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In induction motors no seprate source is required to start the motor,and motor itself induces emf as the word induction clearly reflects it starting principle while in case of synchronous motors ,motor is synchronised with an external source of emf.
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∙ 12y ago
Wiki User
∙ 9y agoA synchronous motor is having a rotor fed with a dc supply and stator with a 3 phase ac supply.The rotor acts as a permanent magnet since dc current flows through the rotor windings. The stator wdg fed with a 3 ph ac supply produces a revolving magnetic field which is in the vicinity of dc magnetic field of rotor. Now rotor experiences a nett torque due to the interaction of two fields and starts rotating , spped increases till the rotor speed reaches synchronous speed.
Where as in an induction motor, the rotor especially a squirrel cage rotor is end shorted copper conductors. The stator is fed a 3ph ac supply. which produces a revolving magnetic field. the rotor conductor in the vicinity of stator field induces a current in rotor which inturn produces a magnetic field. Now the rotor experiences a starting torque and gains speed. The rotor speed will be less than synchronous speed.
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What is the difference between synchronous motor vs induction motor and which one is better?
The big difference is that the synchronous motor's rotor can have a variable current applied to it through its field slip rings. Both types of motors have their own advantages. With a synchronous motor in the system, the systems power factor can be regulated.
Type of dc motor used by fan?
Synchronous motor or induction motor
If a three phase induction motor runs at a speed greater than synchronous speed?
When an induction motor is pushed over synchronous speed it will become a generator and will deliver power back to the utility.
Speed of the stator field of an Induction motor is?
synchronous speed
Does a induction motor need excitation?
The induction motor is the special kind of motor which runs below and above the synchronous speed. which the synchronous motor runs nearly equal the synchronous speed. The operation of synchronous motor runs with dc field excited hence separate dc field current is given to the field circuit. where as the induction motor the field and main field is drawn from the same supply hence no excitation is required. But due to this separate starting mechanism has to be required in case of the single phase induction motor.
What is a slip in electricity?
it is the difference between the synchronous and asynchronous speed of a induction motor
Difference between induction motor and induction generator?
in case of induction motor the rotor speed is less than synchronous speed giving positive slip but in case of generator the rptor speed is greater than synchronous speed giving negative slip.......
What is the difference between synchronous motor vs induction motor and which one is better?
The big difference is that the synchronous motor's rotor can have a variable current applied to it through its field slip rings. Both types of motors have their own advantages. With a synchronous motor in the system, the systems power factor can be regulated.
What is difference between synchronous motor and synchronous condenser?
a synchronous condenser is over excited synchronous motor under no load
Similarity of induction motor and synchronous motor?
motor cyc
Why 3 phase induction motor never atteined sinkronas speed?
Induction motors run at sub synchronous speeds because the slip (difference between synchronous and actual speed) causes, or controls the electric field strength in the motor. As more load is put on the motor, the motor's speed decreases, increasing slip, and increasing the electric field strength.
Type of dc motor used by fan?
Synchronous motor or induction motor
What is the similarity between an AC induction motor and an AC synchronous motor?
Only Stator winding is similar in both the cases.
Why is the speed of synchronous motor is more then induction motor?
Synchronous motors run at synchronous speed. An induction motor that has the same number of poles must run at a sub-synchronous speed to create a second magnetic field (a field that is at a different phase angle) to generate torque.
If a three phase induction motor runs at a speed greater than synchronous speed?
When an induction motor is pushed over synchronous speed it will become a generator and will deliver power back to the utility.
Why doesn't an induction motor run at synchronous speed?
siyudad
Speed of the stator field of an Induction motor is?
synchronous speed
