Three-phase asynchronous motor energy feedback type test device

A three-phase asynchronous, energy feedback technology, applied in the direction of motor generator testing, etc., can solve the problems of high power requirements and high cost of the inverter unit, and achieve the effect of simple control and simple circuit structure

Active Publication Date: 2016-06-22
SHANGHAI MOTOR SYST ENERGY SAVING ENG TECH RES CENT +1
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  • Summary
  • Abstract
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  • 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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  • Three-phase asynchronous motor energy feedback type test device
  • Three-phase asynchronous motor energy feedback type test device
  • Three-phase asynchronous motor energy feedback type test device

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Embodiment Construction

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

[0019] See figure 2 The feature 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 one branch is connected to the auxiliary motor M2 and the tested motor M1 through an AC contactor. Connect with auxiliary motor M2 through coupling. The tested motor M1 is working in an electric state, and the auxiliary motor M2 is working in a generating 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 performed, 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 output frequency rating and output voltage is 0, and the out...

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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 test equipment for a motor, in particular to a three-phase asynchronous motor energy feedback type test device, in particular to a load and temperature rise test of a 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 double "inverter-motor" test system, see figure 1 , Use asynchronous motors with similar models as the load (auxiliary motors). The test system consists of a rectifier unit, inverter 1-the motor under test M1, and inverter 2-auxiliary motor M2. The tested motor M1 and the auxiliary motor M2 are connected by a coupling, from figure 1 It can be seen that there are two inverter units 1 and 2 on the DC bus. The tested motor M1 works in an electric state, and the auxiliary motor M2 works in a power generation state....

Claims

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Application Information

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Patent Type & Authority Patents(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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