MRAS-based high-voltage asynchronous motor control method

A control method and technology of asynchronous motors, applied in the direction of motor generator control, AC motor control, electronic commutation motor control, etc., can solve the problems of high system complexity, low measurement accuracy, difficult maintenance, etc., and achieve high speed identification The effect of precision

Inactive Publication Date: 2016-06-01
JIANGSU FRONTIER ELECTRIC TECH +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention provides an MRAS-based high-voltage asynchronous motor control method to solve the current problem of high system complexity, difficult maintenance, and vulnerability to pure integ

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  • MRAS-based high-voltage asynchronous motor control method
  • MRAS-based high-voltage asynchronous motor control method
  • MRAS-based high-voltage asynchronous motor control method

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Embodiment Construction

[0026] The following description and drawings illustrate specific embodiments of the invention sufficiently to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of embodiments of the present invention includes the full scope of the claims, and all available equivalents of the claims. These embodiments of the present invention may be referred to herein, individually or collectively, by the term "invention", which is for convenience only and is not intended to automatically limit the application if in fact more than one invention is disclosed The scope is any individual invention or inventive concept.

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Abstract

The invention discloses an MRAS-based high-voltage asynchronous motor control method, which comprises the following steps: building a reference model of an active power of an asynchronous motor; building an adjustable model of a reactive power of the asynchronous motor; identifying the rotating speed of a motor rotor; obtaining three-phase sine voltage reference signals through a rotor flux-oriented vector control system; and transmitting the three-phase sine voltage reference signals to a pulse width modulation drive plate, controlling a cascaded power unit by a pulse width modulation control method and controlling the rotating speed of the motor. The disadvantages due to the fact that the motor rotor is provided with a photoelectric encoder are avoided; the defect that a counter electromotive force model is affected by a stator resistance error is overcome; and identification of the rotating speed of the motor is well achieved. By an instantaneous reactive power-based model, the control method has relatively high rotating speed identification precision and effectively improves the static and dynamic properties of the motor during starting, speed adjusting and steady-state operation.

Description

technical field [0001] The invention relates to a high-voltage asynchronous motor control method based on a cascaded high-voltage frequency converter, in particular to a high-voltage asynchronous motor control method based on a model parameter adaptive system (MRAS, ModelReferenceAdaptiveSystem), belonging to the technical field of power electronic automatic control. Background technique [0002] In recent years, high-voltage frequency converters have been widely used in electric power, metallurgy, chemical industry and other industrial occasions due to their remarkable energy-saving effect, while cascaded high-voltage frequency converters have less harmonic components and high sine degree in output waveforms, which have attracted attention. The control methods for the asynchronous motor system of the high-voltage frequency converter generally include constant voltage-frequency ratio control, vector control, etc. The constant voltage-frequency ratio control is an open-loop co...

Claims

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Application Information

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IPC IPC(8): H02P21/18H02P25/02
CPCH02P25/02
Inventor 黄学良王正齐姚新阳胡伟顾文徐钢唐一铭刘亚南王成亮吴涛
Owner JIANGSU FRONTIER ELECTRIC TECH
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