CN201145713Y - Experimental device for frequency conversion controller - Google Patents
Experimental device for frequency conversion controller Download PDFInfo
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- CN201145713Y CN201145713Y CNU2007201600357U CN200720160035U CN201145713Y CN 201145713 Y CN201145713 Y CN 201145713Y CN U2007201600357 U CNU2007201600357 U CN U2007201600357U CN 200720160035 U CN200720160035 U CN 200720160035U CN 201145713 Y CN201145713 Y CN 201145713Y
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Abstract
The utility model discloses a testing device used for a frequency conversion controller, comprising a power supply input port, a transmission gate circuit, a load port and a plurality of sets of load circuits which consist of a resistor and an inductor connected in series and are connected between the transmission gate circuit and the load port, wherein, the plurality of sets of load circuits are respectively connected with a plurality of sets of switch paths of the transmission gate circuit in one-to-one correspondence, and the plurality of sets of load circuits are connected in parallel with one another by the switch paths. The testing device simulates the electric machinery load driven by the frequency conversion controller by the combination of a power resistor and a high power electric induction coil and the logic control, tests the loading ability of the frequency conversion controller, and has the obvious advantages of strong commonality, high security, concise load property adjustment and reliability, etc.
Description
Technical field
The utility model relates to a kind of test unit, specifically, relates to a kind of test unit that detects the frequency-variable controller operation conditions.
Background technology
Frequency-variable controller is as the core devices of present AC and DC transducer air conditioning, and its reliability of operation directly affects the performance quality of whole air conditioner.But present band for frequency-variable controller carries fail-test and lacks a kind of general, safe inductive load device.When carrying out the frequency-variable controller fail-test, must be with controller and refrigeration system on-line debugging, not only testing cost height, versatility are low, and can't quantitatively control accurately for all kinds of conditions of work of frequency-variable controller operation, thereby cause test findings not ideal enough.
The utility model content
The frequency-variable controller test unit that the purpose of this utility model is to provide a kind of and has strong versatility, load characteristic is adjustable, be easy to control, not only can the load of simulated machine class, and load characteristic is adjustable, can satisfy the requirement of operational factor to external world of all kinds of frequency-variable controllers.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of test unit that is used for frequency-variable controller comprises power input mouth, gating circuit, load port and is connected many groups of load circuits that are in series by resistance and inductance between described gating circuit and the load port; Wherein, described many group load circuits connect one to one with many groups switch ways of gating circuit respectively, and parallel with one another by described switch ways.
Further, described load port is the threephase load port, all includes three load branch that are in series by resistance and inductance in each group load circuit, connects one to one by connected switch ways and described threephase load port respectively.
For the three-phase alternating voltage to input detects, on described threephase load port, be connected with the phase voltage testing circuit, specifically can adopt the mode that between every two-phase load port, connects voltage table to realize.
Further again, described power input mouth is the single phase alternating current power supply input port, connects live wire and zero line respectively.
Then can adopt following two kinds of concrete syndetons for described gating circuit:
A kind ofly be, at gating circuit the multichannel A.C. contactor is set, its coil one end connects zero line, and the other end connects live wire by one road hand switch separately, and the normal open switch of described A.C. contactor is connected in the described load branch as the switch ways of described gating circuit.Like this, by closed one the tunnel or the multichannel hand switch, be connected on the threephase load port after can realizing being connected to one group of load circuit on the threephase load port or will organizing the load circuit parallel connection more, and then change the load characteristic of frequency-variable controller to be measured.
Another kind is, multichannel A.C. contactor and multicircuit relay are set in described gating circuit, coil one end of described A.C. contactor connects zero line, the other end respectively with the corresponding connection of a certain road normally opened contact of multicircuit relay, the normal open switch of described A.C. contactor is connected in the described load branch as the switch ways of described gating circuit; The coil of described multicircuit relay is connected in the direct current power supply loop by one road hand switch separately, its normally opened contact select one the tunnel or multichannel be connected between the coil of live wire and A.C. contactor.Like this, by selecting wherein one road hand switch closure, and then wherein No. one relay adhesive of control, it is connected normally opened contact number difference between live wire and the ac contactor coil to utilize different relays, and then realize being connected on the threephase load port with one group of load circuit or after will organizing the load circuit parallel connection, to reach the purpose of the load characteristic that changes frequency-variable controller to be measured. more
In order to realize the data communication between described test unit and the frequency-variable controller to be measured, in described test unit, also be provided with a control module and a PORT COM, the communication interface of described control module connects described PORT COM through signal transmssion line, and then is connected communication with the frequency-variable controller to be measured of outside.
Further again, on described test unit, also be provided with output port of power source, be used for to frequency-variable controller output power supply to be measured, described output port of power source is through the power input mouth of on-off circuit connection test unit, and described on-off circuit is controlled by described control module.
For all kinds of conditions of work of frequency-variable controller operation are carried out simulation test, in described test unit, also be provided with the multichannel adjustable resistance, with analog temperature sensor, respectively by the multi way temperature detection signal input end corresponding connection of interface with frequency-variable controller to be measured.
Further, in described test unit, also include the monitoring modular that working current, voltage, frequency to frequency-variable controller to be measured detects demonstration, with the ruuning situation of real-time monitoring frequency-variable controller.
Compared with prior art, advantage of the present utility model and good effect are: test unit of the present utility model is simulated the electric machinery load that frequency-variable controller drives by the combination and the logic control of power resistor and high-power inductance coil, and frequency-variable controller is carried out the test of load capacity with this, have highly versatile, safe, significant advantage such as the load characteristic adjustment is succinct, reliable.Meanwhile, by the various kinds of sensors that is connected with frequency-variable controller of simulation, simulating all kinds of conditions of work of frequency-variable controller, and then its operation conditions is detected, thereby can guarantee accuracy of experimental results.
After reading the detailed description of the utility model embodiment in conjunction with the accompanying drawings, other characteristics of the present utility model and advantage will become clearer.
Description of drawings
Fig. 1 is the electrical block diagram of a kind of embodiment of the test unit that proposes of the utility model;
Fig. 2 is the internal circuit schematic diagram of test unit shown in Figure 1.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
Test unit of the present utility model is attempted to provide heavily stressed condition of work by adjusting fictitious load and working temperature for frequency-variable controller to be measured, so that frequency-variable controller to be measured is carried out accelerating aging test,, heavily stressed service condition make frequency-variable controller to be measured quicken to expose the design defect that may exist by being provided.
Embodiment one, and referring to shown in Figure 1, in the present embodiment, the described test unit that is used for frequency-variable controller comprises that mainly power input part divides and adjustable fictitious load part.Wherein, the 220V electric main connects ac power input end L, the N of frequency-variable controller to be measured by A.C. contactor JLJCQ4, described A.C. contactor JLJCQ4 is controlled by run switch SW05, when SW05 is closed, the normal open switch closure of A.C. contactor JLJCQ4, to frequency-variable controller output 220V alternating voltage to be measured, control its operation that powers on, output three-phase alternating voltage U, V, W.Described adjustable fictitious load partly is used for the load of simulated machine class, is connected three-phase alternating voltage output terminal U, V, the W of frequency-variable controller to be measured, switches by inductance value and impedance to fictitious load, to change the load characteristic of frequency-variable controller to be measured.
Fig. 2 is the physical circuit schematic diagram of described test unit, comprise power input L_in, N_in, be used to insert extraneous 220V single-phase AC civil power, and then pass through run switch SW05 link control module by live wire and zero line on the one hand through air switch respectively, normal open switch by A.C. contactor JLJCQ4 connects output port of power source L_OUT, N_OUT on the other hand, and then connect outside frequency-variable controller to be measured, to its output power supply.Described A.C. contactor JLJCQ4 coil one end connects zero line, the RY1 interface of other end link control module, and control module determines according to the on off operating mode of run switch SW05 whether A.C. contactor JLJCQ4 coil is communicated with live wire.
For the electric current that outputs to frequency-variable controller to be measured is detected, on live wire that is connected with described output port of power source L_OUT, N_OUT and zero line, also be connected with an electric current mutual inductor, and the digital electronic ammeter that is connected with described electric current mutual inductor.
In order to realize the adjustment of load characteristic, in the test unit of present embodiment, be provided with the load circuit that many groups are in series by resistance and inductance, wherein, described many group load circuits connect one to one with many groups switch ways of gating circuit respectively, and parallel with one another by described switch ways.As shown in Figure 2, be that example is elaborated with three groups of load circuits.Because the voltage of frequency-variable controller output to be measured is three-phase alternating voltage U, V, W, therefore, test unit is provided with threephase load port CN06, CN07 and CN08, is used for the corresponding connection of three-phase alternating voltage output terminal U, V, W with frequency-variable controller to be measured.With it accordingly, in described every group of load circuit, also be respectively arranged with three load branch that are in series by resistance and inductance, as first group of load circuit forming by resistance R 11, R12, R13 and inductance L _ U, L_V, L_W, second group of load circuit forming by resistance R 21, R22, R23 and inductance L _ U, L_V, L_W, and the 3rd group of load circuit of forming by resistance R 31, R32, R33 and inductance L _ U, L_V, L_W; Three road normal open switch by A.C. contactor JLJCQ1, JLJCQ2, JLJCQ3 are connected in parallel on threephase load port CN06, CN07 and the CN08 respectively.
A.C. contactor JLJCQ1, JLJCQ2, JLJCQ 3 form described gating circuit together with relay J DQ1, JDQ2, JDQ3 and hand switch SW01, SW02, SW03, SW04, to three groups of load circuits whether parallel connection select control, be applied to load value on the frequency-variable controller to be measured with change.Wherein, coil one end of described A.C. contactor JLJCQ1 connects zero line, the other end respectively with the corresponding connection of first via normally opened contact of relay J DQ1, JDQ2, JDQ3; Coil one end of A.C. contactor JLJCQ2 connects zero line, the other end respectively with the corresponding connection of the second road normally opened contact of relay J DQ1, JDQ2, JDQ3; Coil one end of A.C. contactor JLJCQ3 connects zero line, the other end respectively with the corresponding connection of Third Road normally opened contact of relay J DQ1, JDQ2, JDQ3.And the other end of the first via normally opened contact of described relay J DQ1 connects live wire, and second, third road normally opened contact suspends; Its coil one end ground connection, the other end connects hand switch SW04 by hand switch SW01, and then connection+12V direct supply.In like manner, the other end of first, second road normally opened contact of described relay J DQ2 connects live wire, and the Third Road normally opened contact suspends; Its coil one end ground connection, the other end connects hand switch SW04 by hand switch SW02, and then connection+12V direct supply.The other end of three road normally opened contacts of described relay J DQ3 all connects live wire; Its coil one end ground connection, the other end connects hand switch SW04 by hand switch SW03, and then connection+12V direct supply.Described+12V direct supply is by rectifier transformer module N1 the 220V alternating voltage of input to be carried out obtaining after the rectification step-down.
In described gating circuit, hand switch SW04 is that gauge tap is cut-off in power termination; SW01 is power termination-low gear switch; SW02 is power termination-middle gear switch; SW03 is power termination-Gao gear switch.When needs connect load on frequency-variable controller to be measured, at first closed hand switch SW04, and then the selection bearing power, promptly selecting closed hand switch SW01 still is SW02 or SW03, and described hand switch SW01, SW02, SW03 have only at one time one the tunnel can be closed.When selecting to insert low power load, closed hand switch SW01, relay J DQ1 adhesive this moment, and then control A.C. contactor JLJCQ1 adhesive, thereby first group of load circuit is connected to three-phase alternating voltage output terminal U, V, the W of frequency-variable controller to be measured, detects its ruuning situation under low load model.In like manner, when selecting to insert middle-grade power termination, closed hand switch SW02, relay J DQ2 adhesive this moment, and then control A.C. contactor JLJCQ1, JLJCQ2 adhesive simultaneously, thereby with being connected to three-phase alternating voltage output terminal U, V, the W of frequency-variable controller to be measured after first group of load circuit and the second group of load circuit parallel connection, to detect its ruuning situation under middle-grade load model.And when selecting to insert high power load, closed hand switch SW03, relay J DQ3 adhesive this moment, and then control A.C. contactor JLJCQ1, JLJCQ2, JLJCQ3 adhesive simultaneously, thereby with being connected to three-phase alternating voltage output terminal U, V, the W of frequency-variable controller to be measured after three groups of load circuit parallel connections, to detect its ruuning situation under the high capacity pattern.Pilot lamp LAMP1, LAMP2, LAMP3 indicate the gear of the load model of current access respectively.
Certainly, described gating circuit also can adopt the form that will link to each other between A.C. contactor JLJCQ1, JLJCQ2, JLJCQ 3 and hand switch SW01, SW02, the SW03 to realize, and is not shown.Wherein, coil one end of A.C. contactor JLJCQ1, JLJCQ2, JLJCQ3 connects zero line, and the other end connects live wire by hand switch SW01, SW02, SW03 respectively.When selecting to insert low power load, closed hand switch SW01, control A.C. contactor JLJCQ1 adhesive, thus first group of load circuit is connected to three-phase alternating voltage output terminal U, V, the W of frequency-variable controller to be measured, detect its ruuning situation under low load model.When selecting to insert middle-grade power termination, simultaneously closed hand switch SW01, SW02, control A.C. contactor JLJCQ1, JLJCQ2 adhesive, thereby, detect its ruuning situation under middle-grade load model with being connected to three-phase alternating voltage output terminal U, V, the W of frequency-variable controller to be measured after first group of load circuit and the first group of load circuit parallel connection.And when selecting to insert high power load, closed hand switch SW01 of while, SW02, SW03, control A.C. contactor JLJCQ1, JLJCQ2, JLJCQ3 adhesive simultaneously, thereby, detect its ruuning situation under the high capacity pattern with being connected to three-phase alternating voltage output terminal U, V, the W of frequency-variable controller to be measured after three groups of load circuit parallel connections.
The concrete syndeton the utility model that should be pointed out that described gating circuit also is not limited in above-mentioned two kinds of forms, so long as can all can to control circuit three groups of load circuits and that the joint group number is regulated.
For three-phase alternating voltage U, the V of input, the amplitude of W are detected, on described threephase load port CN06, CN07, CN08, be connected with the phase voltage testing circuit, specifically can adopt the mode that between every two-phase load port, connects voltage table to realize, as shown in Figure 2.
In order to realize the data communication between test unit and the frequency-variable controller to be measured, in described test unit, also be provided with a PORT COM SI, the communication interface CN3 of described control module connects described PORT COM SI through signal transmssion line, and then being connected communication with the frequency-variable controller to be measured of outside, its communication data can show in real time by the communication display screen that is connected with control module.
For all kinds of conditions of work of frequency-variable controller operation to be measured are carried out simulation test, in described test unit, also be provided with multichannel adjustable resistance R01, R02, R03, respectively in order to simulated environment temperature sensor, coil temperature sensor and compressor exhaust temperature sensor, respectively by the multi way temperature detection signal input end corresponding connection of interface CN10 with frequency-variable controller to be measured.By the resistance of change adjustable resistance R01, R02 or R03, and then make frequency-variable controller to be measured think that residing working temperature changes, thereby adjust its operational factor.At this moment, described test unit just can be judged the operation characteristic of frequency-variable controller to be measured by the every operational factor that detects frequency-variable controller to be measured, and then provides reliable evaluation.
In addition, on described interface CN10, also be connected with overheat of compressor protection switch SW06, be used to simulate overheat switch actual on the air conditioner, connect the temperature protection signal input interface of frequency-variable controller to be measured.Behind closed this switch, observe frequency-variable controller to be measured and whether enter the overheating protection pattern, whether can accurately respond temperature protection signal to judge frequency-variable controller to be measured, accurately execute protection action.
In addition, in described test unit, also include the monitoring modular TP1 that working current, voltage, frequency to frequency-variable controller to be measured detects demonstration, connect each monitoring point of frequency-variable controller to be measured by interface CN09, with the ruuning situation of real-time monitoring frequency-variable controller.
Test unit of the present utility model can be by adjusting fictitious load, running current, temperature, the magnitude of voltage of frequency-variable controller to be measured are transferred to maximum stress, electric current on the load device, voltage, thermometric instrument show the parameter of frequency-variable controller operation to be measured, when frequency-variable controller to be measured breaks down to diagnosing malfunction, the warning of frequency-variable controller to be measured.
Certainly; the above only is a kind of preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (10)
1, a kind of test unit that is used for frequency-variable controller is characterized in that: comprise power input mouth, gating circuit, load port and be connected many groups of load circuits that are in series by resistance and inductance between described gating circuit and the load port; Wherein, described many group load circuits connect one to one with many groups switch ways of gating circuit respectively, and parallel with one another by described switch ways.
2, the test unit that is used for frequency-variable controller according to claim 1, it is characterized in that: described load port is the threephase load port, in each group load circuit, all include three load branch that are in series by resistance and inductance, connect one to one by connected switch ways and described threephase load port respectively.
3, the test unit that is used for frequency-variable controller according to claim 2 is characterized in that: be connected with the phase voltage testing circuit on described threephase load port.
4, the test unit that is used for frequency-variable controller according to claim 2 is characterized in that: described power input mouth is the single phase alternating current power supply input port, connects live wire and zero line respectively.
5, the test unit that is used for frequency-variable controller according to claim 4, it is characterized in that: in described gating circuit, include the multichannel A.C. contactor, its coil one end connects zero line, the other end connects live wire by one road hand switch separately, and the normal open switch of described A.C. contactor is connected in the described load branch as the switch ways of described gating circuit.
6, the test unit that is used for frequency-variable controller according to claim 4, it is characterized in that: in described gating circuit, include multichannel A.C. contactor and multicircuit relay, coil one end of described A.C. contactor connects zero line, the other end respectively with the corresponding connection of a certain road normally opened contact of multicircuit relay, the normal open switch of described A.C. contactor is connected in the described load branch as the switch ways of described gating circuit; The coil of described multicircuit relay is connected in the direct current power supply loop by one road hand switch separately, its normally opened contact select one the tunnel or multichannel be connected between the coil of live wire and A.C. contactor.
7, according to each described test unit that is used for frequency-variable controller in the claim 1 to 6, it is characterized in that: also include a control module and a PORT COM in described test unit, the communication interface of described control module connects described PORT COM through signal transmssion line.
8, the test unit that is used for frequency-variable controller according to claim 7, it is characterized in that: on described test unit, also be provided with output port of power source, be used for to frequency-variable controller output power supply to be measured, described output port of power source is through the power input mouth of on-off circuit connection test unit, and described on-off circuit is controlled by described control module.
9, according to each described test unit that is used for frequency-variable controller in the claim 1 to 6, it is characterized in that: in described test unit, also include the multichannel adjustable resistance, respectively by the corresponding connection of multi way temperature detection signal input end of interface with frequency-variable controller to be measured.
10, according to each described test unit that is used for frequency-variable controller in the claim 1 to 6, it is characterized in that: in described test unit, also include the monitoring modular that working current, voltage, frequency to frequency-variable controller to be measured detects demonstration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201600357U CN201145713Y (en) | 2007-12-30 | 2007-12-30 | Experimental device for frequency conversion controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201600357U CN201145713Y (en) | 2007-12-30 | 2007-12-30 | Experimental device for frequency conversion controller |
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| CN201145713Y true CN201145713Y (en) | 2008-11-05 |
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| CNU2007201600357U Expired - Fee Related CN201145713Y (en) | 2007-12-30 | 2007-12-30 | Experimental device for frequency conversion controller |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968503A (en) * | 2010-09-14 | 2011-02-09 | 青岛海信电器股份有限公司 | Load circuit and load testing device with same |
| CN102722107A (en) * | 2011-03-29 | 2012-10-10 | 上海雷诺尔科技股份有限公司 | Intelligent integrated development and test system for high-voltage frequency converter and establishment method thereof |
| CN102902260A (en) * | 2011-07-26 | 2013-01-30 | 施耐德东芝换流器欧洲公司 | Motor loading device |
| CN103207333A (en) * | 2013-03-15 | 2013-07-17 | 深圳市三奇科技有限公司 | Automatic testing device and method for high-frequency frequency device |
| CN103884954A (en) * | 2014-03-15 | 2014-06-25 | 广东美的集团芜湖制冷设备有限公司 | Detecting device and method for air conditioner electric control |
| CN104596026A (en) * | 2014-12-15 | 2015-05-06 | 四川长虹电器股份有限公司 | Air-conditioner operating parameter monitoring device |
| CN105301382A (en) * | 2014-08-01 | 2016-02-03 | 智上科技股份有限公司 | Electronic device and detection method thereof |
| CN105588726A (en) * | 2015-04-28 | 2016-05-18 | 青岛海信日立空调系统有限公司 | Air-conditioner load simulator and air-conditioner test system |
| CN106226632A (en) * | 2016-09-06 | 2016-12-14 | 东莞市冠达自动化设备有限公司 | A kind of motor variable-frequency driver aging testing system and method for testing thereof |
| CN108680859A (en) * | 2018-06-13 | 2018-10-19 | 新乡市恒润机电有限公司 | A kind of pumping dirt pump motor control box fictitious load test method |
| CN109444593A (en) * | 2018-11-21 | 2019-03-08 | 科大智能电气技术有限公司 | A kind of automatization test system and method for distribution terminal load function |
| CN111913068A (en) * | 2018-11-19 | 2020-11-10 | 韩伟 | Portable microelectronic AC counting equipment test bench |
| CN116106780A (en) * | 2023-04-13 | 2023-05-12 | 深圳市鼎泰佳创科技有限公司 | Aging control energy-saving module of frequency converter power supply |
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2007
- 2007-12-30 CN CNU2007201600357U patent/CN201145713Y/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968503A (en) * | 2010-09-14 | 2011-02-09 | 青岛海信电器股份有限公司 | Load circuit and load testing device with same |
| CN102722107A (en) * | 2011-03-29 | 2012-10-10 | 上海雷诺尔科技股份有限公司 | Intelligent integrated development and test system for high-voltage frequency converter and establishment method thereof |
| CN102902260A (en) * | 2011-07-26 | 2013-01-30 | 施耐德东芝换流器欧洲公司 | Motor loading device |
| CN103207333B (en) * | 2013-03-15 | 2016-08-17 | 深圳市三奇科技有限公司 | A kind of high-frequency frequency automatic testing equipment and method of testing |
| CN103207333A (en) * | 2013-03-15 | 2013-07-17 | 深圳市三奇科技有限公司 | Automatic testing device and method for high-frequency frequency device |
| CN103884954A (en) * | 2014-03-15 | 2014-06-25 | 广东美的集团芜湖制冷设备有限公司 | Detecting device and method for air conditioner electric control |
| CN103884954B (en) * | 2014-03-15 | 2016-10-12 | 广东美的集团芜湖制冷设备有限公司 | A kind of air conditioner electric control detection device and detection method thereof |
| CN105301382A (en) * | 2014-08-01 | 2016-02-03 | 智上科技股份有限公司 | Electronic device and detection method thereof |
| CN104596026A (en) * | 2014-12-15 | 2015-05-06 | 四川长虹电器股份有限公司 | Air-conditioner operating parameter monitoring device |
| CN104596026B (en) * | 2014-12-15 | 2017-07-11 | 四川长虹电器股份有限公司 | A kind of air conditioner operation parameters monitoring device |
| CN105588726A (en) * | 2015-04-28 | 2016-05-18 | 青岛海信日立空调系统有限公司 | Air-conditioner load simulator and air-conditioner test system |
| CN106226632B (en) * | 2016-09-06 | 2023-10-20 | 东莞市冠达自动化设备有限公司 | Aging test system and method for variable frequency drive of motor |
| CN106226632A (en) * | 2016-09-06 | 2016-12-14 | 东莞市冠达自动化设备有限公司 | A kind of motor variable-frequency driver aging testing system and method for testing thereof |
| CN108680859A (en) * | 2018-06-13 | 2018-10-19 | 新乡市恒润机电有限公司 | A kind of pumping dirt pump motor control box fictitious load test method |
| CN111913068A (en) * | 2018-11-19 | 2020-11-10 | 韩伟 | Portable microelectronic AC counting equipment test bench |
| CN111913068B (en) * | 2018-11-19 | 2023-05-09 | 高曙明 | Portable microelectronic alternating current counting equipment test bench |
| CN109444593B (en) * | 2018-11-21 | 2021-04-06 | 科大智能电气技术有限公司 | Automatic testing system and method for load-carrying performance of power distribution terminal |
| CN109444593A (en) * | 2018-11-21 | 2019-03-08 | 科大智能电气技术有限公司 | A kind of automatization test system and method for distribution terminal load function |
| CN116106780A (en) * | 2023-04-13 | 2023-05-12 | 深圳市鼎泰佳创科技有限公司 | Aging control energy-saving module of frequency converter power supply |
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