Interested to Buy Any Domain ? << Click Here >> for more details...
why the AC or DC motor takes high starting current?
- 2 Answers
- 4690 Views
- I also Faced
- E-Mail Answers
Answer Posted / harshid agrawal
because at the starts dc motor do not have the back emf and due to that applied voltage is not oppose by back emf and winding have small amount of resistance so according to ohm's law current increse to 50-60% of it's rated current.
and in case of ac motor as the at the start there is no any rotation of the rotor wrt stator winding and the emf induced in the rotor winding depens upon the flux link with it and it's relative speed as the we apply full rated voltage at first it cause max flux link with rotor as it remain stationary and max emf induce in rotor winding as rotor winding is short circuited in induction motor it cause high flow of current in rotor .
that's bot ac and dc takes high current @ starts
| Is This Answer Correct ? | 6 Yes | 2 No |
Post New Answer View All Answers
difference between Ac and Dc mcb ????
what is frequency response?
In siemens PLC, why do we want to move the data ?
How can we calculate strength of copper hich is supplying electric power to heater and in it hold the heater also and what r all types of forces which is acting on it...
what is difference between elr and R eartl realy.
How many types of circuit loads are there in a common electrical circuit?
why the field winding in dc motor is not short circuited eventhough dc supply is applied across the winding
The sodium vapor lamp is not glows when it is connected a distance of 5 meters above from gearbox, why ?
What are the disadvantages of hydropower?
Can anybody post questions asked in Engineers India Limited Interview? Thanks in advance.
why do we not use equivalent voltage source in negative sequence equivalent ckt.
what is the purpose of silicon dropper used in battery charger?
how to test reverse power trip?
what is the difference between Power and Distribution transformers ?
what is LSR?
