Hilkar dv/dt Output Filter Modules protect motors from high-voltage spikes generated by PWM motor drives using IGBT switching devices. Because IGBT rise times are typically between 50 ns and 200 ns, even relatively short motor cables can produce voltage doubling at the motor terminals due to the travelling wave phenomenon.
These filters reduce the dv/dt (rate of rise of voltage) and limit reflected wave overvoltages, protecting motor winding insulation, extending motor life, and improving the reliability of variable speed drive (VSD) systems.
- Reduces dv/dt stress on motor windings
- Extends equipment service life
- Complies with general-purpose motor standards for cable lengths up to 100 m
- Compact and cost-effective solution for short cable applications
- Reduces electromagnetic interference (EMI) on nearby equipment
- Motor drives with short motor cables
- Motor drives with existing motors
- Process industry
- Oil & Gas Industry
- HVAC Systems
- Water and Wastewater Treatment Plants
- Irrigation Systems
- 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
- Altitude
<1000m*