Sensorless switch magnetic resistance motor-driven system

Abstract

A sensorless switch magnetic resistance motor-driven system belongs to the motor control field, and comprises a switch magnetic resistance motor, an asymmetric converter, a bus capacitor, a DC power supply, a driving circuit, a current regulator, a backstepping controller, a non-linear state observer, a current hall sensor, a current signal conditioning circuit, a voltage hall sensor, and a voltage signal conditioning circuit; the sensorless structure can increase the system stability; the non-linear state observer can monitor the stator-phase voltage and phase current so as to calculate therotor position, thus accurately determining the rotor position even the motor is under a high speed rotating state, reducing the system cost, and improving the driving precision.

Description

technical field [0001] The invention belongs to the field of motor control, in particular to a drive system of a position sensorless switched reluctance motor. Background technique [0002] Switched reluctance motor is the latest generation of stepless speed regulation system developed after frequency conversion speed regulation system and brushless DC motor speed regulation system. It integrates modern microelectronic technology, digital technology, power electronics technology, infrared photoelectric technology and modern electromagnetic technology. It is a high-tech integrated optical, mechanical and electrical integration of theory, design and production technology. It has simple structure, low cost, many controllable parameters, small starting current, large starting torque, high system efficiency and good braking. Excellent features such as energy recovery performance are widely used in various electronic and mechanical fields. In recent years, they have also been wide...

AI Technical Summary

Problems solved by technology

[0002] Switched reluctance motor is the latest generation of stepless speed regulation system developed after frequency conversion speed regulation system and brushless DC motor speed regulation system. It integrates modern microelectronic technology, digital technology, power electronics technology, infrared photoelectric technology and modern electromagnetic technology. It is a high-tech integrated optical, mechanical and electrical integration of theory, design and production technology. It has simple structure, low cost, many controllable parameters, small starting current, large starting torque, high system efficiency and good braking. Excellent features such as energy recovery performance are widely used in various electronic and mechanical fields. In recent years, they have also been widely used in the field of electric vehicles. When the number of motor phases increases, the number of sensors used in position detection devices will increase accordingly. , the existence of the rotor position detection device not only reduces the reliability of the entire drive system, but also increases the cost of the switched reluctance motor drive system, making it difficult to achieve high-speed control of the motor, which limits the application range of the switched reluctance motor

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