Active Power Filter Banner

Engineered for
Motor Protection

Sine Wave Filter

P2 Power Sine Wave Filters are engineered for use with Variable Speed Drives (VSDs) and Variable Frequency Drives (VFDs) to convert the high-frequency Pulse Width Modulated (PWM) output voltage into a smooth, sinusoidal sine-wave voltage. Designed as a heavy-duty LC low-pass filter circuit, it eliminates peak voltage spikes (dv/dt), high-frequency common-mode noise, and voltage reflections before they reach the motor


By converting the drive's output into a smooth sinusoidal waveform, P2 Power Sine Wave Filters dramatically reduce motor insulation stress, eddy current losses, and motor heating. They suppress high-frequency acoustic switching noise, prevent premature motor bearing damage caused by fluting, and enable ultra-long motor cable lengths without requiring expensive shielded cables or auxiliary step-up transformers


Active Power Filter
How it works?
How the Active Power Filter works
Key Features
Galvanic Isolation: Complete physical and electrical decoupling between input and output, suppressing transient voltages and eliminating ground loops
Sinusoidal Output Conversion: Smooths PWM switching waveforms into pure sine wave phase-to-phase and phase-to-neutral voltages
dv/dt & Peak Voltage Spike Suppression: Eliminates voltage peaks and transient voltage stress on motor windings
Supports Long Motor Cable Runs: Permits extended cable lengths between the VFD and motor (up to hundreds of meters) by preventing wave-reflection voltage doubling
Extends Motor Life & Reduces Maintenance: Minimizes motor core heating, insulation degradation, and bearing currents to prolong equipment lifespan
Eliminates Acoustic Noise: Significantly reduces high-frequency audible motor hum and mechanical vibration caused by PWM switching
High Switching & Fundamental Frequency Support: Compatible with drive switching frequencies up to 20 kHz and fundamental output frequencies up to 1 kHz
High Fault Current Resilience: Short-circuit withstand capability up to 50 kA and rated for continuous currents up to 2 kA

Technical Specifications
Rating of FilterAs per requirement
Test voltageL-L 2100 V, DC 1s; L-PE 2500 V, DC 1s
Climatic categoryDIN IEC 60068-1
Overload1.5 × IN rated - 1 min / h
Rotary field frequency0 - 60 Hz
Short circuit voltage Uk8% (with 400V)
Voltage drop18.4 V/branch (with IN and 50Hz)
Max. Ambient temperature40°C, max. voltage ripple: 5%
Clock frequency of converterup to 150 A >= 4kHz, from 150 A on >= 1.5 kHz
Max. Cable length to the motor600 m (shielded) 1000 m (unshielded)
Thermal classF (@ 45° C Environment)
Max. Winding temp155° C

Applications

  • Submersible, Deep-Well & Centrifugal Pumps
  • HVAC Systems, Blowers & Industrial Fans
  • Long Cable Applications (Subsea, Offshore & Mining Installations)
  • Cranes, Hoists & Material Handling Systems
  • Conveyors & Heavy Industrial Motor Drives
  • Oil & Gas Processing Equipment
  • Retrofitting Non-Inverter-Duty Motors to VFD Drives
  • Renewable Energy Systems & Microgrids