A passive control method for interpolated permanent magnet synchronous motor without speed sensor

Abstract

The invention relates to a passive control method for an interpolated permanent magnet synchronous motor without a speed sensor. The desired motor speed is set, and a non-singular high-order terminal sliding mode observer is established to estimate the motor speed and the angular displacement of the motor rotor. Value, obtain the difference between the expected motor speed and the estimated value of the motor speed, perform PI adjustment, obtain the expected electromagnetic torque, and obtain the expected d-axis current component and the expected q-axis current component through optimal torque control, Establish the passive controller of the interpolated permanent magnet synchronous motor based on the port-controlled Hamiltonian system model, obtain the d-axis voltage component and the q-axis voltage component, and perform park-1 transformation on the d-axis voltage component and the q-axis voltage component , the α-axis voltage component and the reference β-axis voltage component are obtained, and the α-axis voltage component and the reference β-axis voltage component are subjected to voltage space vector pulse width modulation to obtain six driving pulse signals. This control method can make the whole system have good steady-state precision and dynamic performance.

Description

Technical field [0001] The invention belongs to the technical field of motor control, and specifically relates to a passive control method of an interpolated permanent magnet synchronous motor without a speed sensor. Background technique [0002] Interpolated permanent magnet synchronous motors are widely used in industrial and mining enterprises due to their advantages of high power density, high operating efficiency and reliable structure. However, it is affected by uncertainties such as changes in motor parameters, load disturbances, unmodeled objects, and the current use of mechanical speed sensors increases costs and reduces system reliability. It is necessary to achieve high-performance adjustment of interpolated permanent magnet synchronous motors. Speed ​​requires advanced control method design based on accurate acquisition of rotor position and speed information. [0003] In recent years, for surface-mounted permanent magnet synchronous motors, the back EMF is often estim...

AI Technical Summary

Problems solved by technology

However, this method is not suitable for direct application to interpolated permanent magnet synchronous motors, because the rotor position information is not only included in the back electromotive force but also related to its alternating and direct axis inductance.

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