when the dc motor control technology, a novel dc motor, dc motor control technology is developing rapidly, the main digital control, sensorless control of brushless dc motor, both have their own characteristics.
digital control
digital control system based on microprocessor as the core, can achieve high complexity and high precision control, unthinkable. With the emergence of microelectronics technology, inductive outside brushless motor, microprocessor and the improvement of computing speed, the development of computer software, automatic control system with digital processing is given priority to, with digital control system as the core, with high speed digital processing as the core. Due to the advantages of small volume, easy to realize, the digital control system, is not only a general control, vector control method, the nonlinear robust control, fuzzy control can be realized.
sensorless brushless dc motor control
the subject position of a dc motor is cancelled, all hardware electronic switch circuit, to reduce the volume and the cost of the dc motor. Because each stage and the reversing time of conductive winding can no longer depend on the position sensor signal, the dongguan model aircraft brushless motor, thus increasing the control circuit of the magnetic pole position detection circuit, the motor stop or low speed, the rotor position signal accurately, generally difficult to detect, so also need a special sensorless brushless dc motor starting circuit, and the other with position sensor brushless dc motor.