Bearingless synchronous reluctance motor decoupling control system and construction method thereof

Abstract

The invention discloses a bearingless synchronous reluctance motor decoupling control system and a construction method thereof, which are used for suspension and speed control. When the system is used, an extended SVPWM (space vector pulse width modulation) inverter is firstly constructed to supply power for a motor torque winding and a suspension winding; then a magnetic field oriented decoupling model is constructed to realize the decoupling control of the motor before the magnetic field oriented decoupling model is concatenated to the extended SVPWM inverter; and finally an extended closed loop regulator is designed to realize high-performance closed-loop control on the system. According to the system provided by the invention, the extended closed loop regulator and the magnetic field oriented decoupling model can be realized by using a digital signal processor (DSP); besides, the system also comprises a displacement and current sensor and a photoelectric decoder which are used for acquiring current, displacement and a rotor location angular signal required by analysis and control of the DSP. The system and the method provided by the invention are used for the decoupling control of the bearingless synchronous reluctance motor with simple algorithm and excellent performance.

Description

technical field [0001] The invention relates to a bearingless synchronous reluctance motor decoupling suspension operation control technology, which belongs to the technical field of electric power transmission equipment, in particular to a bearingless synchronous reluctance motor decoupling control system and a construction method thereof. Background technique [0002] Bearingless synchronous reluctance motor is a new type of AC motor with both levitation and rotation functions realized by power electronics technology and microprocessor control technology. Suspended levitation windings and torque windings for generating electromagnetic torque. The new motor has outstanding performance: ultra-high speed, no wear, no lubrication, etc. Compared with other types of bearingless motors (mainly induction type, permanent magnet type and switched reluctance type), the bearingless synchronous reluctance motor has control Simple, solid and reliable rotor, suitable for places with har...

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Problems solved by technology

[0004] After searching existing documents and patents, it was found that Michioka C et al. proposed "A Decoupling control method of reluctance-type bearingless motors considering magnetic saturation" (IEEE Trans.on Industry Applications, 1996, 32(5): 1204-1210 ), Zhang Hannian and others proposed "Decoupling Control of Bearingless Synchronous Reluctance Motor Based on Feedforward Compensator" (Journal of Southeast University, Natural Science Edition, 2005, Vol.35 Sup(II): 193-197) and "Bearingless Synchronous reluctance motor decoupling integrated control strategy" (Electric Transmission, 2009, Vol.39(9): 56-59), the above decoupling strategy adopts feedforward compensation and feedback decoupling methods, but there is no flux linkage to the motor Orientation, the dynamic performance is poor; in addition, Zhang Hannian and others applied for the national invention patent (applica

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