Method and device for controlling rotational speed of compressor

A compressor speed, compressor technology, applied in the direction of controlling electromechanical transmission, controlling generator, controlling electromechanical brake, etc., can solve the problems of compressor speed fluctuation and unsatisfactory fluctuation suppression effect, so as to reduce speed fluctuation and improve Control effect, reduce the effect of periodic fluctuations

Active Publication Date: 2019-04-02
QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although the prior art also has a method for suppressing the fluctuation of the compressor rotational speed, the fluctuation suppression effect is not ideal enough, and the problem of the fluctuation of the rotational speed of the compressor cannot be fundamentally solved

Method used

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  • Method and device for controlling rotational speed of compressor
  • Method and device for controlling rotational speed of compressor
  • Method and device for controlling rotational speed of compressor

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Embodiment Construction

[0052] 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.

[0053] See figure 1 , which is a flow chart of an embodiment of the method for controlling the rotational speed of a compressor based on the present invention.

[0054] Such as figure 1 shown, combined with figure 2 A control block diagram is shown, and this embodiment adopts the process that comprises the following steps to realize the speed control of the compressor:

[0055] Step 11: Obtain an axis error Δθ reflecting the deviation between the actual position and the estimated position of the compressor rotor.

[0056] In the compressor control, the phase of the compressor rotor can be locked through the phase-locked loop (PLL) control technology, so that it can be locked at the target phase. The control block diagram of the phase-locked loo...

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Abstract

The invention discloses a method and a device for controlling the rotational speed of a compressor. The method comprises the following steps: obtaining the axis error reflecting the bias of the actualposition and the constructive position of the rotor of the compressor; carrying out filtering processing on the axis error to obtain axis error compensation quantity after at least a part of axis error is filtered; taking the axis error compensation quantity as an input quantity to be put into a phase-locked loop adjuster in a phase-locked loop used for compressor control to obtain the output angular speed of the phase-locked loop adjuster; taking the output angular speed of the phase-locked loop adjuster as an input quantity to be put into a speed ring adjuster in a speed ring used for compressor control to obtain the output torque of the speed ring adjuster; using the output angular speed of the phase-locked loop adjuster to correct real-time angular speed used for compressor control, and controlling the compressor according to the corrected real-time angular speed and the output torque of the speed ring adjuster. By using the method, the rotational speed fluctuation inhibition effectiveness of the compressor can be improved.

Description

technical field [0001] The invention belongs to the technical field of motor control, specifically relates to compressor control technology, and more specifically relates to a method and device for controlling the rotational speed of a compressor. Background technique [0002] When the compressor used in the air conditioner is running, it is affected by the working principle and control technology of the air conditioner as a load, which makes the load torque of the compressor extremely unstable, easily causing large speed fluctuations, and the compressor is not running smoothly. The unstable operation of the compressor will lead to unstable operation of the entire air conditioner system, causing various adverse effects. Moreover, the unstable operation will also generate relatively large operating noise, which cannot meet the requirements of relevant noise standards and affect the comfort of the air conditioner. This phenomenon is especially serious in single-rotor compress...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/05F04B49/06
CPCF04B49/06H02P21/05
Inventor 史为品刘金龙许国景刘聚科程永甫
Owner QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD
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