Why syn. generators r used for the production of electricity? Last Answer : synchronous machines have capability to work on different power factor (or say different imaginary POW varying the field emf. Hence syn. generators r used for the production of electricity....
What are Interpoles used for? Last Answer : As the polarity of Interpoles is the same as that of the main pole ahead, they induce an emf in the coil (under commutation) which helps the reversal of current. Another function is to neutralize the cross magnetizing effect of armature reaction...
What is the standard direction of rotation of the DC generators? Last Answer : Clockwise when viewed from the end opposite to the driven end...
Why do we use the starter for a DC motor? Last Answer : Large DC motors with field windings instead of permanent magnets have a very heavy load when starting. To prevent fuses from blowing, a series of small resistors are sequentially switched in series with the ... current. When the motor reaches its running speed, the starter' is out of the circuit...
Why Delta Star Transformers are used for Lighting Loads? Last Answer : For lighting loads, neutral conductor is must and hence the secondary must be star winding and this lighting load is always unbalanced in all three phases. To minimize the current unbalance in the primary we use delta winding in the primary. So delta / star transformer is used for lighting loads....
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