SU900413A1 - Device for charging reservoir capacitor - Google Patents

Description

(54) DEVICE FOR ACCUMULATING CAPACITOR CHARGING

one

The invention relates to a pulsed power supply system and can be used in high-power modulators and experimental physics devices.

A device for charging a storage capacitor is known that contains a three-phase rectifier connected through a matching transformer and a current sensor to a controller whose power input is connected to an AC source, a block of key elements with a control circuit of key elements is installed at the control input of the controller, in addition , there are current level and voltage level adjusters, voltage level lock, measuring unit, storage capacitor, discharge 1.

The disadvantage of the device is as follows. In the process of charging the storage capacitor, the device maintains a charge current at a constant level. This does not ensure the constancy of the power taken from the energy source during charging and, therefore, the minimum charge time.

The closest to the invention in its technical essence is the charge device accumulative

a capacitor consisting of a reactive element installed in series between a controlled frequency converter connected to a power source and a rectifier input with a storage capacitor connected to its output, a voltage sensor connected in parallel with the storage capacitor, and

10 feedback 2.

However, in the process of charging the storage capacitor, the feedback unit generates a control signal depending on the magnitude of the voltage

15 on the co-condenser and maintains the charge current at a constant level. This is achieved by varying the frequency of the controlled frequency converter and, therefore, the resistance of the reactive substrate. The law of constant current in the process of charging does not ensure the maximum speed of the process of charging the storage capacitor.

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The purpose of the invention is to reduce the charging time of the storage capacitor.

This goal is achieved by the fact that a storage capacitor charging device consisting of a reactive element installed in series between a controlled frequency converter, connected to a power source and a rectifier input with a storage capacitor connected to its output, a voltage sensor connected parallel to the storage capacitor, and the feedback unit, a multiplication unit and a charge current sensor are introduced, one of the inputs of the multiplication unit is connected to the output of the charge current sensor, the other stroke - to the output of the sensor voltage output of multiplying unit is connected to the input of the adder, the adder output being connected to the input of the feedback unit.

FIG. 1 shows a block diagram of a storage capacitor charging device; in fig. 2 is a graph showing the operation of the device.

The storage capacitor charge device consists of a reactive element 1 installed between controlled frequency converter 2 and rectifier 3 with storage capacitor 4, voltage sensor 5 and charge current sensor b, the outputs of voltage sensors 5 and 6 on and on to the inputs of the multiplication unit 7, the output of the multiplication unit 7 is connected to the input of the adder 8, the output of the adder 8 is connected to the input of the feedback unit 9, and the output of the latter is connected to the adjustable frequency converter 2, controlled by the frequency converter 2 Yuchen to the source of 10 power.

The charging device of the storage capacitor operates as follows.

In the process of charging the storage capacitor 4, the sensors 5 and 6 of the voltage and the charging current convert the voltage on the storage capacitor 4 and the charge current to values that are proportional to these parameters. The multiplication unit 7 generates a signal proportional to the power value and makes a comparison with a given power setting (shown by a dotted line). The output signal of the multiplication unit 7 is fed to the input of the adder 8, the output of the adder 8 is connected to the input of the feedback unit 9, which acts on the controlled frequency converter 2 so that the amount of power withdrawn from power supply 10 is maintained at a predetermined level during the entire charging process. If inductance is set as reactive element 1, then when the current value of the power is rejected from the setpoint, the frequency at the output of the equalized converter is 2 hours - you need to increase to increase the inductive resistance of reactive element 1 and, thereby, reduce the amount of power withdrawn. As the frequency decreases, the amount of power drawn out increases. In the case of the use of a capacitive reactive element 1, the law of frequency variation is reversed. The high accuracy of maintaining the power at a given level during the charging of the storage capacitor 4 is determined by the overall gain of the multiplication unit 7 of the adder 8 and the feedback unit 9

Claims (1)

1. A storage capacitor charge device consisting of a reactive element installed in series between a controlled frequency converter, connected to a power source and a rectifier input with a storage capacitor connected to its output, a voltage sensor connected in parallel with the storage capacitor, and a reverse unit Communication, characterized in that, in order to reduce the charging capacitor charge time, a multiplication unit and a charge current sensor are introduced into the device, one of the inputs of the unit the multiplication is connected to the output of the charge current sensor, another input to the output of the voltage sensor, the output of the multiplying unit is connected to the input of the adder, and the output of the adder is connected to the input of the feedback unit. Sources of information taken into account in the examination 1.3Avatsky EG, and others. The construction of charging systems for powerful capacitive storage devices of impulse voltage generators. Sat Power supply systems of pulse power consumers. Ed., P. V.Golubeva, M ,, Energie, 1976, p. 22-25. 2, US Patent 3,52228, cl. H 02 N 3/32, G 05 F 1/56 1/68, 1970 (prototype),