My Dynamotor

[Rich]

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.

 

[Rich]

"Rich" <notty@emailo.com> wrote in message
news:6uonp9FgftuaU1@mid.individual.net...

I have a Delco Remy dynamotor. It was made for tanks. Was new in 1972.

Picture:

http://homepage.ntlworld.com/richards_internet/TEMPORARY/DYNAMOTOR.html

 

[christofire]

"Rich" <notty@emailo.com> wrote in message
news:6upa4oFgfousU1@mid.individual.net...

"Rich" <notty@emailo.com> wrote in message
news:6uonp9FgftuaU1@mid.individual.net...
I have a Delco Remy dynamotor. It was made for tanks. Was new in 1972.

Picture:

http://homepage.ntlworld.com/richards_internet/TEMPORARY/DYNAMOTOR.html

Although it won't help you much in your quest, you may be interested to know
that the things to which you're referring as 'armatures' are actually
commutators. The armature is the moving part, of which there is one.

Maybe the dual-motor principle is something to do with redundancy, like
feeding each from a different battery, but that seems unlikely because the
dynamotor itself would become a bottleneck.

Chris

 

[Jamie]

christofire wrote:

"Rich" <notty@emailo.com> wrote in message
news:6upa4oFgfousU1@mid.individual.net...

"Rich" <notty@emailo.com> wrote in message
news:6uonp9FgftuaU1@mid.individual.net...

I have a Delco Remy dynamotor. It was made for tanks. Was new in 1972.

Picture:

http://homepage.ntlworld.com/richards_internet/TEMPORARY/DYNAMOTOR.html



Although it won't help you much in your quest, you may be interested to know
that the things to which you're referring as 'armatures' are actually
commutators. The armature is the moving part, of which there is one.

Maybe the dual-motor principle is something to do with redundancy, like
feeding each from a different battery, but that seems unlikely because the
dynamotor itself would become a bottleneck.

Chris


Or one of them are used as a tach generator to regulate RPM's

http://webpages.charter.net/jamie_5"

 

[Rich]

"christofire" <christofire@btinternet.com> wrote in message
news:18qdnUJK0fgn-hXUnZ2dnUVZ8jSdnZ2d@bt.com...

"Rich" <notty@emailo.com> wrote in message
news:6upa4oFgfousU1@mid.individual.net...

"Rich" <notty@emailo.com> wrote in message
news:6uonp9FgftuaU1@mid.individual.net...
I have a Delco Remy dynamotor. It was made for tanks. Was new in 1972.

Picture:

http://homepage.ntlworld.com/richards_internet/TEMPORARY/DYNAMOTOR.html


Although it won't help you much in your quest, you may be interested to
know that the things to which you're referring as 'armatures' are actually
commutators. The armature is the moving part, of which there is one.

Maybe the dual-motor principle is something to do with redundancy, like
feeding each from a different battery, but that seems unlikely because the
dynamotor itself would become a bottleneck.

Chris

Yes, I know they are commutators. I was thinking in terms of windings and
thought armatures was better to use. :c)

I think what it was that they built flexibility into the design. If this was
for a tank it would run off 24v and armatures 1 and 4 would be in series.
When it was sold off as surplus it was sold as running off 12v, so the
wiring instructions then will have shown armature 1 and 4 in parallel. I
think that is the answer to the wiring connections.