Interested to Buy Any Domain ? << Click Here >> for more details...
what is the MNA in case of d.c. machin?
whaty is the importance of it?
hoe it affect the brush position?
- 2 Answers
- 7324 Views
- TATA, I also Faced
- E-Mail Answers
Answer Posted / shekar
MNA stands for Magnetic nuetral axis. It is an imaginary
line perpendicular to magnetic lines and passing exactly at
the centre of magnetic field. The emf induced at MNA will
be zero as the conductors will not cut any flux at MNA. At
MNA the conductors will be parallel to magnetic lines.
Hence brushes are located at MNA to collect current. During
armature reaction the MNA shifts in the direction of
rotation of generator. So the brushes should be shifted to
new position of MNA to avoid sparking.
| Is This Answer Correct ? | 10 Yes | 0 No |
Post New Answer View All Answers
Block diagram of Power line communication?
what is the formula to calculate voltage drop/loss on 66KV Transmission Line?
Does outdoor isolator loose connection cause short circuit current in that circuit? if yes then how ??
Why earthing is necessary for any equipment?
Approach of a cooling tower is the difference between temperatures of what factors?
how to select the mpcbs and contactor for 3 phase 30 hp star delta motors.for plc control.and tell me the calaculation for future use.
bsec exam syllabus (mis)
3Cx240 & 3Cx300 sqmm Al. cable from lv side. What is the calculation for this cable??
what is the voltage regulation for unity and zero power factor?
how we can calculate power factor in single phase & three phase ?thank u
wish of these transformer uses oil?
What is difference between start imitation and start interlock for 3 phase motor protection ?
How line capacitance & line inductance varies with increase in height tower.
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?
what is the difference between unarmoured & Flexible cable? How to identified?
