Integrated magnetic bearing control system and control method for high-speed motor

Abstract

The invention relates to an integrated magnetic bearing control system and control method for a high-speed motor. The system comprises an upper computer and five control units; each control unit comprises a DSP controller, a signal isolation circuit, a power circuit (three-phase full bridge IPM), a signal conditioning unit and a sensor; the upper computer displays the displacement of a rotor in real time and can input given signals to the DSP controllers, when the rotor deviates from an equilibrium position, the displacement of the rotor deviating from the equilibrium position is detected through the sensors and converted into voltage signals, the voltage signals are fed back to the DSP controllers after passing by the signal conditioning units, and the DSP controllers output PWM control signals after algorithm operation and control power switch pipes in the power circuits to work to adjust the current value of a coil of an electromagnetic bearing to make the rotor stably suspended. Through the arrangement of each DSP controller and the corresponding three-phase full bridge IPM, not only the integration degree of the whole control system is high, but also the anti-interference capability of the magnetic bearing can be improved, and the service life of the bearing is prolonged.

Description

technical field [0001] The invention belongs to an electromagnetic force support device, in particular to an integrated control system and control method of a magnetic suspension bearing for a high-speed motor. Background technique [0002] Magnetic suspension bearing is a new type of bearing with extremely high performance that uses electromagnetic force to achieve no mechanical contact between the rotor and stator. Compared with traditional bearings, magnetic suspension bearing has no mechanical friction, no lubrication, low working environment requirements and higher efficiency. features. [0003] Conventional electromagnetic bearing controllers usually use two DSP or DSP+FPGA control methods to output 10 different PWM control signals for control. At the same time, the drive circuit, isolation circuit and power main circuit in the power circuit usually use independent components Composition, and the bipolar H-type main circuit is built with two traditional power switch t...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of low integration of conventional electromagnetic bearing controllers and inconvenient debugging and maintenance, an integrated control system and control method for magnetic suspension bearings for high-speed motors are designed.

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