Model prediction control method, device and equipment for permanent magnet synchronous motor

Abstract

The invention discloses a model prediction control method for a permanent magnet synchronous motor. The model prediction control method comprises the steps of selecting a first effective voltage vector to act on the permanent magnet synchronous motor, and then selecting a second effective voltage vector to substitute a zero sequence voltage vector in the prior art to act on the permanent magnet synchronous motor at the time beyond the acting time of the first effective voltage vector on the permanent magnet synchronous motor in a control cycle. The voltage vectors acting on the permanent magnet synchronous motor in the control cycle are effective voltage vectors, and a current value output by the permanent magnet synchronous motor is more approximate to an expected current value, so that an error between the current value output by the permanent magnet synchronous motor and the expected current value is reduced, and an influence on the steady state performance of a servo system of thepermanent magnet synchronous motor is avoided. In addition, the embodiment of the invention further discloses a model prediction control device and equipment for the permanent magnet synchronous motor, and a computer readable storage medium.

Description

technical field [0001] The present invention relates to the technical field of variable frequency power supplies, in particular to a model predictive control method, device, equipment and computer-readable storage medium for permanent magnet synchronous motors. Background technique [0002] Permanent magnet synchronous machine (PMSM) has the advantages of large torque, high power density, high efficiency, and fast dynamic response, so it is widely used in servo systems, robot drives and other fields. [0003] The control methods of permanent magnet synchronous motor mainly include PI regulator, sliding mode variable structure control, hysteresis control and model predictive control (model predictive control, MPC), etc. Compared with PI regulator, sliding mode variable structure control and hysteresis loop Control, model predictive control is simple, has good dynamic performance, and has many advantages of nonlinearity and limitation. It is a promising control technology in p...

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Problems solved by technology

However, with this method, within one control cycle, when the zero-sequence voltage vector acts on the permanent magnet synchronous motor, the error between the output current value of the permanent magnet synchronous motor and the expected current value is large, and the steady state of the permanent magnet synchronous motor servo system low performance

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