is the difference, that wound has "slip" and synchronis does not have "slip"?
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** Three rotor types for AC motors.
1. Squirrel Cage. Cast aluminum bars in laminated rotor core.
. Most common ac 1Ø & 3Ø induction motors. Starting direct-on-line, or Star Delta.
2. Wound. Rotor wound using windings similar to those on stator. Star connected,
. and brought out to external starting resistors via three slip rings. A resistor in series
. with each winding limits starting current. Resistances reduced to 0Ω at run speed.
. Used for 3Ø induction motors.
3. Synchronous. Uses magnetised rotor, no electrical conductors on rotor.
. Suitable only for small, very low torque, light weight rotor. 1Ø induction motors.
. So limited, as rotor must get up to sync speed in 1 cycle. 20ms for 50Hz.
. Best application for ac mains clocks and timers, as controlled frequency sets timing.
Squirrel Cage, and Wound rotor motors have a few % slip.
Synchronous, as the name implies, has no slip.
Clarification of any point will be provided, if requested.
1. Squirrel Cage. Cast aluminum bars in laminated rotor core.
. Most common ac 1Ø & 3Ø induction motors. Starting direct-on-line, or Star Delta.
2. Wound. Rotor wound using windings similar to those on stator. Star connected,
. and brought out to external starting resistors via three slip rings. A resistor in series
. with each winding limits starting current. Resistances reduced to 0Ω at run speed.
. Used for 3Ø induction motors.
3. Synchronous. Uses magnetised rotor, no electrical conductors on rotor.
. Suitable only for small, very low torque, light weight rotor. 1Ø induction motors.
. So limited, as rotor must get up to sync speed in 1 cycle. 20ms for 50Hz.
. Best application for ac mains clocks and timers, as controlled frequency sets timing.
Squirrel Cage, and Wound rotor motors have a few % slip.
Synchronous, as the name implies, has no slip.
Clarification of any point will be provided, if requested.