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Method and device for predicting and controlling currents of a single current sensor of a permanent magnet synchronous motor

A permanent magnet synchronous motor, current prediction technology, applied in the direction of single-phase motor control, motor generator control, control of electromechanical transmission devices, etc., to achieve the effect of servo control, simplify hardware system, and reduce costs

Active Publication Date: 2018-09-11
科力尔电机集团股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of the present invention provides a method and device for current predictive control of a permanent magnet synchronous motor with a single current sensor, aiming to solve the problem of how to maintain high-precision servo control of the motor in the case of only a single-phase current sensor

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  • Method and device for predicting and controlling currents of a single current sensor of a permanent magnet synchronous motor
  • Method and device for predicting and controlling currents of a single current sensor of a permanent magnet synchronous motor

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Embodiment Construction

[0036] The following description and drawings illustrate specific embodiments of the invention sufficiently to enable those skilled in the art to practice them. The embodiments merely represent possible variations, individual components and functions are optional unless explicitly required, and the order of operations may be varied. 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. Herein, various embodiments may be referred to individually or collectively by the term "invention", which is for convenience only and is not intended to automatically limit the scope of this application if in fact more than one invention is disclosed. A single invention or inventive concept. Herein, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusio...

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Abstract

The invention discloses a method and a device for predicting and controlling currents of a single current sensor of a permanent magnet synchronous motor, belonging to the control field of a permanentmagnet synchronous motor. The method comprises the following steps: obtaining the single-phase current value, the rotating speed, the electric angle and the phase voltage value of the motor; determining a phase-shifting current value according to the single-phase current value and a phase-shifting algorithm; determining a predicted current value on the basis of the rotating speed, the electric angle, the phase voltage value and a current prediction model; determining an optimal weight coefficient on the basis of the Kalman filter algorithm; and determining an optimal correction current value on the basis of the phase-shifting current value, the predicted current value and the optimal weight coefficient. The method and the device have the following beneficial effects: an accurate current value can be obtained by the method in the case of only the single-phase current sensor, high-precision control over the motor can be realized, the control performance is basically consistent with thatof a conventional double-current sensor, and the control system is easier and more economical.

Description

technical field [0001] The invention relates to the technical field of permanent magnet synchronous motor control, in particular to a method and device for current predictive control of a single current sensor of a permanent magnet synchronous motor. Background technique [0002] The permanent magnet synchronous motor servo system generally adopts a hierarchical feedback control structure nested with three loops of current loop, speed loop and position loop, and the closed-loop performance of the current loop is particularly critical. The traditional permanent magnet synchronous motor drive system contains two current sensors. The introduction of multiple physical sensors reduces the safety and stability of the system under the conditions of complex electromagnetic environment, overvoltage, overcurrent and misoperation, and increases the cost and system complexity. [0003] In view of the existing problems of the multi-sensor system, in order to make the surface-mounted per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/22H02P6/26
CPCH02P6/26H02P21/22
Inventor 杨明龙江李英强徐殿国聂鹏举唐新荣
Owner 科力尔电机集团股份有限公司
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