Brushless dc motor controller of motor controller itself is electromechanical energy conversion part, it besides the armature, permanent magnet motor controller excitation two points, also with sensors. Below to introduce the application principle of the brushless dc motor controller. Motor controller itself is the core of the brushless dc motor controller, it is not only related to the performance index, noise, vibration, reliability and service life, etc. , also involves manufacturing capability and product. Because use permanent magnet magnetic field, make the brushless dc motor controller get rid of the traditional design of general dc motor controller and structure, meet the requirements of various applications market, and development in the direction of the province copper material saving, simple and convenient manufacturing. Commutation of the brushless dc motor controller consists of two parts, drive and control circuits, the two parts are not easily separated, especially small power circuit integration between the two usually become single application-specific integrated circuit. To realize the control of motor speed controller must have a speed signal. With similar position signal obtained speed signal, the simplest speed sensor is measuring frequency type tachogenerator controller combined with electronic circuits. Commutation of the brushless dc motor controller consists of two parts, drive and control circuits, it is not easy to separate the two parts, especially small power circuit integration between the two usually become single application-specific integrated circuit. Brushless dc motor controller in order to reduce the moment of inertia, usually adopt the structure of 'thin'. Brushless dc motor controller on the weight and volume than a much smaller brush dc motor controller, the corresponding rotational inertia can reduce 40%About 50%. Because of the permanent magnetic material processing problems, the brushless dc motor controller general capacity are below 100 kw. That the mechanical properties of the motor and regulating characteristics of good linearity, wide speed range, long service life, convenient maintenance noise small, does not exist a series of problems caused by brush, so this kind of motor in the control system has great application potential.
