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Energy feedback type test device for three-phase asynchronous motor

An energy feedback, three-phase asynchronous technology, which is applied in the load and temperature rise test of three-phase asynchronous motor, and the field of three-phase asynchronous motor energy feedback type test device, can solve the problems of high cost and large power requirement of inverter unit, etc. To achieve the effect of simple control and simple circuit structure

Active Publication Date: 2013-03-13
SHANGHAI MOTOR SYST ENERGY SAVING ENG TECH RES CENT +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This kind of test system can complete the load test of the asynchronous motor very well, and effectively realize the energy feedback, but it can be seen from the system composition that there are two inverter systems matching the asynchronous motor, so as the tested With the increase of motor power, the power requirements of the inverter unit are very large, and the cost is bound to be high

Method used

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  • Energy feedback type test device for three-phase asynchronous motor
  • Energy feedback type test device for three-phase asynchronous motor
  • Energy feedback type test device for three-phase asynchronous motor

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Embodiment Construction

[0018] Embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0019] see figure 2 The characteristic of the present invention is that the universal frequency converter is connected to a reactor, and then two branches are separated, one branch is connected to the test frequency converter and the tested motor M1, and the other branch is connected to the auxiliary motor M2 through the AC contactor, and the tested motor M1 It is connected with auxiliary motor M2 through a coupling. The tested motor M1 works in the electric state, and the auxiliary motor M2 works in the power generation state. The power supply of the tested motor M1 and the auxiliary motor M2 adopts this method,

[0020] see image 3 , Figure 4 , When the load and temperature rise test is carried out, the AC contactor KM is closed, and the auxiliary motor M2 is energized. At this time, the test inverter is adjusted to the state of the rated output fre...

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Abstract

An energy feedback type test device for a three-phase asynchronous motor comprises a general-purpose inverter, a test inverter, a reactor, a tested motor, a helper motor, an AC contactor and a coupling, and is characterized in that the output end of the general-purpose inverter is connected with the reactor, the leading-out terminal of the reactor is divided into two ways, one way is connected with the tested motor through the test inverter, the other way is connected with the helper motor through the AC contactor, and the tested motor is mechanically connected with the helper motor through the coupling. The device has the advantages that the circuit structure is simple, energy feedback is achieved, the capacity of the general-purpose inverter is only needed for 1 / 3 that of the tested motor, and the control is simple and direct.

Description

technical field [0001] The invention relates to a testing device for an electric motor, in particular to a three-phase asynchronous motor energy feedback type test device, which is especially used for the load and temperature rise test of the three-phase asynchronous motor. Background technique [0002] There are many test items for three-phase asynchronous motors, especially the load and temperature rise tests are more complicated. At present, the test system mostly adopts the energy feedback type dual "inverter-motor" test system, see figure 1 , using an asynchronous motor with a similar model as the load (auxiliary motor), the test system consists of a rectifier unit, inverter 1-tested motor M1, inverter 2-auxiliary motor M2. The tested motor M1 and the auxiliary motor M2 are connected with a coupling, from figure 1 It can be seen that there are two inverter units 1 and 2 hanging on the DC bus. The tested motor M1 works in the electric state, the auxiliary motor M2 work...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34
Inventor 冯东升金惟伟张金辉韩宝江
Owner SHANGHAI MOTOR SYST ENERGY SAVING ENG TECH RES CENT
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