Permanent magnet synchronous motor speed adjusting system based on internal model control and design method thereof

Abstract

The invention discloses a permanent magnet synchronous motor speed adjusting system based on internal model control and a design method thereof. The method includes the steps of designing a standard speed internal model controller, designing a dual-port speed internal model controller, designing a fuzzy self-adaptive speed internal model controller, and determining a final q-axis current referencevalue according to the designed fuzzy self-adaptive speed internal model controller to realize the dual-closed-loop vector control of a motor. The influences caused by motor model mismatch and external interference on motor operation are solved, the motor control effects of enhancing the control system speed tracking performance and anti-interference performance are realized, and speed tracking and load disturbing can be well realized. The influences caused by model mismatch and external interference on motor operation can be overcome, and therefore the robustness and stability of the systemare improved.

Description

technical field [0001] The invention relates to a design method of an AC motor control system, in particular to a permanent magnet synchronous motor speed regulation system based on internal model control and a design method thereof. Background technique [0002] The permanent magnet synchronous motor has high application value because of its simple structure, high precision and small volume. As a relatively mature control method, vector control can better realize current decoupling, so it has been widely used in various fields of motor control. [0003] The general vector control method includes the speed loop and the current loop, which are realized by three PI controllers. However, in the actual application process, due to the existence of accurate modeling and external interference, the PI controller cannot achieve fast speed. Tracking, so in some occasions that require high precision, higher requirements are put forward for the control system. [0004] In actual indus...

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Problems solved by technology

However, the parameter design of ordinary internal model control filters needs to consider the reliability and followability of the controller. It is difficult to take into account both performances at the same time with only one adjustable filter parameter. Therefore, it is necessary to Make certain improvements; in addition, it is also necessary to consider the situation of large motor load disturbance, large inertia change and saturation control input, etc., it is urgent to study the speed regulation method of permanent magnet synchronous motor under such various conditions

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