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Hi, I am new to the forum so firstly hello all. I have a basic understanding of auto electronics but have encountered a problem that is beyond me and need your help.
I am retrofitting a dynostart (startermotor/generator) to a dumper engine that was previously hand-crank start.
It is a Hitachi unit commonly used on petrol golf carts and Russian Ural motorcycles!
The problem I have is that once the engine is running and charging begins, it is designed to send the charge current back along the same cable used for the starting current.
So having started the engine, once I release the starter button (de-energising the starter solenoid) the circuit is broken and no charge can be returned to the battery.
The golf cart uses a constant duty starter- solenoid to overcome this with a more complex control unit.
According to my research the Russian Ural 650, however, uses a 'high current silicone rectifier diode'across the switched/large solenoid terminals allowing current to return to the battery during charging but blocking it from trying to activate the starter motor.
This is where I am struggling and need your help. Sadly I cannot seem to source the unit used on the Ural so I need to find a compatible diode.
It is a 12 volt system which can run up to around 14 volts when charging.
The dynstart generates 17amps max. The battery is a medium sized 45 amp- hour unit.
I have trawled diode supplier's sites but don't understand enough about how diode ratings etc. work to find a suitable one.
Can anyone advise me on a suitable diode rating/part number for this
application as i am a bit stuck now.
Sorry this is a bit long-winded but though a bit of background might be useful.
Any help/advise would be much appreciated.
I am retrofitting a dynostart (startermotor/generator) to a dumper engine that was previously hand-crank start.
It is a Hitachi unit commonly used on petrol golf carts and Russian Ural motorcycles!
The problem I have is that once the engine is running and charging begins, it is designed to send the charge current back along the same cable used for the starting current.
So having started the engine, once I release the starter button (de-energising the starter solenoid) the circuit is broken and no charge can be returned to the battery.
The golf cart uses a constant duty starter- solenoid to overcome this with a more complex control unit.
According to my research the Russian Ural 650, however, uses a 'high current silicone rectifier diode'across the switched/large solenoid terminals allowing current to return to the battery during charging but blocking it from trying to activate the starter motor.
This is where I am struggling and need your help. Sadly I cannot seem to source the unit used on the Ural so I need to find a compatible diode.
It is a 12 volt system which can run up to around 14 volts when charging.
The dynstart generates 17amps max. The battery is a medium sized 45 amp- hour unit.
I have trawled diode supplier's sites but don't understand enough about how diode ratings etc. work to find a suitable one.
Can anyone advise me on a suitable diode rating/part number for this
application as i am a bit stuck now.
Sorry this is a bit long-winded but though a bit of background might be useful.
Any help/advise would be much appreciated.
