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Constraint condition-containing motor control method and constraint condition-containing motor control system

A constraint condition and motor control technology, applied in the field of motor control methods and systems with constraints, can solve problems such as complex calculations and achieve good operating performance

Active Publication Date: 2017-05-31
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

This solves the technical problem of complex calculations caused by the need to iteratively find the optimal value that satisfies the constraints within the constraint range in the prior art to solve the optimal value under the constraints of the motor

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  • Constraint condition-containing motor control method and constraint condition-containing motor control system

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[0038]In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0039] At first the deadbeat control algorithm involved in the present invention and the principle and advantages and disadvantages of the finite set model predictive control algorithm are explained:

[0040] The deadbeat control algorithm is a digital pulse width modulation (Pulse Width Modulation, PWM) control method. By establishing the deadbeat control mathematical model of the grid-connected...

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Abstract

The invention discloses a constraint condition-containing motor control method and a constraint condition-containing motor control system. The constraint condition-containing motor control method is characterized by setting a voltage constraint condition and a current constraint condition of a motor by considering a safe working range of the motor; firstly, collecting the current and the rotating speed of the motor at the current time k, and solving the control voltage of a dead-beat control algorithm at the time k; then, when the control voltage of the dead-beat control algorithm at the time k is positioned in a voltage vector space determined by the voltage constraint condition and is also positioned in a voltage vector space determined by the current constraint condition, processing a constraint problem that the motor faces by adopting the dead-beat control algorithm, otherwise, processing the constraint problem that the motor faces by adopting a finite set model prediction control algorithm. Since the finite set model prediction control algorithm is capable of conveniently processing and controlling the existing constraint problem, and the dead-beat control algorithm has good dynamic tracking performance, by combining the advantages of the finite set model prediction control algorithm and the dead-beat control algorithm, the motor is enabled to always have good running performance within a safe running region.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motor control, and more specifically relates to a motor control method and system with constraints. Background technique [0002] Permanent magnet synchronous motor has the characteristics of high power density and high operating efficiency, and is widely used in electric vehicles, rail transit, servo and other application fields. Through coordinate transformation, the brushless AC motor can be approximately equivalent to the traditional brushed DC motor, and then the motor running performance comparable to that of the DC motor can be obtained. [0003] As the requirements for motor performance become higher and higher, some advanced control algorithms have been developed and applied to the field of motor control to improve the dynamic response and steady-state tracking performance of the motor. Among them, the model predictive control algorithm can achieve the optimal contro...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00
CPCH02P21/0021
Inventor 徐伟邹剑桥叶才勇
Owner HUAZHONG UNIV OF SCI & TECH
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