Cascade-type single-phase bipolar high-voltage square wave pulse power source and using method thereof

Abstract

The invention relates to a cascade-type single-phase bipolar high-voltage square wave pulse power source and a using method thereof. The power source is characterized in that a pulse control signal generation module is connected with n same pulse distribution modules, and each module comprises a connector integrated circuit and m groups of same light emitters; the power source is provided with m*n same inversion circuit units, and each inversion circuit unit comprises a group of optical receivers and a single-phase bridge-type pulse inversion circuit; each light emitter and optical receiver are connected by two paths of optical fiber; and the output port of each single-phase bridge-type pulse inversion circuit is connected in series to form the output port of the power source. The using method of the power source is as follows: two pulse control signals from the pulse control signal generation module are transmitted to n pulse distribution modules; each of the pulse control signals is converted to m groups of pulse synchronous control signals; through optical transmission of the pulse synchronous control signals, n*m inversion circuits are controlled to respectively generate synchronous same single-phase bipolar square wave pulses; and the square wave pulses are connected in series as output of the power source. By using the power source provided by the invention, up to 24 groups of pulse synchronous control signals transmitted in high isolation can be generated, and high-performance bipolar square wave voltage of required voltage class can be obtained after the pulse synchronous control signals are connected in cascade.

Description

(1) Technical field [0001] The invention relates to the technical field of high-voltage pulse power supplies, in particular to a cascaded single-phase bipolar high-voltage square-wave pulse power supply and a use method thereof. (2) Background technology [0002] With the development of power electronics technology, high-power frequency conversion speed control systems are widely used. In order to ensure the safety and life of use, the insulation materials and insulation structures of frequency conversion speed control motors need to be subjected to accelerated aging life evaluation experiments under high-voltage pulse electrical stress. . The key to the accelerated aging life evaluation experimental system is the high-voltage symmetrical bipolar square wave pulse power supply, which requires the peak-to-peak value of the output high-voltage square wave pulse to reach more than one thousand volts, and must meet the requirements of rapid pulse edge changes, overshoot and puls...

AI Technical Summary

Problems solved by technology

High-speed optocoupler devices have good pulse isolation transmission performance, but the isolation voltage cannot meet the cascaded single-phase bipolar high-voltage square wave pulse power supply for accelerated aging of insulating materials, so the pulse transformer isolation transmission method is mainly used at present; the pulse transformer isolation The transmission can meet the requirements of the isolation voltage, but the synchronization of the transmission is not good and the pulse frequency does not change, which is not suitable for the transmission of the synchronous pulse signal when the pulse frequency changes according to the experimental standard. With such an isolation transmission method, multiple bridge inverters When the circuit is cascaded, the total square wave pulse power supply voltage amplitude can meet the requirements, but the pulse rise time and pulse rising edge waveform become worse

Therefore, there is currently a lack of a symmetrical bipolar high-voltage pulse power supply suitable for accelerated aging life assessment of electrical insulation materials and insulation structures.

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