculated based on the output of the PG 12 from time T1 to time T2 is bN / T. The value of b is determined by the characteristics of PG12. Similarly, the angular velocity of the electric motor 11 calculated based on the output of the PG 12 from time T4 to time T5 is bN / T. It is assumed that PG 12 outputs N pulses during T seconds immediately before time T1.
  • the angular velocity of the electric motor 11 calculated based on the output of the PG 12 from the time T2 to the time T3 and from the time T3 to the time T4 is bN / aT. Therefore, the output of the speed calculation unit 3 is bN / T from time T1 to time T3, bN / aT from time T3 to time T5, and bN / T after time T5.
  • the acceleration calculation unit 4 calculates the angular acceleration of the electric motor 11 for a predetermined time t seconds.
  • the value of t can be determined arbitrarily.
  • the acceleration calculation unit 4 performs an operation of subtracting the angular velocity of the electric motor 11 at a time t seconds before a certain time from the angular velocity of the electric motor 11 at a certain time, divides the calculation result by t, and the angular acceleration of the electric motor 11 Is calculated.
  • the angular acceleration of the electric motor 11 at time T3 is (1 / a-1) ⁇ bN / Tt.
  • the angular acceleration of the electric motor 11 at time T5 is (1-1 / a) ⁇ bN / Tt.
  • the abnormality detection unit 6 determines whether or not the number of times that the absolute value of the angular velocity of the electric motor 11 output by the absolute value calculation unit 5 is equal to or greater than the first threshold within a predetermined time is equal to or greater than the second threshold. To do.
  • the first threshold value is indicated by a one-dot chain line.
  • of the angular velocity of the electric motor 11 at time T3 and time T5 is larger than the first threshold value. If the time determined here is 4T seconds and the second threshold is 2, the abnormality detection unit 6 outputs an abnormality detection signal that becomes H level at time T5. When detecting that the abnormality detection signal is at the H level, the stopping unit 7 outputs a stop signal to the power converter 2 and stops the power converter 2.
  • FIG. 4 is a flowchart illustrating an example of a control operation of the power conversion device according to the first embodiment.
  • the speed calculation unit 3 calculates the angular speed of the electric motor 11 based on the pulse signal output from the PG 12 (step S110).
  • the acceleration calculation unit 4 calculates the angular acceleration of the electric motor 11 based on the angular velocity of the electric motor 11 (step S120).
  • the abnormality detection unit 6 determines whether or not an abnormality has occurred in the PG 12 based on whether or not the number of times that the absolute value of the angular acceleration of the electric motor 11 exceeds the predetermined range within a predetermined time is greater than or equal to a threshold value. (Step S130).
  • step S140 When the abnormality detection unit 6 detects that an abnormality has occurred in the PG 12 (step S140; Y), the stop unit 7 stops the power converter 2 (step S150). When the stop process in step S150 is completed, the power conversion apparatus 1 ends the process.
  • the power converter control unit uses the operation command and the angular velocity of the motor 11 calculated by the speed calculation unit 3 to The converter 2 is controlled, and the power converter 2 continues to operate (step S160). And it returns to step S110 and performs the above-mentioned process repeatedly.
  • the abnormality detection unit 6 includes a comparator 61 and a count circuit 62 according to the number of inputs, and the stop unit 7 has any abnormality detection signal at the H level. In some cases, the power converter 2 is stopped.
  • the absolute value calculation unit 5 is provided. However, the absolute value calculation unit 5 is not provided, and the abnormality detection unit 6 is within a range in which the angular acceleration of the electric motor 11 is determined. It may be judged.
  • the determined range can be arbitrarily determined. For example, a sufficiently wide range is set as compared with a range of values that can be taken by the angular acceleration of the electric motor 11 when the PG 12 is operating normally.
  • the absolute value calculation unit 5 is provided as described above, the abnormality detection unit 6 is input to one comparator 61 regardless of whether the angular acceleration of the electric motor 11 is a positive value or a negative value. What is necessary is just to compare a value and a 1st threshold value, and the structure of the abnormality detection part 6 becomes simple.
  • the power conversion device 1 According to the power conversion device 1 according to the first embodiment, it is possible to improve the detection accuracy of the abnormality in the speed sensor of the electric motor.
  • FIG. 5 is a block diagram illustrating a configuration example of the power conversion device according to the second embodiment of the present invention.
  • the power conversion device 1 according to the second embodiment drives the motors 11a and 11b.
  • the number of motors is an arbitrary value of 2 or more.
  • PG12a and 12b are attached to the rotation shafts of the electric motors 11a and 11b, respectively.
  • the power conversion device 1 according to the second embodiment has at least one of the PGs 12a and 12b when the number of times the variation in angular acceleration of the electric motors 11a and 11b exceeds a predetermined range within a predetermined time is equal to or greater than a threshold value. Detect that crab abnormality is occurring.
  • the difference between the absolute values of the angular accelerations of the electric motors 11a and 11b and the minimum absolute value of the angular accelerations of the electric motors 11a and 11b is used as a value indicating the variation in acceleration.
  • the speed calculation unit 3a calculates the angular velocity of the electric motor 11a based on the pulse signal output from the PG 12a and sends it to the acceleration calculation unit 4a.
  • the speed calculation unit 3b calculates the angular velocity of the electric motor 11b based on the pulse signal output from the PG 12b, and sends it to the acceleration calculation unit 4b.
  • the acceleration calculation unit 4 a calculates the angular acceleration of the electric motor 11 a based on the angular velocity of the electric motor 11 a and sends it to the absolute value calculation unit 5.
  • the acceleration calculation unit 4 b calculates the angular acceleration of the electric motor 11 b based on the angular velocity of the electric motor 11 b and sends it to the absolute value calculation unit 5.
  • the absolute value calculation unit 5 calculates the absolute value of the input and outputs it. That is, the absolute value calculation unit 5 calculates the absolute value of the angular acceleration of the electric motor 11 a and the absolute value of the angular acceleration of the electric motor 11 b, and sends them to the acceleration difference calculation unit 8.
  • the acceleration difference calculation unit 8 calculates the difference between the absolute value of each angular acceleration of the electric motors 11 a and 11 b and the minimum value of the absolute value of the angular acceleration of the electric motors 11 a and 11 b, and sends the difference to the abnormality detection unit 6.
  • the abnormality detection unit 6 includes the PG 12a and 12b. Detect that an abnormality has occurred in at least one of them.
  • the determined range can be arbitrarily determined, for example, a range in which a sufficiently wide range is set compared to a range of values that can be taken by variations in angular acceleration of the motors 11a and 11b when the PGs 12a and 12b are operating normally.
  • the abnormality detection unit 6 detects that an abnormality has occurred in each of the PGs 12a and 12b, the abnormality detection unit 6 sends an abnormality detection signal that is at the H level for a certain period of time to the stop unit 7, respectively.
  • the stopping unit 7 When detecting that any one of the abnormality detection signals is at the H level, the stopping unit 7 outputs a stop signal to the power converter 2 and stops the power converter 2.
  • FIG. 6 is a block diagram illustrating a configuration example of the acceleration difference calculation unit according to the second embodiment.
  • the acceleration difference calculation unit 8 includes a minimum value calculation unit 81.
  • the absolute value of the angular acceleration of the electric motor 11a output from the absolute value calculation unit 5 is ADV1
  • the absolute value of the angular acceleration of the electric motor 11b is ADV2.
  • the minimum value calculator 81 detects and outputs the minimum values of ADV1 and ADV2.
  • the acceleration difference calculation unit 8 sends the difference DDV1 between ADV1 and the minimum value and the difference DDV2 between ADV2 and the minimum value to the abnormality detection unit 6, respectively.
  • FIG. 7 is a block diagram illustrating a configuration example of the abnormality detection unit according to the second embodiment.
  • the abnormality detection unit 6 includes a number of comparators and count circuits according to the input.
  • the abnormality detection unit 6 includes comparators 63a and 63b and count circuits 62a and 62b.
  • the comparator 63a determines whether or not DDV1 is equal to or greater than the third threshold value, and outputs a signal that is at the H level when DDV1 is equal to or greater than the third threshold value.
  • the third threshold value can be arbitrarily determined. Similar to the first threshold value, the third threshold value is set to a sufficiently large value as compared with the variation in the magnitude of the acceleration of the electric motors 11a and 11b when the PGs 12a and 12b are operating normally. It is possible to prevent erroneous detection in the abnormality detection unit 6.
  • the count circuit 62a detects the rise of the output signal of the comparator 63a, determines whether or not the number of rises detected within a predetermined time is equal to or greater than a second threshold, and the number of times the rise is detected is the first. An abnormality detection signal that becomes H level when the threshold value of 2 is exceeded is output. That is, the count circuit 62a outputs an abnormality detection signal that becomes H level when the number of times that the DDV1 becomes equal to or greater than the third threshold becomes equal to or greater than the second threshold. Similar to the first embodiment, the second threshold value can be arbitrarily determined.
  • the comparator 63b determines whether DDV2 is equal to or greater than the third threshold value, and outputs a signal that is at the H level when DDV2 is equal to or greater than the third threshold value.
  • the count circuit 62b detects the rise of the output signal of the comparator 63b, determines whether or not the number of rises detected within a predetermined time is equal to or greater than a second threshold, and the number of times the rise is detected is the first.
  • An abnormality detection signal that becomes H level when the threshold value of 2 is exceeded is output. That is, the count circuit 62b outputs an abnormality detection signal that becomes H level when the number of times that the DDV2 becomes equal to or greater than the third threshold becomes equal to or greater than the second threshold.
  • the abnormality detection unit 6 detects an abnormality of the PGs 12a and 12b based on variations in angular acceleration of the electric motors 11a and 11b, an abnormality of the PGs 12a and 12b is erroneously detected based on a change in acceleration that may occur during normal power running or braking. Detection can be prevented.
  • the structure of the acceleration difference calculating part 8 and the abnormality detection part 6 is not restricted to the above-mentioned structure.
  • the acceleration difference calculation unit 8 outputs a difference between the maximum value and the minimum value of the input, and the abnormality detection unit 6 determines whether or not the number of times that the output of the acceleration difference calculation unit 8 exceeds a predetermined range is equal to or greater than a threshold value. Based on this, an abnormality detection signal may be output.
  • FIG. 8 is a flowchart illustrating an example of a control operation of the power conversion device according to the second embodiment.
  • the processing in steps S110 and S120 is the same as the control operation performed by the power conversion device 1 according to the first embodiment shown in FIG.
  • the acceleration difference calculation unit 8 calculates the difference between the absolute value of the angular acceleration of each of the electric motors 11a and 11b and the minimum value of the absolute value of the angular acceleration of the electric motors 11a and 11b (step S121).
  • the abnormality detection unit 6 determines whether or not the number of times that any value exceeds a predetermined range among the calculation results of the acceleration difference calculation unit 8 within a predetermined time is greater than or equal to a threshold value. It is determined whether or not an abnormality has occurred in at least one of them (step S131).
  • the processes in steps S140, S150, and S160 are the same as the control operation performed by the power conversion device 1 according to the first embodiment shown in FIG.
  • the power conversion device 1 according to the second embodiment it is possible to improve the detection accuracy of the abnormality in the speed sensor of the electric motor.
  • FIG. 9 is a block diagram illustrating a configuration example of the power conversion device according to the third embodiment of the present invention.
  • the power conversion device 1 according to the third embodiment drives the motors 11a and 11b.
  • the number of motors is an arbitrary value of 2 or more.
  • the power conversion device 1 according to the third embodiment includes an average value calculation unit 9 instead of the acceleration difference calculation unit 8 included in the power conversion device 1 according to the second embodiment.
  • Other configurations are the same as those of the second embodiment.
  • the power conversion device 1 performs abnormality detection of the PGs 12a and 12b when the average value of the angular velocities of the electric motors 11a and 11b is within a predetermined range.
  • the determined range can be arbitrarily determined. For example, a range that is sufficiently wider than the range of values that can be taken by the average value of the angular velocity of the electric motor 11 when the PGs 12a and 12b are operating normally is set as a range that is determined. .
  • the operation of power conversion device 1 according to the third embodiment which is different from the first and second embodiments, will be described.
  • the average value calculation unit 9 calculates the average value of the angular velocities of the electric motors 11 a and 11 b and sends it to the abnormality detection unit 6.
  • the abnormality detection unit 6 is a case where the average value of the angular velocities of the electric motors 11a and 11b is within a predetermined range, and the absolute value of the angular acceleration of at least one of the electric motors 11a and 11b is the first value within the predetermined time.
  • the number of times equal to or greater than the second threshold is equal to or greater than the second threshold, it is detected that an abnormality has occurred in at least one of the PGs 12a and 12b.
  • FIG. 10 is a block diagram illustrating a configuration example of the abnormality detection unit according to the third embodiment.
  • the abnormality detection unit 6 includes a number of comparators, count circuits, switches, and NOT circuits according to the input.
  • the abnormality detection unit 6 includes comparators 61a and 61b, count circuits 62a and 62b, switches 64a and 64b, an average value comparator 65, and NOT circuits 66a and 66b.
  • the absolute value of the angular acceleration of the electric motor 11a is ADV1
  • the absolute value of the angular acceleration of the electric motor 11b is ADV2.
  • the comparator 61a determines whether ADV1 is equal to or greater than a first threshold value, and outputs a signal that is at an H level when ADV1 is equal to or greater than the first threshold value.
  • the comparator 61b determines whether ADV2 is equal to or higher than the first threshold value, and outputs a signal at H level when ADV2 is equal to or higher than the first threshold value.
  • the average value comparator 65 determines whether or not the average of the angular velocities of the electric motors 11a and 11b output from the average value calculation unit 9 is equal to or greater than a threshold value, and the average value of the angular velocities of the electric motors 11a and 11b is equal to or greater than the threshold value. Outputs a signal at H level.
  • the switches 64 a and 64 b are switched in connection destination according to the output of the average value comparator 65.
  • the switches 64a and 64b connect the comparators 61a and 61b and the count circuits 62a and 62b, respectively, when the output of the average value comparator 65 is at the H level.
  • the switches 64a and 64b respectively ground one ends of the count circuits 62a and 62b when the output of the average value comparator 65 is L level.
  • the NOT circuits 66a and 66b invert the output of the average value comparator 65 and output it to the count circuits 62a and 62b, respectively.
  • the count circuit 62a detects the rising edge of the input signal via the switch 64a, determines whether or not the number of rising edges detected within a predetermined time is equal to or more than the second threshold, and the number of times the rising edge is detected is determined.
  • An abnormality detection signal that is H level when the second threshold value is exceeded is output. That is, the count circuit 62a is a case where the average value of the angular velocities of the electric motors 11a and 11b is equal to or greater than the threshold value, and the number of times ADV1 is equal to or greater than the first threshold value within the determined time is equal to or greater than the second threshold value. In this case, an abnormality detection signal that becomes H level is output.
  • the count circuit 62a resets the count value when detecting the rising edge of the input signal through the NOT circuit 66a. For example, when the average value of the angular velocities of the electric motors 11a and 11b is changed from a state where the average value of the electric motors 11a and 11b is equal to or greater than the threshold value to a state where the average value is less than the threshold value, the input side of the count circuit 62a is grounded. While the average value of the angular velocities of the electric motors 11a and 11b is less than the threshold value, the abnormality detection process is not performed and the abnormality detection signal does not become the H level. As in the first embodiment, the first threshold value and the second threshold value can be arbitrarily determined.
  • the count circuit 62b detects the rising edge of the input signal via the switch 64b, determines whether or not the number of rising edges detected within the predetermined time is equal to or more than the second threshold, and detects the rising edge.
  • An abnormality detection signal that is at the H level when the number of times of occurrence becomes equal to or greater than the second threshold value is output. That is, the count circuit 62b is a case where the average value of the angular velocities of the electric motors 11a and 11b is equal to or greater than a threshold, and the number of times ADV2 is equal to or greater than the first threshold within a predetermined time is equal to or greater than the second threshold. In this case, an abnormality detection signal that becomes H level is output.
  • the count circuit 62b resets the count value when detecting the rising of the input signal via the NOT circuit 66b. For example, when the average value of the angular velocities of the electric motors 11a and 11b is changed from a state where the average value is equal to or higher than the threshold value to a state where the average value is lower than the threshold value, the input side of the count circuit 62b is grounded and the count value is reset. While the average value of the angular velocities of the electric motors 11a and 11b is less than the threshold value, the abnormality detection process is not performed and the abnormality detection signal does not become the H level.
  • the abnormality of the PGs 12a and 12b is erroneously detected by detecting the abnormality of the PGs 12a and 12b, for example, when the motors 11a and 11b are operating at a low speed. Detection can be prevented.
  • the abnormality detection of the PGs 12a and 12b may be performed when the average value of the angular velocities of the electric motors 11a and 11b is within a certain range or less than a threshold value.
  • the power conversion device 1 according to the third embodiment it is possible to improve the detection accuracy of the abnormality in the speed sensor of the electric motor.
  • the configuration of power conversion device 1 according to Embodiment 4 of the present invention is the same as the configuration of power conversion device 1 according to Embodiment 1 shown in FIG. However, an operation command for the electric vehicle is input to the abnormality detection unit 6.
  • the power conversion device 1 according to Embodiment 4 is a case where a powering command or coasting command is input as an operation command, and the number of times that the angular acceleration of the electric motor 11 exceeds a predetermined range within a predetermined time. If it is equal to or greater than the threshold, it is detected that an abnormality has occurred in PG12.
  • the operation of the power conversion device 1 according to the fourth embodiment which is different from the first to third embodiments, will be described.
  • the abnormality detection unit 6 acquires a driving command in the electric vehicle, and a powering command or a coasting command is input as the driving command, and the absolute value of the angular acceleration of the motor 11 is the first value within a predetermined time.
  • the number of times equal to or greater than the threshold value is equal to or greater than the second threshold value, it is detected that an abnormality has occurred in PG12.
  • FIG. 11 is a block diagram illustrating a configuration example of an abnormality detection unit according to Embodiment 4 of the present invention.
  • the abnormality detection unit 6 includes a comparator 61, a count circuit 62, a switch 64, a NOT circuit 66, and an operation command determination unit 67.
  • the comparator 61 determines whether or not the absolute value of the angular acceleration of the electric motor 11 is equal to or greater than the first threshold value, and the absolute value of the angular acceleration of the electric motor 11 is equal to the first threshold value. In the above case, a signal at H level is output.
  • the operation command determination unit 67 determines whether or not the operation command is a powering command or a coasting command, and outputs a signal that becomes an H level when the operation command is a powering command or a coasting command.
  • the connection destination of the switch 64 is switched according to the output of the operation command determination unit 67. For example, the switch 64 connects the comparator 61 and the count circuit 62 when the output of the operation command determination unit 67 is at the H level. The switch 64 grounds one end of the count circuit 62 when the output of the operation command determination unit 67 is at the L level.
  • the NOT circuit 66 inverts the output of the operation command determination unit 67 and outputs it to the count circuit 62.
  • the count circuit 62 detects the rising edge of the input signal via the switch 64, determines whether or not the number of rising edges detected within a predetermined time is equal to or more than the second threshold, and the number of times the rising edge is detected is determined.
  • An abnormality detection signal that is H level when the second threshold value is exceeded is output. That is, the count circuit 62 is a case where the operation command is a power running command or a coasting command, and the number of times that the absolute value of the angular acceleration of the electric motor 11 is equal to or greater than the first threshold value within a predetermined time is the second threshold value.
  • the count circuit 62 resets the count value when the rising edge of the input signal via the NOT circuit 66 is detected. For example, when the operation command changes from a power running command or coasting command to a brake command, the input side of the count circuit 62 is grounded and the count value is reset. While the operation command is neither a power running command nor a coasting command, the abnormality detection process is not performed and the abnormality detection signal does not become the H level.
  • the first threshold value and the second threshold value can be arbitrarily determined.
  • the abnormality detection of PG 12 is performed to prevent erroneous detection of the abnormality of PG 12 based on, for example, a rapid change in angular acceleration of the electric motor 11 due to gliding during braking. be able to.
  • FIG. 12 is a block diagram illustrating a different configuration example of the abnormality detection unit according to the fourth embodiment.
  • the abnormality detection unit 6 shown in FIG. 12 further includes an operation command determination unit 67 and an OR circuit 68 in addition to the configuration of the abnormality detection unit 6 according to the third embodiment shown in FIG.
  • the switches 64 a and 64 b are switched in connection destination according to the output of the OR circuit 68.
  • the OR circuit 68 outputs a signal that becomes H level when either the output of the average value comparator 65 or the output of the operation command determination unit 67 is H level.
  • the switches 64a and 64b connect the comparators 61a and 61b and the count circuits 62a and 62b, respectively.
  • the switches 64a and 64b respectively ground one ends of the count circuits 62a and 62b when the output of the OR circuit 68 is at the L level.
  • the NOT circuits 66a and 66b invert the output of the OR circuit 68 and output it to the count circuits 62a and 62b, respectively.
  • the abnormality detection unit 6 shown in FIG. 12 performs abnormality detection when the average value of the angular velocities of the electric motors 11a and 11b is within a predetermined range, or when the operation command is a powering command or a coasting command.
  • FIG. 13 is a block diagram illustrating a configuration example of the power conversion device according to the fourth embodiment.
  • the power conversion device 1 shown in FIG. 13 further includes an average value calculation unit 9 in addition to the configuration of the power conversion device according to the second embodiment shown in FIG.
  • FIG. 14 is a block diagram illustrating a different configuration example of the abnormality detection unit according to the fourth embodiment.
  • the power conversion device 1 illustrated in FIG. 13 includes the abnormality detection unit 6 illustrated in FIG.
  • the abnormality detection unit 6 illustrated in FIG. 14 is configured by combining the abnormality detection unit 6 illustrated in FIGS. 7, 10, and 11, and further includes an OR circuit 68.
  • the operation of the OR circuit 68 is the same as that of the abnormality detection unit 6 shown in FIG.
  • the switches 64a and 64b connect the comparators 63a and 63b and the count circuits 62a and 62b, respectively.
  • the switches 64a and 64b respectively ground one ends of the count circuits 62a and 62b when the output of the OR circuit 68 is at the L level.
  • the NOT circuits 66a and 66b invert the output of the OR circuit 68 and output it to the count circuits 62a and 62b, respectively.
  • the average value of the angular velocities of the electric motors 11a and 11b is within a predetermined range, or the operation command is a powering command or a coasting command, and the electric motor is within a predetermined time. If the number of times that the angular acceleration variations of 11a and 11b exceed a predetermined range is equal to or greater than the threshold, it is detected that an abnormality has occurred in at least one of PGs 12a and 12b.
  • the power conversion device 1 according to the fourth embodiment it is possible to improve the detection accuracy of the abnormality in the speed sensor of the electric motor.
  • the embodiment of the present invention is not limited to the above-described embodiment, and may be configured by arbitrarily combining a plurality of the above-described embodiments.
  • the present invention can be suitably employed in a power conversion device that drives an electric motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electric Motors In General (AREA)
  • Control Of Multiple Motors (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

L'invention concerne un procédé dans lequel une unité de calcul de vitesse (3) calcule une vitesse angulaire d'un moteur électrique (11) en fonctions de signaux d'impulsion émis par un générateur d'impulsions (PG) (12), et une unité de calcul d'accélération (4) calcule l'accélération angulaire du moteur électrique (11). Dans les cas où le nombre de fois où la valeur absolue de l'accélération angulaire du moteur électrique (11) est supérieure ou égale à une première valeur seuil est supérieur ou égal à une seconde valeur seuil pendant une durée prédéterminée, ladite valeur absolue ayant été calculée au moyen d'une unité de calcul de valeur absolue (5), une unité de détection d'anomalie (6) détecte qu'une anomalie est générée dans le PG (12). Dans les cas où il est détecté au moyen de l'unité de détection d'anomalie (6) qu'une anomalie a été générée dans le PG (12), une unité d'arrêt (7) arrête le convertisseur de puissance (2).
PCT/JP2013/076592 2013-09-30 2013-09-30 Appareil de conversion de puissance pour matériel roulant électrique, et procédé de commande d'appareil de conversion de puissance Ceased WO2015045170A1 (fr)

Priority Applications (2)

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JP2015538812A JP6058150B2 (ja) 2013-09-30 2013-09-30 電気車の電力変換装置および電力変換装置の制御方法
PCT/JP2013/076592 WO2015045170A1 (fr) 2013-09-30 2013-09-30 Appareil de conversion de puissance pour matériel roulant électrique, et procédé de commande d'appareil de conversion de puissance

Applications Claiming Priority (1)

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PCT/JP2013/076592 WO2015045170A1 (fr) 2013-09-30 2013-09-30 Appareil de conversion de puissance pour matériel roulant électrique, et procédé de commande d'appareil de conversion de puissance

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CN112421996A (zh) * 2020-09-23 2021-02-26 南京信息工程大学 一种适用电动汽车开关磁阻电机转速极端突变的控制方法
CN114826078A (zh) * 2022-05-12 2022-07-29 深圳市欧瑞博科技股份有限公司 电动部件的驱动方法、装置、电动部件及存储介质
CN118962433A (zh) * 2024-10-16 2024-11-15 新驰电气集团有限公司 用于快速隔离开关状态诊断的智能监测方法

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JPH01234082A (ja) * 1988-03-11 1989-09-19 Hitachi Koki Co Ltd 回転数検出回路の異常判別法
JPH03265487A (ja) * 1990-03-13 1991-11-26 Hitachi Ltd 誘導電動機の制御装置
JPH07194186A (ja) * 1993-12-28 1995-07-28 Nippon Steel Corp モータ及びその駆動対象の異常診断装置
JPH0923501A (ja) * 1995-07-03 1997-01-21 Hitachi Ltd 電気車制御装置
JPH10225196A (ja) * 1997-02-04 1998-08-21 Toshiba Corp 誘導電動機の制御装置
JP2001145207A (ja) * 1999-11-16 2001-05-25 Hitachi Ltd 電気車の制御装置
JP2003264901A (ja) * 2002-03-07 2003-09-19 Toshiba Corp 電気車制御装置

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JPS62221891A (ja) * 1986-03-20 1987-09-29 Mitsubishi Electric Corp 過速度故障検出機能付速度検出器
JPH01234082A (ja) * 1988-03-11 1989-09-19 Hitachi Koki Co Ltd 回転数検出回路の異常判別法
JPH03265487A (ja) * 1990-03-13 1991-11-26 Hitachi Ltd 誘導電動機の制御装置
JPH07194186A (ja) * 1993-12-28 1995-07-28 Nippon Steel Corp モータ及びその駆動対象の異常診断装置
JPH0923501A (ja) * 1995-07-03 1997-01-21 Hitachi Ltd 電気車制御装置
JPH10225196A (ja) * 1997-02-04 1998-08-21 Toshiba Corp 誘導電動機の制御装置
JP2001145207A (ja) * 1999-11-16 2001-05-25 Hitachi Ltd 電気車の制御装置
JP2003264901A (ja) * 2002-03-07 2003-09-19 Toshiba Corp 電気車制御装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112421996A (zh) * 2020-09-23 2021-02-26 南京信息工程大学 一种适用电动汽车开关磁阻电机转速极端突变的控制方法
CN114826078A (zh) * 2022-05-12 2022-07-29 深圳市欧瑞博科技股份有限公司 电动部件的驱动方法、装置、电动部件及存储介质
CN118962433A (zh) * 2024-10-16 2024-11-15 新驰电气集团有限公司 用于快速隔离开关状态诊断的智能监测方法

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