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machines

Hence

the

average voltage induced

in the

conductor

= Φ/-τττ-

2Pn

= 2ΡηΦ volts

On

the

armature there

are Z/c

conductors

in

series (see Examples

1

and

2).

Hence,

the

total

e.m.f. E

=

2Pn

Φ -2-

V

c

E

Ec

Transposing:

n = =

rev/s

2Ρ

φ^

2ΡΦΖ

C

Since 1 revolution

= 2π

radians

2TL£C

nfc

2ΡΦΖ

ΡΦΖ

rad/s

Example

4. The

wave wound armature

of a

six-pole

d.c.

generator

has 30

slots

and in

each slot there

are 8

conductors.

The flux

per