why dc series motors never start without some load,
and what will happen if starting with out load..
Answer Posted / sabyasachi mishra
If a dc series motor will start with load then its rotor
will rotate at enermous speed .
As we know speed(N) is directly propertional to back emf
(Eb) of motor and inversely propertional to flux generated.
So initially the motor will drawn less or no
current,hence the speed will reach at a dangerious limit.
Hence a dc series motor never started without load.
| Is This Answer Correct ? | 9 Yes | 0 No |
Post New Answer View All Answers
If the rated speed of a d.c. Shunt motor is1440 r.p.m, which method of speed control would you suggested to obtain a speed of 1500 r.p.m?
Define average demand?
what is quality factor in series resonance circuit and calculate the factor of voltage magnification? how it happens?
do any one help me to get "C" license,, i have doubts ,,, if mediators ter pls call me,, my no is 8056640042
What will be the fault current of any system when its generation is 10% of BASE generation( FUll Load )?Will is 10% or the same as full base calculation?
Why do we use center tap transformer that used with portable tools
What is the formula for calculating no-load current?
Why field rheostat is kept in minimum position while armature rheostat at maximum position?
why tertiary winding is used in transformer with diagram?
why any centrifugal blower draw more current in starting. consider id fan and fd fan?
What is the formula formula for Busbar sizing and what are the things to be consider for Busbar Calculation?
What is the Surge for 1.1 Phase Induction Motor(For Eg.1Hp) 2.3 Phase Induction Motor(For Eg.1Hp) 3.AirConditioner(For Eg 1Ton) 4.Refrigerator(For Eg 180Ltr or 160kW) 5.Induction Cooker 4. Ceiling Fan
Explain the term parallel path in dc machin ?
What is making & breaking current ???
how to select battery for 15 KVA UPS with formula