CN103513136A - Transformer transmission characteristic test device and method - Google Patents
Transformer transmission characteristic test device and method Download PDFInfo
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- CN103513136A CN103513136A CN201310479506.0A CN201310479506A CN103513136A CN 103513136 A CN103513136 A CN 103513136A CN 201310479506 A CN201310479506 A CN 201310479506A CN 103513136 A CN103513136 A CN 103513136A
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Abstract
The invention relates to transformer transmission characteristic test device and method. The test device comprises a single-phase alternating current voltage regulator (1), a single-phase full bridge uncontrolled rectification circuit (2), a filter capacitor (3), a single-phase full bridge inverter (4), a PWM pulse width modulator circuit (5), a blocking capacitor (6) and a sectional adjustable inductor (7). A tested transformer is connected in series with a loop which is composed of the blocking capacitor (6) and the sectional adjustable inductor (7). By using the relationship between the resonant frequency decided by distribution parameters of the sectional adjustable inductor (7) and the tested transformer and the operating frequency of the single-phase full bridge inverter, sine of 1kHz to 50kHz, square wave and sine distortion waveform are continuously acquired in primary and secondary sections of the transformer. The device and the method can be used for the transmission characteristic test of the high-frequency and high-voltage transformer.
Description
Technical field
The present invention relates to a kind of high-frequency transformer transfer characteristic test device and method, particularly proving installation and the method for testing of high-frequency high-voltage source domain high frequency high voltage transformer transport property.
Background technology
High frequency high voltage transformer is the important component part in high-frequency and high-voltage power supply, follow the development of high-frequency high-voltage source technology and the expansion of application, the frequency of operation of high frequency high voltage transformer, output voltage, output power are more and more higher, cause parasitism and the distribution parameter of transformer to be more and more subject to the impacts such as magnetic core, winding material, transformer device structure parameter, wire winding, and directly affect design and the performance of high-frequency and high-voltage power supply, so high frequency high voltage transformer transport property is one of technical parameter more and more receiving publicity.
In patent 201220325692.3, integrated testing instrument for transformer comprises three-phase dc resistance meter, no-load voltage ratio tester, has a year comprehensive tester, by pilot relay switching mode, is automatically controlled three-phase dc resistance meter, no-load voltage ratio tester, had the switching of carrying comprehensive tester function, integration function; Utility model 201220298644.X discloses a kind of high-power high-frequency transformer test macro, and frequency of operation is 5～50kHz, and this system is directly connected to test transformer by inverter output, test macro output waveform is not controlled; Patent 200910181695.7 discloses a kind of calibration device for comprehensive parameter tester of transformer, for Industrial Frequency Transformer multiparameter, measures, and only discloses test function module, to the unexposed explanation of concrete method of testing adopting; Patent 201020195530.3 discloses a kind of comprehensive testing device for transformer, integrated no-load transformer loading tester, no-load voltage ratio group tester, three kinds of separate unit instruments of instrument for measuring DC resistance have been carried out structural integrated, be mainly used in the test of Industrial Frequency Transformer.
Summary of the invention
The object of the invention is to propose a kind of transformer transfer characteristic test device and method, coordinate tested transformer at transformer input side winding, to produce sinusoidal voltage, the current signal of square wave voltage signal, sinusoidal voltage, current signal and the distortion in various degree of different frequency, for the test of transformer transport property.
The present invention includes 7 ingredients: single phase ac regulation device, single-phase full bridge be control rectifying circuit, filter capacitor, single-phase full-bridge inverter, PWM pulse-width modulation circuit, capacitance not, and sectional type controllable impedance.Two input ends of single phase ac regulation device connect respectively 220V alternating current fire wire and zero line, two output terminals of single phase ac regulation device connect not two ac input ends of control rectifying circuit of single-phase full bridge, single-phase full bridge is the positive pole of control rectifying circuit output high pressure termination filter capacitor not, single-phase full bridge is the negative pole of control rectifying circuit output low pressure termination filter capacitor not, it is anodal that the positive pole of filter capacitor connects single-phase full-bridge inverter bus, and the negative pole of filter capacitor connects single-phase full-bridge inverter bus negative pole; After output one end series connection capacitance of single-phase full-bridge inverter and sectional type controllable impedance, accept examination Transformer Winding one end, the other end of single-phase full-bridge inverter output is accepted the other end of examination Transformer Winding.PWM pulse-width modulation circuit connects single-phase full-bridge inverter drive end as single-phase full-bridge inverter driving circuit, after capacitance and sectional type controllable impedance, tested transformer income side windings in series, connects single-phase full-bridge inverter output terminal.By regulating the voltage-regulation swing handle of single phase ac regulation device adjustable through single-phase full bridge not control rectifying circuit rectification and the filtered DC voltage of filter capacitor, it is adjustable that the DC voltage of filter capacitor output realizes 0～300V.Single-phase full-bridge inverter adopts 4 high frequency gate-controlled switch devices and 4 high-frequency diodes to form, and the frequency of high frequency switching device and high-frequency diode should be able to meet the requirement of tested transformer testing frequency.In the present invention, device to test frequency is 1kHz～50kHz, therefore adopts IGBT module as gate-controlled switch device, and the parasitic anti-paralleled diode existing of IGBT inside modules is used as the high-frequency diode of full-bridge inverter; The PWM ripple signal that PWM pulse-width modulation circuit output frequency is controlled, after Amplification and insulation, give single-phase full-bridge inverter gate-controlled switch device, the inverter voltage signal of controlling single-phase full-bridge inverter output same frequency, this frequency is called frequency of operation, and in the present invention, frequency of operation is 1kHz～50kHz.The generation of PWM pulse-width modulation circuit PWM ripple can realize by analog or digital circuit, and the present invention adopts PWM pulse width modulator UG3525 to coordinate IGBT drive plate to realize; Capacitance is high frequency capacitance, and capacity need, much larger than tested transformer distributed capacitance value, generally be greater than 1uF; Sectional type controllable impedance can be divided into multistage, and its minimum value is 0uH, the minimum test frequency of its maximal value view apparatus and determining.
A winding of tested transformer connects the output terminal of single-phase full-bridge inverter with capacitance, sectional type controllable impedance after connecting, the winding of tested transformer access proving installation is called to input side winding, and another winding of tested transformer is called output side winding.Sectional type controllable impedance and tested transformer distribution parameter, be mainly distributed capacitance, has a tuning-points, is called resonance frequency, and the capacity of capacitance, much larger than tested transformer distribution parameter, is generally greater than 1uF and just can produce a very large impact resonant parameter.When single-phase full-bridge inverter frequency of operation is approximately equal to resonance frequency, the voltage of tested transformer input side, current waveform near sinusoidal ripple, the voltage and current waveform by test input side winding and output side winding can calculate tested transformer voltage, current transmission characteristic.Regulate single-phase full-bridge inverter frequency of operation, adjustable tested transformer input side winding voltage, current waveform and frequency, draw transformer voltage, current transmission characteristic under different frequency and waveform.When regulating frequency of operation away from resonance frequency, voltage, the current waveform of tested transformer input side distort, and therefore can test the transport property of transformer under different distortion input signals.When regulating single-phase full-bridge inverter frequency of operation still cannot obtain sinusoidal waveform at tested transformer input side winding two ends, adjustable sectional type controllable impedance, make equal or be approximately equal to target detection frequency by sectional type controllable impedance and the definite resonance frequency of tested transformer distribution parameter, single-phase full-bridge inverter frequency of operation is also adjusted to target detection frequency, can obtains sinusoidal waveform at tested transformer input side winding.Segmentation controllable impedance value is 0 o'clock, and tested transformer input side winding voltage waveform is square wave, and square wave frequency equals single-phase full-bridge inverter frequency of operation.When tested transformer input terminal voltage or current amplitude is excessive or when too small, regulate single phase ac regulation device voltage-regulation swing handle, regulate DC voltage size on filter capacitor, can change its tested transformer input terminal voltage or current amplitude.
The present invention adopts the method for testing of described transformer transfer characteristic test device, utilization is produced 1kHz～50kHz sinusoidal waveform, the sinusoidal distorted waveform of standard by the relation of sectional type controllable impedance and the definite resonance frequency of tested transformer distribution parameter and single-phase full-bridge inverter frequency of operation, carry out the measuring transmission loss under transformer 1kHz～50kHz sinusoidal signal, the excitation of sinusoidal distorted signal.When the sectional type controllable impedance in apparatus of the present invention is 0uH, can produce high frequency square wave voltage signal at tested transformer input side, for the lower measuring transmission loss of transformer high frequency square wave voltage signal excitation.
Good effect of the present invention is:
1. the definite resonance frequency of the sectional type controllable impedance in use device and tested transformer distribution parameter and the relation of single-phase full-bridge inverter frequency of operation, produce the voltage waveform of different wave and frequency, for testing the voltage-transfer characteristic of high-frequency transformer.
2. the definite resonance frequency of the sectional type controllable impedance in use device and tested transformer distribution parameter and the relation of single-phase full-bridge inverter frequency of operation, produce the current waveform of different wave and frequency, for testing the current transmission characteristic of high-frequency transformer.
3. adopt sectional type harmonic inductance, the resonant frequency range that in expanding unit, inductance and transformer distribution parameter produce, the effectively transport property under the excitation of measuring transformer different frequency signals.
Accompanying drawing explanation
Fig. 1 is topological structure block diagram of the present invention, in figure: 1 single phase ac regulation device, 2 single-phase full bridges are control rectifying circuit not, 3 filter capacitors, 4 single-phase full-bridge inverters, 5PWM pulse-width modulation circuit, 6 capacitances, 7 sectional type controllable impedances.
Embodiment
Below in conjunction with the drawings and the specific embodiments, describe the present invention in detail.
As shown in Figure 1: the present invention includes single phase ac regulation device 1, single-phase full bridge is control rectifying circuit 2 not, filter capacitor 3, single-phase full-bridge inverter 4, PWM pulse-width modulation circuit 5, capacitance 6 and sectional type controllable impedance 7.Two input ends of single phase ac regulation device 1 connect respectively 220V alternating current fire wire and zero line, 1 two output terminals of single phase ac regulation device connect not two ac input ends of control rectifying circuit 2 of single-phase full bridge, single-phase full bridge is the positive pole of control rectifying circuit 2 output high pressure termination filter capacitors 3 not, single-phase full bridge is the negative pole of control rectifying circuit 2 output low pressure termination filter capacitors 3 not, it is anodal that the positive pole of filter capacitor 3 connects single-phase full-bridge inverter 4 buses, filter capacitor 3 negative poles connect single-phase full-bridge inverter 4 bus negative poles, output one end series connection capacitance 6 of single-phase full-bridge inverter 4 and the rear acceptance examination of sectional type controllable impedance 7 Transformer Winding one end, the other end of single-phase full-bridge inverter 4 outputs is accepted the other end of examination Transformer Winding.
The proving installation that the present invention is concrete implements to take 1kW is example.Single phase ac regulation device 1 adopts 2kW single phase ac regulation device, range of adjustment is 0～220V, single-phase full bridge not control rectifying circuit 2 adopts the 30A/1200V of Xi Menkang company rectifier bridge, filter capacitor 3 adopts 1100uF/450V electrochemical capacitor, single-phase full-bridge inverter 4 adopts the F4-50R12KS4IGBT of company of Infineon, PWM pulse-width modulation circuit 5 adopts UG3252 to produce and frequency adjustment chip as PWM ripple, the UG3252 output Jie Luomu source DA962D4 of company driving circuit, capacitance 6 adopts 1uF/3000V high frequency capacitance, sectional type controllable impedance 7 putting-out systems are done, every section of inductance is 0, 107uH, 543uH, 1.2mH, 2.6mH, 5.4mH, 11mH, 30mH.
The course of work of the present invention is as described below: by tested transformer series connection access resonant circuit, as shown in Figure 1, sectional type controllable impedance can at will be selected one grade of inductance value; For PWM pulse-width modulation circuit 5 normal power supplies; Single phase ac regulation device 1 input termination 220V alternating current; Adopt 2 cover voltages, testing current probe, measure respectively tested transformer input side winding voltage, electric current and output side winding voltage, electric current, voltage, current probe are connected to oscillograph.First mix up voltage, current probe and oscillograph setting, start PWM pulse-width modulation circuit 5 power supplies, and regulate PWM pulse-width modulation circuit 5 to target detection frequency, slowly regulate single phase ac regulation device voltage-regulation swing handle to measure voltage at transformer input side and outgoing side, current waveform, when waveform is undesirable, power-supply system power-off also regulates sectional type controllable impedance to other segmentations until waveform is desirable, obtain after ideal waveform, continuing to regulate single phase ac regulation device voltage-regulation swing handle is adjustable tested transformer input side and output side winding voltage, current amplitude, until satisfied.Tested transformer input side winding voltage, current waveform are determined by the relativeness of frequency of operation and resonance frequency, when frequency of operation equals resonance frequency or near resonance frequency time, tested transformer input side winding voltage, current waveform are sinusoidal wave, when frequency of operation off-resonance frequency is far away, tested transformer input side winding voltage, current waveform distort, become non-type other waveforms, when resonant inductance is 0, tested transformer input side winding voltage waveform is square wave.Obtain after tested transformer input side and output side winding voltage, current waveform, can as required, calculate voltage, the current transmission characteristic of transformer.
The present invention is for high frequency high voltage transformer measuring transmission loss, in invention, adopt high voltage, large electric current to carry out measuring transmission loss to transformer, simultaneously because circuit structure is simple, it is convenient to control, can produce as required the test waveform of different amplitudes and frequency, can be more accurately, the transport property of real calculating transformer.
Claims (4)
1. a transformer transfer characteristic test device, it is characterized in that, described proving installation comprises single phase ac regulation device (1), single-phase full bridge is control rectifying circuit (2) not, filter capacitor (3), single-phase full-bridge inverter (4), PWM pulse-width modulation circuit (5), capacitance (6) and sectional type controllable impedance (7), two input ends of single phase ac regulation device (1) connect respectively 220V alternating current fire wire and zero line, (1) two output terminal of single phase ac regulation device connects not two ac input ends of control rectifying circuit (2) of single-phase full bridge, single-phase full bridge is the positive pole of control rectifying circuit (2) output high pressure termination filter capacitor (3) not, single-phase full bridge is the negative pole of control rectifying circuit (2) output low pressure termination filter capacitor (3) not, it is anodal that the positive pole of filter capacitor (3) connects single-phase full-bridge inverter (4) bus, filter capacitor (3) negative pole connects single-phase full-bridge inverter (4) bus negative pole, after output one end series connection capacitance (6) of single-phase full-bridge inverter (4) and sectional type controllable impedance (7), accept wherein one end of examination transformer input side winding, the other end of single-phase full-bridge inverter (4) output is accepted the other end of examination transformer input side winding.
2. adopt the method for testing of transformer transfer characteristic test device claimed in claim 1, it is characterized in that, described method is by regulating the inductance value of single-phase full-bridge inverter frequency of operation and sectional type controllable impedance, the pass of the resonance frequency of utilizing single-phase full-bridge inverter frequency of operation and being determined by sectional type controllable impedance (7) and tested transformer distribution parameter ties up to tested Transformer Winding input end and produces 1kHz～50kHz high frequency sine, square wave, sinusoidal distorted waveform, by testing the voltage of tested transformer input side winding and tested transformer output side winding, it is sinusoidal that the mode of current waveform is carried out transformer 1kHz～50kHz, square wave, measuring transmission loss under sinusoidal distortion pumping signal.
3. transformer measuring transmission loss method according to claim 2, it is characterized in that, when described single-phase full-bridge inverter frequency of operation equals by sectional type controllable impedance and the definite resonance frequency of tested transformer distribution parameter, the voltage of tested transformer input side, current waveform are sinusoidal wave, by testing the voltage and current waveshape of tested transformer input side and output side winding, go out voltage, the current transmission characteristic of transformer under sinusoidal excitation; When regulating single-phase full-bridge inverter frequency of operation near resonance frequency time, tested transformer input side voltage, current waveform near sinusoidal ripple, can calculate transformer voltage, the current transmission characteristic under near sinusoidal waveform by testing the voltage and current waveform of tested transformer input side and output side winding; When regulating single-phase full-bridge inverter frequency of operation away from resonance frequency, tested transformer input side voltage, current waveform distort, and can test voltage, the current transmission characteristic of transformer under distortion sinusoidal input signal; When regulating single-phase full-bridge inverter frequency of operation still cannot obtain sinusoidal waveform at tested transformer input side winding two ends, regulate sectional type controllable impedance, make equal or be approximately equal to target detection frequency by sectional type controllable impedance and the definite resonance frequency of tested transformer distribution parameter, single-phase full-bridge inverter frequency of operation is also adjusted to target detection frequency, at tested transformer input side winding, obtains sinusoidal waveform; Segmentation controllable impedance value is 0 o'clock, tested transformer input side winding voltage waveform is square wave, square wave frequency equals single-phase full-bridge inverter frequency of operation, its frequency range is frequency of operation 1kHz～50kHz scope of device, can test voltage, the current transmission characteristic of tested transformer under 1kHz～50kHz square-wave input signal; When tested transformer input terminal voltage or current amplitude is excessive or when too small, regulate single phase ac regulation device voltage-regulation swing handle, regulate DC voltage size on filter capacitor, just change tested transformer input terminal voltage or current amplitude.
4. transformer measuring transmission loss method according to claim 2, is characterized in that, described method can realize the test of transformer 1kHz～50kHz segmentation cline frequency; By changing the switching device adopting in single-phase full-bridge inverter in transformer transfer characteristic test device, improve single-phase full-bridge inverter frequency of operation, the segmentation of the low inductance value section of refinement sectional type adjustable electric, can test the transformer transport property under higher frequency simultaneously; By increasing sectional type controllable impedance value, can measure the transport property of transformer under low frequency more.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201917A (en) * | 2014-05-05 | 2014-12-10 | 周细文 | Voltage-adjustable mixed-frequency voltage source |
| CN104215889A (en) * | 2014-09-17 | 2014-12-17 | 中国科学院电工研究所 | High-frequency insulation withstand voltage tester |
| CN104764953A (en) * | 2015-03-20 | 2015-07-08 | 保定市暄威电力设备科技有限公司 | Testing method, device and system for transformer winding |
| CN105717388A (en) * | 2015-12-08 | 2016-06-29 | 国家电网公司 | Transformer test platform |
| CN106526330A (en) * | 2016-12-30 | 2017-03-22 | 贵州电网有限责任公司电力科学研究院 | Portable impact current generator for measuring impact ground resistance |
| CN110907781A (en) * | 2019-12-30 | 2020-03-24 | 华北电力大学 | High-frequency transformer insulation test system and use method thereof |
| CN112731084A (en) * | 2020-12-28 | 2021-04-30 | 北京深思数盾科技股份有限公司 | Transformer testing device and testing method |
| CN118337183A (en) * | 2024-06-13 | 2024-07-12 | 武汉船舶通信研究所(中国船舶集团有限公司第七二二研究所) | Virtual capacitor series tuning device suitable for low-frequency electromagnetic emission system |
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Patent Citations (5)
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| JPH08162265A (en) * | 1994-12-08 | 1996-06-21 | Matsushita Electric Ind Co Ltd | Inverter circuit |
| CN2733371Y (en) * | 2004-08-23 | 2005-10-12 | 特变电工股份有限公司 | An apparatus for testing transformer |
| US20070297200A1 (en) * | 2006-06-23 | 2007-12-27 | Alstom Technology Ltd. | Power supply for electrostatic precipitator |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201917A (en) * | 2014-05-05 | 2014-12-10 | 周细文 | Voltage-adjustable mixed-frequency voltage source |
| CN104215889A (en) * | 2014-09-17 | 2014-12-17 | 中国科学院电工研究所 | High-frequency insulation withstand voltage tester |
| CN104764953A (en) * | 2015-03-20 | 2015-07-08 | 保定市暄威电力设备科技有限公司 | Testing method, device and system for transformer winding |
| CN105717388A (en) * | 2015-12-08 | 2016-06-29 | 国家电网公司 | Transformer test platform |
| CN106526330A (en) * | 2016-12-30 | 2017-03-22 | 贵州电网有限责任公司电力科学研究院 | Portable impact current generator for measuring impact ground resistance |
| CN110907781A (en) * | 2019-12-30 | 2020-03-24 | 华北电力大学 | High-frequency transformer insulation test system and use method thereof |
| CN110907781B (en) * | 2019-12-30 | 2021-01-05 | 华北电力大学 | High-frequency transformer insulation test system and use method thereof |
| CN112731084A (en) * | 2020-12-28 | 2021-04-30 | 北京深思数盾科技股份有限公司 | Transformer testing device and testing method |
| CN118337183A (en) * | 2024-06-13 | 2024-07-12 | 武汉船舶通信研究所(中国船舶集团有限公司第七二二研究所) | Virtual capacitor series tuning device suitable for low-frequency electromagnetic emission system |
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