of the brushless dc motor controller design features and operation characteristics of brushless dc motor consists of the ontology of the motor and drive, is a typical mechatronics product. Controller of brushless dc motor stator winding into a three-phase symmetric star line connection, with three-phase asynchronous motor is similar to the controller. Rotor brushless dc motor controller consists of ndfeb permanent magnet materials. In the stator of north - air gapSouth and white square wave magnetic field, so the brushless dc motor controller is also called 'square wave motor controller'. In order to make the winding brushless dc motor controller accurate reversing, within the brushless dc motor controller with position sensor, as the rotor position signal polarity. Drive: single film as control center; As electronic commutation composed of IGBT or MOSFET inverter bridge; - as a voltage typeStraight -In the rectifier, filter unit of main circuit; As the keyboard and digital display unit of man-machine interface; As a control, driving power supply of switch power supply. High efficiency: rotor brushless dc motor controller without copper loss also have no loss of carbon brush, the efficiency increased by 5% - than with the capacity of asynchronous motor12%. High power factor: brushless dc motor controller without exciting current from the power grid, the power factor is close to 1. Large starting torque, small starting current, the mechanical characteristics and regulation of brushless dc motor controller features with a separately excited dc motor controller pivot point corresponding characteristics are similar, so its large starting torque, small starting current, the adjusting range is wide, but no faults caused by brush commutation, electronic commutation to replace the mechanical commutation. High output power brushless dc motor controller: the volume of a brushless dc motor controller and maximum working speed at the same time, the asynchronous motor power output increased by 30%. Adaptable: supply voltage deviation rating + or - 10%15%, the environment temperature 40 k and load torque from 0 -100% rated torque ripple, the actual speed of brushless dc motor controller and setting speed deviation, the steady state is not greater than the set speed plus or minus 1%. Brushless dc motor controller is a kind of automatic control speed regulation system, it is no need to start the winding like a normal synchronous motor controller; When the load mutation, won't produce oscillation and step out. Brushless dc motor controller with dc motor controller, ac asynchronous motor controller features of structure. Brushless dc motor controller is suitable for low speed for a long time, frequent start, this is normal ac frequency conversion speed governor motor controller can realize the use of the occasion.
