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System Manual V2 – MOVITRAC® B
6
HF output filters
Project Planning
The procedure for selecting the PWM frequency and checking the inverter is
summarized in the following figure.
Noise sensitive
environment in which HF is used
(not motor!)
No
Motor cable type
High EMC requirements
Optimized filtering against ground
Shielded
With V
DC link
connection
(P862) PWM frequency 4 / 8 kHz
With U
DC link
connection
(P860) PWM frequency 12/16 kHz
(P862) PWM frequency = FIX
Yes
Unschielded
Length of motor cable
(also total length for
group drive)
> 20 m
< 20 m
No
Yes
Mains voltage?
FI output current increases by
u =
12 %
(12 kHz)
u =
8 %
(16 kHz)
3 x AC 400 V
HF...-403 not permitted
FI output current increases by
u =
15 %
(12 kHz)
u =
12 %
(16 kHz)
3 x AC 500 V
Choose HF output filter from table depending on
motor current
(sec. "Technical Data and Dimension Drawings - HF... Output Filters).
Please note:
I
HF_rated
I
rated_motor
I
motor
Motor cable length only
limited by voltage drop
Motor cable length only
limited by voltage drop
Required output current FI
= (1+u) x motor current
Take minimization of FI output current into account.
Requirements: Performance reduction due to PWM frequency,
ambient temperature, continuous current consumption.
See section "Project Planning" in system manual
FI output current does not
increase (u = 0)
3 x AC 230 V
FI output current increases by
u =
4 %
(12 kHz)
u =
3 %
(16 kHz)
FI output current large enough?
Yes
No
Select larger
FI
Checking the frequency inverter (FI)
and selecting the HF filter
Selecting PWM frequency
and V
DClink
connection
.
Summary of Contents for MOVITRAC MC07B0037-2A3-4-00
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