The Split Ring Commutator !
!
SPH3U Worksheet
Name ________________________________
and the DC Motor!
!
For each of the following diagrams (if appropriate), indicate
the direction (up or down) of the electromagnetive force on
each side of the armature (coil):
Date ___________________________
Insulation segment
Conducting ring
segment, Y
Conducting ring
segment, X
Armature
①
B
C
S
Carbon Brush
Insulation segment
N
Split Ring Commutator
A
D
Spring
X
Y
+
Y
X
②
C
B
C
S
N
D
B
A
Y
③
-
+
X
D
S
N
Y
A
+
X
C
④
B
S
N
D
Y
A
⑤
+
C
B
X
S
N
D
A
+
X
Y
DC Motor With Field Windings
On the diagram below, indicate:
a)! the direction of current (electron flow) through each branch of the circuit.
b)! the polarity (N and S poles) of each of the two electromagnets.
c)! the direction of the electromagnetive force (up or down) on each side of the armature.
Armature
Electromagnet