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Post by andrew7931 on Feb 27, 2015 9:07:11 GMT
Hi guys
I have almost finished by 5" ruston type loco and I am thinking of what I could use in line with the motor to stop the electric being generated from free wheeling going back into the speed controller I was thinking of a diode but carnt seam to get one to take the amperage any ideas?
Thanks
Andrew
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marcf
Hi-poster
Posts: 170
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Post by marcf on Mar 2, 2015 6:44:18 GMT
I use a diode on my electrics and not had an issue.
Brought mine from eBay. I think it was 5 for £1.20
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Post by ajricher on Mar 7, 2015 17:06:19 GMT
Hi guys I have almost finished by 5" ruston type loco and I am thinking of what I could use in line with the motor to stop the electric being generated from free wheeling going back into the speed controller I was thinking of a diode but carnt seam to get one to take the amperage any ideas? Thanks Andrew It's probably not the ampereage taking it out but the peak inverse voltage (PIV). Make sure that whatever you're using for a diode is at least 200 PIV. The spikes something like that will generate are right up there - 50 PIV may not be enough. Also figure that 2X the current draw of the motor is a good rule of thumb for the diode - and diodes in general are cheap as chips anyway so don;t be afraid to go something a bit bigger than the minimum requirement. AH the joys of an EE degreee I don't use anymore...  |
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