Inductance parameter identification method for permanent magnet synchronous motor based on high frequency rotating voltage injection

A permanent magnet synchronous motor, high-frequency rotating voltage technology, used in motor generator control, electronic commutation motor control, control generators, etc. Changes and other problems, to achieve the effect of simple and reliable algorithm, strong versatility

Active Publication Date: 2021-04-27
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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  • Inductance parameter identification method for permanent magnet synchronous motor based on high frequency rotating voltage injection
  • Inductance parameter identification method for permanent magnet synchronous motor based on high frequency rotating voltage injection
  • Inductance parameter identification method for permanent magnet synchronous motor based on high frequency rotating 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 method for identifying inductance parameters of a permanent magnet synchronous motor based on high-frequency rotating voltage injection in the field of motor control. The method injects a high-frequency sinusoidal rotating voltage into the dq axis to obtain a high-frequency response current signal of the dq axis. The amplitude of the above-mentioned response signal components is used to calculate the dq-axis inductance, and the invention is easy to implement without adding redundant hardware equipment, and the frequency and amplitude of the high-frequency sinusoidal rotating voltage injected into the motor are also easy to control, and the motor can be identified online. The d-axis inductance and q-axis inductance.

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...

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Application Information

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Patent Type & Authority Patents(China)
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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