Why machines are avoided to work is saturation region of B-
H curve?
Answer Posted / nithi
good answer.
High magnetising current leads to poor power factor & the
machine draws more current ,which increases losses (core
losses as well as copper losses) ultimately the system
insulation break down -total machine failure.
| Is This Answer Correct ? | 5 Yes | 0 No |
Post New Answer View All Answers
to vary valtage from 0 - max a variac is necessary . so how to design for high power applications nearly about 200KW power
need to make a report. Need to choose a 3phase induction motor. Load conditions motor will operate in : Maximum Load: 30 Kw Speed: 2950 rpm Ambient temp: 20 cent Supply voltage: 440V Frequency: 50Hz need to look for the safety factor when choosing the motor, went through catalouge found a few, but dont know how to choose the safety factor allowing an extra load something above 30 KW to avoid any harm.
TELL ME WHAT IS INDUCTOR AND CAPACITOR WHAT IS IT BASIC OPERATION ANDFUNCTION?
Consider three heater bank connected in 3 phase star with neutral.Each heater bank connected in each phase.So each phase get 230 volts supply.my question is,during balance condition, current flow in neutral or Not
explain me the relation between torque, frequency,speed,voltage and current in the 3 phase induction motor?
why do we not use equivalent voltage source in negative sequence equivalent ckt.
why and how voltage sharing in transformer, during magnetic balance test ?
Explain different types of d.c motors? Give their applications
why the neutral line is not giving shock to us if we touch it ?
When lag/lead/lag-lead compensation is employed?
why are the maintaine power factor and how can this control and this is how work.
what does vector group Dyn11 tell us? also tell me how will u differentiate between phase lead and phase lag thru this vector group
I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?
I have a drawing of a wound rotor induction motor for a crane. This crane motor has 5 forward speeds & 5 reverse speed implemented of course with different amount of resistance for each speed setting selected. What has got me scratching around is the fact that 8 of the 10 speed selections switch in uneven (unbalanced) amounts of resistances on each of the 3 connections to the motor's rotor.Can this be possible? I would have assumed this would produce unbalanced rotor currents and therefore vibration in the motor. I would greatly appreciate anyone's comments on this. Many thanks, Confused.
The synchronous machine excitation system explain