SU1325633A1 - Dc voltage-to-dc voltage converter - Google Patents

Abstract

The invention relates to electrical engineering and can be used on electric vehicles with a controlled electric drive. The purpose of the invention is to reduce energy losses, mass and size. The device contains connected via the inductor saturation 2 to the input 8 and output 12 of the terminals of the flea 1 recovery diodes. Parallel to block 1. a circuit is included from the additionally introduced block 13, reversibly switched on dynistor and diode 4. Block 13 i (Л с; i; 13 15 i Sfe - ХХ V / А: о о СДС Od 00 DO х 9

Description

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shunted by a circuit from one of the windings of the additionally introduced ICP pulse transformer 16 and an additional feed-through capacitor 15. A circuit from the other winding of the i 6 transformer and recharge thyristors block 7 is switched parallel to block 1 through the block 5 switching thyristors. The common connection point of the counter-connected windings, the transformer 16 is connected to one of the plates of the additionally inserted differentiating capacitor 17, and through a co-mutating reactor to one of the terminals of the unit .3

The invention relates to electrical engineering and can be applied to electric vehicles with a controlled electric motor.

The purpose of the invention is to reduce the loss of energy, mass and size of the converter.

The drawing shows the block diagram of the Converter.

The converter contains a recovery diode unit 1, a saturation throttle 2, a switching commutation unit 3, a switching reactor 4, a switching thyristor unit 5, a charging resistance 6, a transfer thyristor unit 7, a power bus 8 and 9, a control unit 10, output pins 11 and 2 for connecting the load, for example, a traction motor, unit 13 of reversibly included dinistors C PBjU, diode 1A, pass capacitor 15, pulse incremental transformer 16, differentiating capacitor i 7.

The saturation throttle 2 is connected by one output to the positive bus 8. The second output of the throttle is connected to the cathode output of the diode unit 1. anode block output of 13 dinistors, the end of the secondary terminal of the winding of the traastomator 16 ,. the beginning of the primary winding of this transformer, the output of the capacitor 17 and the output of the reactor 4. The second output of the latter is connected to the output of unit 3, the other output of which is connected to the anode output of the commutator 111, hr capacitor. The (,) carbon barrier of the capacitor 17 and the other output of block 3 are connected to the anodic and cathodic leads of block 5 and block 7, respectively, and through charge resistance 6 to the input 9 and output 11 of the terminals. The additionally introduced device elements and the indicated connection of them make it possible to eliminate overvoltages on the elements, to ensure simultaneous switching on of the dynistors of the unit 13 without equalizing the control current currents, as well as to reduce the losses on magnetic reshaping of the throttles 2 and the capacitance of the capacitors.

5, the output resistance of the charge resistance 6 and the cathode output of the unit 7. The cathode output of the unit 5 is connected to the cathode of the diode 14, the output 12 and the anode output of the unit I. The anode of the diode 4 is connected to the cathode input of the i3 unit. The anode terminal of block 7 is connected to the end of the first-stage winding of the transformer 16. Minus bus 9 is connected to the second terminal of resistance 6 and terminal Ii. The capacitor 5 is connected between the beginning of the secondary winding of the transformer 16 and the cathode terminal of block 3. The control unit O is connected to blocks 5 and 7. The direct current-voltage characteristic of the WFD is similar to the direct characteristic of a conventional thyristor. The reverse characteristic of the high-pressure switch is similar to the direct characteristic of a diode.

The Converter operates as follows.

On the control signal from unit 10, unit 7 is turned on and capacitors 3 and 17 begin to discharge through the primary winding of the step-up transformer 16. When the capacitor 17 is discharged at the second winding of the transformer 16, a short reverse voltage pulse for the XRD polarity unit 13 is generated. and through block 13 a small reverse current flows, leading to its subsequent switching. When a pulse of control current passes through the block 13, the rise of the main current is delayed by the choke 2

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iasycek. At the moment when the heart of the throttle 2 is pressed to block 13, the direct voltage is applied again, and it switches without delay along the bus 8 - throttle 2 - RVD block I3 - diode 14 - conclusions 12 and I1 - bus 9 passes a fast-growing pulse main current. Simultaneously with the switching of the main current, the recharging of the capacitors of the block 3 through the reactor 4 and the block 7 of the thyristors occurs.

After a voltage pulse of a predetermined duration is generated at the terminals for connecting the load of the traction motor, the control unit 10 triggers a signal to turn on the thyristor unit 5. In this case, through the reactor 4, the circuit, consisting of in series, connected to the high-pressure hoses 13 and diode 14, is applied a reverse voltage from the capacitors' block 3, leading to the switching off of the high-pressure hoses block. Then a subchain of the block 3 of the capacitor and the capacitor 17 occurs through the charge resistance 6 and the circuit returns to the initial state.

The introduction of an RVD unit increases the reliability of the converter, since overvoltages on the elements of the block are excluded when they are switched and such an idea as the critical rate of increase of the current disappears. The simultaneous switching on of all elements of the main switch creates the possibility of using a large number of series-connected instruments in the RVD unit. In this case, it is not necessary to level the control currents between the individual dinistors, since they are switched on by a reverse current pulse common to the entire RVD column. As a result, the working voltage of the dynors of the RVD unit may be small (hundreds. Volts), and the turn-off time is very short (units of microseconds). At the same time, the capacity of the unit 3 of switching capacitors is significantly reduced, since it is proportional to the turn-off time of the main switch. The small amount required for switching the high-pressure section of the delay in the increase of the main current (1-2 μs allows us to significantly reduce the weight and size of the throttles and reduce the energy loss due to its magnetization reversal.

256334

Reducing the loss of energy in the drosse - le nscene, in the RVD unit (due to the uniform switching of the dynistors) and when the RVD unit is turned off (due to the decrease in the off time), allows to reduce the total energy loss in the converter.

Switching the RVD unit is performed using a diode 14, a pass-through capacitor 15, a differentiating capacitor 17 and a transformer 16. Diode 14 prevents the passage of 5 reverse scientific research institutes through the RVD when they are turned off, and thus makes it possible to carry out the shutdown process itself. The capacitor 17 and the transformer 16 form a fast-growing pulse of the control current of the RVD unit.

2Q Capacitor I5 serves to separate the main circuit and the high-pressure control circuit.

Claims (1)

Invention Formula 25 DC / DC converter containing the main semiconductor switch, the recovery diode unit, the Nascendor choke, the switching capacitor unit, the switching reactor, a switching thyristor unit, charge resistance, a control unit, two output pins for connecting the load, a recharge thyristor unit, and two power supply buses, one single throttle connected to the positive source bus, its second end is connected to the cathode output of the recuperation diode unit , the anode terminal of the main switch and the reactor reactor, the second terminal of which is connected to one terminal of the capacitor unit, the second terminal of which is connected to the terminal of the charging junction (anchoring, anode terminal of the comm module) thyristor wiping devices and a cathode output of a recharge thyristor block, a recharge thyristor block and a block of commuting thyristors are connected to the control block, the second display 40 50 55 A series resistance is connected to the minus source bus and one of the output terminals for connecting the load, the second output terminal is connected to the cathode output of the switching thyristor unit and the anode output of the recovery diode unit, in order to reduce energy losses, mass and size, additionally Rve., 1 diode, arrival coidg 5, boosting impulse tragsformator and differentiator capacitor; and the main switch is located in the Nnd unit of the reverse switches ON of the Distor, anodic B.GSHYNYDISTOROK connected with the beginning of PS RPI Igoy GMC-TKK transformerp. with KOKUO S et about the recurrent winding and upwards, 11G capacitor, the second output from the cattle; 1kmm Bbsi rjjifif, Gggto- to r1 (P (Czlr d1 b (x tris: torus, apo dy si; 5k); coaxHHCH thyristors with the end of the irepn-ary winding of the transformer ora; (} I get from the pass-through commutator, rtoro B1, the waters of which are matched with - cathol g M M BbtHo ;; o.m 5. psnersnio about switchable dynistoron and ay-diode, the cathode of which CORDDPRP.R C p high output.