A current type double pwm high performance magnetic levitation high speed motor control system

Abstract

The invention relates to a current-type dual PWM (PWM full name: pulse width modulation) high-performance magnetic levitation high-speed motor control system, which mainly includes an AC filter, an IGCT module, a DC inductor, an IGBT module, a high-performance signal conditioning module, a control unit, and a SVPWM Generate module, drive protection module and operation interface. The three-phase industrial power is rectified into a controllable high-quality direct current through the current-type PWM structure with adjustable power factor. After passing through the DC inductor, it enters the IGBT drive module of the high-performance magnetic levitation high-speed motor to control the motor. The control unit module needs The control signal is obtained through the high-performance conditioning module, and then the output control signal enters the SVPWM generation module; the entire system is controlled through the operation interface, and the control object is a high-performance magnetic levitation high-speed motor.

Description

Technical field[0001]The present invention relates to a current type dual PWM high-performance magnetic suspension high-speed motor control system, which can be used for high-performance magnetic suspension permanent magnet synchronous motors of high-performance and medium-sized power and improve efficiency, cost savings.Background technique[0002]With the increasing maturity of maglev, its application is increasing, such as maglevs in the aerospace field, high energy density motor in industrial production, magnetic suspension air compressor, molecular pump in the field of cleaning energy Wait. However, most of the optimization effects of most controllers for maglev train are not ideally, and the overall efficiency is not high. For more precise or long-term running devices, a good controller has important significance for controlling control accuracy. Nowadays, the rectified part is mostly the diode is not controlled and rectified or the canonically rectification, although it is more...

AI Technical Summary

Problems solved by technology

Most of the rectifiers in today's controllers are diode uncontrolled rectifiers or thyristor half-controlled rectifiers. Although they are relatively stable, the power factor is relatively low. Working in a long-term operating environment is a waste of electric energy; when When the control object is a high-speed or ultra-high-speed motor, when the speed is reduced from the rated high-speed state, the motor becomes a generator and converts kinetic energy into electrical energy. It is also a waste of energy

The patent number is 200810041951.8, named: dual PWM inverter with bidirectional energy flow, invented a device that can realize bidirectional energy flow, and can effectively use new energy, but this device is equivalent to a device that can directly give Power generation equipment that transmits power to the grid cannot be directly used as a motor controller

Moreover, the current high-performance magnetic levitation high-speed motor has a large starting current, and there are few control systems for low-current starting.

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