A field weakening control method of brushless motor based on electronic brake system
A brushless motor and field-weakening control technology, which is applied in the direction of electronic reversing motor control, motor generator control, motor control, etc., can solve the problems of unable to brake the car in time, heavy pedals, etc., to avoid heavy foot feel, The effect of improving perceived quality
Inactive Publication Date: 2019-01-08
上海拓为汽车技术有限公司
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Problems solved by technology
When the driver steps on the pedal to avoid obstacles in an emergency, the motor needs to provide a large speed instantly, but the motor cannot continue to rise after reaching a certain speed in a short time, so when the driver steps on the brake quickly, the pedal will become bulky The feeling that leads to the inability to brake the car in time
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[0017] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.
[0018] The embodiment of the present invention relates to a brushless motor field weakening control method based on an electronic braking system. Under the condition of a motor vector control system, such as figure 2 As shown, it adds a field-weakening speed-up module before the current loop module. The field-weakening speed-up module can adjust the command signal of the current loop in real time according to the motor s...
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The invention relates to a field weakening control method of a brushless motor based on an electronic brake system. Under the condition of a motor vector control system, a field weakening speed increasing module is added in front of a current loop module. The weak magnetic field speed increasing module adjusts the command signal of the current loop according to the motor speed and the torque demand in real time during the working period of the intelligent braking system, judges whether the current situation is fast braking or not, and if the motor speed exceeds the rated speed, the weak magnetic field compensation is carried out to increase the motor speed. The invention can avoid the phenomenon that the foot feeling becomes heavier when stepping on the brake when driving, even pauses without assistance, and the like, so as to improve the perceptual quality of the driver.
Description
technical field [0001] The invention relates to the technical field of intelligent braking, in particular to a brushless motor field weakening control method based on an electronic braking system. Background technique [0002] The braking of traditional internal combustion engine vehicles needs to rely on vacuum boosters, and the engine provides the required vacuum source. But for new energy vehicles, it does not have an engine to provide vacuum, so it loses the vacuum source, so it can only provide vacuum through an independent electronic vacuum pump to complete the braking action, but the electronic vacuum pump needs to run continuously, which consumes more fuel. At the same time, once the electronic vacuum pump fails, the entire braking system will lose vacuum boost, which will affect reliability. The Intelligent Braking System (IBS) does not require a vacuum to provide assistance, but only relies on the motor to bring sufficient assistance and shorten the braking distan...
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Patent Timeline
Login to View More IPC IPC(8): H02P21/00H02P21/22H02P25/026H02P27/08
CPCH02P21/0089H02P25/026H02P27/08H02P2205/01H02P2205/07H02P21/22H02P25/03
Inventor 秦伟唐文金军郑鸿云蒋开洪
Owner 上海拓为汽车技术有限公司