关于LED灯Harmonic的问题
LED 灯的额定电压是110V,是不是不用测Harmonic或即使测试fail 也无需整改,因为法规里有这样一段话: The test voltage (U) shall be the rated voltage of the equipment. In the case of a voltagerange, the test voltage shall be 230 V or 400 V for single-phase or three-phase suppliesrespectively.另:harmonic 的issue 如不加PFC 该如何解决?谢谢! 110V我理解是不用测 我觉得是的,低于220V就不用测谐波了。
IEC61000-3-2 里也有这样的描述:
1 Scope: ... For systems with nominal voltages less than 220 V (line-to-neutral), the limits have not yetbeen considered...
6 General requirements:...The requirements and limits specified in this clause are applicable to the power input terminals of equipment intended to be connected to 220/380 V, 230/400 V and 240/415 V systems operating at 50 Hz or 60 Hz. Requirements and limits for other cases are not yet considered... 谐波的电压测试范围是220-240V对于单相设备来说,因此110V的是不用测试的。 原来是这样啊 PFC分有源的和无源的,要抑制谐波还是离不开PFC。 日本和美国的电压都是110V/60Hz,如果按抑制谐波的初衷来说,应该也要测啊,为什么不测?
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