Design and Implementation of Constant Speed and Torque Control Device for Three-Phase DC Motors
In order to meet the requirements of motor speed and torque control for dental implant surgery equipment,and ensure that the motor can rotate at a constant speed when encountering different resistances during the surgery,a three-phase DC motor constant speed and torque control design scheme is proposed.This scheme uses the STM32 embedded processor to control the MOS circuit bridge to drive the precise commutation of U,V,and W of the three-phase DC motor.The torque data of the motor is fed back through the current sampling circuit,using incomplete differential PID and FOC algorithms to adjust the speed of the motor,and a visual operation interface is provided through the touch screen.The results show that the control device is easy to operate,with precise torque and speed control,avoiding fluctuations in motor speed caused by changes in resistance during surgery,which can affect the surgical effect.
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