Suppression of Leakage Current and Distortion in Variable Capacitance Devices and their Application to AC Power Regulators

Akihiko Katsuki; Takuya Oki

Suppression of Leakage Current and Distortion in Variable Capacitance Devices and their Application to AC Power Regulators

Akihiko Katsuki

Takuya Oki

Vol. 16, No. 1, pp. 66-73, Jan. 2016

10.6113/JPE.2016.16.1.66

Variable capacitance device

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Abstract

The quantity of alternating current (AC) leakage and the value of distortion factor in capacitor currents are discussed with regard to a new power component called variable capacitance device (VCD). This component has terminals for controlling its capacitance. Nonlinear dielectric characteristics are utilized in this device to vary the capacitance. When VCD operates in an AC circuit, the AC leakage from this device through direct current (DC) control voltage source increases according to the conditions of DC control voltage and so on. To solve this problem, we propose techniques for suppressing AC leakage. Although VCD has strong nonlinear characteristics, the current through the capacitor is not distorted significantly. The relations between AC leakage and the distortion in current waveforms are investigated. An application example for an AC power regulator is also introduced to evaluate the distortion in waveforms.

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Cite this article

[IEEE Style]

A. Katsuki and T. Oki, "Suppression of Leakage Current and Distortion in Variable Capacitance Devices and their Application to AC Power Regulators," Journal of Power Electronics, vol. 16, no. 1, pp. 66-73, 2016. DOI: 10.6113/JPE.2016.16.1.66.

[ACM Style]

Akihiko Katsuki and Takuya Oki. 2016. Suppression of Leakage Current and Distortion in Variable Capacitance Devices and their Application to AC Power Regulators. Journal of Power Electronics, 16, 1, (2016), 66-73. DOI: 10.6113/JPE.2016.16.1.66.