A New Thin High Voltage Transformer Using FPC

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  • Sashida Kazuyuki
    Shindengen Electric Manufacturing Co., Ltd. Graduate School of Materials Science and Engineering, Ibaraki University
  • Takehara Natsuki
    Shindengen Electric Manufacturing Co., Ltd.
  • Onuki Jin
    Shindengen Electric Manufacturing Co., Ltd.
  • Sasajima Yasushi
    Graduate School of Materials Science and Engineering, Ibaraki University

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Other Title
  • FPCを使った薄型高圧トランスの開発
  • FPC オ ツカッタ ウスガタ コウアツ トランス ノ カイハツ

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<p>We have developed a new, thin, high-voltage transformer utilizing FPCs (Flexible Printed Circuits). In high-voltage power supplies, transformers are important components that convert low input voltages to high voltages. High-voltage transformers require a large number of turns, the capacitance formed between adjacent lines increases, the self-resonant frequency becomes low, and the switching frequency cannot be increased. Hence the switching frequency of the transformer cannot be increased. As a result, miniaturization is difficult. In recent years, FPCs have been used in various electronic devices by taking advantage of their thin and flexible performance. Focusing on the withstand voltage of this FPC and the ability to pattern with a fine pitch, we examined whether a high-voltage transformer could be developed. We also examined reducing the capacitance while maintaining the line withstand voltage. Furthermore, we devised a structure that folds the FPC while maintaining the withstand voltage, and developed a thin high-voltage transformer with a significantly smaller capacitance than conventional products.</p>

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