Analysis and Study of a Bearingless AC Motor Type Divided Winding, Based on a Conventional Squirrel Cage Induction Motor

Compensation and Control of Bearingless Induction Motor’s Unbalanced Exciting Force Based on LMS Filter

“…Motor with magnetic bearings has been widely used in high-speed drive kingdoms [3][4][5], but it has a series of disadvantages, such as: higher magnetic suspensions cost, difficulty to over speed, [6][7][8]. Based on the comparability of stator structure between magnetic bearing and conventional AC motor, the bearingless motor is proposed [9][10][11][12]. Bearingless motor is a new type of electric machine applicable for high-speed operation.…”

Research on Dynamic Decoupling Control Method of Three-phase Bearingless Induction Motor

“…Bearingless motor is a newly type of electric machinery, which not only has the function of conventional motor, but also has the self-suspension function. Compared with the motor with magnetic bearings, the bearingless motor has a series of advantages, such as shorter rotor shaft, higher critical speed, being applicable to super-high speed and long time running [1][2][3][4][5][6]. Bearingless control technology can be used to all kinds of AC motors [1][2][3].…”

“…Bearingless induction motor not only has the advantages of other bearingless motors, but also has the compact and robust structure, then owns broad application prospects [1,[4][5][6][7][8]. But, there exist complex electromagnetic coupling relations within bearingless induction motor.…”

A Practical Scheme for Induction Motor Modelling and Speed Control

“…Field oriented control (FOC), also called vector control, is the most widely used alternating current (AC) machine control method in high performance industrial applications [6]. FOC of an induction motor provides the decoupling between the torque and flux in the similar way as in a direct current (DC) machine.…”