AC Input output Foil Wound Reactor
✅Higher efficiency (lower losses)
✅Better thermal management (reduced overheating risk)
✅Longer lifespan (durable construction)
✅for high-power applications.
- Product Introduction
AC input output foil wound reactor is a type of inductor constructed using flat conductive foil (typically aluminum or copper) instead of traditional round wire. It is widely used in power electronics, renewable energy systems, industrial drives, and grid applications due to its high current capacity, low losses, and excellent thermal performance.
Key Features
● High Current Capacity
Flat foil design reduces skin effect, allowing higher current density than round wire.
Lower AC resistance due to optimized conductor geometry.
● Low Losses
Reduced proximity & eddy current losses compared to wire-wound reactors.
Efficient cooling due to large surface area.
● Robust Construction
Mechanically stable (resistant to vibration & thermal expansion).
High dielectric strength (suitable for high-voltage applications).
● Customizable Designs
Adjustable inductance, current rating, and cooling method based on application.
Electric Parameters
| Parameter | Range / Value |
|---|---|
| Inductance (L) | 1 µH – 100 mH |
| Current Rating | 10 A – 10,000 A (RMS) |
| Frequency Range | 50 Hz – 100 kHz |
| DC Resistance (DCR) | 0.1 mΩ – 1 Ω |
| Insulation Class | Class B (130°C), F (155°C), H (180°C) |
| Voltage Rating | Up to 35 kV (for high-voltage reactors) |
| Temperature Rise | ΔT < 80°C (typical) |
Compared to Wire-Wound Reactors
| Feature | Foil Wound Reactor | Wire-Wound Reactor |
|---|---|---|
| Current Handling | Higher (due to larger surface area) | Limited by wire gauge |
| Skin Effect | Less pronounced (wide conductor) | More significant (round wire) |
| Thermal Performance | Better heat dissipation | Higher hot-spot risk |
| Mechanical Strength | More rigid, vibration-resistant | Less robust |
| Parasitic Capacitance | Lower (controlled winding) | Higher (random winding) |
Applications
● Power electronics and converters
DC/DC converters, inverters (solar/wind), UPS systems
Used as DC link chokes, AC line reactors, and filter inductors
● Renewable energy systems
Solar inverters: Reduces harmonics and improves power quality.
Wind turbines: Acts as grid-side reactors for smooth power injection.
● Industrial motor drives
Variable Frequency Drives (VFDs): Limits inrush current and protects IGBTs.
Harmonic filtering: Mitigates THD in PWM-driven motors.
● HVDC and FACTS devices
Static VAR Compensators (SVCs), STATCOMs: Provides reactive power compensation.
HVDC smoothing reactors: Reduces ripple in DC transmission.
● Electric vehicles and charging stations
Onboard chargers, DC fast chargers: Filters high-frequency noise.

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