A Method for Matching the Voltage and Rotational Speed ​​of an Automobile Sunroof DC Motor

Abstract

The invention discloses a matching method for a voltage and a rotating speed of an automobile skylight DC motor, which is characterized in that the matching method comprises the steps that an adjustable DC stabilized voltage supply is connected with the DC motor to adjust the input voltage of the DC motor within a range of 0-20V; an MCU collects a real-time voltage of the DC motor through a voltage conversion sampling circuit, and the MCU collects a converted Hall time of the DC motor through a Hall detection unit. By adopting the above method, the data of the rotating speed under a set voltage is matched according to the rotating speeds at different voltages, the converted data is scarcely influenced by the voltage within a short period of time, and thus the data consistency is good; and design certification is carried out on an anti-pinch software algorithm at the set voltage to provide data support. By adopting the matching method disclosed by the invention, the design of the anti-pinch software algorithm is simplified, the fluctuation of the voltage does not need to be considered, and the probability of mistaken pinching is reduced.

Description

technical field [0001] The invention relates to the optimization and improvement of a direct current motor of an automobile sunroof, in particular to a method for matching the voltage and the rotational speed of the direct current motor of an automobile sunroof. Background technique [0002] For car sunroof manufacturers, there will be many problems in realizing the anti-pinch function of the sunroof. One of the important problems is how to deal with the relationship between the speed and voltage of the brushed DC motor. [0003] During the operation of the sunroof, the sunroof ECU determines the motor speed by collecting the Hall signal; under different voltages, the motor speed is different. If the voltage of the DC motor fluctuates greatly in a short time, it will cause the motor speed to fluctuate greatly. In this case, if the relationship between the motor speed and voltage is not dealt with, it will cause false anti-pinch, and if it is handled incorrectly, it will als...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for matching the voltage and rotation speed of the sunroof DC motor, which solves the situation of accidental pinch prevention caused by voltage fluctuations or failure to prevent pinch when encountering obstacles during the operation of the sunroof.

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