CN105717388A - Transformer test platform - Google Patents
Transformer test platform Download PDFInfo
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- CN105717388A CN105717388A CN201510902559.8A CN201510902559A CN105717388A CN 105717388 A CN105717388 A CN 105717388A CN 201510902559 A CN201510902559 A CN 201510902559A CN 105717388 A CN105717388 A CN 105717388A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention discloses a transformer test platform, and belongs to the technical field of electronic power and electronics. The transformer test platform disclosed by the invention is composed of a first AC/DC module, a DC/AC module, a transmission reactor and a second AC/DC module. The first AC/DC module converts external AC power into DC power, and DC voltages are adjustable; the DC/AC module converts the DC power into the AC power, and the AC power is connected with the primary winding of a transformer to be tested after passing through the transmission reactor; and after secondary-winding AC power of the transformer to be tested is output, the secondary-winding AC power is converted into AC power through the second AC/DC module for connection with the DC output side of the first AC/DC module. The test platform provided by the invention can conveniently adjust voltages, frequencies and currents of the transformer to be tested, is small in loss and is economical and environmental friendly.
Description
Technical field
The invention belongs to electric and electronic technical field, relate generally to a kind of transformer testing platform.
Background technology
Development along with power electronic products such as high power switching power supply, converter, photovoltaic DC-to-AC converter, electric power electric transformer, electric automobile charging piles, transformator (especially the high frequency transformer of 10-200KHz) is used widely, and its design is had higher requirement simultaneously.For this reason, it may be necessary to being customized of transformator is serviced according to (such as power, frequency, voltage, electric current etc.) under different condition, so the research and development test of transformator is brought very big challenge.
The conventional test methodologies of transformator is civil power to become the alternating current of assigned frequency after over commutation and inversion be added in the former limit of transformator, secondary connecting resistance load, there is following several respects shortcoming in it: 1, changes test electric current when test voltage is constant or when the constant change test voltage of test electric current, need switching load, complex operation；What 2, transformer secondary connect is ohmic load, and active loss is big, uneconomical.It is, therefore, desirable to provide a kind of new transformer testing platform is to overcome disadvantages mentioned above.
Summary of the invention
The present invention seeks to: for the deficiencies in the prior art, overcome the shortcoming that existing transformer testing is loaded down with trivial details and active loss is big, it is proposed to a kind of transformer testing platform.
Specifically, the present invention realizes by the following technical solutions: include an AC/DC module, DC/AC module, transmission reactance and the 2nd AC/DC module, wherein: external communication electricity is transformed to unidirectional current by an AC/DC module, and DC voltage amplitude is adjustable；The DC power conversion that oneth AC/DC module exports is alternating current by DC/AC module, is followed by the former limit in transformator to be measured through transmission reactance；Transformator to be measured secondary alternating current output after through the second AC/DC block transforms be the DC output side that unidirectional current is connected to an AC/DC module.
Form according to external communication electricity is different, and the AC/DC module in technique scheme can be further divided into following several form:
1) described external communication electricity is single-phase alternating current, a described AC/DC module includes single-phase voltage regulator, booster transformer and uncontrollable rectifier bridge, external communication electricity carries out uncontrollable rectifier by uncontrollable rectifier bridge after single-phase voltage regulator and booster transformer and becomes unidirectional current, and DC voltage amplitude regulates to rely on and regulates single-phase voltage regulator realization.
2) described external communication electricity is single-phase alternating current, a described AC/DC module is the single-phase full-controlled rectifier bridge circuit being made up of full-controlled device, external communication electricity is transformed to unidirectional current through single-phase full-controlled rectifier bridge circuit, and DC voltage amplitude regulates and relies on the turn-off time of opening controlling full-controlled device to realize.
3) described external communication electricity is three-phase alternating current, a described AC/DC module includes three-phase regulator, three-phase voltage increasing transformator and three-phase uncontrollable rectifier bridge, external communication electricity carries out three phase full bridge uncontrollable rectifier by three-phase uncontrollable rectifier bridge after three-phase regulator and three-phase voltage increasing transformator and becomes unidirectional current, and DC voltage amplitude regulates to rely on and regulates three-phase regulator realization.
4) described external communication electricity is three-phase alternating current, a described AC/DC module is the three-phase full-controlled rectifier bridge circuit being made up of full-controlled device, external communication electricity is transformed to unidirectional current after three-phase full-controlled rectifier bridge circuit, and DC voltage amplitude regulates and relies on the turn-off time of opening controlling full-controlled device to realize.
In technique scheme, the structure of described DC/AC module can be the inversion full-bridge being made up of full-controlled device, regulates the frequency of alternating current by controlling the switching frequency of full-controlled device.
In technique scheme, described transmission reactance induction reactance value scalable, plays the effect of energy storage energy and transmission energy in short-term.
In technique scheme, the structure of described 2nd AC/DC module can be the rectifying full bridge being made up of full-controlled device.
In technique scheme, described full-controlled device is IGBT or MOSFET or SiCMOSFET or GaNMOSFET.According to device property, when adopting IGBT device, transformator test platform test scope is generally 0-20KHz, and when adopting MOSFET or SiCMOSFET module or GaNMOSFET, the test of transformator test platform ranges for 0-200KHz.
Present invention includes the control method of above-mentioned transformer testing platform, described control method is phase-shifting full-bridge control method, by controlling the adjustment that the switching frequency of DC/AC module and the 2nd AC/DC module full-controlled device realizes the frequency of transformator input AC to be measured electricity, realize the adjustment of electric current or power by controlling the phase shift angle of DC/AC module and the 2nd AC/DC module.
Beneficial effects of the present invention is as follows: when transformator is tested by the transformer testing platform using the present invention, when test voltage is constant and change test electric current or when testing the constant change test voltage of electric current, can either directly through controlling DC/AC module and the realization of the 2nd AC/DC module, load need not be switched, simple to operate.Constituting power winding in test circuit, active loss is only small, saves electric energy, and regulates when test voltage, electric current and frequency easy to operate.
Accompanying drawing explanation
Fig. 1 is transformer testing plateform system block diagram.
Oneth AC/DC modular circuit topological diagram when Fig. 2 is biphase input.
Oneth AC/DC modular circuit topological diagram when Fig. 3 is three-phase input.
Fig. 4 is DC/AC module topology figure.
Fig. 5 is the 2nd AC/DC module topology figure.
Fig. 6 is end to end DC/DC changer.
Detailed description of the invention
Also with reference to accompanying drawing, the present invention is described in further detail below in conjunction with embodiment.
Embodiment one:
This embodiment system block diagram is such as shown in Fig. 1 (a).External single phase poaer supply connects the input of an AC/DC module, the outfan of the oneth AC/DC module is connected with the DC output end of the input of DC/AC module and the 2nd AC/DC module, outfan one end of DC/AC module is connected with the input side of tested transformator with through transmission reactance, and the input side of the 2nd AC/DC is connected with the outlet side of transformator.Wherein the positive voltage output end of the 2nd AC/DC module and an AC/DC module positive voltage output end be connected, the negative voltage outfan of the 2nd AC/DC module and an AC/DC module negative voltage outfan be connected.
Its method of operation is: external single-phase alternating current through an AC/DC module by convert alternating current be adjustable DC electricity, DC power conversion is the alternating current of assigned frequency through DC/AC module by this adjustable DC electricity, this alternating current receives tested transformer primary side through transmission reactance, the alternating current of tested transformer secondary output is the input side that unidirectional current receives DC/AC module through the 2nd AC/DC block transforms, and this side is again the outlet side of an AC/DC module.
A described AC/DC module, has two ways.First kind of way is as shown in Figure 2 (a) shows.The input of external single phase poaer supply order phase voltage regulator, the outfan of single-phase voltage regulator is connected with the input of booster transformer, the input of the single-phase uncontrollable rectifier full-bridge that the outfan of booster transformer forms with diode is connected, and uncontrollable rectifier full-bridge outfan is the outfan of an AC/DC module.Under this kind of mode, the output voltage of an AC/DC module relies on adjustment pressure regulator to be adjusted according to demand.
The second way of a described AC/DC module is such as shown in Fig. 2 (b).External single phase poaer supply receives the input of single-phase full-controlled rectifier bridge, and the outfan of single-phase full-controlled rectifier bridge is the outfan of an AC/DC module.Described single-phase full-controlled rectifier bridge is made up of four full-controlled device.Under this kind of mode, the output voltage of an AC/DC module relies on the dutycycle changing full-controlled device driving voltage to be adjusted.
Described DC/AC module is the inversion full-bridge being made up of four full-controlled device, as shown in Figure 4.This module is by DC power conversion for specifying alternating current, and its output one end is connected with one end of transmission reactance, and the other end is connected with one end, former limit of transformator.The frequency of output AC electricity is regulated by controlling the switching frequency of full-controlled device.
Described transmission reactance induction reactance value scalable, stores energy in short-term, plays the effect of transmission energy, and its one end is connected with the outfan of DC/AC, and one end is connected with one end of tested transformer primary side.
Described 2nd AC/DC module is the rectifying full bridge of full-controlled device composition, as shown in Figure 5.Two terminals of transformer secondary are surveyed in the input side reception of this module, and it exports side joint the oneth AC/DC module outfan, the i.e. input of DC/AC module.Wherein, the output cathode of the 2nd AC/DC module and the positive pole of an AC/DC module are connected, and the output negative pole of the 2nd AC/DC module and the negative pole of an AC/DC module are connected.
Described DC/AC module, transmission reactance, tested transformator, the 2nd AC/DC module form end to end two-way DC/DC changer, as shown in Figure 6.Adopt phase-shifting full-bridge control method that it is controlled, by controlling the adjustment that the switching frequency of DC/AC module and the 2nd AC/DC module full-controlled device realizes the frequency of transformator input AC to be measured electricity, realize the adjustment of electric current or power by controlling the phase shift angle of DC/AC module and the 2nd AC/DC module.
Described full-controlled device is IGBT or MOSFET or SiCMOSFET module or GaNMOSFET.According to device property, when adopting IGBT device, transformator test platform test scope is generally 0-20KHz, and when adopting MOSFET or SiCMOSFET module or GaNMOSFET, the test of transformator test platform ranges for 0-200KHz.
Embodiment two:
This embodiment system block diagram is such as shown in Fig. 3 (a).External three phase mains connects the input of an AC/DC module, the outfan of the oneth AC/DC module is connected with the DC output end of the input of DC/AC module and the 2nd AC/DC module, outfan one end of DC/AC module is connected with the input side of tested transformator with through transmission reactance, and the input side of the 2nd AC/DC is connected with the outlet side of transformator.Wherein the positive voltage output end of the 2nd AC/DC module and an AC/DC module positive voltage output end be connected, the negative voltage outfan of the 2nd AC/DC module and an AC/DC module negative voltage outfan be connected.
Its method of operation is: external three-phase alternating current through an AC/DC module by convert alternating current be adjustable DC electricity, DC power conversion is assigned frequency alternating current through DC/AC module by this adjustable DC electricity, this alternating current receives tested transformer primary side through transmission reactance, the alternating current of tested transformer secondary output is the input side that unidirectional current receives DC/AC module through the 2nd AC/DC block transforms, and this side is again the outlet side of an AC/DC module.
A described AC/DC module, has two ways.First kind of way is such as shown in Fig. 3 (a).External three phase mains connects three inputs connecting pressure regulator, the outfan of three-phase regulator is connected with the input of three-phase voltage increasing transformator, the input of the three-phase uncontrollable rectifier full-bridge that the outfan of three-phase voltage increasing transformator forms with diode is connected, and three-phase uncontrollable rectifier full-bridge outfan is the outfan of an AC/DC module.Under this kind of mode, the output voltage of an AC/DC module relies on adjustment three-phase regulator to be adjusted according to demand.
The second way of a described AC/DC module is as shown in Figure 3 (b).External three phase mains receives the input of three-phase full-controlled rectifier bridge, and the outfan of three-phase full-controlled rectifier bridge is the outfan of an AC/DC module.Described three-phase full-controlled rectifier bridge is made up of six full-controlled device, selects IGBT or MOSFET.Under this kind of mode, the output voltage of an AC/DC module relies on the dutycycle changing full-controlled device driving voltage to be adjusted.
Outside upper, the DC/AC module of embodiment two, transmission reactance, the 2nd AC/DC module and control mode thereof are all essentially identical with embodiment one, therefore repeat no more.
Although the present invention is with preferred embodiment openly as above, but embodiment is not for limiting the present invention's.Without departing from the spirit and scope of the invention, any equivalence done changes or retouching, also belongs to the protection domain of the present invention.Therefore the content that protection scope of the present invention should define with claims hereof is for standard.
Claims (10)
1. a transformer testing platform, it is characterised in that: include an AC/DC module, DC/AC module, transmission reactance and the 2nd AC/DC module, wherein: external communication electricity is transformed to unidirectional current by an AC/DC module, and DC voltage amplitude is adjustable；The DC power conversion that oneth AC/DC module exports is alternating current by DC/AC module, is followed by the former limit in transformator to be measured through transmission reactance；Transformator to be measured secondary alternating current output after through the second AC/DC block transforms be the DC output side that unidirectional current is connected to an AC/DC module.
2. transformer testing platform according to claim 1, it is characterized in that: described external communication electricity is single-phase alternating current, a described AC/DC module includes single-phase voltage regulator, booster transformer and uncontrollable rectifier bridge, external communication electricity carries out uncontrollable rectifier by uncontrollable rectifier bridge after single-phase voltage regulator and booster transformer and becomes unidirectional current, and DC voltage amplitude regulates to rely on and regulates single-phase voltage regulator realization.
3. transformer testing platform according to claim 1, it is characterized in that: described external communication electricity is single-phase alternating current, a described AC/DC module is the single-phase full-controlled rectifier bridge circuit being made up of full-controlled device, external communication electricity is transformed to unidirectional current through single-phase full-controlled rectifier bridge circuit, and DC voltage amplitude regulates and relies on the turn-off time of opening controlling full-controlled device to realize.
4. transformer testing platform according to claim 1, it is characterized in that: described external communication electricity is three-phase alternating current, a described AC/DC module includes three-phase regulator, three-phase voltage increasing transformator and three-phase uncontrollable rectifier bridge, external communication electricity carries out three phase full bridge uncontrollable rectifier by three-phase uncontrollable rectifier bridge after three-phase regulator and three-phase voltage increasing transformator and becomes unidirectional current, and DC voltage amplitude regulates to rely on and regulates three-phase regulator realization.
5. transformer testing platform according to claim 1, it is characterized in that: described external communication electricity is three-phase alternating current, a described AC/DC module is the three-phase full-controlled rectifier bridge circuit being made up of full-controlled device, external communication electricity is transformed to unidirectional current after three-phase full-controlled rectifier bridge circuit, and DC voltage amplitude regulates and relies on the turn-off time of opening controlling full-controlled device to realize.
6. transformer testing platform according to claim 1, it is characterised in that: the structure of described DC/AC module is the inversion full-bridge being made up of full-controlled device, regulates the frequency of alternating current by controlling the switching frequency of full-controlled device.
7. transformer testing platform according to claim 1, it is characterised in that: described transmission reactance induction reactance value scalable.
8. transformer testing platform according to claim 6, it is characterised in that: the structure of described 2nd AC/DC module is the rectifying full bridge being made up of full-controlled device.
9. the transformer testing platform according to claim 3,5,6 or 8, it is characterised in that: described full-controlled device is IGBT or MOSFET or SiCMOSFET or GaNMOSFET.
10. the control method being applicable to transformer testing platform as claimed in claim 8, it is characterized in that: described control method is phase-shifting full-bridge control method, by controlling the adjustment that the switching frequency of DC/AC module and the 2nd AC/DC module full-controlled device realizes the frequency of transformator input AC to be measured electricity, realize the adjustment of electric current or power by controlling the phase shift angle of DC/AC module and the 2nd AC/DC module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510902559.8A CN105717388A (en) | 2015-12-08 | 2015-12-08 | Transformer test platform |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510902559.8A CN105717388A (en) | 2015-12-08 | 2015-12-08 | Transformer test platform |
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| CN105717388A true CN105717388A (en) | 2016-06-29 |
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| CN201510902559.8A Pending CN105717388A (en) | 2015-12-08 | 2015-12-08 | Transformer test platform |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109116166A (en) * | 2018-07-26 | 2019-01-01 | 国网山东省电力公司莱芜供电公司 | It is a kind of to utilize charging pile broadband output aptitude tests transformer winding system and method |
| CN113567877A (en) * | 2021-06-09 | 2021-10-29 | 国电南瑞科技股份有限公司 | ISOP type direct current transformer power module test circuit and test method |
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| CN203658508U (en) * | 2014-01-27 | 2014-06-18 | 重庆梅安森科技股份有限公司 | Transformer safety test system |
| CN104375039A (en) * | 2014-11-21 | 2015-02-25 | 华北电力大学（保定） | Testing system for isolation type direct-current transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109116166A (en) * | 2018-07-26 | 2019-01-01 | 国网山东省电力公司莱芜供电公司 | It is a kind of to utilize charging pile broadband output aptitude tests transformer winding system and method |
| CN113567877A (en) * | 2021-06-09 | 2021-10-29 | 国电南瑞科技股份有限公司 | ISOP type direct current transformer power module test circuit and test method |
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