I want to build a soft start circuit for a single phase induction motor.
The motor rating is 1 HP so a DOL start is far from ideal.
The no load current is 3 amps (measured) and the full load current is given as 5.7 amps on the rating plate.
Thoughts so far,
1). Series resistor shorted out by an SSR after a short time delay but where do I get a resistor that will tolerate 2 KW or so for 1/2 sec?
2). A simple automatic phase control circuit.
3). NTC series resistor but is there one that will survive the surges?
Phase control seems favourite.
Suggestions please for the way forward.
Thanks.
The motor rating is 1 HP so a DOL start is far from ideal.
The no load current is 3 amps (measured) and the full load current is given as 5.7 amps on the rating plate.
Thoughts so far,
1). Series resistor shorted out by an SSR after a short time delay but where do I get a resistor that will tolerate 2 KW or so for 1/2 sec?
2). A simple automatic phase control circuit.
3). NTC series resistor but is there one that will survive the surges?
Phase control seems favourite.
Suggestions please for the way forward.
Thanks.