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Adaptive fault tolerant control method with salient pole permanent magnet synchronous motor precise torque output

A permanent magnet synchronous motor, torque output technology, applied in the direction of motor generator control, electronic commutation motor control, control system, etc., can solve the problems affecting the control performance of the system and the complex control structure.

Active Publication Date: 2015-08-12
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The IPMSM control scheme based on the disturbance observer, the system control structure is relatively complex, and the disturbance observation results directly affect the control performance of the system

Method used

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  • Adaptive fault tolerant control method with salient pole permanent magnet synchronous motor precise torque output
  • Adaptive fault tolerant control method with salient pole permanent magnet synchronous motor precise torque output
  • Adaptive fault tolerant control method with salient pole permanent magnet synchronous motor precise torque output

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Embodiment Construction

[0076] In this embodiment, the modules in the control system of the salient-pole permanent magnet synchronous motor include: a current command table, a current regulator, a model-free adaptive controller, an adaptive fault-tolerant torque regulator, a current sensor, a position sensor, and Coordinate transformation module, speed calculation module, torque observer and SVPWM modulation module, such as figure 1 Shown is the control block diagram of the adaptive fault-tolerant control method for the precise torque output of the salient-pole permanent magnet synchronous motor for electric vehicles in this embodiment; wherein, the current regulator includes a direct-axis current PI regulator and a quadrature-axis current PI regulator ; The adaptive fault-tolerant torque regulator includes a torque PI regulator and a fault judgment module.

[0077] Step 1. Set the sampling period of the control system operation as T s , in this embodiment, the sampling period T s is 100 microsecon...

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Abstract

The present invention discloses an adaptive fault tolerant control method with salient pole permanent magnet synchronous motor precise torque output. The method is characterized in that based on a model free adaptive controller, the reference voltage disturbance quantity caused by parameter change of a motor is obtained, on one hand, the reference voltage disturbance quantity is compensated to a control system, a motor system of parameter change is stabilized to a motor system of a nominal parameter, the dynamic performance of a current loop is improved, on the other end, a torque disturbance estimation value is obtained and is compared with a given torque error threshold value, a failure judgment module is formed, when the appearance of a torque tracking failure is judged, a torque command correction amount is outputted through an adaptive fault-tolerant torque regulator and is stacked with a given torque command, a new correction torque command is generated, and the torque control precision of the system is improved. By using a torque feedback loop control structure, the precise torque output under a complex operation condition by an electric vehicle electric drive system can be realized according to the method.

Description

technical field [0001] The invention relates to an adaptive fault-tolerant control method for accurate torque output of a salient pole permanent magnet synchronous motor (IPMSM) used in electric vehicles, which is used for realizing the precise torque output of the salient pole permanent magnet synchronous motor under complex operating conditions. Background technique [0002] Encouraged by the technical development trend of vehicle power electrification and the national policy of "energy saving, emission reduction and environmental improvement", new energy electric vehicles are one of the key directions for the country's vigorous development. The electric drive system of electric vehicles not only requires high torque output capability and wide speed range, but also has high torque control accuracy. IPMSM has the characteristics of high efficiency, high power density and wide speed range. It is widely used in the electric drive system of electric vehicles. Most of them real...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14
Inventor 李红梅华新强周亚男姚宏洋张恒果
Owner HEFEI UNIV OF TECH
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