Logic Supply Voltage; Motor Cables And Motor Chokes; Figure 4-50 Wiring Of Logic Supply - maxon motor EPOS4 Module 24/1.5 Hardware Reference Manual

4.1.3
The Module features a logic supply voltage input. Its voltage range is 10...24 V and must be either
sourced separately or by the power supply voltage.
Figure 4-50
If the logic supply voltage is sourced separately, a transient voltage suppressor diode (D2) at the logic
supply voltage input can be connected to protect the module against overvoltage.
4.1.4
The Module is not equipped with internal motor chokes.
The majority of motors and applications do not require additional chokes. However, in case of high sup-
ply voltage with very low terminal inductance, the ripple of the motor current can reach an unacceptably
high value. This causes the motor to heat up unnecessarily and causes instable control behavior. The
minimum terminal inductance required per phase can be calculated using the following formula:
L
Phase
L
Phase
V
CC
f
PWM
A [ ]
I
N
L
Motor
maxon motor control
EPOS4 Positioning Controller
EPOS4 Module/Compact 24/1.5 Hardware Reference

Logic Supply Voltage

Wiring of logic supply

Motor Cables and Motor Chokes

V

1
CC
≥ ⋅
-- - -----------------------------
–

⋅ ⋅
2 6 f I
PWM N
[ ]
H
Additional external inductance per phase
V [ ]
Operating voltage +V
[ ]
Hz Switching frequency of the power stage = 100'000 Hz
Nominal current of the motor (line 6 in the maxon catalog)
[ ]
H Terminal inductance of the motor (line 11 in the maxon catalog)
Document ID: rel6627
Edition: November 2016
© 2016 maxon motor. Subject to change without prior notice.
Requirements for Components of Third-party Suppliers

( ⋅ )
0.3 L

Motor
CC
Motherboard Design Guide
4-75