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Locked rotor detection method and device

A detection method and current threshold technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of reducing the reliability of the protection scheme of the motor, missing detection, and failing to effectively protect the motor, and achieve effective protection and improvement. The effect of reliability

Active Publication Date: 2016-11-16
BEIJING JINGWEI HIRAIN TECH CO INC
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Problems solved by technology

[0004] In view of this, the present application proposes a locked-rotor detection method and device to solve the situation that the current threshold method is used in the prior art to perform locked-rotor detection, resulting in missed detection, which cannot effectively protect the motor and reduces the cost of the motor protection scheme. Reliability Technical Issues

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  • Locked rotor detection method and device

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Embodiment Construction

[0063] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0064] This embodiment discloses a stall detection method, see figure 1 shown, including:

[0065] Step S11: Obtain the real-time current of the motor and the ripple signal of the real-time current of the motor.

[0066] The real-time current acquisition method of the current can be that the current acquisition circuit collects the voltage of the small resistor in series in the motor circuit, amplifies the voltage and performs digital-to-analog conversion, collects the voltage valu...

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Abstract

The invention discloses a locked rotor detection method and device. Real-time locked rotor detection is performed on a motor by using the locked rotor detection method based on the current threshold; meanwhile, the locked rotor detection method based on the ripple is started to perform real-time locked rotor detection when real-time current is greater than the current threshold of normal operation of the motor. That is to say, real-time locked rotor detection is performed on the motor by using the locked rotor detection method based on the current threshold and the locked rotor detection method based on the ripple simultaneously when the real-time current of the motor is greater than the current threshold of normal operation of the motor. As for locked rotor detection performed on the motor by using the locked rotor detection method based on the ripple, the detection process is based on generation of new ripple pulses in the ripple signals within preset time rather than the current threshold. Therefore, the detection method based on the ripple signals can be used for effective supplementing when setting of the current threshold of the locked rotor detection method based on the current threshold is inaccurate and the situation of leak detection exists so that effective protection for the motor can be realized and reliability of the protection scheme for the motor can be enhanced.

Description

technical field [0001] The present application relates to the technical field of automobile body control, and more specifically, relates to a stall detection method and device. Background technique [0002] With the advancement of modern automotive electronics technology, the traditional parts and assemblies in the car are also developing towards mechatronics. A large number of electronic devices used in automobiles not only improve the comfort of the car, but also put forward new requirements for the safety of the car. For the convenience of drivers and passengers, a large number of cars use electric windows. In addition, there is a window anti-pinch system, which is used to make the window automatically stop or fall after the object or human body is clamped during the rising process of the window and reaches a certain strength, so as to prevent the object or human body from being pinched. [0003] In order to prevent the motor from being locked up during the raising or l...

Claims

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Application Information

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IPC IPC(8): G01R31/34
CPCG01R31/343
Inventor 刘爽贾晟彭晓光
Owner BEIJING JINGWEI HIRAIN TECH CO INC
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