CN202475303U - Cascade type single-phase bipolarity high voltage square wave pulse power supply - Google Patents

Abstract

Provided is a cascade type single-phase bipolarity high voltage square wave pulse power supply, comprising a single-phase bridge type pulse inversion circuit, a pulse control signal generation module, a pulse distribution module, and an inversion circuit unit, wherein the pulse control signal generation module is connected with n same pulse distribution modules, with each comprising a connector integrated circuit and m sets of same light emitters; m*n same inversion circuit units are configured, with each inversion circuit unit comprising a set of light receiver and a single-phase bridge type pulse inversion circuit; each light emitter and light receiver are connected by two paths of fibers; the output terminals of each single-phase bridge type pulse inversion circuit are serially connected into an output terminal of the cascade type single-phase bipolarity high voltage square wave pulse power supply; two pulse control signals of the pulse control signal generation module are sent to n pulse distribution modules, with each being transformed into m sets of pulse synchronization control signals; and the n*m inversion circuits are controlled via optical transmission to respectively generate synchronous same single-phase bipolarity square-wave pulses, which are serially connected into the output of the power supply. The cascade type single-phase bipolarity high voltage square wave pulse power supply can generate as many as 24 sets of pulse synchronization control signals of high isolation transmission, and obtain the high performance bipolarity square wave voltage of the required voltage grade after cascade.

Description

Tandem type single-phase bipolar property high-voltage square-wave pulse power source

(1) technical field

The utility model relates to the high-voltage pulse power source technical field, is specially a kind of tandem type single-phase bipolar property high-voltage square-wave pulse power source.

(2) background technology

Development along with power electronic technology; Power frequency speed control system of high is used widely; For guaranteeing safe in utilization and the life-span, the insulating material of frequency control motor wherein and insulation system need carry out accelerated life assessment experiment under the high-voltage pulse electric stress.Key in this accelerated life assessment experimental system is a high pressure symmetric double polarity square-wave pulse power source, requires the high-voltage square-wave pulse peak peak value of output to reach more than the kilovolt, and need satisfy the requirement that porch variation fast, overshoot and pulse top fall.Because the restriction of the withstand voltage properties of existing power electronic device; Conventional single-phase bridge inverter circuit can obtain symmetric double polarity square-wave voltage; Its waveform also meets the requirements; Single its electric pressure is merely below the 1KV peak-to-peak value, can't reach the high pressure requirement of required square-wave pulse power source such as insulating material square-wave pulse electric stress accelerating aging test; Utilize pulse transformer to boost,, be difficult to satisfy the requirement that porch changes fast, wave distortion is little though the pulse peak peak value can reach requirement.The 1KV symmetrical square wave pulse power cascade stack that utilizes a plurality of bridge inverter main circuits to produce; Can obtain symmetric double polarity high-voltage square-wave pulse power source; But this needs a plurality of bridge inverter main circuits of cascade on electrical equipment, to isolate and synchronous working, and requires isolation voltage to be not less than the peak-to-peak value of pulse voltage.In order to realize synchronous working, need a common impulsive synchronization control signal, and isolation and the synchronous bridge inverter main circuit that is sent to each cascade.High-speed photoelectric coupler spare has pulse preferably and isolates conveying function, but isolation voltage can not satisfy the insulating material accelerated ageing with tandem type single-phase bipolar property high-voltage square-wave pulse power source, so current main employing pulse transformer is isolated load mode; Pulse transformer is isolated the requirement that transmission can be satisfied isolation voltage; But existence transmission synchronism is bad and require pulse frequency not change; Synchronization pulse transmission requirement when the incompatibility pulse frequency is pressed experimental standard and changed is with such isolation transfer method, during a plurality of bridge inverter main circuit cascade; Total square-wave pulse power source voltage magnitude can meet the demands, but pulse rise time and rising edge of a pulse waveform variation.So lack the assessment of a kind of suitable electrical insulating material and insulation system accelerated life at present with symmetric double polarity high-voltage pulse power source.

(3) utility model content

The purpose of the utility model is a kind of tandem type single-phase bipolar property high-voltage square-wave pulse power source of design; The a plurality of single-phase bridge pulse inverter circuits that comprise the cascade that is connected with the pulse control signal generation module, the bipolarity high-voltage square-wave pulse of exporting required electric pressure.

The tandem type single-phase bipolar property high-voltage square-wave pulse power source of the utility model design comprises single-phase bridge pulse inverter circuit; Also comprise pulse control signal generation module, pulse distribution module and inverter circuit unit; The pulse distribution module contains connector integrated circuit and optical transmitting set; Each inverter circuit unit comprises a single-phase bridge pulse inverter circuit and one group of optical receiver, and every group of optical receiver comprises 2 optical receivers that receive positive negative signal; The electrical signal of optical receiver inserts the control end of single-phase bridge pulse inverter circuit.The pulse control signal generation module is for producing microprocessor or the intelligent logical circuit module of two identical pulse control signal PC+ of phase phasic difference 180 degree, pulse duration and PC-; The pulse control signal generation module is connected to n identical pulse distribution module, and n is 1～6 integer; Each pulse distribution module contains a connector integrated circuit and the identical optical transmitting set of m group, and m is 1～4 integer, and every group of optical transmitting set comprises 2 optical transmitting sets launching positive negative signal; Dispose the identical inverter circuit unit of the same quantity that matches with the mn group optical transmitting set of pulse distribution module, each optical transmitting set is connected by two-way optical fiber respectively with optical receiving set.Output after the output series connection of the single-phase bridge pulse inverter circuit of each inverter circuit unit is the output of this single-phase bipolar property high-voltage square-wave pulse power source.

Two pulse control signal PC+ that the pulse control signal generation module produces and the Dead Time between the PC-are 200ns～1000ns, and the pulse repetition period is 50 μ s～1000 μ s.

The signal of telecommunication of 2 optical receivers output of each inverter circuit unit inserts the logic gates of this inverter circuit unit, and 4 control signals of gained insert the control end of 4 brachium pontis power transistors of single-phase bridge pulse inverter circuit respectively through optical couple isolation drive circuit.

The pulse control signal generation module of the utility model tandem type single-phase bipolar property high-voltage square-wave pulse power source produces two identical pulse control signal PC+ of phase phasic difference 180 degree, pulse duration and PC-; Dead Time between PC+ and the PC-is 200ns～1000ns, and the pulse repetition period is 50 μ s～1000 μ s; Send into n the pulse distribution module that is connect;

The connector integrated circuit of each pulse distribution module converts the pulse control signal PC+ and the PC-of input into m group pulse synchronous control signal; The connector integrated circuit of first pulse distribution module produces m group pulse synchronous control signal (P11+, P11-)～(P1m+, P1m-), sends into m group optical transmitting set (TX11+, TX11-)～(TX1m+, the TX1m-) of this module; By that analogy, the connector integrated circuit of n pulse distribution module produces m group pulse synchronous control signal (Pn1+, Pn1-)～(Pnm+, Pnm-), sends into m group optical transmitting set (TXn1+, TXn1-)～(TXnm+, the TXnm-) of this module;

Each is organized synchronous control signal and converts light signal at optical transmitting set, isolates to be sent to through optical fiber and respectively organizes optical receiver (RXn1+, RXn1-)～(RXnm+, RXnm-) in each inverter circuit unit.Each optical receiver in each inverter circuit unit converts the light signal that receives into the signal of telecommunication; Send into respectively and carry out shaping pulse by logic gates and produce 4 tunnel control signals with Si Mite characteristic; Drive control signal through optical couple isolation drive circuit respectively again as power transistor on 4 brachium pontis of single-phase bridge pulse inverter circuit; Control inverter bridge synchronous working; The single-phase bridge pulse inverter circuit of nm inverter circuit unit produces synchronous identical single-phase bipolar property square-wave pulse, and the output after the output series connection of nm single-phase bridge pulse inverter circuit is this single-phase bipolar property high-voltage square-wave pulse power source output.

The advantage of the utility model tandem type single-phase bipolar property high-voltage square-wave pulse power source is: 1, can produce nearly 24 group pulse synchronous control signals; Realization is to reaching the Synchronization Control of 24 single-phase bridge pulse inverter circuits; A plurality of single-phase bridge pulse inverter circuit synchronous workings; Produce a plurality of synchronous square wave pulse voltages, can obtain the high-performance bipolar square wave voltage of required voltage grade after the cascade; 2, solve the high-isolation transmission of synchronous control signal, guaranteed each pulse inverter circuit synchronous working; 3, each circuit module all adopts existing components and parts and integrated circuit, is easy to realize; 4, be suitable as in the high-voltage pulse power source of high-voltage pulse ageing of insulation test.

(4) description of drawings

Fig. 1 is the structural representation of this tandem type single-phase bipolar property high-voltage square-wave pulse power source embodiment.

(5) embodiment

Embodiment is as shown in Figure 1 for this tandem type single-phase bipolar property high-voltage square-wave pulse power source; Comprise pulse control signal generation module, pulse distribution module and inverter circuit unit; This routine pulse control signal generation module is for producing the microprocessor of two identical pulse control signal PC+ of phase phasic difference 180 degree, pulse duration and PC-; Two pulse control signal PC+ that produced and the Dead Time between the PC-are 500ns, and the pulse repetition period is 500 μ s.The pulse control signal generation module is connected to 2 identical pulse distribution modules; Each pulse distribution module contains a connector integrated circuit and 4 groups of identical optical transmitting sets, and every group of optical transmitting set comprises 2 optical transmitting sets launching positive negative signal; Dispose 4 identical inverter circuit unit, each inverter circuit unit comprises a single-phase bridge pulse inverter circuit and one group of optical receiver, and every group of optical receiver comprises 2 optical receivers that receive positive negative signal; The electrical signal of 2 optical receivers of each inverter circuit unit inserts logic gates, and 4 control signals of gained insert the control end of 4 brachium pontis power transistors of single-phase bridge pulse inverter circuit respectively through optical couple isolation drive circuit.

Each optical transmitting set is connected by two-way optical fiber respectively with optical receiving set.Output after the output series connection of 8 single-phase bridge pulse inverter circuits of 2 inverter circuit unit is the output of this single-phase bipolar property high-voltage square-wave pulse power source.

The foregoing description is merely concrete example of purpose, technical scheme and beneficial effect further explain to the utility model, and the utility model is not to be defined in this.All any modifications of within the scope of disclosure of the utility model, being made, be equal to replacement, improvement etc., all be included within the protection range of the utility model.

Claims (3)

1. tandem type single-phase bipolar property high-voltage square-wave pulse power source comprises single-phase bridge pulse inverter circuit, it is characterized in that:

Also comprise pulse control signal generation module, pulse distribution module and inverter circuit unit; The pulse distribution module contains connector integrated circuit and optical transmitting set; Each inverter circuit unit comprises a single-phase bridge pulse inverter circuit and one group of optical receiver; Every group of optical receiver comprises 2 optical receivers that receive positive negative signal, and the electrical signal of optical receiver inserts the control end of single-phase bridge pulse inverter circuit; The pulse control signal generation module is for producing microprocessor or the intelligent logical circuit module of two identical pulse control signal PC+ of phase phasic difference 180 degree, pulse duration and PC-; The pulse control signal generation module is connected to n identical pulse distribution module, and n is 1～6 integer; Each pulse distribution module contains a connector integrated circuit and the identical optical transmitting set of m group, and m is 1～4 integer, and every group of optical transmitting set comprises 2 optical transmitting sets launching positive negative signal; Dispose the identical inverter circuit unit of the same quantity that matches with the mn group optical transmitting set of pulse distribution module, each optical transmitting set is connected by two-way optical fiber respectively with optical receiving set; Output after the output series connection of the single-phase bridge pulse inverter circuit of each inverter circuit unit is the output of this single-phase bipolar property high-voltage square-wave pulse power source.

2. tandem type single-phase bipolar property high-voltage square-wave pulse power source according to claim 1 is characterized in that:

Two pulse control signal PC+ that said pulse control signal generation module produces and the Dead Time between the PC-are 200ns～1000ns, and the pulse repetition period is 50 μ s～1000 μ s.

3. tandem type single-phase bipolar property high-voltage square-wave pulse power source according to claim 1 is characterized in that:

The signal of telecommunication of 2 optical receivers output of each inverter circuit unit inserts the logic gates of this inverter circuit unit, and 4 control signals of gained insert the control end of 4 brachium pontis power transistors of single-phase bridge pulse inverter circuit respectively through optical couple isolation drive circuit.

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