Rotary speed adaptive robust control system and method for ultra-high-speed permanent magnet synchronous motor

Abstract

The invention relates to a rotary speed adaptive robust control system and method for an ultra-high-speed permanent magnet synchronous motor. The method comprises the steps of determining a motor rotary speed estimated value and a motor rotary speed error value by adopting a sensorless rotary speed estimation algorithm; determining a corresponding control amount by adopting an adaptive robust rotary speed control algorithm; determining a stator flux, a torque feedback value, flux error and torque error through motor three-phase current and three-phase voltage; performing voltage vector selection to obtain a basic voltage control signal; determining rotor position information through the sensorless rotary speed estimation algorithm; obtaining a three-phase compensation voltage by adopting a dead region compensation algorithm; combining the basic voltage control signal output by a voltage vector selection module with the three-phase compensation voltage, and performing PWM control on the motor; and repeatedly carrying out the steps until the motor rotary speed achieves the index. According to the rotary speed adaptive robust control method, the rotary speed estimation algorithm, the adaptive robust speed control algorithm, and the dead region compensation algorithm are adopted, so that the rapid, stable and reliable rotary speed control of the ultra-high-speed permanent magnet synchronous motor is effectively realized.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a speed adaptive robust control system and method for an ultra-high-speed permanent magnet synchronous motor. Background technique [0002] The development of modern science and technology and industrial technology has made ultra-high-speed machining and ultra-precision machining the two directions of future manufacturing development. Among them, ultra-high-speed machining not only represents extremely high productivity, but also can significantly improve the machining accuracy and surface quality of parts. Ordinary motors cannot meet these processing requirements, and people's demand for ultra-high-speed motors is increasing day by day. Ultra-high-speed motors are widely used in industrial manufacturing, aerospace, energy, shipbuilding, medical and defense industries, and the application prospects are very broad. Ultra-high-speed motors mainly refer to motors with a rated speed abo...

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Problems solved by technology

V / f control has the problem of instability, and it is very dependent on the selection of speed reference curve and V / f curve parameters. Since V / f belongs to open-loop control, it cannot get good dynamic performance, and the disturbance of system load torque It is easy to cause out of step or even start failure

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