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Method and device for controlling rotating speed of compressor

A compressor speed, compressor technology, applied in pump control, mechanical equipment, machine/engine, etc., can solve the problems of compressor speed fluctuation and the effect of suppressing speed fluctuation is not ideal, so as to reduce the speed fluctuation and improve the control effect. , the effect of reducing cyclical fluctuations

Active Publication Date: 2019-03-15
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 for controlling rotating speed of compressor
  • Method and device for controlling rotating speed of compressor
  • Method and device for controlling rotating speed of compressor

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Embodiment Construction

[0049] 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.

[0050] 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.

[0051] 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:

[0052] Step 11: Obtain an axis error Δθ reflecting the deviation between the actual position and the estimated position of the compressor rotor.

[0053] 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...

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Abstract

The invention discloses a method and device for controlling the rotating speed of a compressor. The method includes the steps that the axis error reflecting the deviation of the practical position andthe presumed position of a compressor rotor is obtained; filtering treatment is conducted on the axis error, and the axis error compensation dosage generated after at least part of axis error fluctuation is filtered out is obtained; the axis error compensation dosage serves as the input quantity to be input to a phase lock loop adjusting device in a phase lock loop used for compressor control, and the output angular speed of the phase lock loop adjusting device is obtained; the output angular speed of the phase lock loop adjusting device serves as the input quantity to be input to a speed loop adjusting device in a speed loop used for compressor control, and the output torque of the speed loop adjusting device is obtained; and the output angular speed of the phase lock loop adjusting device is used for correcting the real-time angular speed used for compressor control, and the compressor is controlled according to the corrected real-time angular speed and the output torque of the speed loop adjusting device. By the application of the method and device, effectiveness of rotating speed fluctuation inhibition of the compressor can be improved.

Description

technical field [0001] The invention belongs to the technical field of motor control, in particular 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 compres...

Claims

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Application Information

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IPC IPC(8): F04C28/08F04C28/28
CPCF04C28/08F04C28/28F04C2270/0525
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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