SPLIT PHASE START MOTOR
SPLIT PHASE START MOTOR
(OP)
Can I eliminate the centrifugal start switch ( which is broken, cannot find replacement parts) on a 1/2HP motor, with a solid state device such as a Supco R041?
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RE: SPLIT PHASE START MOTOR
JRaef.com
Eng-Tips: Help for your job, not for your homework Read FAQ731-376
RE: SPLIT PHASE START MOTOR
RE: SPLIT PHASE START MOTOR
RE: SPLIT PHASE START MOTOR
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: SPLIT PHASE START MOTOR
In a drier the centrifugal switch is commonly double throw.
The normaly open contacts turn off the heat if the motor stops and are also used to seal in the motor control circuit.
This arrangement seems to be unique to motors on clothes driers.
Respectfully
RE: SPLIT PHASE START MOTOR
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: SPLIT PHASE START MOTOR
RE: SPLIT PHASE START MOTOR
Some of the solid state motor starting relays on the market can self adjust for a particular size motor, partiularly the ones that can add a starting capacitor. A so called hard start kit converts a permanent split capacitor refrigeration compressor to capacitor start capacitor run and uses the voltage across the start winding rather than the current through the run winding.
The classic split phase starting relay was made by Texas Instruments and had the coil in the run winding and a normally open contact for the start winding. These were gravity sensitive and used gravity to open the contact. To get a relay that would work for a goofy size refrigerator motor that was made in Italy I had to get a smaller size relay, unwind all of the winding turns ( 70 ) and then rewind on the number of turns ( 60 ) that would get this motor to work.