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phytron
23 MA 2107-A005 EN
6 Motor Connection
The following chapter describes how to wire different types of Two-phase stepper motors.
MSX stepper motor power stages may be connected to stepper motors with
1.1 to 15.4 A
Peak
phase current.
The stepper motor winding resistance should be less than 10 Ohm for full power.
The winding inductivity of one phase should be above than 0.5 mH.
Stepper motors with 8 leads can be connected with the windings wired in parallel (1) or
serial (2).
For 6-lead stepper motors, wiring scheme (3) with serial windings is recommended. If
wiring scheme (3) cannot be used because of the motor construction, the motor may be
operated with only two of the four windings energized according to wiring scheme (4).
Warning:
5-lead stepper motors must not be connected to the MSX.
Both 5-lead stepper motor and MSX might be damaged.
Motor time constant
τ:
R
L
=
τ
applies to the electric motor time constant τ.
The total inductivity L
total
is equal to the winding inductivity in a parallel circuit, because
of interlinked inductivities.
L
ges
=
4 x L applies to a serial circuit.
The result is an equal motor time constant τ for a serial and a parallel circuit:
Circuit Serial parallel
Resistance R
total
2 x R
2
R
Inductivity L
total
4 x L L
Motor time constant τ
R
L x 2
R x 2
L x 4
serial
= = τ
R
L x 2
R/2
L
=
parallel
= τ