brushless motor a plate refers to the brushless dc motor by the motor, it consists of main body and the drive, is a typical mechatronics product. Because of brushless dc motor based on automatic running, so will not like the synchronous motor frequency control of motor speed under overload start plus startup winding on the rotor, also won't generate oscillation and step out when load mutation. Medium and small capacity of the permanent magnet brushless dc motor (BLDCM), now many rare earth ndfeb material using high magnetic energy product. Therefore, the volume of rare earth permanent magnet brushless motor than three-phase asynchronous motor with capacity reduces a brushless dc motor machine base number. Scope of application: brushless motor, is often used in the control request is higher, higher speed of devices, such as model aircraft, precision instruments and meters, etc for motor speed control strictly, spins at very high device. Service life: brushless motor, usually life in tens of thousands of hours in the order of magnitude, but due to the different bearing brushless motor service life are quite different. 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. 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. , maintenance aspects 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. Noise aspect has nothing to do with whether a brush motor, main is to look at the bearing and motor with the internal components. The parameters of the model of the brushless motor, in addition to the physical dimension (Diameter, length, diameter of axle, etc. ), weight, voltage range, no-load current, maximum current and other parameters, also an important indicator-KV value, this value is unique to the brushless motor of a performance parameter, is brushless motor performance characteristics of an important data.