Structure of Customized mini brushless motor
DC brushless motor is a kind of synchronous motor, that is to say, the speed of motor rotor is affected by the speed of motor stator rotating magnetic field and the number of rotor poles (P):
n=60．f / p。 When the number of rotor poles is fixed, the speed of rotor can be changed by changing the frequency of stator rotating magnetic field. The BLDCM is to add the synchronous motor and electronic control (driver) to control the frequency of the stator rotating magnetic field and return the speed of the motor rotor to the control center for repeated correction, so as to achieve the approach to the characteristics of the DC motor. That is to say, the DC BLDCM can control the rotor to maintain a certain speed when the load changes within the rated load range.
The DC brushless drive includes the power supply unit and the control unit as shown in figure (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 demand.
