Induction Machine

It can easily be seen from the slip torque characteristics of an induction motor that, there is some finite torque when the slip s=1 i.e. speed is zero. This simply means that Induction Motor is a self-starting motor and begins to rotate on its own when connected to a 3 ...
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As the name of the test specifies, in Blocked Rotor Test, rotor of Induction Motor is blocked by external means so that it cannot rotate. The Blocked Rotor Test of Induction Motor is similar to the short circuit test of a transformer. As in Transformer short circuit test, we apply ...
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We have already discussed about staring methods of Single Phase Induction Motor. If you miss that please read here, 1) Revolving Field Theory of Single Phase Induction Motors 2) Starting Methods of Single Phase Induction Motors The schematic diagram of Capacitor Split Phase Motor is shown in figure below. Like ...
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Cogging phenomenon is observed in Squirrel Cage Induction Motor during starting for certain combination of Stator and Rotor Slots. In Cogging motor fails to start at all. For better understanding a view of Stator Core Laminations, Stator Core and Rotor of Squirrel Cage Induction Motor is shown in figure below.Squirrel ...
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For understanding Crawling, there are some points which are very important to know. Those points are as follows:Speed of Rotating magnetic flux = 2f/P, where f is frequency of Supply and P is the number of PolesHarmonic magnetic flux travel at a speed of 1/k time that of fundamental magnetic ...
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The basic difference is that an induction motor is an asynchronous machine whereas the other one, as the name suggests is a synchronous machine.Following are some important differences between a Induction Motor and a Synchronous Motor:Synchronous motors operate at synchronous speed (RPM=120f/p) while induction motors operate at less than synchronous ...
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As per the equivalent circuit representation, a three phase Induction Motor is generalized transformer but there are some differences between the Induction Motor and a Transformer, they are summarized below.The basic and most important difference is that even though the equivalent circuit of Induction Motor and Transformer is same rotor ...
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Please have a look at the below figures of Squirrel Cage Induction and Wound Rotor / Slip Ring Induction Motor.Squirrel Cage Induction Motor:Slip Ring / Wound Rotor Induction Motor: Sr. No. Squirrel Cage Induction Motor Slip Ring / Wound Rotor Induction Motor 1) 1. In Squirrel cage induction motors the ...
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A Squirrel Cage Induction Motor (SCIM) only has a cage rotor winding, whereas a synchronous machine has both a cage (damper) and a wound DC field winding as shown in figure below.Synchronous Motor with Damper Winding:Squirrel Cage Induction Motor:In both cases, and when using only the cage winding, both motors ...
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Direct-on-Line or DOL Starting is the simplest mode of starting of Induction Motor where the stator is directly connected to the mains supply as shown in figure below. The motor starts with its own characteristics. When it is switched on, the motor behaves like a transformer with its secondary, formed ...
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