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SCR dropping voltage

vaibhav

Aug 30, 2012
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Aug 30, 2012
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What is so difficult about showing us your gnd connection? Or showing us a moderately complete circuit diagram?

- How is G2 connected?
- How are the cathodes of T1 and T2 connnected?
- How are the microcontroller's ground and the high voltage ground connected?


As you show it, the microcontroller is not isolated from the high voltage. There is only a 10 kOhm resistor which is insufficient to ensure safety. This circuit definitely looks dangerous!


Sir here I have attached documents with some modifications please see that & suggest us a circuit.
 

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  • 3 phase info text1.txt
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(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Several solutions have already been suggested. Transformers or optocouplers can be used.
 

vaibhav

Aug 30, 2012
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Several solutions have already been suggested. Transformers or optocouplers can be used.




We dont want to use transformer as it;s costly sir & optocoupler also bcoz we want to control the speed so for triggering scr only, we want circuit without any SCR burning.
 

Harald Kapp

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Still no gnd.
What about "showing us your gnd connection" don't you understand?

Have you read any of the texts on scrs that I gave you the links?

We dont want to use transformer as it;s costly sir & optocoupler
These are for safety. Do you want to trade safety for a few cents worth of optocouplers? That is silly and life-threatening
 
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