IIRC, you should go the other way.  I larger value resistor increases the
load and therefore pulls the power out of the circuit quicker.
Most bleeder resistors I have ever seen are usually in the MegaOhm range.
For example, I use 1 megaohm bleeders on a polypropylene pulse capacitor
MMC, that pulses 15,000 volts input to a Tesla coil through a spark gap
(LRC) - to prevent the caps killing me if I accidentally go near them in any
short space of time after turning off the power supply ;)  IME, 100k seems
too low a resistance for a bleeder.


-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Jim Ruxton
Sent: Saturday, 8 February 2003 12:56 pm
To: PICLIST@MITVMA.MIT.EDU
Subject: [OT]: Whats an alternative to bleeder resistor


I'm designing a variable frequency drive, so rectifying and filtering a
120 volt AC wave. This results in about 160 volt's DC. When I turn it
off I bleed the voltage off through a couple of 1/2 watt 100k ohm
resistors. This seems to take for ever to bleed. Is my best option to
just reduce the ohms and increase the wattage to speed this up. Any
other simple solutions? Thanks.
Jim

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