Method and device of controlling rotating speed of compressor

A compressor speed and compressor technology, which is applied in refrigerators, heating and ventilation control systems, heating methods, etc., can solve the problems of compressor speed fluctuations, and the effect of suppressing speed fluctuations is not ideal, so as to reduce speed fluctuations and improve Control effects, fast suppression effects

Active Publication Date: 2019-05-07
CHONGQING HAIER AIR CONDITIONER CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although there are methods for controlling the speed of the compressor in the prior art, the effect of suppressing the fluctuation of the speed is not ideal, and the problem of the fluctuation of the speed of the compressor cannot be fundamentally solved.

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  • Method and device of controlling rotating speed of compressor
  • Method and device of controlling rotating speed of compressor
  • Method and device of controlling rotating speed of compressor

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Embodiment Construction

[0050] 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.

[0051] 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.

[0052] like 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:

[0053] Step 11: Obtain an axis error Δθ reflecting the deviation between the actual position and the estimated position of the compressor rotor.

[0054] In compressor control, the phase of the compressor rotor can be locked by the phase-locked loop (PLL) control technology to lock it at the target phase. The control block diagram of the phase-locked loop is as follows figure 2 ...

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Abstract

The invention discloses a method and device of controlling the rotating speed of a compressor. The method comprises the steps that an axis error which reflects the deviation between the practical position and the presumptive position of a compressor rotor is acquired; the axis error is subjected to filtering treatment, so that a corrected axis error which is formed after at least one part of the axis error fluctuation is filtered away and the angular speed compensation quantity which corresponds to the corrected axis error are obtained; the angular speed compensation quantity compensates for the output angular speed of a phase-locked loop regulator in a phase-locked loop of the compressor, so that the compensated angular speed output quantity is obtained; meanwhile, the output angular speed of the phase-locked loop regulator is inputted into a speed loop regulator in a speed loop by serving as the input quantity; and the real-time angular speed for compressor control is corrected according to the compensated angular speed output quantity, and the compressor is controlled according to the corrected real-time angular speed and the output torque of the speed loop regulator. By use ofthe method and device, the effectiveness of suppression of the rotating speed fluctuation 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): F25B49/02F24F11/86F04C28/08F04C28/28
Inventor 史为品刘金龙许国景刘聚科程永甫
Owner CHONGQING HAIER AIR CONDITIONER CO LTD
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