Method and device for measuring time constant of asynchronous motor rotor on line

A rotor time constant, asynchronous motor technology, applied in the control of electromechanical transmission, generator control, motor generator control, etc., can solve the problems of complex algorithm, low accuracy of rotor time constant, and large CPU resource occupation. Simple algorithm, high precision, and low CPU resource usage

Inactive Publication Date: 2013-02-06
SHENZHEN HANGSHENG ELECTRONICS
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a simple algorithm, small CPU resource occupation, and low measurement accuracy for the defects of the prior art that the above-mentioned algorithm is complex, occupies a large amount of CPU resources, and the accuracy of the measured rotor time constant is not high. Method and device for online measurement of asynchronous motor rotor time constant with high rotor time constant accuracy

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  • Method and device for measuring time constant of asynchronous motor rotor on line
  • Method and device for measuring time constant of asynchronous motor rotor on line
  • Method and device for measuring time constant of asynchronous motor rotor on line

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Embodiment Construction

[0061] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0062] In the embodiment of the method and device for measuring the time constant of the rotor of an asynchronous motor on-line in the present invention, the flow chart of the method is as follows figure 1 shown. figure 1 Among them, the methods for online measurement of the rotor time constant of asynchronous motors include:

[0063] Step S01 preset initial parameters: in order to establish a voltage model, a set of initial parameters of the motor need to be preset. For how to specify the initial parameters in advance in this step, please refer to figure 2 , described later. After this step is executed, step S02 is executed.

[0064] Step S02 Obtain the induced electromotive force of the rotor flux linkage on the stator winding: Accordin...

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Abstract

The invention relates to a method for measuring the time constant of an asynchronous motor rotor on line. The method comprises the following steps of: giving initial parameters in advance; obtaining induced electromotive force of a rotor flux linkage on a stator winding; processing the induced electromotive force of the rotor flux linkage on the stator winding to obtain a value of synchronous angular speed; obtaining a value of slip frequency from the synchronous angular speed; and obtaining a value of time constant of the rotor according to a slip frequency formula. The invention further relates to a device for implementing the method for measuring the time constant of the asynchronous motor rotor on line. The method and device for measuring the time constant of the asynchronous motor rotor on line, disclosed by the invention, have the beneficial effects of simple algorithm, small occupying area on CPU (Central Processing Unit) resources and higher precision of measured time constant of the rotor.

Description

technical field [0001] The invention relates to the field of electric vehicles, and more specifically relates to a method and a device for online measuring the time constant of an asynchronous motor rotor. Background technique [0002] With the increasingly prominent energy shortage and environmental problems, electric vehicles have attracted more and more attention due to the advantages of diverse energy sources and low environmental pollution. Governments and automobile manufacturers have invested a lot of manpower and resources in the research and development of electric vehicles. physical resources. As a power source, the traction motor plays an important role in electric vehicles. At present, the mainstream traction motors mainly include permanent magnet synchronous motors and asynchronous induction motors. These two motors have their own advantages and disadvantages, and they have no obvious advantages when compared with each other. [0003] Asynchronous motors are f...

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Application Information

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IPC IPC(8): H02P21/14H02P21/16
Inventor 姚伟科刘爱华郑春阳
Owner SHENZHEN HANGSHENG ELECTRONICS
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