Journal of international Conference on Electrical Machines and Systems

Journal of International Conference on Electrical Machines and Systems (대한전기학회 분과)
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A Straightforward Estimation Approach for Determining Parasitic Capacitance of Inductors during High Frequency Operation

  • Kanzi, Khalil (ACECR, K.N. Toosi Branch) ;
  • Nafissi, Hanidreza R. (ACECR, K.N. Toosi Branch) ;
  • Kanzi, Majid (ACECR, K.N. Toosi Branch)
  • Received : 2014.06.10
  • Accepted : 2014.07.12
  • Published : 2014.09.01
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Abstract

A straightforward method for optimal determining of a high frequency inductor's parasitic capacitance is presented. The proposed estimation method is based on measuring the inductor's impedance samples over a limited frequency range bordering on the resonance point considering k-dB deviation from the maximum impedance. An optimized solution to k could be obtained by minimizing the root mean squared error between the measured and the estimated impedance values. The model used to provide the estimations is a parallel RLC circuit valid at resonance frequency which will be transferred to the real model considering the mentioned interval of frequencies. A straightforward algorithm is suggested and programmed using MATLAB which does not require a wide knowledge of design parameters and could be implemented using a spectrum analyzer. The inputs are the measured impedance samples as a function of frequency along with the diameter of the conductors. The suggested algorithm practically provides the estimated parameters of a real inductance model at different frequencies, with or without design information. The suggested work is different from designing a high frequency inductor; it is rather concentration of determining the parameters of an available real inductor that could be easily done by a recipe provided to a technician.

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References

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