Control method and apparatus for direct current motor of car body closing system

Abstract

The invention provides a control method and apparatus for a direct current motor of a car body closing system. The control method comprises the steps of obtaining positions of the car body closing system and target rotary speeds of the direct current motor corresponding to the positions; obtaining an actual rotary speed of the direct current motor; and calculating a first PWM duty ratio and outputting the duty ratio according to the target rotary speeds and the actual rotary speed. The positions of the car body closing system comprise a starting region, a uniform motion region and a stopping region; and the target rotary speeds of the direct current motor corresponding to the starting region and the stopping region are both less than the target rotary speed of the direct current motor corresponding to the uniform motion region, so that the actual rotary speed of the direct current motor is changed slowly and smoothly, and the noise generated by the movement of the car body closing system is relatively low. According to the control method and apparatus, by regulating the PWM duty ratio, a driving voltage supplied to the direct current motor of the car body closing system by a vehicle-mounted storage battery is adjusted, and the rotary speed of the direct current motor of the car body closing system is adjusted, and the movement speed of the car body closing system is controlled, so as to further lower noise in the movement of the car body closing system and improve use comfort degree of a user.

Description

technical field [0001] The invention relates to the field of automobiles, more specifically, to a control method and device for a DC motor of a vehicle body closing system. Background technique [0002] Currently, cars generally use electric body closure systems. The body closing system refers to the equipment with closing function on the car, such as doors, windows, sunroofs, side sliding doors or backup doors, etc. The electric body closing system refers to the use of DC motors to control the movement of the body closing system, which is easy to operate. The power source of the DC motor is the on-board battery, and the voltage of the battery is relatively high. As a result, the running speed of the DC motor is too fast, which causes the movement of the moving parts of the body closing system such as the sunroof to be too fast, and the noise generated during the movement is relatively high. Large, reducing user comfort. Contents of the invention [0003] In view of thi...

AI Technical Summary

Problems solved by technology

The power source of the DC motor is the on-board battery, and the voltage of the battery is relatively high. As a result, the running speed of the DC motor is too fast, which causes the movement of the moving parts of the body closing system such as the sunroof to be too fast, and the noise generated during the movement is relatively high. Large, reducing user comfort

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