CN201499097U

CN201499097U - Variable-frequency power source device capable of regulating rising speed of high-voltage wave form

Info

Publication number: CN201499097U
Application number: CN2009203070763U
Authority: CN
Inventors: 万望龙; 黄发富; 张建国
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-07-30
Filing date: 2009-07-30
Publication date: 2010-06-02
Anticipated expiration: 2019-07-30

Abstract

A variable-frequency power source device capable of regulating rising rate of high-voltage wave form comprises a frequency-modulation width modulation standard square wave source, a high-voltage regulating module, an IGBT high-voltage high-frequency chopped wave module, a protection circuit and a wave form rising speed regulating module, wherein the output end of the frequency-modulation width modulation standard square wave source is respectively connected with the input end of the high-voltage regulating module and the input end of the IGBT high-voltage high-frequency chopped wave module, the output end of the high-voltage regulating module is connected with the input end of the IGBT high-voltage high-frequency chopped wave module, the output end of the protection circuit is connected with the input end of the IGBT high-voltage high-frequency chopped wave module, the output end of the IGBT high-voltage high-frequency chopped wave module is connected with the input end of the wave form rising speed regulating module, and the output end of the wave form rising speed regulating module can output high voltage. The variable-frequency power source device has high stable performance, can regulate the wave form rising speed, is mainly used for corona resistance tests of enamel conductors of a variable-frequency motor and the turn-to-turn high-voltage tests of the variable-frequency motor, and can used as a pulse corona discharge plasma generating device for treating industrial waste gas.

Description

The adjustable frequency changing power device of a kind of HT waveform climbing speed

Technical field

The utility model relates to a kind of frequency changing power device, relates in particular to a kind of the variable-frequency motor anti-corona test of enamelled wire and adjustable frequency changing power device of HT waveform climbing speed of variable-frequency motor turn-to-turn withstand voltage test of being mainly used in.

Background technology

The market of variable-frequency motor is along with the energy-saving and emission-reduction scale enlarges day by day and enlarges.But the precipitous voltage of high frequency of frequency converter output causes the insulating barrier of variable-frequency motor to damage easily, useful life is short, therefore improve the anti-pulse voltage performance of variable-frequency motor enamelled wire (anti-corona enamelled wire) and the test withstand voltage, become the domestic and international research focus the turn-to-turn of variable-frequency motor.For the quality of the anti-corona enamelled wire of correct evaluation and the reasonability of the anti-corona enamelled wire of affirmation technological improvement, press for development electric pulse strength for insulation (withstand voltage) testing apparatus and to the turn-to-turn Withstand test device of variable-frequency motor, while is along with the reinforcement of environmental consciousness, processing requirements to industrial waste gas is more and more stricter, utilizes corona discharge pulse plasma for desulfurizing flue gas denitration technology smoke treatment to become the domestic and international research focus.

There is following defective in existing frequency changing power device: 1, climbing speed can not be less than 100ns; 2, electric pressure can not be higher than 4000V; 3, the band capacitance load capability is poor; 4, climbing speed can not be controlled; 5, stability is poor.

On the other hand, existing market common high voltage switch device IGBT or MOSFET device are owing to be subjected to the power device Effect on Performance, the IGBT module that does not have the high climbing speed of high pressure resistance high frequency rate in the market, the influence of self capacity, circuit inductance in addition, and circuit effects of distribution parameters, that the development voltage high speed rises, the high-repetition-rate square-wave generator is very difficult, technical difficulty is very big.

The utility model content

The purpose of this utility model is to overcome the above-mentioned defective that prior art exists, and a kind of the variable-frequency motor anti-corona test of enamelled wire and adjustable frequency changing power device of HT waveform climbing speed of variable-frequency motor turn-to-turn withstand voltage test of being mainly used in is provided.

The technical solution of the utility model is: by the standard square wave source of modulating frequency and width; be used to regulate the high pressure voltage regulating module of high pressure output; be used for high voltage direct current is become the IGBT high pressure copped wave module of bipolarity high-voltage square-wave; be used to protect the protective circuit of IGBT high voltagehigh frequency module; be used to regulate the waveform climbing speed adjustment module composition of output waveform climbing speed; the output of the standard square wave source of described modulating frequency and width is connected with the input of high pressure voltage regulating module and the input of IGBT high voltagehigh frequency copped wave module respectively; high pressure voltage regulating module output is connected with the input of IGBT high voltagehigh frequency copped wave module; the input of the output termination IGBT high voltagehigh frequency copped wave module of protective circuit, the output of IGBT high voltagehigh frequency copped wave module is connected with the input of waveform climbing speed adjustment module.

Described high pressure voltage regulating module is made of switching tube driver module, current rectifying and wave filtering circuit, HF switch pipe, high-frequency step-up transformer, high-voltage rectifier, high-pressure filter circuit, described rectification filter circuit output end is connected with HF switch pipe input with switching tube driver module output, HF switch pipe output is connected with the high-frequency step-up transformer input, the high-frequency step-up transformer output is connected with the high-voltage rectifier input, and the high-voltage rectifier output is connected with the high-pressure filter circuit input.

Described IGBT high voltagehigh frequency copped wave module adopts the module serial connection technology, IGBT high voltagehigh frequency copped wave module is in series by the IGBT high voltagehigh frequency chopper circuit plate of two functional parameter unanimities at least, every veneer is equivalent to an independently power supply, output voltage is 2000V, needs according to virtual voltage, a plurality of veneers can be together in series, make output voltage reach 10000V even higher.

The technology that described waveform climbing speed adjustment module adopts the band dummy load to regulate climbing speed, when doing variable-frequency motor with the anti-corona test of enamelled wire and the withstand voltage test of variable-frequency motor turn-to-turn, load is a capacitive, the size of load can influence the climbing speed of output waveform.During work,, select corresponding dummy load, switch in the corresponding dummy load, make the output voltage waveforms climbing speed reach set point by high-voltage relay according to the grade of the output waveform climbing speed of setting.

The utility model output voltage is adjustable continuously from 0V-10000V, and frequency is adjustable continuously from 0Hz--30KHz, and the voltage waveform climbing speed can be 100ns, 200ns, 300ns, 400ns, 500ns, can set output, and voltage duty cycle is adjustable continuously from 1%--99%.

Description of drawings

Fig. 1 is the block diagram of the utility model one embodiment;

Fig. 2 is the structure chart of high pressure voltage regulating module embodiment illustrated in fig. 1;

Fig. 3 is the circuit block diagram of IGBT high voltagehigh frequency copped wave module embodiment illustrated in fig. 1;

Fig. 4 is the circuit block diagram of waveform climbing speed adjustment module embodiment illustrated in fig. 1.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

With reference to Fig. 1; present embodiment is by the standard square wave source 1 of modulating frequency and width; high pressure voltage regulating module 2; IGBT high voltagehigh frequency copped wave module 3; protective circuit 4; waveform climbing speed adjustment module 5 is formed; the output of the standard square wave source 1 of modulating frequency and width is connected with the input of high pressure voltage regulating module 2 and the input of IGBT high voltagehigh frequency copped wave module 3 respectively; high pressure voltage regulating module 2 outputs are connected with the input of IGBT high voltagehigh frequency copped wave module 3; the input of 4 output termination IGBT high voltagehigh frequency copped wave modules 3 of protective circuit; the output of IGBT high voltagehigh frequency copped wave module 3 is connected with the input of waveform climbing speed adjustment module 5, and the output of waveform climbing speed adjustment module 5 is exported high pressure.

With reference to Fig. 2, high pressure voltage regulating module 2 is made of switching tube driver module U1, current rectifying and wave filtering circuit U2, HF switch pipe U3, high-frequency step-up transformer U4, high-voltage rectifier U5, high-pressure filter circuit U6, described current rectifying and wave filtering circuit U2 output is connected with HF switch pipe U3 input with switching tube driver module U1 output, HF switch pipe U3 output is connected with high-frequency step-up transformer U4 input, high-frequency step-up transformer U4 output is connected with high-voltage rectifier U5 input, and high-voltage rectifier U5 output is connected with high-pressure filter circuit U6 input.

With 220V electric main input rectifying filter circuit U2, after current rectifying and wave filtering circuit U2 rectification, filtering, form the 310V direct current, 310V direct current input HF switch pipe U3; Send the pwm signal of scalable output frequency and duty ratio by the switching tube driver module U1 of CPU control, this pwm signal is as drive signal input HF switch pipe U3; When output voltage range is between 0V-1000V, adopt the frequency of regulating pwm pulse to come control output voltage, make the voltage fluctuation amplitude stabilization in 1%; When output voltage was between 1000V-10000V, the duty of employing adjusting pwm pulse is control output voltage recently, makes the voltage fluctuation amplitude stabilization in 1%; HF switch pipe U3 is under the driving of switching tube driver module U1, carry out high-frequency switch motion, make the 310V direct current become the pulse voltage of high frequency, high-frequency electrical pulses is sent to the elementary of high-frequency step-up transformer U4, after high-frequency step-up transformer U4 boosts, from secondary output high-voltage pulse, become level and smooth high voltage direct current behind high-voltage pulse process high-voltage rectifier U5 and the high-pressure filter circuit U6, send into IGBT high voltagehigh frequency copped wave module 3.

With reference to Fig. 3, IGBT high voltagehigh frequency copped wave module 3 is by IGBT chopper circuit 3-1, IGBT chopper circuit 3-2, IGBT chopper circuit 3-3 ... the IGBT high voltagehigh frequency chopper circuit plate of functional parameter unanimities such as IGBT chopper circuit 3-n is composed in series; The cathode output end of described IGBT chopper circuit 3-1 connects the cathode output end of IGBT chopper circuit 3-2, the cathode output end of IGBT chopper circuit 3-2 connects the cathode output end of IGBT chopper circuit 3-3, connect the cathode output end output high-voltage bipolar square wave of IGBT chopper circuit 3-1 cathode output end and IGBT chopper circuit 3-n successively by this rule.

IGBT drive signal 21 is sent the pwm signal of corresponding frequencies according to output signal frequency and duty ratio, this pwm signal is imported IGBT chopper circuit 3-1 successively, IGBT chopper circuit 3-2, IGBT chopper circuit 3-3 ... IGBT chopper circuit 3-n, high voltage direct current 22 is added in IGBT chopper circuit 3-1, IGBT chopper circuit 3-2, IGBT chopper circuit 3-3 ... another input of IGBT chopper circuit 3-n, under the driving of pwm signal, the IGBT chopper circuit is to high voltage direct current 22 copped waves, IGBT chopper circuit output bipolar square wave, connection rule because of IGBT chopper circuit output, make output voltage obtain stack, thus the high pressure that output needs.

With reference to Fig. 4, waveform climbing speed adjustment module 5 is made up of high-voltage relay K1, K2, K3, K4, K5 and corresponding successively 100ns dummy load 5-1,200ns dummy load 5-2,300ns dummy load 5-3,400ns dummy load 5-4, the 500ns dummy load 5-5 of five parallel connections, and high-voltage relay K1, K2, K3, K4, K5 output meet 100ns dummy load 5-1,200ns dummy load 5-2,300ns dummy load 5-3,400ns dummy load 5-4,500ns dummy load 5-5 respectively.

Import the high-voltage relay K1 of waveform climbing speed adjustment module 5 from the high-voltage bipolar square-wave signal of IGBT high voltagehigh frequency copped wave module 3 outputs, K2, K3, K4, K5, according to the output HT waveform climbing speed of setting, select 100ns dummy load 5-1,200ns dummy load 5-2,300ns dummy load 5-3,400ns dummy load 5-4 or 500ns dummy load 5-5, the high-voltage relay closure of selected dummy load correspondence, after dummy load, the climbing speed of high-voltage bipolar square-wave signal to input, frequency, duty ratio is adjusted, and adjusted high-voltage bipolar square-wave signal is from the output output of waveform climbing speed adjustment module 5 selected dummy loads.

Claims

1. adjustable frequency changing power device of HT waveform climbing speed; it is characterized in that; standard square wave source by modulating frequency and width; the high pressure voltage regulating module; IGBT high voltagehigh frequency copped wave module; protective circuit; waveform climbing speed adjustment module is formed; the output of the standard square wave source of modulating frequency and width is connected with the input of high pressure voltage regulating module and the input of IGBT high voltagehigh frequency copped wave module respectively; high pressure voltage regulating module output is connected with the input of IGBT high voltagehigh frequency copped wave module; the input of the output termination IGBT high voltagehigh frequency copped wave module of protective circuit; the output of IGBT high voltagehigh frequency copped wave module is connected with the input of waveform climbing speed adjustment module, and the output of waveform climbing speed adjustment module is exported high pressure.

2. adjustable frequency changing power device of HT waveform climbing speed; it is characterized in that; standard square wave source by modulating frequency and width; the high pressure voltage regulating module; IGBT high voltagehigh frequency copped wave module; protective circuit; waveform climbing speed adjustment module is formed; the output of the standard square wave source of modulating frequency and width is connected with the input of high pressure voltage regulating module and the input of IGBT high voltagehigh frequency copped wave module respectively; high pressure voltage regulating module output is connected with the input of IGBT high voltagehigh frequency copped wave module; the input of the output termination IGBT high voltagehigh frequency copped wave module of protective circuit; the output of IGBT high voltagehigh frequency copped wave module is connected with the input of waveform climbing speed adjustment module, and the output of waveform climbing speed adjustment module is exported high pressure.

3. the adjustable frequency changing power device of HT waveform climbing speed according to claim 1 and 2 is characterized in that, IGBT high voltagehigh frequency copped wave module is in series by the IGBT high voltagehigh frequency chopper circuit plate of two functional parameter unanimities at least.

4. the adjustable frequency changing power device of HT waveform climbing speed according to claim 1 and 2, it is characterized in that, waveform climbing speed adjustment module is made up of high-voltage relay K1, K2, K3, K4, K5 and corresponding successively 100ns dummy load, 200ns dummy load, 300ns dummy load, 400ns dummy load, the 500ns dummy load of five parallel connections, and high-voltage relay K1, K2, K3, K4, K5 output connect 100ns dummy load, 200ns dummy load, 300ns dummy load, 400ns dummy load, 500ns dummy load respectively.