A method for suppressing electromagnetic interference of a controller of a vehicle motor

An electromagnetic interference and controller technology, which is applied in the direction of motor generator control, electronic commutation motor control, electromechanical brake control, etc., can solve problems such as large electromagnetic interference, reduce current harmonic content, reduce external electromagnetic interference, and suppress Effects of Electromagnetic Interference
CN104124864BActive Publication Date: 2018-08-24YADEA TECH GRP CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
YADEA TECH GRP CO LTD
Publication Date
2018-08-24

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Abstract

The invention relates to the field of vehicle electrical motors, in particular to an electromagnetic interference suppression method for a controller of a vehicle electrical motor. The electromagnetic interference suppression method comprises the following steps: embedding magnetic resistance materials in a notch of the vehicle electrical motor so that the vehicle electrical motor is at a flux weakening state; increasing a decoupling capacitor between the power supply of each integrated circuit of a controller and the ground, and bridging an electrolytic capacitor at the input end of the power supply; applying a soft-switching technology so as to carry out the status switching of a switching element during zero voltage and zero current of a switch; correcting the current waveform of the power supply so as to reduce the content of current harmonics and reduce the external electromagnetic interference of the power supply. The magnetic resistance materials are fixed in the notch of the vehicle electrical motor, and through the PCB (Printed Circuit Board) wiring design and the controller design, the electromagnetic interference of the controller of the vehicle electrical motor is effectively inhibited.
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Description

technical field

[0001] The invention relates to the field of vehicle motors, in particular to a method for suppressing electromagnetic interference of a controller of a vehicle motor. Background technique

[0002] In the operation of existing vehicles, EMC (Electro Magnetic Compatibility, Electromagnetic Compatibility, Electromagnetic Compatibility) has seriously exceeded the standard phenomenon. Many vehicle manufacturers, due to their small scale, limited production capacity, serious lack of technology development and technical reserves, have no concept of EMC , put EMC, which has a serious impact on people's health, into the back of our minds. Once there is a test need, we usually use cable coating, adding magnetic beads, magnetic rings, etc. to deal with it temporarily. At the same time, this method is expensive and difficult for ordinary workers to operate. And not easy to grasp.

[0003] The electromagnetic interference sources of the BLDC (Brushless Direct Current Mo...

Claims

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