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A Resonant Frequency Identification and Control Method of a Linear Oscillating Motor

A technology of oscillating motor and resonant frequency, which is applied in the field of frequency control of linear oscillating motors, can solve problems such as slow convergence speed, achieve fast convergence speed and improve response speed

Active Publication Date: 2021-03-26
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method for identifying and controlling the resonant frequency of a linear oscillating motor. The problem of slow convergence caused by determining the resonance frequency

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  • A Resonant Frequency Identification and Control Method of a Linear Oscillating Motor
  • A Resonant Frequency Identification and Control Method of a Linear Oscillating Motor
  • A Resonant Frequency Identification and Control Method of a Linear Oscillating Motor

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Embodiment Construction

[0036] 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.

[0037] The motor selected in this embodiment is a stator permanent magnet double-stator linear oscillation motor with a rated power of 120W, a rated operating frequency of 30Hz, a stator resistance of 18Ω, a stator inductance of 0.59H, and a thrust coefficient of 47.08N / A. The mass of the piston is 0.93kg.

[0038] Specifically, the present invention provides a method for identifying the resona...

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Abstract

The invention discloses a resonant frequency identification and control method for a linear oscillation motor, and the method comprises the steps: building a linear oscillation motor identification model based on the dynamic relation between a current and a displacement, carrying out the iterative calculation of the minimum value of a cost function of the linear oscillation motor identification model, accurately identifying the resonant frequency of the motor, and enabling the convergence speed to be higher. The invention provides a linear oscillation motor control method. According to the resonant frequency of the motor obtained by the resonant frequency identification method, the working frequency of the motor system is updated in real time, so that the actual operating frequency of thesystem is consistent with the resonant frequency, and the method can complete identification calculation when the system does not reach a steady state, thereby greatly improving the response speed ofthe system.

Description

technical field [0001] The invention belongs to the technical field of frequency control of linear oscillating motors, and more specifically relates to a resonance frequency identification and control method of a linear oscillating motor. Background technique [0002] Linear oscillating motors have great application prospects in the field of refrigeration. Compared with traditional rotary compressors, linear oscillating motors directly drive linear compressors have outstanding advantages such as high efficiency, small size, and low noise. To make linear oscillating motors In order to give full play to the advantages of high efficiency of the motor, its operating frequency must be controlled. The moving part of the linear oscillating motor is a second-order mechanical system combined with a mover piston and a spring, so there is a system resonance frequency point. Theoretical analysis shows that when the system operating frequency is equal to the system resonance frequency, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/14H02P21/13H02P25/06H02P25/032
CPCH02P21/13H02P21/14H02P25/06H02P25/032
Inventor 徐伟王启哲
Owner HUAZHONG UNIV OF SCI & TECH