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A self-starting method of permanent magnet synchronous motor based on power angle closed-loop control strategy

A permanent magnet synchronous motor, closed-loop control technology, applied in the direction of controlling generators, controlling electromechanical brakes, controlling electromechanical transmissions, etc., can solve problems such as the ability to prevent motors from being out of step and preventive control

Inactive Publication Date: 2019-01-11
XIANGTAN UNIV
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Problems solved by technology

[0005] In order to overcome the technical defect that the existing power angle control method cannot make the motor maintain a strong out-of-step preventive control ability under any working conditions, the present invention provides a permanent magnet synchronous motor self-starting method based on a power angle closed-loop control strategy

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  • A self-starting method of permanent magnet synchronous motor based on power angle closed-loop control strategy
  • A self-starting method of permanent magnet synchronous motor based on power angle closed-loop control strategy
  • A self-starting method of permanent magnet synchronous motor based on power angle closed-loop control strategy

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Embodiment Construction

[0067] A permanent magnet synchronous motor self-starting method based on the power angle closed-loop control strategy, the system structure diagram is as follows figure 1 Shown, it is characterized in that comprising the following steps:

[0068] Step 1: Establish a power angle characteristic formula describing the relationship between the electromagnetic torque and the power angle;

[0069] Step 2: Considering the fact that the electromagnetic torque remains constant during the motor starting process, the Poincaré mapping algorithm and the fractional-order sliding mode observer are used to approximate the motor speed; the Poincaré mapping algorithm is used to calculate the motor speed determined by the characteristics of the motor itself. The determined speed change trajectory; the fractional sliding mode observer is used to calculate the speed deviation value determined by various uncertain factors in the system;

[0070] Step 3: Establish a dual-fuzzy inference controller...

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Abstract

The invention provides a self-starting method of a permanent magnet synchronous motor based on a power angle closed-loop control strategy. Based on the fact that the electromagnetic torque is basically constant in the starting process of the motor, in accordance with that power angle characteristic curve, By combining Poincare mapping with fractional sliding mode observer. The real-time acquisition of the error between the power angle feedback value, the set value and the threshold value is realized. Based on this, a double fuzzy controller is introduced to adjust the deviation between the stator voltage and the power angle in real-time. Finally, a robust control strategy which satisfies the steady start of the motor and does not lose step is obtained.

Description

technical field [0001] The invention relates to a motion controller design method, in particular to a permanent magnet synchronous motor self-starting design method based on a power angle closed-loop control strategy, and belongs to the field of position sensorless control technology and motor dynamics. Background technique [0002] The research on the out-of-step problem in the motor starting process plays an important role in the stable operation of the position sensorless system. On the one hand, since the real value of the electrical quantity in the system is submerged by noise when the motor starts, there is a prediction dead zone in the rotor position prediction algorithm at this stage, which makes the system that can only work in the open-loop mode more prone to out-of-step; on the other hand, the signal Injection methods can provide accurate position information within the aforementioned predicted dead zone, but the reliance of such methods on external signal excitat...

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Application Information

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IPC IPC(8): H02P6/20H02P6/34H02P21/13
CPCH02P6/20H02P21/001H02P21/13H02P6/34
Inventor 陈思溢黄辉先
Owner XIANGTAN UNIV
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