A position sensorless control method for multi-phase permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and control method, applied in the direction of motor generator control, electronic commutation motor control, control system, etc., can solve problems such as unstable operation, low operation stability, complex hardware structure, etc., and achieve stability Good, strong load capacity, fast starting ability effect
CN113114078BActive Publication Date: 2022-05-27WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
Publication Date
2022-05-27

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Abstract

The invention discloses a position sensorless control method of a multi-phase permanent magnet synchronous motor. The stator current state space model is constructed under the estimated dq axis system, and according to the q-axis of the estimated current value and the actual current value in each control cycle The error component is integrated to obtain a preliminary estimated speed, and the d-axis error component between the estimated current value and the actual current value is used to correct the preliminary estimated speed to realize the motor speed estimation. The motor of the present invention can directly start quickly in a vector closed-loop from a static state, does not need multiple algorithm switching in the full speed range, has the advantages of fast start capability, good high-speed operation stability, and strong low-speed operation load capacity.
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Description

technical field

[0001] The invention belongs to the technical field of motor control, and in particular relates to a position sensorless control method of a multi-phase permanent magnet synchronous motor. Background technique

[0002] Compared with traditional three-phase motor systems, multi-phase permanent magnet motors have more prominent advantages in high-power and high-reliability applications: high power can be achieved with smaller capacity devices; multi-phase motor systems can achieve redundant control and improve system performance. Reliability; small electromagnetic torque ripple; reduce DC bus current harmonics. It has received extensive attention in the fields of ship propulsion, urban light rail, locomotive traction, aerospace and other fields.

[0003] The high-performance permanent magnet synchronous motor vector control needs to obtain the rotor magnetic pole position information. The method of adding a mechanical encoder to obtain the rotor magnetic pole ...

Claims

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