What's the Difference Among 4-Wire,6-Wire,8-Wire Step motor
by Curry Lee Führende Dentalgeräte und ZahnarztI have a stepper motor with either 4, 6, or 8 lead wires available to connect to a stepper driver. What is the difference between these wiring types, and does this affect how I connect the motor to my drive?
Solution
The basic operation of any stepper motor relies on the use of inductive
coils which push or pulls the rotor through its rotation when they are
energized. A pair of wire leads coming from a stepper motor will
correspond to at least one of these windings and possibly more depending
on the motor type. In each of the following cases a chassis ground lead
is also pictured to ensure the motor is correctly grounded.
4-Wire Stepper Motors
While many motors take advantage of 6- and 8-wire configurations, the
majority of bipolar (one winding per phase) stepper motors provide four
wires to connect to the motor windings. A basic 4-wire stepper motor is
shown in Figure 1. Connecting this motor type is very straightforward
and simply requires connecting the A and A' leads to the corresponding
phase outputs on your motor drive.
6-Wire Stepper Motors
A 6-wire stepper motor
is similar to a 4-wire configuration with the added feature of a common
tap placed between either end of each phase as shown in Figure 2.
Stepper motors with these center taps are often referred to as unipolar
motors. This wiring configuration is best suited for applications
requiring high torque at relatively low speeds. Most National
Instruments stepper motor interfaces do not support 6-Wire stepper
motors, although some motors do not require the center taps to be used
and can be connected normally as a 4-wire motor.
8-Wire Stepper Motors
Some motors are also offered in 8-Wire configurations allowing for
multiple wiring configurations depending on whether the motor's speed or
torque is more important. An 8-wire stepper motor
can be connected with the windings in either series or parallel. Figure
3 shows an 8-Wire stepper motor with both windings of each phase
connected in series. This configuration is very similar to the 6-wire
configuration and similarly offers the most torque per amp at the
expense of high speed performance.
It is also possible to connect an 8-wire stepper motor with the windings
of each phase connected in parallel as shown in Figure 4. This
configuration will enable better high speed operation while requiring
more current to produce the rated torque. This connection type is
sometimes known as parallel bipolar wiring.
Although every stepper motor online operates in the same basic way, it is important to understand the difference between each wiring type and when each should be used.
Source:
https://www.oyostepper.com/article-1095-Whats-the-Difference-Among-4-Wire6-Wire8-Wire-Step-motor.html |
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Created on Nov 13th 2019 21:13. Viewed 1,691 times.