Powering Precision, Protecting Performance

dv/dt Filters

Our dv/dt filters are designed to provide superior protection and performance for motor drives across various industries. By reducing drive output voltage dv/dt and voltage stress at motor windings, our filters protect AC motors from the destructive effects of peak voltages, increase motor service life, and improve system reliability.

  • Maximized Motor Lifespan
  • Motor Protection
  • Reduced EMI
  • Voltage Stability

Product Options

Voltage
  • Low: 690 V & Below
  • Medium: 690 V - 4,160 V
Winding
  • Copper
  • Aluminum
Cooling
  • Air-Cooled
  • Liquid-Cooled

Applications

dv/dt filters dominate in the most demanding applications, delivering unmatched performance and reliability for:

  • Precision motor drives and inverters
  • HVAC systems
  • Mining and conveyor systems
  • Electric vehicle powertrain testing
  • Oil and gas operations
  • Marine propulsion and onboard systems
  • Machinery comprising servo or torque motors

Engineered to excel. Built to endure.

Reliable Power Protection

Our dv/dt filters are engineered to optimize your operations by:
  • Reducing Voltage Stress: Minimize destructive voltage spikes and protect motor windings from premature aging and failure.
  • Lowering dv/dt Rates: Sharply reduce the rate of voltage change to safeguard motors and cables from insulation damage.
  • Eliminating Overvoltages: Prevent harmful overvoltages caused by line reflections, ensuring stable motor operation.
  • Enhancing Motor Lifespan: Extend the service life of AC motors by reducing stress on insulation and windings.
  • Improving System Reliability: Deliver consistent performance and uptime for mission-critical applications.
  • Reducing Electromagnetic Interference (EMI): Minimize noise propagation to neighboring equipment, ensuring cleaner operation.

Reliable Solutions Across Critical Industries

Industrial Automation and Manufacturing:

  • Precision motor drives for CNC machinery, robotics, and automation
  • Conveyor systems, material handling, and heavy equipment motor drives
  • Pumps, compressors, and fans for industrial processes

Energy and Infrastructure:

  • Motor drives for oil and gas pumping systems (e.g., ESPs and rod pumps)
  • Inverters for solar, wind, and grid-tied energy storage systems
  • Critical backup power systems and data center cooling solutions

EV and Marine:

  • EV drivetrain systems, including hybrid vehicles and charging infrastructure
  • Heavy equipment motor drives
  • Shipboard power systems and electric propulsion drives

HVAC and Building Management:

  • Energy-efficient HVAC motor drives for commercial and residential buildings
  • Pumps, fans, and compressors for climate control solutions
  • Precision motor drives for critical airflow systems

Specifications

dv/dt Filters

Maximum Continuous Operating Voltage
3x690 VAC

Nominal Operating Voltage
3x550 VAC

Max. Peak Spike Voltage
2000 V

Rated Currents
12 to 1100 A @ 50°C

Overload Capability
1.5 x rated current for 1 minute, once per hour

Typical dv/dt Reduction
8 db - 12 db under full load conditions

Voltage Drop
<10 V @ 60 Hz

Inductor % Impedance
2.5% - 3.5% | 3% typical

Motor Frequency
0-120 Hz

Motor Cable Length
Up to 500 m

Switching Frequency
max. 16 kHz, depending on motor cable length & operating voltage

High Potential Test Voltage
P -> E 3300 VAC,1 minute
P -> P 3300 VAC (without caps), 1 minute
P -> P 2500 VDC caps, 2 s

Overvoltage Category
OV III (IEC 60664-1)

Temperature Range (operation & storage)
-25°C to +50°C fully operational
+40°C to +100°C with derating*
-25°C to +100°C transport and storage

Agency Recognitions
cЯUus 1446

Custom Solutions

Get a Custom Design in just 2 Business Days

No project is too complicated.

We are here to work with you every step of the way.

Other Other Products

Product Categories