说明：  BLDC motor control is required to understand the motor rotor position and steering mechanism of rectifier. For the closed-loop speed control, there are two additional requirements, namely for the rotor speed \ / or motor current and PWM signals were measured, in order to control the motor speed power.
(BLDC motor control is required to understand the motor rotor position and steering mechanism of rectifier. For the closed-loop speed control, there are two additional requirements, namely for the rotor speed \/or motor current and PWM signals were measured, in order to control the motor speed power. )