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首页> 外文期刊>EPE Journal: European Power Electronics and Drives >An efficient ripple-free LED driver with zero-voltage switching for street lighting applications
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An efficient ripple-free LED driver with zero-voltage switching for street lighting applications

机译：一种有效的纹波LED驱动器，具有零电压切换，用于街道照明应用

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摘要

An efficient ripple-free light-emitting diode (LED) driver circuit is proposed with zero-voltage switching (ZVS) and dimming control. The proposed driver circuit utilizes a full-bridge configuration. The LED lamp current is the sum of two inductor currents which are out of phase. This makes the LED lamp current ripple free. Larger portion of lamp power is supplied by the dc voltage source connected in series with LED lamp. Small amount of power is processed by bridge circuit. Devices of the bridge circuit conduct only ripple current of the load inductor and a small current of an inductor which helps in ZVS. Hence, both conduction and switching losses are reduced. In addition, LED lamp current can be regulated at required operating current. The dimming feature is attained by on-off control method. This proposed configuration also helps in reducing components count. An experimental prototype of 87 W has been developed and tested at full load and different dimming levels. Experimental results validate simulation results.
机译：提出了一种有效的纹波发光二极管（LED）驱动电路，具有零电压切换（ZVS）和调光控制。所提出的驱动器电路利用全桥配置。 LED灯电流是两个异常电流的总和。这使得LED灯电流自由纹波。较大的灯泡电源由与LED灯串联连接的DC电压源提供。桥电路处理少量功率。桥接电路的装置仅导致负载电感器的纹波电流和电感器的小电流，其有助于ZVS。因此，传导和切换损耗都减少了。此外，可以在所需的工作电流下调节LED灯电流。通过开关控制方法实现调光功能。这种建议的配置还有助于减少组件计数。在满载和不同调光水平的情况下开发和测试了87 W的实验原型。实验结果验证了仿真结果。

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