This paper focuses on the electromagnetic compatibility (EMC) performance of a Very High Frequency (VHF) converter and how to lower the emissions. To test the EMC performance a VHF converter is implemented with a Class-E inverter and a Class-DE rectifier. The converter is designed to deliver 3 W to a 60 V LED, it has a switching frequency of 37 MHz and achieves an efficiency of 80%. For an LED driver to be used on the consumer market it has to fulfil the standard regarding EMC emissions. The conducted emission is often used as a reason to increase the switching frequency to the VHF range to avoid the regulations. This converter shows to be well below the levels for conducted emission even without filtering. For theradiated emissions the converter is above the limits without input and output filters. Several designs with different ways to lower the emissions are implemented and the different layouts and filtering are compared and discussed.
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机译：本文着重于甚高频（VHF）转换器的电磁兼容性（EMC）性能以及如何降低排放。为了测试EMC性能，将VHF转换器与E类逆变器和DE类整流器一起使用。该转换器设计用于向60 V LED提供3 W的功率，开关频率为37 MHz，效率达到80％。对于要在消费市场上使用的LED驱动器，它必须满足有关EMC辐射的标准。经常将传导发射用作将开关频率增加到VHF范围以避免规章的原因。即使不进行滤波，该转换器也显示出远低于传导发射的水平。对于辐射发射，转换器超出了没有输入和输出滤波器的限制。实现了几种采用不同方式降低排放的设计，并比较和讨论了不同的布局和滤波。
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