High efficiency motor

What is a high-efficiency motor?

     It is an induction motor that has different characteristics from ordinary electric motors. It is designed and improved motor components to reduce losses by selecting high-quality materials for production with low losses. As a result, the efficiency of the motor is higher and energy losses can be reduced.

As a result, high-efficiency motors can save more energy than conventional motors with the same operating conditions.

 

Characteristics of high efficiency motors

1. Use special quality steel core, high quality silicon steel sheet, power loss is about 3.3 watts per 1 kg of steel weight (general electric motors use low carbon pressed steel sheet, power loss is about 6.6 watts per 1 kg of steel weight)

2. The use of thinner steel sheets for the stator and rotor than ordinary motor steel sheets results in less eddy current due to higher resistance of the steel sheets, thus reducing the loss in the iron core.

3. Using copper conductors that are about 35-40% larger than in conventional motors, reduces copper losses and heat from stator and rotor windings. In addition, the closed ring conductors for short-circuiting the rotor ends are also larger.

4. Increasing the length of the iron core (increasing the iron core area) to reduce the magnetic field density, resulting in less power loss in the iron core, thus increasing the power factor and reducing the stator current (saving electricity costs).

5. The air gap between the stator and rotor is reduced more than in a conventional motor (reducing the magnetic flux resistance from the stator to the rotor), resulting in higher magnetic flux lines, reduced magnetic flux leakage, resulting in less power delivered to the motor with the same torque and reduced other minor losses.

6. Use a cooling fan that is small and has less friction to the wind.

7. Use ball bearings that have less friction than conventional motors.