The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Isolation Amplifier Circuits for Sensing and Feedback of the Inverter DC-Link Voltage

인버터의 직류링크 전압 검출 및 궤환을 위한 절연앰프 회로

  • Received : 2014.08.18
  • Accepted : 2014.10.07
  • Published : 2014.12.20
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Abstract

This study proposes an isolation amplifier circuit for the sensing and feedback of inverter DC-link voltage, which is inevitable for the precise control of inverter output voltage. The isolation amplifier consists of a pulse-width modulator and a pulse transformer with dual secondary windings. The accuracy of the proposed circuit depends on the precise matching of filter parameters in dual secondary circuits. The influences of parameter inaccuracy on the amplifier performances are analyzed. A modified circuit is proposed to reduce the dependency on filter parameters. The validity of the proposed method is verified through simulation and experiment.

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References

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Cited by

  1. DC-Link Voltage Measurement Method Suitable for Power Converter Systems Controlled by a μ-Controller vol.30, pp.12, 2015, https://doi.org/10.1109/TPEL.2015.2435034