adams 发表于 2008-11-5 10:15

关于ripple free

新出60598－1，2008标准中ELV里提到的voltage which does not exceed 50 V a.c.r.m.s. or 120V ripple free d.c.between,提到的ripple free是指代什么值，在这段话下面有个NOTE “ripple free"is
conventionally defined for sinusoidal ripple voltage as a ripple content of not more than 10% r.m.s.:t he maximum peak value does not exceed 140 V for a nominal 120 V ripple-free d.c. system.
这里的计算是如何得出的，假设已知peak值是140 V和120 Vripple-free d.c. 这样可以计算出ripple voltage as a ripple content of not more than 10% r.m.s.么？如果可以如何计算？

sabrina 发表于 2008-11-5 10:25

待大人解答
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