SU1487149A1 - Pulsed load power supply unit - Google Patents

Description

The invention relates to a pulse technique and can be used.

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but, for example, to charge capacitive energy storage devices. The purpose of the invention is to increase the conversion efficiency when powering the device from a synchronous generator is achieved by providing a capacitive subexcitation of a synchronous generator. The device contains the first input bus | 1, thyristors 2, 3, 12 and 13, the first winding 5 of the transformer 6, the second input bus 7, the second winding 8 of the transformer 6, the rectifier 9 with a pulse load 10, a synchronous generator 11, the anchor winding 15 synchronous generator, capacitors 4 and 14. 1 Il.

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The invention relates to a pulse technique and can be used, for example, when charging capacitive energy storage devices.

The purpose of the invention is to increase the conversion efficiency when powering the device from a synchronous generator, due to the provision of capacitive excitation of a synchronous generator.

The drawing shows a structural electrical circuit of the device.

The impulse load powering device comprises a first input bus 1 connected to the anode of the first thyristor 2, the cathode of which is connected to the anode of the second thyristor 3, and through the first capacitor 4 is connected to the first terminal of the first winding 5 of the transformer 6, the second terminal of which is connected to the cathode of the second thyristor 3 and the second input bus 7, the second winding 8 of the transformer 6 is connected via a rectifier 9 with it, the pulse load 10, the synchronous generator 11, the third and fourth thyristors 12 and 13 the second capacitor 14, the first and second input buses 1 and 7 according to connected to the anchor winding 15 'of the synchronous generator 11, the third thyristor 12 cathode is connected to the first input bus 1, the anode to the cathode of the fourth thyristor 13, and through the second capacitor 14 to the first output of the first winding 5 of the transformer 6, the second output of which is connected to the anode fourth thyristor 13.

The device works as follows.

The source of alternating voltage synchronous generator 11 - is excited to EMF idling. At the moment of time when the EMF passes through zero to a positive half-wave, a control signal is output to the control electrode of the thyristor 2 (control angle Y = 0). Capacitor 4 is charged from source 1. At the same time, the capacitor performs two functions: limiting the current in the load circuit (charging circuit of the impulse load) and matching the source 11 and the pulse transformer 6. The charging circuit parameters are selected from the charge condition of the capacitor 4 for a quarter of the change period EMF generator, i.e. after 90 ° from the beginning of time, the voltage on the capacitor will become

equal in absolute magnitude to the amplitude of the voltage generator. The thyristor 2 is locked with a reverse voltage and a control signal is issued to the thyristor 3. Capacitor 4 is discharged, transferring the stored energy to the charging of the capacitive drive and the remagnetization of the pulse transformer. The parameters of the discharge circuit are chosen from the condition that the oscillatory process of energy transfer is not more than 90 °. After the discharge of the capacitor 4, the thyristor 3 is closed due to a change in the polarity of the source 11. The process of energy transfer is repeated through the metering capacitor 14 at the negative half-wave of the supply voltage. During the period of change in the voltage of the generator, charge-discharge of metering capacitors is 4.14 and batch transfer of energy to the capacitive drive. As the capacitive storage device charges, the voltage envelope on the primary winding of the pulse transformer increases due to the choice of charging and discharge circuits from the condition of the oscillating mode. When the storage capacitor (load 10) reaches the specified voltage level, the control unit turns off the thyristor switches and generates a command to turn on the capacitive drive to the active load. During the pause period, the switch is in idle mode.

The device allows, in comparison with the known, to improve mass-dimensional indicators by 1.3-1.5 times due to the operation of the elements of the device at a higher frequency.

The efficiency of energy conversion is increased by a factor of 1.2-1.3 due to the charge of a capacitive drive with constant power and the oscillatory charge of metering capacitors.

Claims (1)

Claim A pulsed load power supply device containing a first input bus connected to the anode of the first thyristor, the cathode of which is connected to the anode of the second thyristor, and through the first capacitor to the first output 5 6 1487 the house of the first winding of the transformer, the second terminal of which is connected to the cathode of the second thyristor and the second input sheath, the second, the transformer winding is connected through a rectifier with a pulsed load, characterized in that, in order to increase K1SCh conversion when it is powered from a synchronous generator, the third and fourth thyristors, a second capacitor, the input bus connected to the armature winding of the synchronous generator, the cathode of the thyristor is coupled to a third per- howling input bus ^1, an anode - a cathode of a fourth thyristor, and by a second capacitor - a first terminal of the first winding of the transformer, a second terminal which is connected to the anode of the fourth thyristor.