Today, Senli Motor Xiaobian mainly to share with youBrushless DC motorThe difference between a cowl pole asynchronous motor:

The efficiency of brushless motors is usually85％to90％This is in large part because most of the energy entering the coil actually makes the rotor move. We can compare the brushless DC motor with another type of shield-pole asynchronous motor in the fan to understand the difference between the use of the two motors.

The electromagnetic force in the stator of an asynchronous motor induces magnetism in the rotor. They induce magnetism in the rotor and are used because, unlike the rotor in a brushless DC motor, the rotor in an asynchronous motor does not contain any magnets. The motors that power the cooling fans tend to be brushless motors or asynchronous motors. Here, we examine the major differences in the construction of the two motor types and explain the reasons for the significant difference in energy efficiency between the two types of motors.

Brushless motors are sometimes called electronic commutator motors. Commutation here refers to the action of switching an electrical connection from one motor winding to another. The motor winding in a DC motor is usually located in the stator or fixed part of the motor. The rotor then contains magnets with alternating poles. Dc motors with magnets in the rotor are sometimes referred to as external rotors. There are other possible configurations, but they are not as widely used as external rotors.)

A brushless DC motor uses an electronic controller to energize the stator windings sequentially, turning the stator windings into electromagnets and thus rotating the rotor. First, a set of coils (i.e. a coil and a distance located from it)180ºThe coil (at) will be energized to become an electromagnet. This causes the opposite poles of the rotor and the stator to attract each other, when the rotor is near the energized coil, the next coil is energized, the coil closest to the magnetic pole of the rotor is closed, and when the rotor is rotating near the next coil on the stator, the coil closest to the rotor pole will be closed. When the rotor is running, the above actions are repeated. Therefore, there is a combined effect of pulling and pushing on the rotor, so that the motor has a high efficiency. The combined effect is that most of the coils in the stator are almost always acting on the rotor. And high efficiency is one of the reasons you see fans made of electronically commutated DC motors.

The advantage of shaded pole motors is that they are cheap because of their very simple structure. But the problem is that they are inefficient, in large part due to the lossy link between the shadow coil and the main winding. The efficiency of a Shadowed pole motor is usually only15％to30％The power factor is also very low.

For only one small fan (shadow pole motor is usually40 WOr smaller) applications, low power factor and efficiency may be OK. However, consider an application like a data center, which contains racks and racks as well as racks and racks of servers, and each server has its own fan. It is not recommended to let hundreds or even thousands of fans all be used only30％The efficiency of operation, using brushless motor technology and its bring90％Efficiency can really benefit these applications.

"Senli Motor" brand belongs to Shengzhou Chaoli electric Appliance Factory. have3600Square standardized factory, with equipment CNC lathes/End facing machine/Grinding machine/Drilling machine/Automatic threading machine/Automatic winding machine/Comprehensive tester/Vacuum dip paint machine/Drying machine/Dynamic balancing machine/Punching machine, etc. Annual production capacity12Ten thousand units. Motor performance can be customized according to the needs of the equipment host, technical engineers one-to-one, from the motor power, performance parameters, insulation level, installation mode, size, etc., issue the overall customized solution of non-standard motor.