R
Rich
Guest
I have a Delco Remy dynamotor. It was made for tanks. Was new in 1972.
There are two sets of pairs of brushes at both ends.
I can see that one pair of brushes at one end outputs (Lo) voltage (i.e
240v). Another pair of brushes at the other end outputs (Hi) voltage (400v
or something like that). So, that's the generator part.
Now, that still leaves one pair of brushes on either end. These are
associated with the motor part.
It's strange to me, but I can see that it looks as if there are two motor
armature windings on the same shaft. Each motor armature seems to be
connected as a shunt motor but with a series winding as well. So, two
compound motors are connected in parallel that drives the shaft around. The
polarity of the brushes for each motor are revered, i.e
Lo Hi
_+_ _ _ _ _ _-_
---------------------------------- Shaft
_-_ _ _ _ _ _+_
Lo Hi
_ _ = brush
I'm just curious if anyone knows about this arrangement. Can this dynamotor
be driven on one motor armature only? Or are both motor armatures supposed
to be conected?
I think when drawing out the schematic I'll have to have two motor armature
symbols and two generator armature symbols, plus the field windings.
There are two sets of pairs of brushes at both ends.
I can see that one pair of brushes at one end outputs (Lo) voltage (i.e
240v). Another pair of brushes at the other end outputs (Hi) voltage (400v
or something like that). So, that's the generator part.
Now, that still leaves one pair of brushes on either end. These are
associated with the motor part.
It's strange to me, but I can see that it looks as if there are two motor
armature windings on the same shaft. Each motor armature seems to be
connected as a shunt motor but with a series winding as well. So, two
compound motors are connected in parallel that drives the shaft around. The
polarity of the brushes for each motor are revered, i.e
Lo Hi
_+_ _ _ _ _ _-_
---------------------------------- Shaft
_-_ _ _ _ _ _+_
Lo Hi
_ _ = brush
I'm just curious if anyone knows about this arrangement. Can this dynamotor
be driven on one motor armature only? Or are both motor armatures supposed
to be conected?
I think when drawing out the schematic I'll have to have two motor armature
symbols and two generator armature symbols, plus the field windings.