Torque closed-loop control method of interior permanent magnet synchronous motor driving system for automobile

A permanent magnet synchronous motor, torque closed-loop technology, applied in motor generator control, electronic commutation motor control, control system and other directions, can solve the limitations of design methods, differences in PI regulator parameters and other problems, to improve accuracy, High stability margin, the effect of ensuring stability

Active Publication Date: 2018-09-18
NAVAL UNIV OF ENG PLA
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Problems solved by technology

First of all, the design methods are mostly limited to the current loop, and the PI regulator parameters of the flux-weakening loop and the torque loop are not designed; secondly, the systems targeted are mostly hidden pole permanent magnet synchronous motor drive systems rather than IPMSM drive systems. There are certain differences between the two in the design of PI regulator parameters

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  • Torque closed-loop control method of interior permanent magnet synchronous motor driving system for automobile
  • Torque closed-loop control method of interior permanent magnet synchronous motor driving system for automobile
  • Torque closed-loop control method of interior permanent magnet synchronous motor driving system for automobile

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Embodiment Construction

[0075] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not limit the present invention.

[0076] The invention provides a torque closed-loop control method of a built-in permanent magnet synchronous motor drive system for a vehicle, comprising the following steps:

[0077] 1. Observation of input power, loss and output torque of vehicle IPMSM

[0078] The input power expression of the motor is:

[0079] P in =1.5(u d i d + u q i q ) (1)

[0080] Among them, u d , u q is the stator d, q axis voltage; i d i q is the stator d, q axis current; i in formula (1) d ,i q It is obtained through coordinate transformation after the three-phase current collected by the sensor, so the main factors affecting the accuracy are the sensor acquisition error and the rotor position signal error used for coordinate transformati...

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Abstract

The invention provides a torque closed-loop control method of an interior permanent magnet synchronous motor driving system for an automobile. The torque closed-loop control method combines a maximumtorque to current ratio algorithm with dual current loop flux-weakening control, utilizes an invented torque observer, corrects a set value of a quadrature axis current in real time by means of a torque closed loop PI adjuster, ensures that the motor output torque can track a torque instruction quickly and precisely in the case of errors in motor parameters, and further realizes high-precision torque closed-loop control of the driving system. The torque closed-loop control method has the advantages of clear principle and simple calculation, can be widely applied to interior permanent magnet synchronous motor driving systems for automobiles, can be popularized to the servo control of permanent magnet synchronous motor in other fields, and has high theoretical significance and engineering application value.

Description

technical field [0001] The invention relates to the technical field of permanent magnet synchronous motor control, in particular to a torque closed-loop control method for a vehicle built-in permanent magnet synchronous motor drive system. Background technique [0002] Interior permanent magnet synchronous motor (IPMSM) has the advantages of high power density and high efficiency, and has been widely used in electric vehicle drive systems. The IPMSM for vehicles is mostly in the torque control mode, that is, the drive system performs tracking control on the torque command issued by the main control system. The traditional torque control strategy is mostly open-loop control, that is, after the motor driver receives the torque command, it directly calculates the given value of the AC and DC axis current through the motor model, and then controls it through the AC and DC axis current double closed-loop PI regulator. Since accurate motor parameters are needed to calculate the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/22H02P21/20H02P21/14H02P21/13
CPCH02P21/13H02P21/14H02P21/20H02P21/22
Inventor 连传强肖飞高山
Owner NAVAL UNIV OF ENG PLA
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