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PMSM (permanent magnet synchronous motor) inductance parameter identification method based on high-frequency rotation voltage injection

A permanent magnet synchronous motor, high-frequency rotating voltage technology, applied in the direction of motor generator control, electronic commutation motor control, control generator, etc., can solve the problem of torque accuracy decline, system stability deterioration, and condition changes Changes and other problems, to achieve the effect of simple, reliable and strong versatility of the algorithm

Active Publication Date: 2019-08-09
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, these parameters will change with the change of operating conditions, especially the dq-axis inductance is not only affected by the saturation effect caused by the stator current, but also by the cross saturation. When the inductance changes greatly, the torque accuracy will drop, System stability deterioration and other problems, so it is necessary to identify the inductance parameters of the motor

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  • PMSM (permanent magnet synchronous motor) inductance parameter identification method based on high-frequency rotation voltage injection
  • PMSM (permanent magnet synchronous motor) inductance parameter identification method based on high-frequency rotation voltage injection
  • PMSM (permanent magnet synchronous motor) inductance parameter identification method based on high-frequency rotation voltage injection

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Embodiment Construction

[0025] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0026] The present invention is mainly a permanent magnet synchronous motor inductance parameter identification method based on high-frequency rotating voltage injection, which first injects a high-frequency sinusoidal rotating voltage signal into the dq axis, and obtains the amplitude of the high-frequency response current corresponding to the frequency of the dq axis , calculating the dq-axis inductance according to the amplitude of the high-frequency component in the high-frequency response current of the dq-axis.

[0027] The control system used in this identification method mainly includes: three-phase inverter, space vector pulse width modulation unit, photoelectric encoder unit, three-phase stationary-two-phase stationary coordinate transformation unit, two-phase stationary-two-phase rotational coordinate transformation unit , Two-phase rota...

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Abstract

The invention discloses a PMSM (permanent magnet synchronous motor) inductance parameter identification method based on high-frequency rotation voltage injection, and the method comprises the steps: injecting a high-frequency sine rotation voltage into a dq axis, obtaining a high-frequency response current signal of the dq axis, and calculating the inductance of the dq axis according to the amplitude of a response signal component. The method is easy to implement, no redundant hardware equipment needs to be added, the frequency and the amplitude of the high-frequency sinusoidal rotation voltage injected into the motor are easy to control, and the d-axis inductance and the q-axis inductance of the motor can be obtained through online identification.

Description

technical field [0001] The invention relates to a method for identifying an inductance parameter of a motor, in particular to a method for identifying an inductance parameter of a permanent magnet synchronous motor, which belongs to the technical field of motor control. Background technique [0002] Permanent magnet synchronous motor has many advantages such as small size, high power factor, high efficiency, wide range of speed regulation, reliable operation, easy maintenance, etc., so it is widely used in the field of electric vehicles, servo control, household appliances and other high performance requirements field. Advanced control algorithms such as maximum torque current ratio control, field weakening control, and speed sensorless control used in the PMSM drive system must accurately know the motor parameters. However, these parameters will change with the change of operating conditions, especially the dq-axis inductance is not only affected by the saturation effect c...

Claims

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Application Information

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IPC IPC(8): H02P21/14H02P25/022
CPCH02P21/14H02P25/022H02P2207/05
Inventor 郭鸿浩吕鹏程曹睿冷慧
Owner NANJING UNIV OF POSTS & TELECOMM
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