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 FN5040 / FN5045 series output filters eliminate
premature motor damage caused by high DV/DT, overvoltages, cable ringing, motor overheating and eddy current losses. The output filter converts regular PWM output voltage of motor drives into a smooth sine wave ...
Description:
All pole sine filters achieve excellent EMC properties,
since both conducted and radiated disturbances are minimised. The usage is recommended for filtering the drives of for example elevators, fans, pumps and compressors, which are located in sensitive environments. This includes ...
Description:
The Common Mode Filter in Combination with the
Sine Filter 3AFS400 (Differential Mode) results in an All-Pole Sine-Filter. The filter allows frequencies up to 1000 Hz and filters the switching and higher frequencies. All models are highly reliable and excellent ...
