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Changzhou High-Efficiency Motors Co., Ltd.
Changzhou High-Efficiency Motors Co., Ltd.

The Advantage of BLDC Motor and Its Use Error

Ⅰ. About BLDC motor


The brushless DC motor uses semiconductor switching devices to realize electronic commutation, that is, electronic switching devices replace the traditional contact commutator and brush. It has the advantages of high reliability, no commutation spark, low mechanical noise, and is widely used in high-grade recorders, video recorders, electronic instruments and automatic office equipment. There are many misunderstandings in the use of BLDC motor to pay attention to, such as the motor is not bad, torque and speed and brush motor is the same, it has no brush, low interference, smooth operation and other advantages.


Ⅱ. The misunderstanding of using BLDC motor


1. The motor is not bad: wrong, BLDC motor will be bad. For example, coil short circuit, foreign body into the motor, and motor overload, overheating, resulting in magnet degaussing. Understand the rated current and rated power of the motor, and keep the motor in use under the rated parameter value. Overload, overheating, demagnetization and other conditions will occur if the motor exceeds the rated parameter value.


2. Torque and speed and brush motor is the same: wrong, or to take a term in the torque and speed. If one measure is higher, the other must be discounted. This is why it is necessary to prepare more than one BLDC motor. No matter what motor do not expect infinite speed, torque infinite. It has to be one or the other. For automation equipment, the highest speed should be achieved with sufficient torque. But BLDC motor of the same level, at the same speed, brushless torque is slightly higher; It's a little bit higher for the same torque. Anyway, speed times torque, the brushless product is higher than the brushless product. This is because it is more efficient than the brush motor.


3. No maintenance: wrong, need to clean the BLDC motor, replace the bearing, magnet magnetization, in order to maintain the best performance. Any damage to the motor will make the motor not work.


Ⅲ. The advantages of BLDC motor


1. Brushless, low interference: BLDC motor to remove the brush, the most direct change is that there is no electric spark generated when the brush motor is running, which greatly reduces the interference of electric spark on remote control radio equipment.


2. Low noise, smooth operation: BLDC motor without a brush, when the friction is greatly reduced, smooth operation, noise will be much lower, this advantage is a great support for the stability of the model operation.


3. Long life, low maintenance cost: less brush, BLDC motor wear is mainly on the bearing, from the mechanical point of view, BLDC motor is almost a maintenance free motor, when necessary, just do some dust maintenance.