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Permanent magnet synchronous motor quasi dead-beat model prediction flux linkage control method

A permanent magnet synchronous motor and model prediction technology, which is applied in the direction of motor generator control, electronic commutation motor control, control system, etc., can solve the problems of aggravated system delay and inaccurate predictive control

Active Publication Date: 2016-07-13
SOUTHEAST UNIV
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Problems solved by technology

And more voltage vector objects will aggravate the system delay during the optimization process, resulting in inaccurate predictive control, especially in the predictive control of multi-phase motors

Method used

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  • Permanent magnet synchronous motor quasi dead-beat model prediction flux linkage control method
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  • Permanent magnet synchronous motor quasi dead-beat model prediction flux linkage control method

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] Such as figure 1 Shown is a permanent magnet synchronous motor quasi deadbeat model predictive flux linkage control system such as figure 1 As shown, it includes PI controller 1, stator flux vector reference calculation module 2, effective voltage vector selection module 3, stator flux vector prediction module 4, optimization module 5, inverter 6, permanent magnet synchronous motor 7 and photoelectric encoder device 8.

[0040] In order to realize the quasi deadbeat model-predictive flux linkage control of the permanent magnet synchronous motor, it is necessary to calculate the stator flux vector reference ψ s * (k+1) and stator flux vector prediction value ψ s (k+1), the effective voltage vector is selected according to the quasi deadbeat control principle. Figure 4 is the relationship between the vectors at time k, Figure 5 is the target voltage vector...

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Abstract

The invention discloses a permanent magnet synchronous motor (PMSM) quasi dead-beat model prediction flux linkage control method comprising steps of: computing a stator flux linkage vector reference value at a next moment within a limited control framework, and obtaining a target voltage vector according to the reference value and a dead-model control idea; determining the sector of the target voltage vector in virtue of the position angle of the target voltage vector and selecting three valid voltage vectors by using the sector; predicting the stator flux linkage vector at the next moment according to the three valid voltage vectors; and obtaining the optimum on-off state of an inverter by optimizing a value function, wherein the inverter outputs voltage to a PMSM according to the optimum on-off state. The value function does not include weight calculation. When the value function is optimized, only the three valid voltage vectors are optimized so that algorithm operation time is shortened.

Description

technical field [0001] The invention relates to a quasi deadbeat model-predicted flux linkage control method of a permanent magnet synchronous motor, which belongs to the motor drive and control technology. Background technique [0002] Finite control set model predictive control can solve optimization problems online according to the constraints and discrete characteristics of the controlled object. Its structure is simple and easy to implement, and it has been widely used in the fields of power electronics and motor drives in recent years. In the field of motor control, according to the different control variables, the finite control set model predictive control includes model predictive current control, model predictive torque control and model predictive flux linkage control. The model predictive current control takes the stator armature current as the control object, and its steady-state torque ripple is relatively large. The value function of model predictive torque c...

Claims

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Application Information

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IPC IPC(8): H02P21/14H02P21/12
CPCH02P21/12H02P21/141
Inventor 花为黄文涛程明
Owner SOUTHEAST UNIV
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