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WO2017113458A1 - Système d'alimentation électrique à double entrée pour châssis mtca - Google Patents

Système d'alimentation électrique à double entrée pour châssis mtca Download PDF

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Publication number
WO2017113458A1
WO2017113458A1 PCT/CN2016/072116 CN2016072116W WO2017113458A1 WO 2017113458 A1 WO2017113458 A1 WO 2017113458A1 CN 2016072116 W CN2016072116 W CN 2016072116W WO 2017113458 A1 WO2017113458 A1 WO 2017113458A1
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WIPO (PCT)
Prior art keywords
resistor
nmos transistor
module
power supply
voltage
Prior art date
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Ceased
Application number
PCT/CN2016/072116
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English (en)
Chinese (zh)
Inventor
陈德刚
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Bangyan Technology Co Ltd
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Bangyan Technology Co Ltd
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Filing date
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Publication of WO2017113458A1 publication Critical patent/WO2017113458A1/fr
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/10—Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from AC or DC
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating

Definitions

  • the present invention relates to the field of power circuits, and more particularly to a dual input power system for an MTCA chassis.
  • MTCA is MicroTCA and its architecture is similar to a simplified version of ATCA. It is compatible with ATCA's high performance, high bandwidth, AMC flexibility, creating a very high level of integration, greatly reducing costs, reducing system space and scale, and eliminating the need for carrier board design to facilitate AMC modules. usage of. Therefore, it is well suited for applications in the low-end communications, industrial, military, medical, multimedia and other fields.
  • the power supply in the existing MTCA chassis is mostly AC 220V single input power or DC 48V single input power, which cannot achieve dual power input; general power supply does not support hot swap, which brings inconvenience to users using power supply equipment;
  • the power system is interfered by various external factors, voltage fluctuations occur, resulting in undervoltage or overvoltage conditions, resulting in unstable output of the communication power supply, affecting the normal operation of various power supply equipment.
  • an object of the present invention is to provide a dual input power supply system for an MTCA chassis, which can realize dual power input, is convenient for users, has flexible application, and has good reliability; and the input and output of the power supply are supported. Hot plugging, power board replacement without power off, very convenient; also supports input and output backup, power system stability.
  • the technical solution adopted by the present invention is: a dual input power system for an MTCA chassis, comprising an AC voltage input terminal, a DC voltage input terminal and a voltage output terminal, the dual input power system further comprising a slow start module and a voltage a conversion module and a combined output module, wherein an output end of the slow start module is connected to an input end of the voltage conversion module, an output end of the voltage conversion module is connected to an input end of the combined output module, and an output of the combined output module The terminal is connected to the voltage output of the dual input power system.
  • the combined output module includes a switch control chip, a first switch tube and a second switch tube, and the switch control chip is respectively connected to the first switch tube and the second switch tube and controls their turn-off.
  • first switch tube is a first NMOS tube
  • second switch tube is a second NMOS tube
  • the slow start module includes a DC slow start circuit, and an output end of the DC slow start circuit is connected to an input end of the voltage conversion module, and the DC slow start circuit includes a first resistor, a second resistor, and a third resistor. a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first diode, a first Zener diode, a first capacitor, a second capacitor, a third NMOS transistor, and a fourth NMOS transistor; One end of a resistor is connected to the cathode of the first diode, the other end of the first resistor is connected to the anode of the first diode, and the other end of the first resistor is connected to one end of the second resistor, The other end of the second resistor is connected to the drain of the third NMOS transistor; one end of the second resistor is connected to the cathode of the first Zener diode, and the other end of the first Zener diode is connected to the an
  • the slow start module further includes an AC slow start circuit, and an output end of the AC slow start circuit is connected to an input end of the voltage conversion module.
  • the dual input power supply system for the MTCA chassis further includes a reverse connection protection module, and an output end of the reverse connection protection module is connected to an input end of the DC slow start circuit.
  • the reverse connection protection module is a reverse connection protection circuit
  • the reverse connection protection circuit includes an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a second Zener diode, a third capacitor, and a third a fifth NMOS transistor and a sixth NMOS transistor
  • one end of the eighth resistor is an input end of the reverse connection protection circuit
  • the other end of the eighth resistor is connected to one end of the ninth resistor
  • the other end of the ninth resistor Connected to the gate of the fifth NMOS transistor
  • the source of the fifth NMOS transistor is connected to the source of the sixth NMOS transistor
  • the drain of the sixth NMOS transistor is connected to the drain of the fifth NMOS transistor
  • a gate of the sixth NMOS transistor is connected to one end of the tenth resistor
  • the other end of the tenth resistor is connected to one end of the ninth resistor
  • one end of the eleventh resistor is connected to one end of the ninth resistor, the
  • the dual input power system for the MTCA chassis further includes a filtering module, the filtering module includes a DC filtering module, and the DC voltage input end of the dual input power system is connected to the input end of the DC filtering module.
  • the output end of the DC filter module is connected to the input end of the reverse connection protection module.
  • the filtering module further includes an AC filter module, wherein the AC voltage input end of the dual input power system is connected to the input end of the AC filter module, and the output end of the AC filter module is connected to the input end of the AC slow start circuit. .
  • the dual input power system for the MTCA chassis further includes a heat dissipation module, and an output end of the voltage conversion module is connected to an input end of the heat dissipation module.
  • the invention has the beneficial effects that the invention has two voltage conversion circuits, can realize dual power input, is convenient for users, has flexible application and good reliability; the input and output of the invention both support hot swapping and replace the power board It is very convenient without power off; it also supports input and output backup, and the stability of the power system is good.
  • the invention has a reverse connection protection module, which can realize reverse connection protection to the DC power input; the invention has a filtering module, so that the dual input power system meets the requirements of electromagnetic emission and sensitivity; the invention also adds a heat dissipation module and improves the The stability of the dual input power system.
  • FIG. 1 is a block diagram showing the structure of a dual input power supply system for an MTCA chassis according to the present invention
  • FIG. 2 is a circuit diagram of a specific embodiment of a reverse connection protection module in a dual input power supply system for an MTCA chassis;
  • FIG. 3 is a circuit diagram of a specific embodiment of a DC slow start circuit in a dual input power supply system for an MTCA chassis;
  • FIG. 4 is a waveform diagram of a specific embodiment of a DC slow start circuit in a dual input power supply system for an MTCA chassis;
  • FIG. 5 is a circuit diagram of a specific embodiment of a combined output module in a dual input power system for an MTCA chassis.
  • FIG. 1 is a structural block diagram of the present invention, the dual input power supply system includes an AC voltage input terminal, a DC voltage input terminal, a filtering module, and a reverse connection protection module. , slow start module, voltage conversion module, combined output module, heat dissipation module and voltage output terminal.
  • the filtering module includes a DC filter module and an AC filter module, wherein the DC voltage input end is connected to an input end of the DC filter module, and an output end of the DC filter module is connected to an input end of the reverse connection protection module;
  • the voltage input end is connected to the input end of the AC filter module;
  • the slow start module includes a DC slow start circuit and an AC slow start circuit, and an output end of the reverse connection protection module is connected to an input end of the DC slow start circuit, and the exchange
  • the output end of the filter module is connected to the input end of the AC slow start circuit;
  • the output end of the slow start module is connected to the input end of the voltage conversion module;
  • the output end of the voltage conversion module is connected to the input end of the heat dissipation module;
  • the output end of the voltage conversion module is connected to the input end of the combined output module, and the output end of the combined output module is connected to the voltage output end of the dual input power system.
  • the DC filter module is responsible for filtering out DC input interference.
  • three-level common mode filtering is used, that is, the leakage inductance of the common mode inductor and the X capacitor are filtered out, and the X capacitor is X2 (X1/X3/MKP) to suppress the electromagnetic interference capacitor of the power supply.
  • the AC filtering module is responsible for filtering out AC input interference.
  • FIG. 2 is a circuit diagram of a specific embodiment of the reverse connection protection module of the present invention.
  • the reverse connection protection circuit includes an eighth resistor R8 and a ninth. Resistor R9, tenth resistor R10, eleventh resistor R11, second Zener diode E2, third capacitor C3, fifth NMOS transistor Q5 and sixth NMOS transistor Q6, one end of the eighth resistor R8 is reversed protection An input end of the circuit, the other end of the eighth resistor R8 is connected to one end of the ninth resistor R9; the other end of the ninth resistor R9 is connected to the gate of the fifth NMOS transistor Q5, the fifth NMOS transistor The source of Q5 is connected to the source of the sixth NMOS transistor Q6, the drain of the sixth NMOS transistor Q6 is connected to the drain of the fifth NMOS transistor Q5, and the gate of the sixth NMOS transistor Q6 is connected to the tenth resistor.
  • One end of the R10 is connected, and the other end of the tenth resistor R10 is connected to one end of the ninth resistor R9; one end of the eleventh resistor R11 is connected to one end of the ninth resistor R9, and the other end of the eleventh resistor R11 One end is connected to the drain of the fifth NMOS transistor Q5; the negative pole of the second Zener diode E2 is opposite to the eleventh resistor R11 The terminal is connected, the anode of the second Zener diode E2 is connected to the other end of the eleventh resistor R11; one end of the third capacitor C3 is connected to the cathode of the second Zener diode E2, and the third capacitor C3 is The other end is connected to the anode of the second Zener diode E2.
  • the voltage dividing resistors R8, R9, R10 and R11 in the reverse connection protection circuit ensure that the Vgs of the NMOS transistor is within the normal on-voltage range, and Vgs is the gate of the MOS transistor relative to The voltage of the source; when the DC input voltage is reversed, the NMOS transistor is not turned on, and the internal parasitic diode of the NMOS transistor acts as a reverse connection protection.
  • a double NMOS transistor is used for current sharing.
  • FIG. 3 is a circuit diagram of a specific embodiment of a DC slow start circuit according to the present invention.
  • the DC slow start circuit includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4.
  • the anode of the voltage diode E1 is connected, and the other end of the first capacitor C1 and the drain of the fourth NMOS transistor Q4
  • One end of the third resistor R3 is connected to one end of the first capacitor C1, the other end of the third resistor R3 is connected to the gate of the fourth NMOS transistor Q4; the other end of the first resistor R1 is One end of the fourth resistor R4 is connected, the other end of the fourth resistor R4 is connected to the gate of the third NMOS transistor Q3;
  • the drain of the third NMOS transistor Q3 is connected to one end of the fifth resistor R5, the fifth One end of the resistor R5 is connected to the drain of the fourth NMOS transistor Q4, and the other end of the fifth resistor R5 is connected to the source of the third NMOS transistor Q3; one end of the sixth resistor R6 and the fourth NMOS transistor Q4 a drain connection, the other end of the sixth resistor R6 is connected to the source of the third NMOS transistor Q3
  • Vgs(th) the threshold voltage at which the MOS tube conductance starts to conduct
  • Vds the voltage difference between the D pole and the S pole of the NMOS transistor
  • Ids current flowing through the NMOS transistor D, S pole
  • Vgs, miller The VGS voltage value corresponding to the Miller platform.
  • FIG. 4 is a waveform diagram of a specific embodiment of a DC slow-start circuit of the present invention, in which the NMOS transistor is turned on: in the process of increasing the voltage of Vgs from 0 V to Vgs (th), Ids is 0; when Vgs reaches Vgs ( When th), the NMOS transistor Ids starts to have a current, and as Vgs increases, Ids also gradually increases. When Vgs increases to Vgs, miller, Ids reaches the maximum value of the output.
  • the NMOS transistor When power-on, the NMOS transistor is turned on. Ids is the charging current of the power supply to the load capacitor. When the load is constant, the longer the charging time, the smaller the Ids. The essence of power-on slow-start and hot-swap is to reduce the Ids current at power-on.
  • the Vgs of the NMOS transistors Q3 and Q4 in the DC slow start circuit rise slowly, increasing the value of the NMOS transistor at the time t1, so that the Ids does not increase to a maximum value.
  • the load capacitor is fully charged, the inrush current at the start of the circuit can be reduced.
  • the time t1 mainly depends on the capacitance between the G and S electrodes of the NMOS transistor and the charging current to the capacitor.
  • the first capacitor C1 When the DC power source is pulled out, the first capacitor C1 is quickly discharged through the first diode D1, so that the Vgs of the NMOS transistors Q3 and Q4 are rapidly lowered to meet the needs of the next power-on slow start.
  • the input and output of the DC power supply of the dual input power system can be hot swapped.
  • the AC slow start circuit can realize a slow start when the AC power of the dual input power system is powered on, that is, the input and output of the AC power of the dual input power system can be hot swapped.
  • the voltage conversion module is responsible for converting the DC voltage and the AC voltage of the dual input power system into a required voltage.
  • the voltage conversion module includes a DC voltage conversion circuit and an AC voltage conversion circuit, and an output end of the DC slow start circuit is connected to an input end of the DC voltage conversion circuit, and an output end of the AC slow start circuit and an AC voltage conversion circuit The input is connected.
  • the description is made by using a plurality of AC voltages 220V and a DC voltage 24V.
  • the AC voltage conversion circuit includes an AQ0500IU48ECIND voltage converter, and the converter can convert an AC voltage of 220V into a DC voltage of 48V.
  • the voltage converter can also realize a slow start function when the AC power supply of the dual input power system is powered on, and the DC voltage conversion circuit can use different types of voltage converters to convert the DC voltage 24V into a DC voltage of 48V.
  • the voltage conversion module can use different types of voltage converters to realize voltage type conversion and voltage size conversion. Commonly used voltages are DC voltage 220V and DC voltage 48V. Therefore, the dual input power system can support multiple input voltage combinations: AC voltage 220V, DC voltage 220V, DC voltage 48V, DC voltage 24V. As an input voltage to the dual input power system, the utility of the dual input power system is improved.
  • the combined output module includes a switch control chip, a first switch tube and a second switch tube, and the switch control chip is respectively connected to the first switch tube and the second switch tube and controls their turn-off.
  • One of the AC voltage conversion circuit and the DC voltage conversion circuit normally outputs a voltage into the switch control chip, and the chip can output a normal and stable voltage to the external power supply device.
  • the first switching transistor is a first NMOS transistor Q1; and the second switching transistor is a second NMOS transistor Q2.
  • FIG. 5 is a circuit diagram of a specific embodiment of the combined output module of the present invention.
  • the switch control chip is an LTC4355I chip, and the GATE1 port of the LTC4355I chip is connected to the gate of the first NMOS transistor Q1.
  • the source of the first NMOS transistor Q1 is connected to the OUT port of the LTC4355I chip; the GATE2 port of the LTC4355I chip is connected to the gate of the second NMOS transistor Q2, and the source of the second NMOS transistor Q2 is connected to the OUT port of the LTC4355I chip.
  • the LTC4355I chip can achieve the beneficial effects of preventing current backflow and reducing conduction power consumption, facilitating heat dissipation and improving system power supply reliability.
  • the combined output module further includes a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, and a tenth Eight resistor R18, nineteenth resistor R19, twentieth resistor R20, third Zener diode E3, fourth Zener diode E4, fifth Zener diode E5, first LED LED1 and second LED LED2,
  • the output end of the DC voltage conversion circuit is connected to one end of the twelfth resistor R12, the other end of the twelfth resistor R12 is connected to the anode of the first LED L1, and the cathode of the first LED L1 is grounded;
  • the output of the DC voltage conversion circuit is connected to the drain of the first NMOS transistor Q1, the drain of the first NMOS transistor Q1 is connected to the IN1 terminal of the LTC4355I chip, and the drain and the tenth of the first
  • One end of the seven resistor R17 is connected, the source of the first NMOS transistor Q1 is connected to the source of the second NMOS transistor, and the gate of the first NMOS transistor Q1 is connected to one end of the fourteenth resistor R14.
  • the other end of the fourteen resistor R14 is connected to the GATE1 end of the LTC4355I chip;
  • the other end of the seventeenth resistor R17 is connected to the MON1 end of the LTC4355I chip, the other end of the seventeenth resistor R17 is connected to one end of the nineteenth resistor R19, and the other end of the nineteenth resistor R19 is grounded;
  • the output end of the alternating voltage conversion circuit is connected to one end of the thirteenth resistor R13, and the other end of the thirteenth resistor R13 is connected to the positive terminal of the second light emitting diode LED2
  • the cathode of the second LED diode 2 is grounded;
  • the output of the AC voltage conversion circuit is The drain of the second NMOS transistor Q2
  • the other end of the fifteenth resistor R15 is connected to the GATE2 terminal of the LTC4355I chip, the source of the second NMOS transistor Q2 is connected to the OUT terminal of the LTC4355I chip, and the source of the second NMOS transistor Q2 is connected to the fifth Zener diode.
  • the anode of E5 is connected, the anode of the fifth Zener diode E5 is grounded; the output of the AC voltage conversion circuit is connected to one end of the sixteenth resistor R16, and the other end of the sixteenth resistor R16 is connected to the LTC4355I chip.
  • the other end of the sixteenth resistor R16 is connected to one end of the eighteenth resistor R18, and the other end of the eighteenth resistor R18 is connected to the other end of the nineteenth resistor R19;
  • One end of the resistor R20 is connected to the SET end of the LTC4355I chip, and the other end of the twentieth resistor R20 is connected to the other end of the nineteenth resistor R19;
  • the GND end of the LTC4355I chip is grounded to the GND1 end;
  • the AC voltage conversion circuit is The output terminal and the negative terminal of the third Zener diode E3
  • the anode of the third Zener diode E3 is grounded;
  • the output of the DC voltage conversion circuit is connected to the cathode of the fourth Zener diode E4, and the anode of the fourth Zener diode E4 and the third Zener diode are connected.
  • the voltage actually output by the AC voltage conversion circuit is V1
  • the voltage actually output by the DC voltage conversion circuit is V2
  • the voltages V1 and V2 are input into the chip through the IN1 and IN2 ports of the LTC4355I chip, respectively.
  • the LTC4355I chip determines whether the GATE terminal outputs a high level to drive the NMOS transistor to conduct by detecting a difference VIN-OUT between the voltage input to the IN terminal and the voltage output from the OUT terminal.
  • the GATE terminal When the voltage difference VIN-OUT is higher than 25 mV, the GATE terminal outputs a high level, and the NMOS transistor is turned on; when the voltage difference VIN-OUT is lower than -25 mV, the GATE terminal outputs Low level, the NOMS tube does not work, and the voltage input to the chip is output through the parasitic diode in the NMOS tube, so that the combined output function of the dual power input system can be realized, that is, as long as the AC voltage conversion circuit and the DC One of the normal conversion voltages of the voltage conversion circuit enters the LTC4355I chip, and the chip can output a normal and stable voltage V-out to the external power supply device.
  • the magnitude of the voltage V-out is determined by a large voltage value among the voltages V1 and V2.
  • the magnitude of the voltage V1 is 48V ⁇ 1.5V
  • the magnitude of the voltage V2 is 45V ⁇ 1.5V. Therefore, in the present embodiment, power is preferentially supplied by the AC voltage conversion circuit. Details are as follows:
  • the voltage V-out is a voltage V1;
  • the voltage V-out is a voltage V2;
  • the voltage V-out is the voltage V1;
  • the voltage V-out alternates between voltage V1 and voltage V2. Since the NMOS transistor has a parasitic diode, the voltage V -out does not appear to be 0.
  • the dual input power system for the MTCA chassis further includes a heat dissipation module, and an output end of the voltage conversion module is connected to an input end of the heat dissipation module.
  • the heat dissipation module is responsible for the heat dissipation work of the entire dual input power system, avoiding the coefficient variation of the system due to the heat of the components, affecting the normal operation of the circuit, and improving the stability of the dual input power system.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Power Conversion In General (AREA)
  • Dc-Dc Converters (AREA)

Abstract

L'invention porte sur un système d'alimentation électrique à double entrée, pour châssis MTCA, qui comporte une borne d'entrée de tension alternative, une borne d'entrée de tension continue et une borne de sortie de tension. Le système d'alimentation électrique à double entrée comporte en outre un module de démarrage lent, un module de conversion de tension et un module de sortie combinée, la borne de sortie du module de démarrage lent étant connectée à la borne d'entrée du module de conversion de tension, la borne de sortie du module de conversion de tension étant connectée à la borne d'entrée du module de sortie combinée, et la borne de sortie du module de sortie combinée étant connectée à la borne de sortie de tension du système d'alimentation électrique à double entrée. Le système d'alimentation électrique à double entrée possède deux circuits de conversion de tension, qui peuvent exécuter une double entrée d'alimentation, être commodes à utiliser pour un utilisateur, être flexibles en application et offrir une bonne fiabilité ; l'entrée et la sortie du système d'alimentation électrique à double entrée prennent toutes les deux en charge un remplacement à chaud, si bien qu'une mise hors tension n'est pas nécessaire pour remplacer une carte d'alimentation électrique pour le système d'alimentation électrique à double entrée, ce qui est très pratique ; le système d'alimentation électrique à double entrée prend également en charge des secours d'entrée et de sortie, si bien que le système d'alimentation électrique présente une bonne stabilité et peut être largement utilisé dans le domaine des alimentations électriques.
PCT/CN2016/072116 2015-12-31 2016-01-26 Système d'alimentation électrique à double entrée pour châssis mtca Ceased WO2017113458A1 (fr)

Applications Claiming Priority (2)

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CN201511030064.7 2015-12-31
CN201511030064.7A CN105515352A (zh) 2015-12-31 2015-12-31 一种用于mtca机框的双输入电源系统

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