brushless dc motor is a kind of synchronous motor, that is to say, the motor rotor speed of the motor speed rotating magnetic field of the stator and rotor pole (P)Effect: N = 120. f / P。 In case the number of rotor fixed, change the frequency of the stator rotating magnetic field can change the speed of the rotor. Brushless dc motor is a synchronous motor with electronic control (Drive), control the frequency of the stator rotating magnetic field and the motor rotor speed feedback to the control center of repeated correction, in order to achieve close to the way the characteristics of dc motor. That is to say, brushless dc motor can be within the rated load when the load changes can still maintain control motor rotor speed. Brushless dc drives including power department and control department as shown in figure (1): power supply provides the three-phase power supply to the motor, and control of the transformation input power frequency in accordance with the requirements. in the number of rotor fixed cases, change the frequency of the stator rotating magnetic field can change the speed of the rotor. Huizhou brushless motor that is, synchronous motor will be combined with electronic control (Drive), control the frequency of the stator rotating magnetic field and the motor rotor speed feedback to the control center of repeated correction, in order to achieve close to the way the characteristics of dc motor. That is to say, brushless dc motor can be within the rated load when the load changes can still maintain control motor rotor speed.
