Hi Guys,
I notice this thread is quite old, but I wish to try out a time delay circuit for the ignition process on my electric race bike. The original poster had issues with the circuit, so I have come up with something that *should* work (see attached).
The idea is to power on the main contactor for the high voltage system with a ~7 second delay. During this time, a high wattage pre-charge resistor, placed across the high voltage terminals of the main contactor will be closed circuit from a second contactor, precharging the giant capacitors in the motor controller. The idea is that once charged, the delay will be sufficient to stop me from belting right across to the ON position, welding the contactor across the terminals due to a ~2000 A inrush current.
Hopefully the SPST relay doing this won't have issues with 115 volts?
Any advice is much appreciated.\Cheers,
CHRIS
I notice this thread is quite old, but I wish to try out a time delay circuit for the ignition process on my electric race bike. The original poster had issues with the circuit, so I have come up with something that *should* work (see attached).
The idea is to power on the main contactor for the high voltage system with a ~7 second delay. During this time, a high wattage pre-charge resistor, placed across the high voltage terminals of the main contactor will be closed circuit from a second contactor, precharging the giant capacitors in the motor controller. The idea is that once charged, the delay will be sufficient to stop me from belting right across to the ON position, welding the contactor across the terminals due to a ~2000 A inrush current.
Hopefully the SPST relay doing this won't have issues with 115 volts?
Any advice is much appreciated.\Cheers,
CHRIS
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