Why motor initial starting current is high?
- 9 Answers
- 59476 Views
- Pennar, I also Faced
- E-Mail Answers
Answer Posted / yusuf
f'=sf
f'=rotor frequency
s=slip(ns-n)
f=stator frequency
During starting slip will equal to 1 due to rorot at rest that's why rotor runs same as stator frequency during starting.when rotor runs slip will reduced & motor current reduced to normal
| Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
I have a small system with two motors that are running on 380 vac, 60 hz. These motors are expensive and I usally get them from Brazil. I am adding another motor to the system, but I want to purchase a 480 vac, 60 hz motor to use. It will be on a VFD that is rated fro 380 thru 480. Is this posible and will I have to use a larger motor and derate it?
Name two low frequency oscillators?
Why water bubbles when D.C. Current is passed through it? Why not when A.C. Current is passed?
What will be the voltage regulation of a full load and 0.80 power factor lagging load transformer when a two winding single phase transformer has a voltage regulation of 4.5% at full load and unity power factor?
How line capacitance & line inductance varies with increase in height tower.
What is a copper loss or i2r loss pc?
What is the effect on power factor, shown by a trivector meter; incase of reverse phase sequence. If the power factor of a system is lag what meter will show in case of reverse phase sequence connected to the meter. and What in case of lead.
is the value of inductance depends upon the evalue of thitha in doubly excited machine?
what is parellel power factor correction?
What is UPS and How do you maintain the UPS Maintenance? Brief Description on UPS maintenance.
how to enter inverter parameter? without manaual?
How colour picturetube works & how many year it will works.
Type of motor stater detail and working detail
Why phase sequence must be same in any ht motor or generator circuit?if phase sequence doesn't same whatever will be affect on circuit?
what is the diference between the 4pole & 6pole DC Motors & what is advantage 6pole over the 4pole ?
