Design Requirements for High-Efficiency Electronic Ballasts

概要

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The energy loss of an electronic ballast is mainly composed of switch loss and induction loss. The loss decreases when setting the component values so as to reduce the phase angle of the road circuit. However, the lamp current limiting action falls and fails to stably operate the lamp. We have examined the ways to improve the control stability by using the loop transfer function, the bode plot in particular. By designing a control circuit with the experimentally measured loop transfer function and the transfer function of each functional circuit block, the tested lamp was able to operate stably.
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