Permanent magnet synchronous motor torque control method

A technology of permanent magnet synchronous motor and torque control, applied in the field of control

Active Publication Date: 2017-01-25
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a permanent magnet based on driving torque demand estimation and predictive control to solve the compromise optimization of the driver's driving/braking a

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  • Permanent magnet synchronous motor torque control method

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Embodiment Construction

[0083] The platform of the present invention is a wheel-hub electric drive vehicle, and its structure is shown as figure 1 As shown, it mainly includes four independent hub motors 1, 2, 3, 4 (the motors obtain current information and wheel speed information through sensor measurement), four corresponding motor controllers 5, 6, 7, 8, one The vehicle controller 10, and the CAN network 11 that provides communication between the vehicle controller 10 and the permanent magnet synchronous motor controllers 5, 6, 7, 8, and the battery pack 9 provide power for the four motors. The role of the vehicle controller 10 is to obtain the vehicle drive / brake demand rotation speed through calculation according to the driver's real-time drive / brake command and the corresponding four-wheel speed information provided by the motor controllers 5, 6, 7, and 8. moment, and as a reference command for the four motors. The main function of the motor controllers 5, 6, 7, and 8 is to collect speed infor...

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Abstract

The invention discloses a permanent magnet synchronous motor torque control method, belonging to the field of control technology. The invention aims at providing a permanent magnet synchronous motor torque control method for compromising optimization and establishing an optimization problem for the multi-control needs of driver drive/brake and energy efficiency improvement and solving a screening principle to improve the calculation efficiency based on the drive torque need estimation and prediction control. The motor torque prediction control flow comprises the following steps: converting a torque reference value into a motor stator vector current reference value according to a motor equation; establishing a relation between a three-phase inverter on-off state and the output vector voltage; estimating the current value of next time domain; and acting on an inverter drive motor with the optimal on-off combination state. In the torque control method disclosed by the invention, the driver pedal information and wheel speed information are collected, and the drive torque value required by the vehicle is calculated according to the mechanical external characteristic curve of the permanent magnet synchronous motor, then the drive/brake power needs of the driver are effectively met, a reference is provided for follow-up motor control, and the system reliability is improved.

Description

technical field [0001] The invention belongs to the technical field of control. Background technique [0002] Today's new energy vehicles have attracted wide attention from all walks of life for their energy-saving and emission-reducing features, and have been vigorously developed and applied by various countries and even major automobile manufacturers. Especially for hub electric drive vehicles, due to the use of hub motor technology, especially four-wheel hub drive motors, the four-wheel drive force of the vehicle is independently controllable, and the power control of the vehicle is more flexible and convenient, which can effectively improve the performance of electric vehicles in harsh environments. The driving performance is gradually becoming the type of pure electric vehicle with the most development potential in the future. As the main choice of electric vehicle hub drive motors, permanent magnet synchronous motors can meet the requirements of high-performance elect...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/20B60L15/20
CPCB60L15/20B60L2240/423H02P21/0017Y02T10/64Y02T10/72
Inventor 任秉韬徐薇赵海艳赵明星陈虹
Owner JILIN UNIV
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