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Research and Realization of Leavition Control for Bearingless Induction Motor

Author: LinYingJie
Tutor: DengZhiQuan
School: Nanjing University of Aeronautics and Astronautics
Course: Motor and electrical
Keywords: Maglev Bearingless induction motor Field Oriented Control Levitation Subsystem Independent control The air - gap magnetic field measurement Digital control system
CLC: TM343
Type: Master's thesis
Year: 2005
Downloads: 184
Quote: 4
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Abstract


Bearingless motor is a new motor torque control and suspension control , with traditional magnetic levitation motor suspension mechanism of the type , which utilizes a magnetic bearing structure and the AC motor stator structure similar to the control winding of the armature winding and suspended jointly winding in the stator of the motor , using the suspension winding generates a magnetic field to change the distribution of the air gap magnetic field in the motor , in order to achieve the suspension of the shaft . Fundamentally changed the traditional bearings or magnetic bearings supporting type bearingless motor with no wear, no lubrication , sealing, and high power density, shaft stiffness and long life and a series of excellent quality , energy, transportation , aviation aerospace , industrial machinery and robots and other high-tech fields have broad application prospects . This paper describes the basic working principles of bearingless induction motor , bearingless induction motor mathematical model to analyze the bearing induction motor with field-oriented control characteristics . The suspension control coupled , based on the the SPWM principles of magnetic chain tracking inverter to control the suspension windings , to solve the suspension winding rotor induction current suspension control . The motor air gap magnetic field detection or identification , the the suspension subsystem independently controlled . Harmonic flux density in the suspension control system , and use the appropriate method in the detection coil measuring the air gap magnetic field algorithm to reduce the impact of the suspension control , suspension control accuracy . In addition, the relationship between the the rotor eccentric measured flux density and the actual flux density , and to analyze the possibility of detecting the rotor displacement detection coil . Finally, based the TMS320F2812 digital control hardware system and software system is designed and implemented .

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CLC: > Industrial Technology > Electrotechnical > Motor > AC motor > Induction motor
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