A five-phase brushless DC motor control method and electric vehicle
A brush DC motor and control method technology, applied in the direction of torque ripple control, etc., can solve the problems of large noise, waste of energy, etc., and achieve the effect of reducing ripple current, reducing noise, and meeting speed requirements
Active Publication Date: 2016-04-13
广东高标智能科技股份有限公司
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[0006] The main purpose of the present invention is to provide a five-phase brushless DC motor control method, which aims to solve the problems of high noise and waste of energy when the existing five-phase brushless DC motor operates under light load
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[0028] In order to make the purpose, principle and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0029] In the present invention, a new operating state is inserted in front of each original operating state of the conduction mode of the five-phase brushless DC motor, and each original operating state runs earlier than the operating state of the original conduction mode For a period of time, it can not only reduce the pulsating current of the motor, but also reduce the noise when the load is light, and its maximum operating speed can be increased by about 20%.
[0030] The present invention is realized in this way. A five-phase brushless DC motor control method includes the following steps:
[0031] A new...
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The invention relates to a five-phase brushless direct current motor control method and an electromobile. The method includes that a new operation state is inserted in front of each original operation state of a connection mode of a five-phase brushless direct current motor with each original operation state operating for a period in advance compared with the original connection mode. The original operation states are that two upper bridge arm switches are switched on, and two lower bridge arm switches are switched on. The new operation states are that one bridge arm switch in four switched-on bridge arm switches in the original operation states behind the new operation states is switched off, and the other three bridge arm switches are still switched on. Ten new operation states are added on the basis of the original ten operation states in four-four connection, the ten new operation states are arranged in front of the original operation states respectively, the original operation states are connected a period in advance, motor pulse current is reduced, noise is reduced during light load, and the highest operation speed is increased about 20%.
Description
Technical field [0001] The invention relates to the field of five-phase motor control for electric vehicles, in particular to a five-phase brushless DC motor control method and electric vehicles. Background technique [0002] The mainstream motors of electric vehicles on the market can be divided into three-phase brushless DC motors and five-phase brushless DC motors. The three-phase brushless DC motors adopt the two-by-two conduction control method, so the efficiency and torque are small, and they enter the saturated state. The speed of the five-phase brushless DC motor is significantly reduced, which affects the battery life; and the five-phase brushless DC motor adopts a four-four-way control method, so the efficiency and torque are significantly increased. When entering the saturation state, the speed will not drop significantly, and the torque will be more than ordinary The three-phase motor is large, the torque pulsation is small, and the load can be started directly withou...
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IPC IPC(8): H02P6/10
Inventor 温瑭玮陈清付陈雅枫
Owner 广东高标智能科技股份有限公司