Torque distribution method of permanent magnet synchronous motor for electric bus based on optimal efficiency
A technology of permanent magnet synchronous motor and torque distribution method, which is applied in multiple motor speed/torque control, motor generator control, electric vehicles, etc., and can solve the problems of low overall efficiency and the inability to guarantee the highest state of motor efficiency, etc. Achieve the effects of low torque ripple, widening the high efficiency range, and high current frequency response
Active Publication Date: 2020-04-14
苏州市蹀尊新能源科技有限公司
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Problems solved by technology
The traditional torque distribution method is generally torque equalization, that is, the total torque of the motor is evenly distributed to each stator plate to obtain the corresponding stator current. This method cannot ensure that the motor is always working at the highest efficiency state, making the overall efficiency low
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[0038] In order to make the above objects, features and advantages of the present invention more obvious and comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0039] In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.
[0040] Second, "one embodiment" or "an embodiment" referred to herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. "In one embodiment" appearing in different places in this specification does not all refer to ...
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The invention discloses a permanent magnet synchronous motor torque distribution method for an electric bus based on optimal efficiency. According to the invention, a BP neural network is applied to disk type motor torque distribution and current control is performed through dead beat-free prediction control. The method comprises the following steps of: by taking multi-stator-multi-rotor multi-disc permanent magnet synchronous motor as an example, on basis of previously studied torque equalization, the optimal output torque of each stator disc in the multi-disc stator is obtained by applying a torque distribution method with the highest efficiency obtained through BP neural network optimization; the two input quantities of an input layer are the total torque T and the rotating speed omega respectively; the three quantities of an output layer are the torque distribution coefficients of the stator discs respectively; and for a motor driving control module, dead beat-free current prediction control is adopted to improve the response speed of a motor current loop and reduce errors. Compared with the prior art, the dynamic response and steady-state response capability of the motor current loop can be improved, the operation efficiency of the electric vehicle can be enhanced, and the endurance mileage can be increased.
Description
technical field [0001] The invention relates to the technical field of permanent magnet synchronous motors, in particular to a method for torque distribution of permanent magnet synchronous motors for electric buses based on optimal efficiency. Background technique [0002] Compared with buses powered by internal combustion engines, electric buses have many advantages, such as low vibration and noise, simple structure, high power transmission efficiency, easy vehicle layout, spacious and flat passenger compartment, and excellent power performance. The selection of drive motors for pure electric buses must meet the dynamic requirements of the vehicle, such as maximum speed, acceleration performance, and maximum gradeability. [0003] Compared with the traditional radial flux motor, the axial flux permanent magnet synchronous motor has the advantages of low speed, high torque and high energy density, and is suitable for electric buses. The traditional torque distribution meth...
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IPC IPC(8): H02P6/04H02P6/10H02P6/28H02P21/00B60L15/20
CPCB60L15/2045H02P6/04H02P6/10H02P6/28H02P21/0014Y02T10/64Y02T10/72
Inventor 赵剑飞俞涛刘廷章杨兴武王爽
Owner 苏州市蹀尊新能源科技有限公司