Five-phase brushless direct current motor control method and electromobile
A brushed DC motor and control method technology, applied in the direction of excitation or armature current control, can solve the problems of wasting energy and high noise, and achieve the effects of reducing noise, reducing pulsating current, and increasing operating speed
Active Publication Date: 2014-05-21
GUANGDONG GOBAO ELECTRONICS TECH CO LTD
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Problems solved by technology
[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 present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, 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 operates earlier than the original operating state of the conduction mode For a period of time, not only can reduce the pulsating current of the motor, but also reduce the noise at light load, and its maximum operating speed can be increased by about 20%.
[0030] The present invention is achieved in that a five-phase brushless DC motor control method comprises the following steps:
[0031] A new running ...
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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 of an electric vehicle, in particular to a five-phase brushless DC motor control method and an electric vehicle. 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 are in a saturated state due to the two-two conduction control method, and the efficiency and torque are too small. The rotating speed drops obviously, which affects the endurance time of the battery; while the five-phase brushless DC motor adopts the four-four conduction control method, the efficiency and torque are obviously increased, and the rotating speed will not drop significantly when entering the saturation state, and the torque will also be higher than that of ordinary motors. The three-phase motor is large, the torque ripple is small, the load can be started dir...
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IPC IPC(8): H02P7/28
Inventor 温瑭玮陈清付陈雅枫
Owner GUANGDONG GOBAO ELECTRONICS TECH CO LTD