Originally Posted by FredPaul
I was wanting to modify an inverter to operate at a slower frequency to get a motor started under load. Is there a cheap way to soft start an ac motor or a way to adjust the frequency of my inverter? I was thinking that a small resistor tied to the timing capacitor would do it but that seems too simple. Any thoughts are appreciated.
If you try to limit the start up current,
With a load on the motor,
this could cause motor to stall,
Not good for the motor.
But if the load is only light,
you might get away with it.
Use a lamp in series with the motor,
And a relay wired across the lamp,
The size of the filter cap in the coil supply
will dictate the time delay.
May be not legal.
So use care.