a single phase motor must have at least 4 poles
one set is connected to the line
the other is connected in series thru a capacitor or inductor to shift phase and set up a rotating magnetic field
the rotor usually has a squirrel cage that will start turning
the slip rings can have different purposes depending on how the rotor is wound
if the highest rpm of the motor is a multiple of the line frequency 3600RPM for 60Hz 2 pole you apply dc to the winding to make it synchronous.
if the hi speed of the motor is 3470RPM the squirrel cage is weak
and you must short the rings to get up to the high speed
there is beauty in this in that if you vary the resistance from short to open it will be a variable speed motor
capacitive start motors start by themselves however a normal single phase induction motor requires a starter motor to 'kick-start' the motor into action.
The single phase induction motors are made self starting by providing an additional flux by some additional means. Now depending upon these additional means the single phase induction motors are classified as: 1.Split phase induction motor. 2.Capacitor start inductor motor. 3.Capacitor start capacitor run induction motor. 4. Shaded pole induction motor.
Single phase induction motor ( usually capacitor- start type)
zma da ghan mata sa razeEven if I do not understand the language used above I still believe that the answe above is very irrelevant, to say the least.Answer:1. Resistance start single phase motor2. Capacitor start single phase motor3. Capacitor start and run single phase motor4. Capacitor start capacitor run single phase motor
to start the motor and give more current to motor to run
A single phase induction motor is mainly used in fans.It is capacitor start capacitor run induction motor.In three phase induction motor squirrel cage induction motor is mainly used in elevators,lifts,cranes.slip ring induction motor is mainly used in electrically driven ships.
Single phase induction motor ( usually capacitor- start type)
No, commutator motors as used in vaccum cleaners for example do not use a starting winding. Single-phase induction motors need a starting winding without which they will start in either direction if given an initial twist.
This question doesn't really make any sense - any of the two phase? A three phase induction motor requires 3 phases to start - if a single phase is lost while the motor is already running then yes the motor will continue to run. A three phase motor will not start if it is missing a phase.
fan is a capacitor start capacitor run single phase induction motor. since single phase induction motors are not self starters, caused by discontinuty in stator mmf. so to iniate rotation single phase supply is splitted 90 degree apart by a capacitor to convert it to a 2 phase motor, which produces a continued synchronously revolving mmf in stator to start the motor. cool !!
Three Phase Induction Motor is self starting motor so you can start it by conneting to power lines directly if the power line capacity is sufficient.
230V/1Ph/50Hz 1HP (0.75 kW)Motor Capacitor start induction motor ( single phase)