Predication control method for brushless DC motor drive system

A brush DC motor and drive system technology, which is applied in the field of predictive control of brushless DC motor drive systems, can solve problems such as unfavorable hardware implementation and huge data, and achieve the effects of easy practical application, simplified data volume, and improved control characteristics

Active Publication Date: 2017-08-18
SHENZHEN MORC CONTROLS
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Problems solved by technology

[0002] In the brushless DC motor drive system, the motor drive system is composed of the motor body, inverter, sensor and controller. The analysis and involvement of the motor control system are mostly based on the mathematical model of the inverter and the motor. The inverter is based on the controller The switching signal sent out modulates a voltage pulse sequence of a certain frequency and amplitude, which is a typical nonlinear link. These voltage pulses act on the inductive motor winding to generate a continuous state current. Therefore, the inverter and the motor constitute a A hybrid system driven by discrete events with continuous state evolution, the traditional predictive control method of the brushless D...

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  • Predication control method for brushless DC motor drive system
  • Predication control method for brushless DC motor drive system

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[0017] The invention will be further described below with reference to the accompanying drawings and in combination with specific embodiments, so that those skilled in the art can implement it by referring to the description, and the protection scope of the present invention is not limited to the specific embodiments.

[0018] The invention relates to a predictive control method for a brushless DC motor drive system, a modeling method for a brushless DC motor drive system based on a hybrid logic dynamic model, and the brushless DC motor drive system includes a power supply, a brushless DC motor, a sensor, and a controller. The brushless DC motor is composed of a constant voltage source, a motor body and a three-phase full-bridge inverter. The motor body includes a three-phase symmetrical star winding and three opposite electromotive forces. The three-phase full-bridge inverter It consists of three half-bridge circuits obtained by connecting six power switching devices in series...

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Abstract

The invention relates to a predication control method for a brushless DC motor drive system. According to the invention, current value of a practical system and a current value based on a hybrid logic dynamic model and subjected to state estimation are collected and compared, and future parameters are predicated according to history parameters of the system, namely, state estimation is performed on the system. Current is taken as the major control object of the design in the invention. The controller takes comparison signals of inverter output signals of the practical brushless DC motor drive system and output signals of the state estimator as reference signals. After estimation of future moment parameters of the system is performed, an optimized target function is set, so that the optimal control volume of the next moment is selected and an aim of prediction control is achieved. By adopting the method, data volume is simplified, control features of the brushless DC motor are improved, inhibition on electromagnetic torque pulse is realized and practical application is facilitated.

Description

technical field [0001] The invention relates to the technical field of a brushless DC motor drive system, in particular to a predictive control method for a brushless DC motor drive system. Background technique [0002] In the brushless DC motor drive system, the motor drive system is composed of the motor body, inverter, sensor and controller. The analysis and involvement of the motor control system are mostly based on the mathematical model of the inverter and the motor. The inverter is based on the controller The switching signal sent out modulates a voltage pulse sequence of a certain frequency and amplitude, which is a typical nonlinear link. These voltage pulses act on the inductive motor winding to generate a continuous state current. Therefore, the inverter and the motor constitute a A hybrid system driven by discrete events with continuous state evolution, the traditional predictive control method of the brushless DC motor drive system regards the power switching de...

Claims

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Application Information

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IPC IPC(8): H02P21/05H02P21/22H02P6/182
CPCH02P6/182H02P21/05
Inventor 李自成张晶晶罗放王后能曾丽
Owner SHENZHEN MORC CONTROLS
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