Hilkar Sine Wave Output Filter Modules convert the PWM output of motor drives into a smooth sinusoidal voltage waveform with minimal residual ripple. They eliminate the harmful effects of square-wave voltages and high dv/dt spikes generated at the inverter output, protecting motors and associated equipment.
These filters are particularly effective in applications with long motor cable lengths, reducing reflected wave overvoltages, motor insulation stress, bearing currents, and electromagnetic interference. They also enable low-voltage motor drives to operate medium-voltage motors through step-up transformers while maintaining a high-quality sinusoidal output.
- Nearly perfect sinusoidal output voltage
- Protects motors from high voltage spikes and dv/dt stress
- Eliminates motor acoustic noise
- Reduces motor bearing currents
- Extends equipment service life
- Complies with general-purpose motor standards
- Allows the use of unshielded motor cables
- Suitable for multiple motor operation
- Motor drives with long motor cables
- Motor drives with existing motors
- Motor drives with step-up transformers
- Compressors
- HVAC Systems
- Cranes
- Conveyors
- Elevators and Escalators
- Pumps
- Motor Drive Input Power
0.3–630 kW
Parallel operation available for higher ratings
- Operating Voltage
≤690V
Standard voltages
- Operating Frequency
50 Hz / 60 Hz
Without derating
- Rated Current
1 A - 1200 A
- Minimum Switching Frequency
1.5 kHz – 4 kHz
Depending on filter rating
- Maximum Switching Frequency
8kHz
- Overload Capability
1.6×
Rated current, 1 min/hour
- Protection Degree
IP20
Higher protection degrees available on request
- Ambient Temperature
−30 °C … 50 °C
- Maximum Altitude
<1000m*