DATASHEET Sine wave filters FN 5020
Sine wave output filter for high-speed motor drives
Smoothing of PWM drive output voltages Approvals
Increased service life of expensive high-speed
motors
Reduction of audible motor noise
Improvement of system reliability
Production up-time for mission critical
applications
Features and benefits
Suitable for fast rotating fields up to 600 Hz
Conversion of the PWM output signal (symmetrical
voltage components) of motor drives into a smooth
sine wave with low residual ripple
Elimination of premature motor damage caused by
high dv/dt, overvoltages, motor overheating and
eddy current losses
Significantly increased service life of expensive
(high-speed) motors
Reduction of the pulse load of motor drive IGBTs
and the parasitic losses on long shielded motor
cables
Less interference propagation towards neighboring
equipment or lines
Advanced choke design to minimize filter losses
and voltage drop
IP20 protection, touch-safe terminals and
temperature monitoring function to increase overall
equipment safety
Technical specifications
dc link voltage 1000 VDC max.
Typical applications
Design corresponding to UL 1283, CSA 22.2 No. 8 1986,
Flammability corresponding to UL 94 V-2 or better Motor drives and motors in high-speed applications,
like:
High potential test voltage P > E 2000 VAC for 2 sec
P > P 1000 VDC for 2 sec
High-speed spindles
Lifetime (calculated) > 10 years (25, 55 A)
Textile machinery
~ 5 years (75, 120 A)
Lasers
Maximum continuous operating voltage 3x 500/288 VAC
Military appliances (400 Hz)
Motor cable length 200 m max.
Motor frequency 0 to 600 Hz
Motor drive applications with medium to long motor
MTBF @ 50C/400V (Mil-HB-217F) >100,000 hours
cables and/or with multiple motors in parallel, like:
Overload capability 1.5x rated current for 1 minute, once per hour
Pumps
Protection category IP20
Conveyors
Rated currents 25 to 120 A @ 50 C
Residual ripple voltage <5%
Switching frequency 6 to 15 kHz
Typical electrical schematic
Temperature range (operation and storage) -25 C to +100 C (25/100/21)2
Output filters and load reactor Schaffner Group Datasheets 2014
Filter selection table
Filter Rated current Typical motor Typical Output Weight
@ 50 C power rating* power loss** connections
[A] [kW] [W] [kg]
FN 5020-25-33 25 15 n.a. -33 13
FN 5020-55-34 55 30 n.a. -34 29
FN 5020-75-35 75 45 n.a. -35 49
FN 5020-120-35 120 75 n.a. -35 57
* General purpose four-pole (1500r/min) AC induction motor rated 480 V/50 Hz.
** Exact value highly depends upon the motor cable type and length, switching frequency, motor frequency and further stray parameters within the system. Please contact your
local Schaffner partner for individual application support.
Typical block schematic
Temperature monitoring function
All filters of this range are equipped with a temperature monitoring function. The built- in temperature sensor opens a potential-free contact in the case of filter
overtemperature (>120 C). The maximum switching capability is 6A/250 V. This function can be used, for example, in the input of a CNC controller or as the trip of a
circuit breaker in order to interrupt the mains power supply. Connec- tions are located next to the phase con- nectors (see mechanical data for details).
Forced cooling
The 75 A and 120 A filters provide internal cooling fans which require external power supply (24 VDC/~4 W). Connections are located next to the connectors of the
temperature sensor (see mechanical data for details).
For additional information please consult the Schaffner application note Sinus Plus New Output Filter Concept for Power Drive Systems.