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Using SCR's as a rectifier bridge (experimental)

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tecker:
Ok I'll check ebay from time to time . I'm leaning toward a PnP NpN pair as a rectifier to allow low speed charging some chance . I think a closed loop with a sensing coil is a just what the doctor ordered . i just picked up some mj2955s to set up a rectifier with 2n3055 .
The idea is to be in time with the stator and conduct hard when the rotor drops in the conduction hole and release when the rotor would normally Buck .

JW:
I did recieve the GE book on SCR's that I ordered off ebay for $3.00

Here are some pictures-









The book seems pretty good, I was thumbing thru it the other night, cant find the same circuits I was thinking of, but this one is close. :ie 2 SCR's and 2 Rectifier diodes make up the bridge.

Im really interested in casting a "rectifier coil" in the stator im working on. I have 8 magnets 2in by 2in by .5in thick.

Im going to use dual dotors with three coils in the stator. Not sure of the best prop size, but thats the starting point...

-edit-The single phase rectifier circuit wont work for my application, it will have to be a 3phase rectifier-

Ya, if your watching ebay alot,  the "new old stock" is sold for dirt cheap, have to be in the right place at the right time I guess.

definitionofis:

--- Quote from: JW on March 17, 2012, 10:24:57 AM ---Here's a simple schematic of the connections

(Attachment Link)

--- End quote ---

I joined fieldlines just so I could post a message to say I think that diode, which is tied to the SCR gate, is backwards.

I am using some old SCRs as diodes and I was hunting the internet to confirm my idea.
I tested at less than 6 volts, without a gate diode. I am just tying gate to anode). The idea works.
 
I added the gate diode so I can block negative gate voltage so as to not harm the gate. Thanks for the idea.

Coincidentally, I pressed NEXT and the next thread that came up was about LTC3703 as a buck converter for MPPT for a wind turbine.
I'll post about my LTC3703 project on that thread.

JW:
Bump

JW:
bump

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