A compressor speed control method and device
A technology of compressor speed and control method, applied in the direction of suppressing motor vibration control, machine/engine, etc., can solve the problems of compressor speed fluctuation, the effect of speed fluctuation suppression is not ideal, etc., to reduce speed fluctuation, improve control effect, Reduce the effect of periodic fluctuations
Active Publication Date: 2021-07-23
CHONGQING HAIER AIR CONDITIONER CO LTD +2
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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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[0045] 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.
[0046] 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.
[0047] 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:
[0048] Step 11: Obtain an axis error Δθ reflecting the deviation between the actual position and the estimated position of the compressor rotor.
[0049] 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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The invention discloses a method and device for controlling the rotational speed of a compressor. The method includes: obtaining an axis error reflecting the deviation between the actual position and the estimated position of the compressor rotor; performing filtering on the axis error to obtain at least a filtered part The shaft error compensation amount after the shaft error fluctuates; the shaft error compensation amount is input to the phase-locked loop regulator in the compressor control phase-locked loop as the input amount, and the output angular velocity of the phase-locked loop regulator is obtained; The output angular velocity of the phase-locked loop regulator is input to the speed loop regulator in the compressor control speed loop as an input to obtain the output torque of the speed loop regulator; using the output angular velocity of the phase-locked loop regulator The real-time angular velocity used for compressor control is corrected, and the compressor is controlled according to the corrected real-time angular velocity and the output torque of the speed loop regulator. By applying the present invention, the effectiveness of suppressing the fluctuation of the rotational speed 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, 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 compressors...
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IPC IPC(8): F04C28/08F04C28/28H02P23/04
Inventor 史为品刘金龙许国景刘聚科程永甫
Owner CHONGQING HAIER AIR CONDITIONER CO LTD