what is armature reaction?explain in simple words?and what
is its infleunce on dc motor
Answer Posted / farha
Armature reaction for a dc generator:
Consists of 2 cases:1. when generator is operated without
load and 2. when generator is operated on load.
When generator is operated on no load only main flux(due to
poles) is produced.Now when load is applied,flux cuts
through the air gap and produces a counter flux due to
presence of armature.This flux caused by the presence of
armature distorts the main field flux,hence shifting the
magnetic neutral axis in the direction of rotation of the
generator.This causes heat loss.For a motor, the direction
of shifting of Magnetic Neutral axis is oposite to the
direction of rotation.
Since this loss occurs due to action of armature, it is
known as armature reaction.
Is This Answer Correct ? | 87 Yes | 13 No |
Post New Answer View All Answers
A car's starter motor draws a current of 100 A at 12,0 V when starting the engine. The mechanical power required to turn the engine is 960 W. At what rate is energy from the battery converted to non-mechanical forms of energy?
In 90 kva alternator that produce the output voltage is 115(p-n),200(p-p) at 1500 rpms means what ampere it produced ?
I Need standard operation procedure(SOP)for 500kva Oil type transformer oil filtration & Procedure for IR value checking.
Which motor will you choose which can operate in both lagging as well as leading power factors?
what are the ''pitting rings''and how cn they be controlled in a series generator
What are the material used for inductance coil?
What is the different between conventional MCC and intelligent MCC? Common controller or controller for each bucket
can we make a electric generator,which can not use any type of fuel,air,solar,gas,thermal,coal,petrol,etc and able to produce electrical energy (or self electricity generating generator)
How to calculate the input cable rating for 10kva ups (3phase input and single phase output and also 3phase output, battery rating 65Ah)provide the formula also.thnx
Which types of gate insttaled in static switch. Please give me answer.
Can any body tell me the different types of LT cables & their application.
which IS or IEC is used for earthing,breakdown voltage of transformer oil, hv/pd testing and all type of electrical testing
What is servo lock in CNC how they work and if any parameter for them in CNC machine
in 132kv substation CRT means
Why Stabilising Resistor used in REF circuit ?