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installing 12 to 24 volt converter

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i installed a cm200d into a magnet crane at a recycling plant. it was 24 volt so i had to use a 12 to 24 volt converter. the problem im having is that when you turn the key on the radio comes on fine but when you crank the machine to start the radio shuts off and does not come back on. you have to hit the power button to turn it on. then it works fine and shuts off when you turn the machine off. its only when you crank the machine to start. its like the voltage drops too low during crank for the radio to stay on. any ideas on how to get around this?
 

RFI-EMI-GUY

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I would suggest you are either getting a severe voltage drop to the inverter or there is a negative voltage spike due to starter motor inductance. Maybe both. You might try a high current blocking diode in series with the 24 volts and a super-capacitor rated at ~36Volts to store current during that period. The other solution is a storage battery at 24V after the diode. I would fix this before you damage the radio or inverter in case it is an inductive spike.
 

cavmedic

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Have you tried wiring up an ignition sense kit? You might be able to find 12v in the machine for another accy that’s lower current to trigger the input
 
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so if its a voltage drop and not starter motor inductance, how would i remedy that? my guess would be that any ignition source is going to have the same voltage drop.
 
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