Passivity-based control method for speed-senseless interpolating permanent magnet synchronous motor

Abstract

The invention relates to a passivity-based control method for a speed-senseless interpolating permanent magnet synchronous motor. The passivity-based control method comprises the following steps of: setting a desired motor rotational speed, establishing a non-singular high-order terminal sliding-mode observer to estimate a motor rotational speed estimated value and a motor rotor angular displacement estimated value, evaluating the difference between the desired motor rotational speed and the motor rotational speed estimated value, carrying out PI adjustment, evaluating a desired electromagnetic torque, obtaining a desired d-axis current component and a desired q-axis current component through optimal torque control, establishing a passive controller for the interpolating permanent magnet synchronous motor, based on a port controlled Hamiltonian system model, evaluating a d-axis voltage component and a q-axis voltage component, carrying out pack-1 transform on the d-axis voltage component and the q-axis voltage component to obtain an alpha-axis voltage component and a reference beta-axis voltage component, and carrying out voltage space vector pulse-width modulation on the alpha-axis voltage component and the reference beta-axis voltage component to obtain six paths of drive pulse signals. The control method enables the whole system to be provided with good steady accuracy and dynamic performance.

Description

technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a passive control method for an interpolated permanent magnet synchronous motor without a speed sensor. Background technique [0002] The interpolated permanent magnet synchronous motor has been widely used in industrial and mining enterprises due to its advantages of high power density, high operating efficiency and reliable structure. However, it is affected by uncertainties such as motor parameter changes, load disturbances, and unmodeled objects, and the mechanical speed sensors currently used increase costs and reduce system reliability. To achieve high-performance regulation of interpolated permanent magnet synchronous motors Therefore, it is necessary to design advanced control methods on the basis of accurately obtaining rotor position and speed information. [0003] In recent years, for surface-mounted permanent magnet synchronous motors, the counter e...

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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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