Direct current brush motor stalling detection device and method

Abstract

The invention discloses a direct current brush motor stalling detection device and method. The device includes a direct current motor, a moving part and a detection module; the detection module includes a control chip, a motor driving chip, an ADC conversion module and a resistance network; the control chip is connected to the direct current motor through the motor driving chip; the direct currentmotor is connected to the moving part; the control chip is connected to the resistance network through the ADC conversion module; and the motor driving chip is connected to the resistance network. The device and method are simple in structural principle; fast detection can be performed when the stalling of the motor occurs; and the motor can be controlled to stop or brake, so that the motor can be prevented from continuously stalling to generate faults such as structural stuck and damages.

Description

Technical field [0001] The invention relates to the technical field of motor stall detection, in particular to a DC brush motor stall detection device and method. Background technique [0002] At present, the mechanical transmission of locks in the electronic lock industry is mainly driven by DC brush motors. Brushed DC motors are widely used in the electronic lock industry due to their reliability, stability, and low cost. The DC brushed motor is driven by the H-bridge motor drive chip. In practical applications, the motor drives the running parts to run, especially when the linear rigid running reaches the limit of the running parts, there will be a situation where the running cannot be continued and a stall will occur, or an abnormal stall will occur in the middle of the run. If this blocking phenomenon occurs, if the motor is not stopped in time (such as parking or braking operation), the motor and the running parts will be damaged if the motor continues to be locked, or th...

AI Technical Summary

Problems solved by technology

In practical applications, the motor drives the running parts to run, especially when the linear rigid running reaches the limit of the running parts, there will be no further running and stalling occurs, or abnormal stalling occurs in the middle of the operation

If this stalling phenomenon occurs, if the motor is not stopped in time (such as parking or brake operation), the motor will continue to be blocked, which will damage the motor and running parts, or the running parts will get stuck and cause the product to fail.

The usual motor stall detection is realized by using an operational amplifier or a dedicated current detection chip with an ADC circuit, and the circuit is complex and costly

Ordinary stall detection circuit directly detects the current of the motor drive line, and judges whether the motor is stalled or not by the magnitude of the current value of the motor. It needs to use an op amp or a dedicated current detection chip to cooperate with the ADC circuit. The circuit is complicated and the cost is high.

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