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Three-Phase Sine Wave Filter Inductors

Voltage distortion in Three-phase systems causes heat buildup, waveform instability, and early equipment wear. Frigate’s Three-Phase Sine Wave Filter Inductors deliver balanced impedance and harmonic suppression in high-current environments.

Inductance (L)

0.5-30 mH per phase (Precisely matched ±2% between phases)

Current Rating (Irms)

10-300 A/phase (With thermal derating curves available)

Current Rating (Isat)

15-450 A/phase (Tested at 10% inductance drop)

Line-to-Line Voltage Rating

480VAC (690VAC optional), 1000VDC isolation

Frequency Range

50-3000 Hz (Optimized for VFD and industrial inverter applications)
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Product Description

Each unit provides phase-matched inductance from 0.5 to 30 mH, with current ratings up to 300 A per phase. These filters reduce switching ripple and maintain waveform purity under variable load.

Phase Balance Tolerance

±1% inductance matching (Ensures balanced 3-phase operation)

DC Resistance (DCR)

0.005-0.2 Ω/phase (Low-loss design using oxygen-free copper)

Core Material

Grain-oriented silicon steel (Low hysteresis losses at high power)

Tolerance (%)

±3% standard (±1% available for precision applications)

Temperature Range

-25°C to +150°C (Derating above 40°C ambient)

Mounting Style

Bolt-down chassis mount (Stainless steel hardware included)

Surge Withstand Capacity

3kV for 10μs (IEC 61000-4-5 compliant)

EMI/RFI Suppression

>40dB attenuation from 150kHz-30MHz (EN 55011 Class A)

Insulation Class

Class F (155°C) with UL1446 insulation system

Certification Standards

UL508, IEC 61800-3, CE, RoHS 3 compliant

Technical Advantages

Our inductors use high-permeability, grain-oriented cores with low eddy loss characteristics. This allows high current throughput with tight inductance balance between all three phases. 
Each model operates reliably across 50 to 3000 Hz and maintains effective EMI suppression above 40 dB within the 150 kHz–30 MHz band. Low DCR windings made from oxygen-free copper minimize I²R losses while reducing system temperature rise. 

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Industry Applications

Variable Frequency Drives (VFDs)

Mitigates switching noise and common-mode voltage before motors. 

Industrial HVAC Systems

Improves waveform quality at compressor inlets and prevents coil overheating. 

CNC and Motion Control Equipment

Maintains phase symmetry and signal stability for servo-driven axes. 

Battery Energy Storage (BESS)

Filters high-frequency output from inverters in grid-tied and off-grid setups.

Marine Electrical Panels

Reduces harmonic interference in propulsion and auxiliary power systems.

Packaging and Robotics Lines

Supports clean power delivery to multi-axis machines and PLC-driven controllers. 

Fit-for-Space Builds with Ruggedized Operational Stability

Not every panel layout leaves space for large filter builds or external derating components. Our Three-Phase Sine Wave Filter Inductors are built for bolt-down mounting with stainless steel hardware and optimized for compact control assemblies. 

We include options with tighter phase-matching (±1%) for mission-critical loads and support surge withstand ratings up to 3kV per IEC 61000-4-5. UL508 and CE certifications ensure smooth integration into global control systems without redesign or added approvals.

Three-Phase Sine Wave Filter Inductors

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Having Doubts? Our FAQ

Check all our Frequently Asked Question

How does Frigate maintain phase balance across three inductors in critical power systems?

Frigate matches inductance within ±1% across all three phases during production. This reduces circulating currents and ensures symmetrical magnetic loading. Core windings are precision-aligned to avoid mismatch-induced losses. Final units are tested under simulated unbalanced loads to validate phase current accuracy. 

What protections are built into Frigate’s Three-phase sine wave inductors for voltage surges?

These inductors are built to withstand 3kV surge pulses for 10μs, in line with IEC 61000-4-5. The winding insulation follows UL1446 standards with Class F thermal class. Shielded designs and proper spacing prevent arc tracking during transient events. All units undergo insulation stress tests before dispatch.

Can these inductors suppress EMI in variable frequency drive (VFD) applications?

Yes. Frigate’s Three-phase inductors offer over 40dB attenuation from 150kHz to 30MHz. The geometry and core material are tuned to target switching frequencies common in VFD systems. These units comply with EN 55011 Class A, reducing conducted interference along motor cables and back to the grid. 

How does Frigate prevent inductance drop at higher currents in continuous-duty cycles?

Frigate uses grain-oriented silicon steel cores with low magnetic losses. Inductors are sized for up to 450A peak saturation current with less than 10% drop in L value. The design ensures stability under both sinusoidal and pulse-modulated loads. Thermal derating curves are provided for long-cycle usage.

What mounting and installation features are included for panel integration?

Each unit uses a bolt-down chassis mount with stainless steel hardware for secure placement. The design suits narrow enclosures and includes base holes for both DIN and OEM panel formats. All models ship with grounding lugs and cable brackets for structured wiring. These mounts simplify retrofits and first-fit installs.

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LOCATIONS

Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

Operations Office

9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti, Coimbatore-641035, Tamil Nadu, India. ㅤ

Other Locations

  • Bhilai
  • Chennai
  • India
  • Germany
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LOCATIONS

Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

Operations Office

9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti, Coimbatore-641035, Tamil Nadu, India. ㅤ

Other Locations

  • Bangalore
  • Chennai
  • India
  • Germany
Become a Frigatian
Become a Supplier

GENERAL ENQUIRIES

  • +91 96778 64606
  • manufacture@frigate.ai
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Three-Phase Sine Wave Filter Inductors

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Three-Phase Sine Wave Filter Inductors

Need reliable Machining for your next project? Get in touch with us today, and we’ll help you find exactly what you need!

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