Sinusoidal filters are passive components used to provide electrical circuits with the correct frequencies to ensure optimal performance. These elements, also called sine wave filters, are low pass devices which means they let low-frequency signals pass but block or impede high-frequency signals.
Circuits requiring longer cables usually have sinusoidal filters to convert rectangular pulse width modulation (PWM) signals into smooth wave voltage. This will prevent premature circuit damage and prolong the lifespan of AC motor drives by reducing stress on the motor's insulation.
What are sinusoidal filters used for?
Sinusoidal filters protect motor windings and bearings from damage due to voltage spikes, cable stripping, current loss and overheating.
These filters are used in equipment such as pumps, ventilators, conveyors, compressors, elevators and cranes.
Types of sinusoidal filters
Enclosed or open panel versions exist:
Enclosed filters come in pre-packed boxes and can be installed onsite for immediate use without any adjustments, mounting or wiring needed.
Open panel filters are assembled leaving the back panel accessible for the user to mount and wire as preferred.
Description:
The B86301U Series from EPCOS are optimised for
motor cables and full load operations. These EMC filters feature natural cooling and have a 3 phase dv/dt output reactor construction. Complying with IEC60076-6, the 8A-24A options offer IP20 protection, the 45A-112A ...
Description:
Schaffner's FN3359 filters provide a compact high-current filter
solution with minimum space requirement. All filters 320 A and above are suitable for regenerative motor drive system (with a suitable line reactor).Can be used in a wide range of applications such ...
Description:
The B84143V*R227 series from EPCOS are sine wave
output filters for 3 phase systems. Constructed from 3-line filters, these EMC filters are easy to install and feature a compact design. Offering eddy current losses and a reduction of motor noise, ...
