Re: Unipolar/Bipolar Parallel/Series?!?!?

mariss92705@... wrote:

<8-wire motor. The same as a 4 wire motor except the windings are
center-tapped and brought out as seperate wires for the center tap
instead of being internally connected.>

The performance in parallel is only 2% better in parallel compared to
half-winding connection on a 6-wire motor. The series connection is
exactly identical to full winding performance on a 6-wire motor.>

Hi Mariss,

Will the diagrams below describe what you are saying, the second
diagram (8 wires) getting 2% better performance despite having
current flowing in both coils as compared with current flowing only
in 1 coil in the first (6 wire) diagram?

And the third diagram (8 wires, full winding) should carry only 0.5
unipolar current rating? And current rating printed on 6-wires
stepper motors are alway unipolar current rating?


Six wire - Half winding
_______________________

____ <- I (unipolar current rating)
(
)
(____ --> I

N
(rotor)
S
____
(
)
(____


Eight wire - parallel
_____________________

____ <- I ( ???? current rating)
(
)
(____ --> I

N
(rotor) 2% better performance
S
____ <-- I
(
)
(____ --> I


Six wire - Full winding
_______________________

____ <- o.5I (unipolar current rating)
(
)
(_________
|
N | ?
(rotor) | ____ better performance
S |
_________|
(
)
(____ --> 0.5I