1st edition, 12.02.2021
7000.05071, 1st edition, 12.02.2021
7000.05071
Installation
75
4.3.6.4
Input-side filters
Measures are provided on the motherboard that come very close to providing the interfer-
ence-reducing effect. Additional input-side filters (FAULHABER 6501.00367) are usually only
needed in ambient conditions that place particular requirements on the interference resist-
ance or if the emissions are noticeable.
These filters are for applications that either cannot use the motor filter (e.g., integrated
controllers) or in which the filtering by the motor filters is not sufficient. In this case, two fil-
tering measures are used:
Measure comparable to large capacitors (approx. >100
μ
F) as close as possible to the
controller and, where possible, low-ESR capacitances
Discharge of common-mode interference with a common-mode choke, a low-pass filter
and capacitors between functional earth and DC power supply
4.3.6.5
Insulation resistance
The filters from FAULHABER are not intended for an insulation resistance test. Discharging
of the common-mode interference with capacitors prevents a meaningful result from an
insulation resistance test.
4.3.6.6
Coiling ferrite ring
Ideally, ferrites made of manganese-zinc material are used that are active in the 1…10 MHz
range. Typical diameters are between 25 and 35 mm onto which two to three windings
with all 3 motor phases are wound simultaneously.
Fig. 35: Coiling ferrite ring
1. Fasten motor phase cables, e.g., with cable ties (1), so that the motor side end of the
cable points away from the user and the plug end of the cable points toward the user.
2. Simultaneously guide all three phases through the ferrite ring from below.
3. Guide the wound stranded wires back through the ring clockwise next to the first
stranded wires so that a winding is created.
4. Wrap 2 further windings directly next to the existing windings in the same way.
There are 9 stranded wires in the ferrite ring.
5. Again secure the motor phase cables, e.g., with cable ties (2), on the ferrite ring.
1
Fastening the motor phase cables
2
Fastening on the ferrite ring (optional)
1
1
2
2