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RE: Model for Selenium Rectifier?

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In Reply to: RE: Model for Selenium Rectifier? posted by Lee of Omaha on October 13, 2009 at 15:37:14

In "looking" at the dynamics of reverse bias, the capacitance of the components may allow the zeners to see spikes which are far greater than their rated forward bias current. It should be transient, but.. When designing high-voltage power supplies, many years past, there weren't many options as far as high-voltage FETs. So we used to stack them in series. But, they had to be "balanced" with shunt capacitors to help evenly distribute the charge when they were switched open. I'm erring on the side of caution. I try to think of longevity when designing. On a side note, many folks replace selenium rectifiers with a simple series resistor/diode combination. I found this on the net: http://www.w3hwj.com/index_files/RBSelenium2.pdf

http://www.w3hwj.com/index_files/RBSelenium2.pdf (Open in New Window)

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Good Article - Lee of Omaha 08:47:18 10/14/09 (0)

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