What Is The Difference Between A High-efficiency Motor And An Ordinary Motor?

Ordinary motor: The motor is a device that converts electrical energy into mechanical energy. 70%-95% of the electrical energy absorbed by the motor is converted into mechanical energy, which is often referred to as the efficiency value of the motor. It is an important technical indicator of the motor. The remaining 30%- The 5% part is consumed by the motor itself due to heat generation, mechanical loss, etc., so this part of the electric energy is wasted.

High-efficiency motor: A motor with a high power utilization rate is called a high-efficiency motor, or "high-efficiency motor" for short.

For ordinary motors, it is not easy to increase the efficiency by 1%, and the material will increase a lot, and when the motor efficiency reaches a certain value, no matter how much material is added, it cannot be improved. Most of the high-efficiency motors on the market are the replacement products of three-phase asynchronous motors, which means that the basic working principle has not changed.

The high-efficiency motor mainly improves the efficiency of the motor in the following ways.

1. Increase the material: increase the outer diameter of the iron core, increase the length of the iron core, increase the size of the stator slot, and increase the weight of the copper wire to achieve the purpose of improving efficiency, such as Y2-8024 The outer diameter of the motor is increased from the current Φ120 to Φ130, some foreign countries increase Φ145, and at the same time increase the length from 70 to 90. The amount of iron used for each motor increases by 3Kg. The copper wire increases by 0.9Kg.

2. Silicon steel sheets with good magnetic conductivity are used. In the past, hot-rolled sheets with large iron loss were used, and high-quality cold-rolled sheets with low losses are now used, such as DW470. Even lower than the DW270.

3. Improve machining accuracy and reduce mechanical losses. Replace small fans to reduce fan losses. High-efficiency bearings are used.

4. Optimize the electrical performance parameters of the motor, and optimize the parameters by changing the slot shape.

5. Adopt cast copper rotor (complex process and high cost).

Therefore, to make a real high-efficiency motor, the design, raw materials, and processing costs are much higher, so that electricity can be converted into mechanical energy to the greatest extent.