Non-salient-pole permanent magnet synchronous motor direct characteristic control system and control method

Abstract

The invention relates to a non-salient-pole permanent magnet synchronous motor direct characteristic control system and a control method. The control system comprises a position loop control circuit, a rotating speed loop control circuit, a stator current detection module, a sliding mode variable structure observer, a prediction control module, a characteristic control module, a time-delay module, and an inversion module, the stator current detection module is connected with a permanent magnet synchronous motor, an input terminal of the sliding mode variable structure observer is connected with the stator current detection module, the position loop control module, and the time-delay module, an output terminal of the sliding mode variable structure observer is connected with an input terminal of the prediction control module, the input terminal of the prediction control module is connected with the position loop control circuit and the time-delay module, an output terminal of the prediction control module is connected with an input terminal of the characteristic control module, the input terminal of the characteristic control module is connected with the position loop control circuit and the rotating speed loop control circuit, an output terminal of the characteristic control module is connected with the unit time-delay module and an input terminal of the inversion module, and an output terminal of the inversion module is connected with the permanent magnet synchronous motor. Compared with the prior art, the system is advantaged by more compact structure, accurate control, fast current response speed and the like.

Description

technical field [0001] The invention relates to a control system and method of a hidden pole permanent magnet synchronous motor, in particular to a direct characteristic control system and a control method of a hidden pole permanent magnet synchronous motor. Background technique [0002] At present, in the fields of servo control systems and other fields, most of the control strategies used are still based on vector control, and the core of vector control is the double-loop structure, that is, the outer speed loop and the inner current loop, which inevitably requires the use of PI regulators. However, the PI regulator also has some problems of its own, such as insufficient bandwidth, easy saturation and so on. Aiming at these problems, some restraining methods and means have been proposed, but the system and structure are undoubtedly more complicated in terms of the whole control method. Therefore, in order to solve the motor control strategy problem proposed above, there a...

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Problems solved by technology

However, the inverter also needs another sampling period to convert the duty cycle signal to the voltage on the motor side, so that the actual delay in the digital control is two cycles

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