Brushless dc motor is good to keep the traditional dc motor speed control performance and has no sliding contact and commutation spark, high reliability, long service life and low noise advantages, thus in the aerospace, nc machine tools, robots, electric cars, computer peripheral equipment and household appliances, etc, have been widely used. The following detailed to introduce the advantages of brushless dc motor. , brushless dc motor, because has the characteristics of a dc motor drive and frequency change device at the same time, so also known as dc frequency conversion, the operation efficiency of brushless dc motor, the torque at low speed and precision of speed is more good than any of the control technology of inverter, the brushless dc motor based on automatic control type to perform, so don't like frequency control of motor speed synchronous motor overload start under plus startup winding on the rotor, also won't generate oscillation and step out when load mutation. , the permanent magnet brushless dc motor, now rare earth ndfeb material using high magnetic energy product. As a result, the volume of rare earth permanent magnet brushless motor than three-phase asynchronous motor with capacity reduces a frame number. , brushless dc motor of high efficiency, high efficiency area is big, the power and torque density, high power factor (COSΦ）Close to, the system efficiency & gt; %, permanent magnet brushless dc motor rotor are synchronized operation under any circumstances, ac variable frequency motor is frequency control, brushless dc motor speed regulation of frequency conversion, motor running under synchronous speed, rotor have neither copper loss and iron loss. , brushless dc motor with low voltage characteristic, torque overload characteristic is strong, big start torque, small startup current, etc. , wide speed range, the motor can run tall in the low speed range. , overload capacity is strong, can meet the needs of the vehicle bumps blocked. Regenerative braking effect is good, when the car downhill or brake motor generator can be completely into the state, to recharge the battery, the electric braking effect at the same time, reduce the financial burden on mechanical brake. Small volume, light weight, high power motor, which can effectively reduce weight, save a space. No mechanical commutator, motor, USES the totally enclosed structure, prevent dust from entering the motor internal, and high reliability. Simple than asynchronous motor, motor control system. To see so many advantages, of course, brushless dc motor will have its corresponding faults, brushless dc motor must be equipped with corresponding dc motor speed regulator to work, this is nothing but would increase the cost of the work, just for the motor commutator will be higher than the cost of carbon brush, alone with only the cost of brushless motor will be higher than a brush motor. And if you use the occasion is a high magnetic field, the motor itself is the rotor magnet do, under the action of high magnetic field will change the part off the rotor's magnetic field or magnetic field, will be the motor can't work properly.
