Motor abnormal detection circuit and control method thereof

Abstract

The invention discloses a motor abnormality detection circuit and a control method thereof. The circuit comprises a master control chip; a first detection circuit; and a second detection circuit; the first detection circuit is connected with the input end of the master control chip and used for sampling the current of a DC bus of a motor controller, and providing an input voltage signal; the second detection circuit is connected with the output end of the master control chip and used for determining a motor overload state according to the input voltage signal provided by the first detection circuit; the master control chip is used for controlling the on-off of the motor according to the motor overload state determined by the second detection circuit. Through the adoption of the motor abnormality detection circuit, the problem that the motor security is bad since the overload detection risk possibly exists after the motor production in the prior art is solved, the security of the motor running is improved; and furthermore, the delivery reject ratio of the motor can be reduced, and the production reliability of the motor product is improved.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a motor abnormality detection circuit and a detection control method thereof. Background technique [0002] After the controller completes placement on the production line, it is usually inspected for soldering and component anomalies. Currently, the mainstream detection method is ICT testing. The ICT test can check out component solder joints, missing solder joints, and at the same time check out whether the components soldered on the circuit board are damaged or not. At present, for the built-in controller of DC brushless motor, ICT test will also be carried out after the placement is completed. After the test is passed, the pins of the high-voltage device are coated with insulating silicone, and the entire circuit board is coated with conformal paint, and then packed and shipped to the motor. Assembly production line, and then a series of operations such as assembly, t...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a motor abnormality detection circuit and its detection and control method to at least solve the problem in the prior art that there may be an overload detection risk after the motor is produced and affect the safety of the motor.

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