Hello all!
I was thinking earlier about a npn darlington switching the primary side of a coil and wondered about the following:
If you have a coil with voltage of 10v, resistance of 10 ohms and current of 1 amp that is switched using a npn darlington transistor and you charge the coil for the 5 time constants to fully reach the 1 amp, will it take 5 time constants for the current to reach zero using a npn darlington? I assume if you were to use breaker points there would be more resistance but with a transistor darlington I would thing that there would be no additional resistance and it would take the same 5 time constants to reach 0 amps.
Am I kinda on the right track here?
Val
I was thinking earlier about a npn darlington switching the primary side of a coil and wondered about the following:
If you have a coil with voltage of 10v, resistance of 10 ohms and current of 1 amp that is switched using a npn darlington transistor and you charge the coil for the 5 time constants to fully reach the 1 amp, will it take 5 time constants for the current to reach zero using a npn darlington? I assume if you were to use breaker points there would be more resistance but with a transistor darlington I would thing that there would be no additional resistance and it would take the same 5 time constants to reach 0 amps.
Am I kinda on the right track here?
Val