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Resistance Torque Based Variable Duty-Cycle Control Method for a Stage II Compressor

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Abstract

The resistance torque of a piston stage II compressor generates strenuous fluctuations in a rotational period, and this can lead to negative influences on the working performance of the compressor. To restrain the strenuous fluctuations in the piston stage II compressor, a variable duty-cycle control method based on the resistance torque is proposed. A dynamic model of a stage II compressor is set up, and the resistance torque and other characteristic parameters are acquired as the control targets. Then, a variable duty-cycle control method is applied to track the resistance torque, thereby improving the working performance of the compressor. Simulated results show that the compressor, driven by the proposed method, requires lower current, while the rotating speed and the output torque remain comparable to the traditional variable-frequency control methods. A variable duty-cycle control system is developed, and the experimental results prove that the proposed method can help reduce the specific power, input power, and working noise of the compressor to 0.97 kW·m−3·min−1, 0.09 kW and 3.10 dB, respectively, under the same conditions of discharge pressure of 2.00 MPa and a discharge volume of 0.095 m3/min. The proposed variable duty-cycle control method tracks the resistance torque dynamically, and improves the working performance of a Stage II Compressor. The proposed variable duty-cycle control method can be applied to other compressors, and can provide theoretical guidance for the compressor.

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Authors and Affiliations

  1. College of Mechanical and Electrical Engineering, Jiaxing University, Jiaxing, 314001, China

    Meipeng ZHONG

  2. Institute of Chemical Machinery, Zhejiang University, Hangzhou, 310027, China

    Shuiying ZHENG

Authors
  1. Meipeng ZHONG
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  2. Shuiying ZHENG
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Correspondence to Meipeng ZHONG.

Additional information

Supported by National Natural Science Foundation of China (Grant No. 51275452), Zhejiang Provincical Natural Science Foundation of China (Grant No. LY14E050021), and Commonweal Technology Project of Science and Technology Department of Zhejiang Province, China (Grant No. 2015C31071).

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ZHONG, M., ZHENG, S. Resistance Torque Based Variable Duty-Cycle Control Method for a Stage II Compressor. Chin. J. Mech. Eng. 30, 876–887 (2017). https://doi.org/10.1007/s10033-017-0111-7

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  • DOI: https://doi.org/10.1007/s10033-017-0111-7

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