Control method of drive system of salient pole type permanent magnet synchronous motor

A permanent magnet synchronous motor and drive system technology, applied in motor generator control, electronic commutation motor control, control system, etc., can solve the control limitations of permanent magnet synchronous motor drive system, time-consuming and laborious experimental equipment requirements, and can not characterize the motor. Cross-coupling effects, etc.
CN102710210AActive Publication Date: 2012-10-03HEFEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HEFEI UNIV OF TECH
Publication Date
2012-10-03

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Abstract

The invention discloses a control method of a drive system of a salient pole type permanent magnet synchronous motor. The control method is characterized by comprising the steps of: acquiring a d-shaft current instruction fitting expression and a q-shaft current instruction computation expression of an instruction generator by adopting a motor electric magnetic field finite element analysis method according to detected stator a-phase current ia, stator b-phase current ib, stator c-phase current ic, rotor actual position angle theta r, and actual speed omega r, producing a d-shaft stator current instruction id<*> and a q-shaft stator current instruction iq<*> by the instruction generator, acquiring a stator d-shaft voltage instruction ud<*> and a stator q-shaft voltage instruction uq<*> via a current PI (Proportional-Integral) regulator, obtaining three control signals including Sa, Sb and Sc of an inerter by a PWM (Pulse Width Modulation) module according to the acquired instructions, converting voltage udc supplied by a battery pack into control voltages UA, UB and UC of the salient pole type permanent magnet synchronous motor via the inverter by using the three control signals Sa, Sb and Sc, thereby realizing the control of the permanent magnet synchronous motor. The control method disclosed by the invention can be used for effectively increasing the torque output of the permanent magnet synchronous motor under the same current, thereby increasing the control performance of the drive system of the permanent magnet synchronous motor.
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Description

technical field

[0001] The invention relates to a motor control system, in particular to a control method for a salient-pole permanent magnet synchronous motor drive system. Background technique

[0002] The salient pole permanent magnet synchronous motor has the advantages of high efficiency, high power density, small torque ripple, fast dynamic response, wide speed range, etc., and is currently widely used in the field of electric vehicle electric drive systems.

[0003] Affected by the characteristics of permanent magnet materials and the operating conditions of the salient pole permanent magnet synchronous motor drive system, the d-axis inductance parameters and q-axis inductance parameters of the permanent magnet synchronous motor generally do not remain constant in the entire operating area, especially in the permanent magnet synchronous motor. When the synchronous motor drive system operates under certain working conditions, it is prone to magnetic circuit saturation,...

Claims

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