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Unipolar/Bipolar Connections (2-Phase Motors) |
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Connections |
Resistance
(Ohms) |
Inductance
(mH) |
Current
(A) |
Voltage
(V) |
Holding Torque
(oz-in) |
Unipolar |
Same as Catalog |
Same as Catalog |
Same as Catalog |
Same as Catalog |
Same as Catalog |
Bipolar Series |
Catalog
X 2 |
Catalog
X 4 |
Catalog
X 0.707 |
Catalog
X 1.414 |
Catalog
X 1.414 |
Bipolar Half Coil |
Same as Catalog |
Same as Catalog |
Same as Catalog |
Same as Catalog |
Same as Catalog |
Bipolar Parallel |
Catalog
X 0.5 |
Same
as Catalog |
Catalog
X 1.414 |
Catalog
X 0.707 |
Catalog X 1.414 |
Customer'sDriver |
Motor
Choices |
What
to Do |
How
to Do It |
End Result |
Unipolar
(6
Leads) |
6 Lead
Motor |
Use
as is
(Unipolar) |
|
6 Leads |
8 Lead Motor |
Convert to
Unipolar |
Tie yellow
and orange together and use AND
Tie white and brown
together and use |
6 Leads |
Bipolar
(4
Leads) |
6 Lead
Motor |
Convert
to
Series |
Tape off yellow and white leads and don't use |
4 Leads |
Convert
to
Half
Coil |
Tape off black and red leads OR Tape off green and blue leads |
4 Leads |
8 Lead
Motor |
Convert
to
Series |
Connect
yellow and orange and tape off AND
Connect white and
brown and tape off |
4 Leads |
Convert to
Parallel |
Tie black
and orange together AND
Tie yellow and green together
AND
Tie red and brown together AND
Tie white and blue
together |
4 Leads |
Convert to
Half
Coil |
Tape off black,
yellow, red, and white OR
Tape off orange, green,
brown, and blue |
4 Leads |
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Unipolar and Bipolar Half
Coil, because we're using less turns, doesn't give
us great low speed torque, but because of the low
inductance, holds the torque out to high speeds.
Bipolar
Series uses the full coil so it gives very
good low speed torque. But because of the high
inductance, the torque drops off rapidly.
Bipolar
Parallel also uses the full coil so it gives
good low speed performance. And its low inductance
allows the torque to be held out to high speeds.
But remember, we must increase current by 40%
to get those advantages. |
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