Difference between high-speed motors and ordinary motors

High-speed door motor usually refers to a motor with a speed of more than 10000 r/min. They have the advantages of high motor power density, effective material saving, high transmission efficiency, low noise, and fast dynamic response due to their high speed, much smaller volume than ordinary motors, connection with the prime mover, elimination of the traditional reduction mechanism, and small rotational inertia of high-speed motors.

Here is the content list:

• Main types and characteristics of high-speed door motors

• Difference between high-speed door motors and ordinary motors

Main types and characteristics of high-speed door motors

At present, the main types of high-speed door motors used are induction motors, permanent magnet motors, and switched reluctance motors. Each type of motor has a different topology. The high-speed induction motor rotor has a simple structure, low moment of inertia, and can operate for a long time under high-speed conditions. It is widely used in high-speed fields. Permanent magnet motors have the advantages of high efficiency, high power factor, and wide speed adjustment range, and are widely used in high-speed applications; Compared with the outer permanent magnet rotor motor, the inner rotor permanent magnet motor has the advantages of small rotor radius and strong reliability, and becomes the first choice of the permanent magnet high-speed motor. Switched reluctance motor has a simple structure, durability, low cost, and high-temperature resistance, and is widely used in high-speed fields.

Difference between high-speed door motors and ordinary motor

The design of high-speed door motors is quite different from that of ordinary motors. The special requirements of the high-speed motor on rotor strength, bearing adaptability, loss, and heat dissipation shall be considered in the design. The main problems in the design and development of high-speed door motors are as follows:

One is the bearing. The ball bearing may have oil leakage under high strength rotating speed, the load capacity is limited and the price is expensive.

Second, the design of the motor needs multidisciplinary knowledge to support it, so it needs to combine different kinds of external factors to carry out motor technology research.

Third, in terms of permanent magnets, the strength and temperature resistance of permanent magnets are relatively poor, which is extremely unfavorable for the development of high-speed door motors.

Fourth, the centrifugal force that the laminated rotor can bear is small, but the eddy current loss is large, which requires more in-depth exploration and research.

Fifthly, in terms of stator and rotor losses and related calculation methods, it needs to be improved. High-speed motors have different characteristics from conventional motors in rotor strength, rotor system dynamics, electromagnetic design, cooling system design, temperature rise calculation, and high-speed bearing development. Compared with the constant-speed motor, the rotor system of the high-speed motor is more likely to approach the critical speed. In order to avoid bending resonance, the rotor strength must be adjusted and improved according to the critical speed of the rotor system.

EVERBRIGHT, China Door and Terminal Equipment Company was founded in 2013. Everyone in the company is an expert in this field. Our company has an experienced team and all means to focus on production equipment. We can provide appropriate solutions for customers' needs.

If you want to know more information about high-speed door motors, welcome to consult us. Our website is :www.everbrightdoor.com.