Question

a
Supply has
back Emp
Connected to
A Brushless
Motor
460 v
has
armature resistance
resistance of 0.15 ohm
calculate (a) the value of back emf
when
armature current is 120A
b) the value
of Armature
current when back emf is
4.47v.​

Answer 1

Answer:

no idea

Explanation:

i am confuse..............

Answer 2

Answer:

the back emf is given as

E = V - IR

here

V = 460 volts

I = 120 amps

R = 0.15 ohms

so,

E = 460 - (120 x 0.15)

thus,

E = 442 volts

..

the armature current is given as

I = (V - E) / R

here

E = 4.47volts

or

I = (460 - 4.47) / 0.15

thus,

I = 3036.9 amps

Explanation:

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