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Effects of temperature on control performance of magnetically levitated planar actuators

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Abstract

During the operation of magnetically levitated planar actuators (MLPAs), the temperature of current coils is rising and the resistance varies in proportion, thus changing the current loop’s gain and directly affecting the system’s control performance. The coil temperature also affects the temperature of adjacent magnetic steel, attenuating the residual flux density of magnetic steel and changing the driving force and torque outputted from coils. In this paper, we analyzed the effects of temperature rise on the control performance of MLPAs. 1) A coil temperature analytical model was used to compute real-time coil temperature, and the temperature parameters were predicted to linearly modify the servo gain coefficient of current loop controller, ensuring that the dynamic performance of current loop is consistent during the operation of MLPAs. 2) A correction factor modifying the effect of temperature on magnetic field intensity was added into the current decoupled model, which improved the precision of the dynamics model and satisfied the strict requirement on the precision of MLPAs.

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Abbreviations

MLPAs:

Magnetically levitated planar actuators

B-T:

Temperature Coefficient of Br

HPPA:

herringbone pattern planar actuator

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Authors and Affiliations

  1. State Key Lab of Digital Manufacturing Equipment & Technology, Huazhong University of Science & Technology, Wuhan, P.R. China, 430074

    Rou-gang Zhou, Si-jie Yan & Yun-fei Zhou

  2. The Department of Mechanical & Electrical Engineering, Wuhan University of Technology, Wuhan, P.R. China, 430074

    Xin Cheng

  3. Hangzhou MSTAR Technologies,Inc, Hangzhou, P.R. China, 310000

    Chou Jay Tsai Chien

Authors
  1. Rou-gang Zhou
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  2. Si-jie Yan
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  3. Yun-fei Zhou
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  4. Xin Cheng
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  5. Chou Jay Tsai Chien
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Corresponding author

Correspondence to Rou-gang Zhou.

Additional information

Rou-gang Zhou and Si-jie Yan contributed equally to this work

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Zhou, Rg., Yan, Sj., Zhou, Yf. et al. Effects of temperature on control performance of magnetically levitated planar actuators. Int. J. Precis. Eng. Manuf. 16, 43–51 (2015). https://doi.org/10.1007/s12541-015-0005-5

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  • DOI: https://doi.org/10.1007/s12541-015-0005-5

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