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Compressor low-frequency vibration suppression method and system

A low-frequency vibration and compressor technology, which is applied in the field of compressor control, can solve the problem that the compressor torque cannot be effectively compensated for the accurate suppression of the low-frequency vibration of the compressor, and achieve the effect of good compensation and improved control accuracy.

Active Publication Date: 2022-02-25
HISENSE (SHANDONG) AIR CONDITIONING CO LTD
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Problems solved by technology

However, since this torque compensation method adopts a solidified torque curve, the same torque curve is used under different working conditions and different loads, which cannot achieve effective compensation of compressor torque under different working conditions and accurate suppression of low-frequency vibration of the compressor

Method used

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  • Compressor low-frequency vibration suppression method and system
  • Compressor low-frequency vibration suppression method and system

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Embodiment Construction

[0053] Specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0054] refer to figure 1 , figure 2 As shown, the embodiment of the present invention provides a compressor low-frequency vibration suppression method, the specific method is:

[0055] (1) Collect the motor rotor speed and position angle information, use the collected position angle information as the position feedback value of the position loop regulator, and use the deviation between the position feedback value and the given position target value as the position loop regulator Input, after PI adjustment, the output value of the position loop regulator is used as the speed target value n of the speed loop regulator * ref ; Use the collected motor rotor speed as the speed feedback value n of the speed loop regulator ref , the speed target value n * ref and speed feedback value n ref The deviation between is used as the input of the speed...

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Abstract

The invention relates to a compressor low-frequency vibration suppression method and system. The method includes: constructing a rotor compressor torque model and a compressor electromagnetic torque model; calculating the q-axis torque according to the rotor compressor torque model and the compressor electromagnetic torque model Compensation current value Δi q , to generate a torque compensation curve; the q-axis torque compensation current value Δi q and q-axis current component reference value i q_ref After the addition, the reference value i of the q-axis feedforward compensation current component is obtained * q_ref . The present invention calculates the q-axis torque compensation current value Δi by constructing the torque model of the rotor compressor and the electromagnetic torque model of the compressor q , and the q-axis torque compensation current value Δi q Feedforward to current component reference i q_ref for real-time control. The torque compensation curve changes with different working conditions, which can realize effective compensation of compressor torque and precise suppression of low-frequency vibration of the compressor under different working conditions. At the same time, the present invention also provides a corresponding control system for suppressing low-frequency noise of the compressor.

Description

technical field [0001] The invention belongs to the technical field of compressor control, and in particular relates to a method and system for suppressing low-frequency vibration of a compressor. Background technique [0002] Due to its eccentric installation, the existing rotary compressors have periodic torque changes at low speeds, and the speed changes when the speed control cannot track at high speeds, which has become the cause of vibration and noise of the outdoor unit of the air conditioner. At present, the torque compensation method is mainly used to suppress the low-frequency vibration of the compressor. [0003] However, the existing torque compensation method mainly adopts a curve fitting method for compensation, the amplitude of the compensation current is controlled by PI, and the phase of the compensation current is obtained by curve fitting. The torque curve is a fixed curve, and through angle compensation, the solidified torque curve and the actual torque ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/05H02P21/14H02P21/18F04C28/08
CPCH02P21/05H02P21/14H02P21/18F04C28/08
Inventor 荣晓明张永良
Owner HISENSE (SHANDONG) AIR CONDITIONING CO LTD
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