Patent ID: 8957608
Filing Date: 2015-02-17
Classification: H02P

Abstract:
1. A motor-driving device of an electric caulking gun comprising: a micro-controller unit (MCU) built in with a speed determination procedure comparing a speed of a motor with a preset speed and outputting a speed signal; a direction-changing module electrically connected to the MCU and the motor, and receiving the speed signal to control the speed of the motor; a forward and rewind signal amplification module connected in series between the MCU and the direction-changing module, receiving forward and rewind speed signals from the MCU and outputting the forward and rewind speed signals to the direction-changing module after inverting amplification; a power supply module electrically connected to the MCU and the direction-changing module to supply an operating power to the MCU and the direction-changing module; a power switch unit connected in series between the power supply module and the MCU to switch power on or off and set up the speed of the motor; a circuit breaker and a rectification module connected in series between the power switch unit and the MCU, wherein the circuit breaker has a transistor connected in series between a positive electrode of the power supply module and the rectification module and connected to the MCU through another transistor, and the rectification module has a voltage regulation IC; and a speed sensor electrically connected to the MCU and the motor, detecting the speed of the motor and outputting the speed of the motor to the MCU.