RU1774477C - Current pulse generator - Google Patents

Abstract

The invention relates to the field of generating periodically repeating pulses using controllable discharge devices and can be used, for example, in electrical discharge machining plants. SUBSTANCE: generator contains a thyristor switch with a switching capacitance, in the overcharge circuit of which the primary winding of the transformer is connected. In order to expand the scope of use by increasing the energy recovery coefficient between the terminals of the secondary winding of the said transformer, a voltage doubler input is connected, each output pole of which is connected to the same pole of the generator power supply, and the current pulse from the voltage doubler output is formed with the current flow load 1 il.

Description

The invention relates to the field of generating periodically repeating pulses using controllable discharge devices and can be used, for example, in electrical discharge machining plants.

The aim of the invention is to expand the scope by increasing the energy recovery coefficient in a current pulse generator.

The drawing shows a schematic diagram of the proposed generator.

The current pulse generator comprises a load 1 connected through a turn-on thyristor 2 parallel to a power source 3, a switching capacitor 4, connected through a blank-off thyristor 5 parallel to a turn-on thyristor 2 and shunted through a thyristor 6 with a recharge inductance 7, which is the primary winding of the transformer 8, between

the leads of the secondary winding 9 of which a voltage doubler 10 is connected, consisting of a capacitance 11 and a diode 12, each output pole of which is connected to the same pole of the power supply 3.

The current pulse generator operates as follows.

When a control pulse is applied to thyristor 5, the latter opens and the switching capacitor 4 starts charging to a certain potential, after which control pulses are applied to thyristors 2 and 6, the latter are opened, and thyristor 5 is closed from the voltage applied back to it from the switching capacitor 4 and the increase in the running current in load 1 and the recharging of the switching capacitor 4 through the thyristor 6 and the primary winding 7 of the transformer 8 begin.

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The current drop in the load 1 begins after the quenching thyristor 5 is turned on. At this point, the recharging of the switching capacitor is completed, the capacitor plate 4 connected to the thyristor 2 has a negative potential, and the plate connected to the thyristor 5 has a positive potential. After turning on thyristor 5, thyristor 2 is turned off, the current in load 1 drops and capacitor 4 is recharged in the circuit: load 1, capacitor 4, thyristor 5. After decreasing the current to zero, thyristor 5 is closed and the device is ready for further operation.

During the current drop in the primary winding 7 of the transformer 8 from its secondary winding 9, a current pulse is applied to the voltage doubler 10, which charges its capacitor 11 to a certain potential. During the recharging of the capacitor 4 and the operation of the load current 1 from the output of the voltage multiplier 10, a recharge current pulse is supplied to the load 1, which reduces the energy consumption from the power supply 3.

Claims (1)

SUMMARY OF THE INVENTION A current pulse generator made in accordance with a thyristor switch circuit with a switching capacitance, in the overcharge circuit of which a primary winding of a transformer is connected, characterized in that, in order to expand the area of use by increasing the energy recovery coefficient, between the terminals of the secondary winding of the said transformer the input of the voltage doubler, each output pole of which is connected to the same pole of the generator power supply, and the current pulse from the output of the voltage doubler Yeni sfazirooan with a current stroke of the load current.