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#Post#: 7--------------------------------------------------
Unipolar Stepper Motor and Bipolar Stepper Motor
DIR By: AlfredoBuenviaje
Date: August 8, 2016, 8:28 pm
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What is the difference between the two?
#Post#: 16--------------------------------------------------
Re: Unipolar Stepper Motor and Bipolar Stepper Motor
DIR By: NorHaynieBongcarawan
Date: August 14, 2016, 12:24 am
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Unipolar Stepper Motors
The unipolar stepper motor operates with one winding with a
center tap per phase. Each section of the winding is switched on
for each direction of the magnetic field.
Bipolar stepper motor
There is a single winding per phase.
#Post#: 21--------------------------------------------------
Re: Unipolar Stepper Motor and Bipolar Stepper Motor
DIR By: ArleneAncheta
Date: August 14, 2016, 12:59 am
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There are two types of stepper motors: unipolar and bipolar
stepper motors. On a fundamental level, these two types work
exactly the same way; electromagnets are turned on in a
sequential fashion, inducing the central motor shaft to spin.
The difference between the two types is the voltage levels. A
unipolar stepper motor only operates with positive voltage, so
the high and low voltages applied to the electromagnetic coils
would be something like 5V and 0V. A bipolar stepper motor has
two polarities, positive and negative, so its high and low
voltages would be something like 2.5V and -2.5V.
Taking these electrical differences into account, the physical
difference between these two styles is that the unipolar
configuration requires an extra wire in the middle of each coil
to allow current to flow through either to one end of the coil
or the other. These two opposite directions produce the two
polarities of the magnetic field, effectively mimicking the
positive and negative voltage capabilities of the bipolar
stepper motor.
Although both of these have a overall voltage range of 5V, the
bipolar stepper motor will actually have more torque because
current flows the entire coil, producing a stronger magnetic
field to induce the shaft to rotate to the appropriate angle. On
the other hand, unipolar stepper motors only utilize half of the
coil length due to the extra wire in the middle of the coil, so
less torque is available to magnetically hold the shaft in
place.
#Post#: 36--------------------------------------------------
Re: Unipolar Stepper Motor and Bipolar Stepper Motor
DIR By: Lulubels
Date: August 22, 2016, 12:17 am
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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. A unipolar stepper motor has two windings per
phase, one for each direction of magnetic field.
#Post#: 44--------------------------------------------------
Re: Unipolar Stepper Motor and Bipolar Stepper Motor
DIR By: Sienna
Date: August 22, 2016, 12:21 am
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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. A unipolar stepper motor has two windings per
phase, one for each direction of magnetic field.
#Post#: 47--------------------------------------------------
Re: Unipolar Stepper Motor and Bipolar Stepper Motor
DIR By: Cheska Lintag
Date: August 22, 2016, 12:23 am
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Unipolar stepper motor, each winding is made relatively simple
with the commutation circuit, this is done since the arrangement
has a magnetic pole which can be reversed without switching the
direction of the current. Unlike the unipolar stepper motor, the
bipolar stepper motor has two leads per phase, neither of which
are common.
#Post#: 53--------------------------------------------------
Re: Unipolar Stepper Motor and Bipolar Stepper Motor
DIR By: theyseemae
Date: August 22, 2016, 2:03 am
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A unipolar stepper motor has two windings per phase, one for
each direction of magnetic field.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.
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