- Joined
- Dec 8, 2013
- Messages
- 2,651
OK here are some readings taken at 240 rpm under no load and stall conditions, all in V DC.
No Load Stall
Gen. Field 12.6 1 2.6
Arm. 33.8 30
Motor Field 189 189
Arm 26.7 26.7
Hope they shed more light for you than they do for me. Now I'll go study the wiring diagram some more.
Michael
The generator voltages are about as I expected: the load drops the output a bit. The motor armature voltages don't make sense. The notation in the drawing is peculiar but, knowing how a Ward Leonard works, I think I can follow it. In this mode the motor armature should be connected directly to the generator armature. You might see a few volts of drop due to dirty switch contacts and/or bad connections but the change from no-load to stall at the motor should be as large as or larger than that at the generator.