Sine Wave Filters FN530

Sine Wave and EMC Output Filter for Motor Drives with a DC Link Access


Sine Wave and EMC Output Filter for Motor Drives with a DC Link Access

  • Smoothing of PWM drive output voltage
  • Efficient motor protection
  • Reduction of common-mode interferences on motor cables
  • Improvement of EMC environment
  • Elimination of motor bearing damages
  • Possibility to use very long unshielded motor cables
  • Improvement of system reliability

Features and Benefits

Conversion of the PWM output signal (differential and common-mode 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, eddy current losses or bearing damage
Elimination of interference propagation towards components or conductors in the vicinity
Provision of all benefits of traditional LC sine wave filters, plus:
Allows the use of extremely long unshielded motor cables without causing radiation problems (EN 55014, MDS clamp)
Restricts pulse currents to ground and hence limits leakage currents in the PE
Reduces the required EMI suppresssion efforts on the line side
Allows the use of lower rated drives with long motor cables due to lower losses in the IGBTs and in the motor cable

Typical Applications

Motor drive applications with extremely long motor cables
Motor drive applications with unshielded motor cables
Chemical and petro-chemical applications
Semi-conductor manufacturing
Mission critical applications
Applications with multiple motors in parallel
Retrofit of motor drives into existing installations with old wiring and motors

Technical Specifications

Nominal operating voltage

3x480 VAC

Rated currents

4 to 16 A

DC link voltage

850 VDC max.

Overload capability

1.4x rated current for 1 minute, every 15 minutes

Residual ripple voltage


Voltage drop

≤10 V @ 50 Hz

Current in +/- control loop

1 to 2 A approx

Motor frequency

0 to 200 Hz

Motor cable length

max. 1000 m

Switching frequency

6 to 20 kHz

High potential test voltage

P –> E 2500 VDC for 2 sec

P –> P 1100 VDC for 2 sec

Temperature range (operation and storage)

-25°C to +100°C (25/100/21)

Protection category

IP 20

Flammability corresponding to

UL 94 V-2 or better

Design corresponding to

UL 1283, CSA 22.2 No. 8 1986, IEC/EN 60939

Approvals & Compliances

RoHS Label