Difference between Induction motor and Synchronous motor
In this article we are going to discuss about the difference between induction motor and synchronous motor . Both are an electrical motor but there are some difference between them.
Difference between Induction motor and Synchronous motor
Induction motor
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Synchronous motor
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1. Induction motor always operates at less than synchronous speed.
RPM = 120F/p – Slip
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Synchronous motor always operates at synchronous speed.
RPM = 120F/p
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2. In this type motor Slip is not being zero so its rotate always at less than synchronous speed
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In this type motor Slip is negligible so it always rotate at synchronous speed
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3. Induction motors don’t need DC excitation to be supplied to the rotor.
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In synchronous motor required DC excitation for rotor.
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4. In induction motor don’t required slip ring and brushes for rotor excitation
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In synchronous motor required slip ring and brushes to supplied the rotor excitation
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5. In Induction motor does not required additional equipment for get synchronous speed
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In synchronous motor most additional equipment required to get synchronous speed
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6. Induction motor is generally less efficient than synchronous motor
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It is generally more efficient than induction motor
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7. Its rotor required DC power
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Its rotor does not required DC power
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8. Induction motor is less costly than synchronous motor
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synchronous motor is more costly than induction motor
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9. It is singly excited machine , for excitation its stator connect from AC source
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It is doubly excited machine
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10. It has its own self-starting torque
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It has not its self-starting torque
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11. Induction motor always run at lagging power factor
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Synchronous motor does not always run at lagging power factor. it run at lagging , leading and unity power factor according to excitation.
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12. In Induction motor always
Running speed < synchronous speed
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In synchronous motor always
Running speed = synchronous speed
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13. Induction motor is not synchronous motor
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But synchronous motor is an induction motor .it is main difference between induction motor and synchronous motor
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These are some difference between induction motor and synchronous motor. If you find incorrect above please comment in below.