240V 50hz 88W sewing motor, want ~50W with max torque as belt drive genset starter motor. PSU: 75W 12v/240v inverter. power resistive regulation unlikely. KISS pls.
I don't see any similarities. different poster. The thread you linked is a guy wanting to use a brushless generator head as a starting motor. This guy wants to use a sewing machine motor at power levels less than my back porch light.Looks like a new twist an older thread. Some may like to review this thread for context: https://forum.allaboutcircuits.com/...t-separate-starter-motor.170317/#post-1518885
Exactly how if this is a belt drive, will the "starter' disconnect when the generator starts?240V 50hz 88W sewing motor, want ~50W with max torque as belt drive genset starter motor. PSU: 75W 12v/240v inverter. power resistive regulation unlikely. KISS pls.
I don't think it needs to be disconnected. Once the engine is running (started by means other than this tiny motor) the engine would not even notice it still coupled.Exactly how if this is a belt drive, will the "starter' disconnect when the generator starts?
But the bronze bushings in the "starter motor" sure would. Think of how much faster the gearing/pulley ratio would make it turn.I don't think it needs to be disconnected. Once the engine is running (started by means other than this tiny motor) the engine would not even notice it still coupled.
Does nobody else want to acknowledge that this motor is undersized by a factor of 50+? It wouldn't start even the smallest RC model toy engines.
of course, I could bridge rectify and use a dc current limiter, [0.44A p max] which might be the easiest way? not quite sure how to do that tho'.thx, that's usefull. afair it's 66cc. it all has to be self contained, and require min strength to carry/operate. genset with fuel is 8kg, my limit will be abt 10kg. Not sure of local cost of model starter unit, but will look into it. need it to be short too. model starters too weak, I'm told.
You said in the other thread the gen was hard to pull start. If you are capable of carrying and moving around 8 to 10kg, why can't you pull the starter cord? I'm doubting it would take 1/2 of that amount of weight to pull start the motor.require min strength to carry/operate. genset with fuel is 8kg, my limit will be abt 10kg.
can lift dead mass, but not pull starter cord/hold genset down. without much pain. very weak. can just hold 1kg with arm extended for few sec.You said in the other thread the gen was hard to pull start. If you are capable of carrying and moving around 8 to 10kg, why can't you pull the starter cord? I'm doubting it would take 1/2 of that amount of weight to pull start the motor.
Given the reduction ratio needed for a motor that small to turn over any engine to start a generator, the failure will happen when the engine starts and that little motor is driven way faster than it can handle. So certainly the motor would need a means to de-clutch to the engine. That should be obvious.I don't think it needs to be disconnected. Once the engine is running (started by means other than this tiny motor) the engine would not even notice it still coupled.
Does nobody else want to acknowledge that this motor is undersized by a factor of 50+? It wouldn't start even the smallest RC model toy engines.
inverter 12v/240v 75w. =0.3A rms max. =0.42A peak. \oad 84w [0.35A rms] motor, hard start. dc resistance =can lift dead mass, but not pull starter cord/hold genset down. without much pain. very weak. can just hold 1kg with arm extended for few sec.
by Jake Hertz
by Jake Hertz
by Jake Hertz