Electromotor adopting the magnetic floating bearing

Abstract

The invention relates to a electric motor which used the magnetic bearing, it includes the electricity moving axis, the rotor, the stator, the bearing, among, the electricity engine shaft two terminal respectively are loaded with a magnetic bearing, the electric engine axis on the two outboard of magnetic bearing separately setup a rolling bearing, the high precise sensor installed on the magnetic bearing stator. An airway in the center bit of the electric engine axis is used for taking away the heat which the magnetic coil and rolling eddy current loss produce. The invention magnetic bearing electric motor, can causes the rotary speed of the high power motor reaches to more than 5000r / min, and the magnetic bearing has no attrition, no need to refuel turely achieve exempt maintenance of the electrical machinery.

Description

technical field [0001] The invention relates to high-speed motors, especially motors using magnetic bearings. Background technique [0002] Traditional motors use rolling or sliding bearings, which limit the speed of the motor due to friction in the rolling or sliding bearings. In addition, due to the need for lubricants for rolling or sliding bearings, it is easy to pollute the system. To increase the motor speed, the above two bearings are difficult to achieve. A novel magnetic bearing floats the motor rotor only by electromagnetic force, and adjusts the magnetic field force through the closed-loop control of sensors distributed on various parts of the bearing stator to keep the air gap between the stator and rotor uniform. The magnetic bearing only exists Very small air friction, friction heat is very small, so that the motor can reach a very high speed, the motor speed depends entirely on the structural strength of the motor rotor itself, but there are two problems in ...

AI Technical Summary

Problems solved by technology

[0002] Traditional motors use rolling or sliding bearings, which limit the speed of the motor due to friction in rolling or sliding bearings

In addition, due to the need for lubricants in rolling or sliding bearings, it is easy to pollute the system

To increase the speed of the motor, the above two types of bearings are difficult to achieve

A novel magnetic bearing floats the motor rotor only by electromagnetic force, and adjusts the magnetic field force through the closed-loop control of sensors distributed on various parts of the bearing stator to keep the air gap between the stator and rotor uniform. The magnetic bearing only exists Very small air friction and small frictional heat enable the motor to reach a very high speed. The speed of the motor depends entirely on the structural strength of the motor rotor itself. However, there are two problems in the use of magnetic bearings in the motor: (1) Because the bearing itself has electromagnetic Coil and rotor eddy current losses generate heat

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