how to control dc motor?

1916

what are the advantages and disadvantages of oil filled cables over XLPE cables

19534

difference between crane drive and line drive.

1908

If Neutral Grounding Resistor (GR) failed/shorted. Is it repairable.

1633

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?

1978

what is the voltage regulation for unity and zero power factor?

2316

What is notching in dc machine?

1998

How we can change the direction of rotation of Induction motor? Prove it using graphical

2179

Differentiate between kirchhoff’s first law and kirchhoff’s second law?

1066

An 8 pole, 50 Hz, 3-phase IM is loaded to a poing where pull out torque will occur. The rotor resistance per phase is 0.3 ohm and motor stalls at 650 rpm. The rotor reactance at stand still is A 2 ohm B 1.25 ohm C 3.15 ohm D 2.25 ohm

2285

Approach of a cooling tower is the difference between temperatures of what factors?

1144

Why line VTG = √3 phase VTG in star? How?

1619

In synchronous motor, how the field current is related to armature current..i know its inversely proportional..but concept wise...i was nt clear....pls help me...

2045

What are the types of feedback oscillators?

1296

What is Tachometer used to measure?

1251