Method and device for detecting blocking rotation of direct current brush motor

A DC brushed motor and detection method technology, applied in the direction of circuit devices, emergency protection circuit devices, emergency protection detection, etc., can solve the problems of increased workload, poor practicability and reliability, and prone to false detection, etc., to achieve Low cost, reduced calibration workload, improved practicability and reliability

Active Publication Date: 2019-04-26
BEIJING JINGWEI HIRAIN TECH CO INC
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Problems solved by technology

A locked-rotor detection method based on the magnitude of the current. When it is recognized that the actual current is greater than the set current threshold and lasts longer than the set time, it is judged that a locked-rotor has occurred and the motor is stopped; however, the current threshold of this scheme is preset The fixed value of the calibration needs to be calibrated for t

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  • Method and device for detecting blocking rotation of direct current brush motor
  • Method and device for detecting blocking rotation of direct current brush motor
  • Method and device for detecting blocking rotation of direct current brush motor

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Embodiment Construction

[0061] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0062] Motor stall is generally defined as: when the motor speed is zero, the torque is still output. When the motor is locked, the voltage at both ends of the motor is completely loaded on the internal resistance of the coil with a small resistance, which generates a large current. In the specific embodiment of the present invention, the locked-rotor judgment is made from two aspects. One is that the current of the brushed DC motor exce...

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Abstract

The invention discloses a method and device for detecting blocking rotation of a direct current brush motor, wherein the method comprises the following steps: in each starting stage of the direct current brush motor, the blocking rotation detection threshold value is obtained according to the current starting characteristic analysis of the direct current brush motor, and the detection is carried out according to the blocking rotation detection threshold value in the subsequent blocking rotation detection. As the current starting characteristic of the direct current brush motor is analyzed during each starting process of the direct current brush motor to obtain the blocking detection threshold value, the blocking detection threshold value can be suitable for the direct current brush motor under different temperatures and voltages, thereby improving the practicability and the reliability of the technical scheme, and reducing the calibration workload due to no need of calibrating each direct current brush motor.

Description

Technical field [0001] The present invention relates to the technical field of motors, and more specifically, to a method and device for detecting locked-rotor of a DC brushed motor. Background technique [0002] With the development of automobile technology, a large number of components controlled and driven by DC brush motors are widely used to improve the comfort of vehicle operation. Such as the electric opening and closing of moving parts such as sunroofs, doors and windows, rearview mirrors, seats, etc., driven by motors. On the one hand, during the movement of the above-mentioned moving parts, it is necessary to perform a locked-rotor judgment; on the other hand, when the above-mentioned mechanism is initialized to learn the zero position, a locked-rotor judgment is also required to avoid long-term locked-rotor causing excessive current and motor Overheating damages the motor or the corresponding control circuit. [0003] At present, there are a variety of locked-rotor det...

Claims

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Application Information

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IPC IPC(8): H02H1/00H02H7/085
CPCH02H1/0007H02H7/085
Inventor 刘爽贾晟
Owner BEIJING JINGWEI HIRAIN TECH CO INC
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