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Two-axis secondary distribution nonlinear decoupling permanent magnet motor rotating speed control method

A speed control and permanent magnet motor technology, which is applied in the direction of motor generator control, AC motor control, electronic commutation motor control, etc., can solve problems such as improper control energy distribution and difficult decoupling, and achieve control energy reduction and flexible methods , the effect of high innovation value and practical value

Active Publication Date: 2021-07-27
YANTAI UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a permanent magnet motor speed control method using two-axis secondary distribution nonlinear decoupling, and then overcome the problem of improper control energy distribution caused by serious two-axis nonlinear coupling and difficult decoupling of existing motors

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  • Two-axis secondary distribution nonlinear decoupling permanent magnet motor rotating speed control method
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  • Two-axis secondary distribution nonlinear decoupling permanent magnet motor rotating speed control method

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Embodiment Construction

[0078] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the invention. However, those skilled in the art will appreciate that the technical solution of the present invention may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other instances, well-known technical solutions have not been shown or descr...

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Abstract

The invention discloses a two-axis secondary distribution nonlinear decoupling permanent magnet motor rotating speed control method. An error signal is obtained by measuring the rotating speed of a permanent magnet synchronous motor and comparing the rotating speed with an expected value, then a damping network is constructed to obtain an expected signal of a first axis, a two-axis linkage mode is set, secondary distribution is carried out, the expected signal is decomposed into two axial directions, an ideal current distribution value of the double axes is obtained, then the damping network and an error accumulation algorithm are constructed, and tracking control is carried out on double-shaft current to achieve tracking of the rotating speed of the motor. According to an existing motor control method, the current of one axis is stabilized in a zero state, so that two-axis nonlinear coupling of the motor is decoupled, and then the current of the other shaft is adopted to control the rotating speed of the motor to track an expected value. According to the method, non-linearity of the motor system is directly decoupled through a two-shaft secondary distribution method, so that steady-state values of double-shaft currents are in a non-zero state, and control distribution and energy distribution are achieved.

Description

technical field [0001] The invention relates to the field of permanent magnet synchronous motors, in particular to a method for realizing stable control of the rotational speed of permanent magnet synchronous motors by adopting nonlinear decoupling feedback of two-axis linkage. Background technique [0002] Permanent magnet synchronous motors are widely used in industrial production, and their speed control research has important economic value and market value. At present, the traditional motor speed control mostly adopts the classic one-axis current stable tracking to zero, and realizes the indirect decoupling method of the coupling term of the multiplication of the two-axis current of the motor, while the control of the other axis current is used to realize the control of the motor speed. control. Although this method has a clear idea, because it is an indirect decoupling method, and the current of one axis is zero, the control amount of the other axis will inevitably be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/22H02P25/022
CPCH02P21/22H02P25/022
Inventor 杨咏东孙卫明李剑平王新宇
Owner YANTAI UNIV
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