IMS IM483 - Figure 6.1 Per Phase Winding Inductance

24 IM483 Operating Instructions Revision R032306
25IM483 Operating Instructions Revision R032306
Figure 6.1 A & B: Per Phase Winding Inductance
The per phase winding inductance specied may be different than the
per phase inductance seen by your IM483 driver depending on the wiring
conguration used. Your calculations must allow for the actual inductance
that the driver will see based upon the wiring conguration.
Figure 6.1A shows a stepper motor in a series conguration. In this
conguration, the per phase inductance will be 4 times that specied.
For example: a stepping motor has a specied per phase inductance of
1.47mH. In this conguration the driver will see 5.88 mH per phase.
Figure 6.1B shows an 8 lead motor wired in parallel. Using this congu-
ration the per phase inductance seen by the driver will be as specied.
Using the following equation we will show an example of sizing a motor
for a IM483 used with an unregulated power supply with a minimum
voltage (+V) of 18 VDC:
.2 X 18 = 3.6 mH
The recommended per phase winding inductance we can use is 3.6 mH.
Maximum Motor Inductance (mH per Phase) =
.2 X Minimum Supply Voltage
NOTE: In calculating the maximum phase inductance, the
minimum supply output voltage should be used when using an
unregulated supply.
PHASE A
PHASE A
PHASE B
PHASE B
8 Lead Stepping Motor
Series Configuration
8 Lead Stepping Motor
Parallel Configuration
PHASE A
PHASE
A
PHASE B
PHASE
B
(Note: This example also
applies
to the 6 lead motor
full copper configuration
and
to 4 lead stepping motors)
(Note: This example also
applies to
the 6 lead motor
half copper configuration)
Specified Per Phase
Inductance
Specified Per Phase
Inductance
Actual Inductance
Seen By the Driver
Actual Inductance
Seen By the Driver
A B