The similarities and differences between DC brushless motor and AC motor
Although the DC motor is supplied by direct current, the coil inside the rotor is still in the AC circuit. A live brush DC motor is commutated by an electric brush. And brushless motor is through the inverter circuit to DC into AC, and then to the coil. 12V cooling fans are common. It's commonly used in mainframe computers.AC motor does not need commutator (brush). Generally, permanent magnets are not needed. It would be nice to want to know more about buying a book on the principles of the motor
The stator windings of Brushless DC motor is connected in star, his permanent magnet rotor is made and a rotor position sensor for detecting the rotor position feedback to the controller, the controller is a DC power supply, according to the position sensor signal feedback respectively so that the stator winding is energized, the rotating magnetic field, the mechanical characteristics of Brushless DC the motor is hard.
Brushless DC motor, the actual result is essentially different from AC motor, it is the direct current through the electronic oscillation circuit into alternating current, the frequency is generally adjustable, used to change the speed.
