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Method and device for detecting rationality of resolver initial angle

A technology of initial angle and detection method, applied in the direction of measuring device, controlling electromechanical transmission device, measuring electricity, etc., can solve the problems of unfavorable motor control divergence, unable to detect the initial angle closed-loop detection of motor resolver, etc., to suppress divergence and improve stability Effect

Active Publication Date: 2020-06-09
SAIC MOTOR
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Problems solved by technology

[0005] The technical problem solved by the present invention is that the prior art cannot perform closed-loop detection on the initial angle of the motor’s resolver, which is not conducive to suppressing the divergence of motor control under the demand of medium, high speed and large torque

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  • Method and device for detecting rationality of resolver initial angle

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Embodiment Construction

[0030] Those skilled in the art understand that since the initial angle of the resolver of the existing motor is generated by one-time setting, and most of them are in an open-loop state, there is a lack of online detection of the resolver initial angle of the motor in the actual motor control process .

[0031] In order to solve this technical problem, the technical solution of the present invention judges whether the initial angle of the resolver of the motor is reasonable by obtaining the position angle difference of the current vector and the voltage vector of the motor, combined with the working mode of the motor. Compared with the one-time setting and open-loop operation setting mode adopted by the variable initial angle, it can detect the unreasonable initial angle of the resolver in time through closed-loop detection for the situation where the initial angle of the resolver of the motor has a large deviation, and realize the correctness of the initial angle of the resol...

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Abstract

The invention relates to a method and device for detecting the rationality of a rotating transformation initial angle. The method comprises the steps of acquiring the position angle difference of a current vector and a voltage vector of a motor; determining an operating mode of the motor; and judging whether the rotating transformation initial angle of the motor is rational or not based on the position angle difference and an error threshold corresponding to the operating mode of the motor. The technical scheme provided by the invention can effectively suppress a problem of a big torque outputerror caused by great deviation in rotating transformation initial angle initially set by the motor and a problem of diverging motor control under the requirements of medium and high speed and largetorque.

Description

technical field [0001] The invention relates to the field of motor detection, in particular to a method and device for detecting the rationality of an initial angle of a resolver. Background technique [0002] With the development of industrial and agricultural production machinery, motors as driving sources can be divided into three categories: DC motors, asynchronous motors and synchronous motors based on their working principles. As a popular product in synchronous motors, permanent magnet synchronous motors are The reliability, excellent control performance, small torque fluctuation and other advantages have been widely used in the automotive field, especially in new energy vehicles. In order to further improve the driving stability and driving comfort of the car, a resolver device is generally added to the permanent magnet synchronous motor, and the initial angle of the resolver device is directly related to whether the output torque of the permanent magnet synchronous ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/18G01R31/34
CPCG01R31/343
Inventor 王东萃潘景鹏
Owner SAIC MOTOR
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