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Skateboard DC Brushless Motor Structure
Aug 31, 2017

            The brushless DC brushless motor is a kind of synchronous motor, that is to say, the speed of the rotor of the motor is affected by the velocity of the rotating magnetic field and the pole number (p) of the motor stator:Skateboard DC Brushless Motor

            N=60 f/p. When the rotor pole number is fixed, the rotational speed of the rotor can be changed by changing the frequency of the stator rotating magnetic field. Brushless DC motor is the synchronous motor with electronic control (drive), control the frequency of the stator rotating magnetic field and the motor rotor speed back to the control center repeatedly corrected, in order to achieve close to the DC motor characteristics of the way. In other words, the DC brushless motor can control the motor rotor to maintain a certain speed when the load changes within the rated load range.Skateboard DC Brushless Motor

             Brushless DC actuator includes power supply and Control Unit (1): The power supply Unit provides three-phase power supply to the motor, and the control unit converts the input power frequency according to the requirement.Skateboard DC Brushless Motor

             The power supply can be directly input (generally 24v) or AC input (110v/220 v), and if the input is alternating current, the converter (converter) must be converted to direct current. Whether the DC input or AC input is to be transferred to the motor coil before the DC voltage from the converter (inverter) to 3-phase voltage to drive the motor. The converter (inverter) is generally divided into 6 power transistors (Q1~Q6) (Q1, Q3, Q5)/lower arm (Q2, Q4, Q6) connected to the motor as a switch through the motor coil. The control unit provides PWM (pulse width modulation) to determine the switching frequency of the power transistor and the timing of the commutation (inverter) commutation. Brushless DC motor generally want to use when the load changes speed can be stabilized at the set value without too much change in the speed control, so the motor is equipped with induction magnetic field of the Hall Sensor (sensorsignal), as the speed of the closed loop control, but also as the basis for phase sequence control. But this is only used as a speed control and cannot be taken as a positioning control.Skateboard DC Brushless Motor