Xenus Plus User Guide
16-01344 Rev 06
Copley Controls
151
D.1: Overview
The XTL-FA-01 edge filter can be used to minimize noise on the output of any Xenus Plus drive.
D.1.1: Differential and Common Mode Filtering
Most noise is capacitively coupled from the motor power cable to neighboring cables. To minimize
this noise, the XTL-FA-01 edge filter uses both differential edge filtering and common mode filtering.
Differential edge filtering reduces the high frequency component of the PWM signal, thus producing
a signal with less energy that can be coupled during transmission. Common mode filtering reduces
the unnecessary common mode noise generated by PWM signals.
D.1.2: Description and Functional Diagram
The differential filter increases the rise time by at least a factor of 3, substantially reducing noise in
the system. Copley Controls drives typically have a 150 ns rise-time (high frequency component in
the MHz range). Thus, the edge filter can increase rise time to 500 ns, reducing the high frequency
noise emissions by the square law. The differential filter is designed with 82 µH inductors and a
proprietary passive circuit. The inductance will provide a total of 164µH in series with the load,
helping to reduce ripple current. This brings low inductance motors into the required range.
The common mode filter is designed with a 220 µH common mode toroid that works with the cable
capacitance to earth ground to remove common mode switching noise.
D.1.3: PWM Output Plot
Amp
Filter
Motor
U
V
W
J1
J1-4
J1-3
J1-2
J1-1
Common
Mode
82uH
82uH
82uH
Differential
Mode
J2
J2-4
J2-3
J2-2
J2-1
U
V
W
Case GND
+HV
500ns
10%
90%
Raw PWM
Filtered
150ns
Содержание XEL-230-18
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Страница 82: ...Xenus Plus User Guide 16 01344 Rev 06 Copley Controls 82 3 25 3 XE2 XP2 XM2 non N models 800 1819 Dimensions...
Страница 116: ...Xenus Plus User Guide 16 01344 Rev 06 Copley Controls 116 Optically Isolated Programmable Outputs Wiring Diagram...
Страница 120: ...Xenus Plus User Guide 16 01344 Rev 06 Copley Controls 120 Analog Input Wiring Diagram Multi Mode Port Interface Diagram...