jack mcleod
New Member
request for slow start schematic (that inter. home hobbiest can build) for
a 12 V DC boat water pump. running draw 3-5 A.
a 12 V DC boat water pump. running draw 3-5 A.
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jack mcleod said:A 400 watt inverter (12 V DC to 120V AC, rated 300 watts continuous) runs a video & TV until someone gets a glass of water. The tap(houseboat) turns on a 12 V water pump... on occassions the TV flickers then continues..But usually the inverter shuts off. Yes I know the obvious non electronic answers. Source = two 12V deep cycle bats. in parallel. Will try the 1 ohm resistor shortly. Considering relay fron AC side of inverter to Sw pump source on to motor battery while inverter is running.
My guess is it takes 1-3 sec. for the pump to get up to speed. Considered large caps to expensive. Still interested in a slow start circuit. Still open
to suggestions. THANKS GUYS. Jack Mcleod.
Using caps is a good idea..jack mcleod said:A 400 watt inverter (12 V DC to 120V AC, rated 300 watts continuous) runs a video & TV until someone gets a glass of water. The tap(houseboat) turns on a 12 V water pump... on occassions the TV flickers then continues..But usually the inverter shuts off. Yes I know the obvious non electronic answers. Source = two 12V deep cycle bats. in parallel. Will try the 1 ohm resistor shortly. Considering relay fron AC side of inverter to Sw pump source on to motor battery while inverter is running.
My guess is it takes 1-3 sec. for the pump to get up to speed. Considered large caps to expensive. Still interested in a slow start circuit. Still open
to suggestions. THANKS GUYS. Jack Mcleod.
audioguru said:Hi Jack,
I think the symptom is caused by a wiring problem.
It sounds like the inverter and pump are connected together then have a long run on thin wires to the batteries. The inverter needs very heavy wires by itself to run to the batteries.
It doesn't matter if the pump runs a little slower on its existing wire.Russlk said:If you run the water pump direct to the battery, it should solve the problem. Heavier wire won't hurt either.