Stator embedded electromanetic suspension rotor micro motor

Abstract

The utility model relates to a stator-embedded electromagnetic levitation rotor micro-motor, which belongs to the technical field of micro-electro-mechanical systems. In the present invention, both the upper stator and the lower stator are arranged on the intermediate base, and form a fixed connection with the intermediate base, the box-shaped micro-rotor is in the shape of a hollow circular box, and the box-shaped micro-rotor is under the electromagnetic force of the upper stator and the lower stator It is stably suspended on the outer edge of the intermediate base. There are eight rotating coils distributed on the intermediate base. They are divided into two groups of four-phase coils. When high-frequency alternating current passes through the rotating coils, the current phase difference of adjacent coils is 90 degrees, so that , A rotating magnetic field is formed in the space where the box-shaped micro-rotor is located, and the box-shaped micro-rotor generates a rotating torque under the action of the rotating magnetic field to make it rotate at a high speed. The present invention adopts a box-shaped micro-rotor and a built-in stator structure, which can increase the suspension stiffness and lateral stability stiffness of the suspended micro-rotor, and at the same time, the intermediate base can limit the position of the micro-rotor when the box-shaped micro-rotor is not working .

Description

technical field [0001] The invention relates to a micro-motor in the field of micro-electromechanical technology, in particular to a stator-embedded electromagnetic levitation rotor micro-motor. Background technique [0002] The use of suspension technology can avoid the friction and wear caused by contact, so as to obtain high moving speed or rotation speed, and at the same time avoid the pollution of materials due to contact, so suspension technology is widely used in production or life, such as Maglev trains, electrostatic levitation bearings, electromagnetic levitation smelting technology, electrostatic gyroscopes, etc. Electromagnetic levitation is completely a passive levitation technology, that is, it does not need an external feedback control circuit to achieve autonomous levitation. At the same time, electromagnetic levitation has no strict requirements on the gap between electrodes. Compared with electrostatic levitation, the structure of electromagnetic levitation...

AI Technical Summary

Problems solved by technology

The planar coil series electromagnetic levitation micro-rotating gyroscope has the following disadvantages: 1. Two high-frequency currents of different frequencies need to pass through the series coil, which increases the complexity of the control circuit; 2. Stable levitation drive electromagnetic field and rotation drive The electromagnetic fields overlap in space, thus increasing the mutual interference between them; 3. The rotating electromagnetic field is distributed in the entire radius and length direction, but the rotating electromagnetic field at a larger radius plays the most role; 4. Because it can only be driven by unilateral suspension, the suspension stability of the whole device is not good, and the stable suspension anti-interference performance is poor; 5. With the increase of the current in the stable suspension coil, the suspension height of the micro-rotor increases, so the lateral stiffness of the suspension poor adjustability

This speed is far from meeting the requirements of high-precision micro-gyro

Images