Method for adaptively acquiring initial position of motor rotor

A technology for the initial position of the rotor and the rotor of the motor, which is applied in the direction of controlling the generator, the control of the motor generator, and the control of the electromechanical transmission device. The effect of saving manpower and material resources and improving efficiency

Inactive Publication Date: 2016-10-12
澳特卡新能源科技(上海)有限公司 +1
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AI Technical Summary

Problems solved by technology

If the detection of the initial rotor position is wrong, it will seriously affect the calculation of the rotor position in the future, so that other series of algorithms about motor control cannot be completed correctly, which will cause the motor to run in disorder and make it unable to enter the normal running state
[0003] At present, the detection of th

Method used

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  • Method for adaptively acquiring initial position of motor rotor
  • Method for adaptively acquiring initial position of motor rotor
  • Method for adaptively acquiring initial position of motor rotor

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[0039] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

[0040] like figure 1 As shown, a method for adaptively acquiring the initial position of a motor rotor includes the following steps:

[0041] Step 1, the motor controller controls the motor to be in a free rotation state.

[0042] Step 2, the motor controller passes I to the motor qcmd =0, I dcmd = Current command for field weakening current.

[0043] Step 3, the motor controller collects the actual phase current of the motor, and converts the phase current into the actual d-axis current I of the rotor d and the actual q-axis current I q .

[0044] The motor controller collects the actual d-axis current I of the rotor of the motor d and the actual q-axis current I q The proc...

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Abstract

The invention discloses a method for self-adaptive acquisition of the initial position of the motor rotor, which controls the motor to be in a free-rotating state, through the I qcmd = 0, I dcmd = The current command of the magnetic field weakening current. When the initial position of the motor rotor is aligned, the motor is in a static state. If the initial position is not aligned, the motor will rotate. Adjust the offset angle of the initial rotor position through the motor controller until the motor stops Rotate, and finally make the d-axis direction of the motor rotor coincide with the A-axis of the stator. The invention can quickly detect the initial position of the motor rotor in real time, avoiding the need for each motor to be calibrated on a stand, saving manpower and material resources, improving the accuracy of torque control, avoiding repeated labor, and improving work efficiency. Suitable for mass production of motors and their motor controllers in mass production.

Description

technical field [0001] The invention relates to an adaptive acquisition method for the initial position of a motor rotor, which belongs to the field of permanent magnet motor control. Background technique [0002] Permanent magnet motors are widely used in pure electric vehicles and hybrid electric vehicles. For mass-produced permanent magnet motors, due to current processing technology problems and cost considerations, there is a certain deviation in the initial position of the rotor of each permanent magnet motor. The initial position information of the rotor is the prerequisite for the motor to start and run normally, and it is also a necessary condition for the correct implementation of the control algorithm. If the detection of the initial rotor position is wrong, it will seriously affect the calculation of the rotor position in the future, so that other series of algorithms about motor control cannot be completed correctly, which will cause the motor to run in disorder...

Claims

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Application Information

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IPC IPC(8): H02P21/18
Inventor 陶冬生张臻郝鹏程高晓杰牛敬彬
Owner 澳特卡新能源科技(上海)有限公司
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