JLG 3246ES Service Manual - Manual (Page 40)

SECTION 3 - CHASSIS & SCISSOR ARMS
3-4 – JLG Lift – 3121166
Figure 3-3. Traction Control Circuit - Sevcon Power Module
-B
+B
Right
Armature
24V
Line Contactor
Power Module
M1
M2
F1
F2
Left
Armature
Left Field Winding
Right Field Winding
Shunt
Armature
Switch
Field
Switches
1 2
4 3
Figure 3-4. Traction Control Circuit - ZAPI Power Module
+
24V
+ + +
Line Contactor
Right Field Winding
Left Field Winding
Power Module
Left
Armature
Right
Armature
+ +
BF1 BF2
B +B T
F1
F2
Field
MOSFETS
Armature
MOSFET
Shunt