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PMSM rotary transformer zero position initial angle calibration method and calibration system

A technology of permanent magnet synchronous motor and calibration method, which is applied in control systems, control generators, vector control systems, etc., can solve the problems of complex calibration process and high hardware requirements, achieve simple calibration operation, reduce equipment dependence, and calculation method Simple and clear effect

Active Publication Date: 2017-11-28
GUANGZHOU AUTOMOBILE GROUP CO LTD
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Problems solved by technology

[0007] The purpose of the present invention is to provide a permanent magnet synchronous motor resolver zero initial angle calibration method and a calibration system to solve the problem of requiring special calibration equipment or additional auxiliary sensors in the prior art, resulting in complicated calibration process and high hardware requirements question

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  • PMSM rotary transformer zero position initial angle calibration method and calibration system
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  • PMSM rotary transformer zero position initial angle calibration method and calibration system

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Embodiment Construction

[0030] In order to further explain the technical means and functions adopted by the present invention to achieve the intended invention purpose, the specific implementation methods, structures, features and functions proposed according to the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0031] The embodiment of the present invention provides a method for calibrating the zero position of the resolver suitable for permanent magnet synchronous motors. The calibration method only needs an ordinary motor test bench to drive the permanent magnet synchronous motor to run at a given speed and constant speed without other For any additional circuits and auxiliary sensors, the zero position calibration of the resolver can be realized by using the phase current sensor of the motor controller itself and the resolver decoding circuit.

[0032] Such as figure 2 As shown, the calibration system of the embodime...

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Abstract

The invention discloses a PMSM rotary transformer zero position initial angle calibration method and calibration system. The PMSM rotary transformer zero position initial angle calibration method comprises steps of connecting an PMSM, on which a rotary transformer is installed, to a driving motor, enabling a motor stator of the PMSM to perform three-phase short circuit, using the driving motor to drive the PMSM to rotate forward and maintain at a preset rotation speed, using an electronic control unit to perform sampling on three phase current Ia, Ib and I c and a rotary transformer reading phi read at a same moment, using the rotary transformer reading phi read to perform Park conversion on three phase current Ia, Ib and Ic to obtain current vectors Is,p, calculating a vector angle theta p corresponding the current vector Is,p, using the driving motor to drive the PMSM to rotate backwards and maintaining the rotation at a preset rotation speed, using the electronic control unit to record a vector angle theta n corresponding to a current vector Is,n when the motor is rotated backwards, and calculating that a practical electric rotation angle theta 0 corresponding to the rotary transformer reading zero point angle is a zero position initial angle according to a formula theta 0=(thetap+thetan) / 2-180 degree.

Description

technical field [0001] The invention relates to the technical field of drive motors, in particular to a calibration method and a calibration system for the initial angle of zero position of a permanent magnet synchronous motor resolver. Background technique [0002] Permanent magnet synchronous motors have high efficiency and high power density, and are the mainstream drive motors for electric vehicles. High-quality control of permanent magnet synchronous motors requires accurate detection of the rotor electrical angle. The resolver is referred to as a resolver. It is an angle sensor. It has the advantages of resistance to harsh environments, vibration resistance, high reliability, and high precision. It has been more and more widely used. The permanent magnet synchronous motor drive scheme using a resolver as an angle sensor It is the mainstream solution for electric vehicle drive at present. [0003] When using a resolver for angle sensing of a PMSM, it is necessary to k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/18H02P25/026H02P27/06
CPCH02P6/16H02P21/14
Inventor 裴锋赵小坤夏铸亮肖隆兴李乐荣唐君华
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD
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