Brushless motor controller belongs to ac motor controller, which is a kind of three-phase ac permanent magnet motor controller, input model of the brushless motor controller 3 wire current is the alternating current (ac), but it is not a 50 hz ac mains of sine wave, but out of the brushless motor controller modulation controller of three-phase alternating rectangular wave, the frequency is higher than 50 hz, and the changes over the motor controller speed. In simple terms, rely on the change of input to the brushless motor controller on the stator coil of alternating current wave frequency and waveform, around the winding coil to form a motor controller geometry axis rotating magnetic field, the magnetic field driving permanent magnet on the rotor magnet steel, motor controller turned up and the performance of the motor controller and a number of magnetic steel, magnetic steel, magnetic flux intensity, and the size of the motor controller input voltage and other factors, more and the control of the brushless motor controller performance has much to do, because the input is the direct current, current need electronic governor turned it into three phase alternating current (ac), also need to receive control signal from the remote control receiver, control the turning speed of the motor controller, to meet the needs of the model using.