Brushless dc motor is composed of main body of the motor and drive, is a typical mechatronics product. With the development of industrial level, the brushless dc motor due to the working efficiency, high reliability, is becoming more and more widely applied in industry. Small make up today will introduce brushless dc motor for you with the main difference between carbon brush motor, friends come and look at! : 1, scope of application: brushless motor is often used in the control demands high speed high device, such as model aircraft precision instrument strict rotation speed of the motor speed control to achieve high equipment business. 碳刷电机：通常动力设备使用的都是有刷电机，另外串激电机的转速也能达到很高但是由于碳刷的磨损使用寿命不如无刷电机。 2 、使用寿命： 无刷电机：通常使用寿命在几万小时这个数量级但是由于轴承的不同无刷电机使用寿命也有很大不同。 碳刷电机：通常有刷电机的连续工作寿命在几百到1千多个小时到达使用极限就需要更换碳刷不然很容易造成轴承的磨损。 3, use effect: brushless motor, are usually digital frequency conversion control, controllability is strong, from a few rotations per minute (RPM), to the tens of thousands of revolutions per minute can be very easy to implement. Carbon brush motor, brushless motor general after starting work speed constant, speed is not very easy, can reach 20000 r/s series motor, but life is short. 4, energy-saving aspects: relatively, brushless motor than series motor is controlled by frequency conversion technology energy saving a lot of, the most typical is the frequency conversion air conditioning and refrigerator. 5, servicing in the future, need to replace carbon brush carbon brush motor, if the change is less than when causes the damage of the motor, brushless motors, long service life and is usually has more than 10 times of brush motor, but need to replace the motor is broken, but basic don't need daily maintenance. 6, noise has nothing to do with whether a brush motor, main is to look at the bearing and click on the matching of the internal components. A motor is refers to the motor is dc input, controls the size of the controller only give it its current can speed; And brushless motor is actually a three-phase ac motor, controller to convert the dc to three-phase alternating current (ac), and according to the hall element sensor in the motor commutation make motor run properly. Direct, brushless motor brush than to have long life, strong start save electricity, but higher than brush controller cost controller.
