Three-phase asynchronous motor parameter off-line acquisition method and system

A three-phase asynchronous, motor parameter technology, applied in control systems, control generators, vector control systems, etc., can solve problems such as the inability to quickly and accurately obtain internal parameters of static three-phase asynchronous motors, and achieve safe and reliable startup and speed up The effect of convergence speed

Active Publication Date: 2017-06-13
CRRC DALIAN R & D CO LTD
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Problems solved by technology

[0005] The invention provides a method and system for off-line acquisition of three-phase asynchronous motor parameters, which are used to solve the problem that the prior art cannot quickly and accurately obtain the internal parameters of a static three-phase asynchronous motor

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  • Three-phase asynchronous motor parameter off-line acquisition method and system
  • Three-phase asynchronous motor parameter off-line acquisition method and system
  • Three-phase asynchronous motor parameter off-line acquisition method and system

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[0031] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0032] The off-line acquisition method of parameters of a three-phase asynchronous motor provided by the present invention is suitable for an off-line acquisition system of parameters of a three-phase asynchronous motor, and is used to solve the problem that the internal parameters of a static three-phase asynchronous motor cannot be easily, quickly and accurately obtained in the...

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Abstract

The invention provides a three-phase asynchronous motor parameter off-line acquisition method and system. The method includes the steps: driving an inverter by a controller to apply excitation voltage to any two phases of a three-phase asynchronous motor at different time periods, and acquiring response current generated by the three-phase asynchronous motor according to the excitation voltage at different time periods; acquiring the leakage inductance of the three-phase asynchronous motor according to the excitation voltage, the response current and a first equivalent circuit, and acquiring a first time constant of the three-phase asynchronous motor according to the response current and a second equivalent circuit. According to the technical scheme, parameters of the motor can be statically recognized under the condition of finishing installation of the motor, good initial values are provided for an online identification algorithm, safe and reliable starting of the three-phase asynchronous motor is further ensured, and convergence of the online identification algorithm is accelerated.

Description

technical field [0001] The invention relates to a three-phase asynchronous motor parameter identification technology, in particular to an off-line acquisition method and system for three-phase asynchronous motor parameters. Background technique [0002] At present, in the frequency conversion speed regulation system of three-phase asynchronous motor, vector control is considered as an ideal control method. Among them, the vector control method controls the excitation current and torque current of the asynchronous motor respectively according to the principle of magnetic field orientation, so as to achieve control The purpose of asynchronous motor torque. However, there are still some problems to be solved in the vector control technology, one of which is how to accurately determine the internal parameters of the three-phase asynchronous motor such as the stator resistance, rotor resistance, leakage inductance and mutual inductance, so as to ensure the protection against the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34H02P21/14
CPCH02P21/14G01R31/34
Inventor 王雪迪杨扬杜继光丛培城
Owner CRRC DALIAN R & D CO LTD
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