AC Helmholtz Coil
Reliable and Customizable Coils for Accurate Magnetic Field Generation
At Xiamen Dexing Magnet Tech. Co., Ltd., we specialize in designing and manufacturing AC Helmholtz Coils that deliver precise, adjustable magnetic fields for research, testing, and calibration purposes. Whether for university laboratories, industrial quality control, or scientific R&D, our coils are built to provide consistent, stable performance you can rely on.
What Is an AC Helmholtz Coil?
An AC Helmholtz Coil is a precisely wound pair (or set) of coils designed to generate a uniform alternating magnetic field within a defined volume. The alternating field can be controlled by adjusting the current and frequency, making it ideal for magnetic sensor calibration, material testing, electromagnetic interference experiments, and scientific research.
Unlike standard coils, Dexing's AC Helmholtz Coils are optimized for frequency response, linearity, and field uniformity, ensuring accuracy even under dynamic conditions.
Product Highlights
✅ Adjustable Magnetic Field Strength – Fine-tune the output field according to experimental needs.
✅ Wide Frequency Range – Suitable for various AC testing applications.
✅ Precision Engineering – Designed with tight tolerances and uniform winding for consistent field distribution.
✅ Customizable Design – Coil diameter, winding material, insulation, and mounting structure can be tailored.
✅ Durable Construction – Built to handle high voltage and current with superior thermal stability.
Applications
Our AC Helmholtz Coils are widely used in:
- Magnetic field generation for research and calibration
- Magnetic sensor testing and development
- Electromagnetic compatibility (EMC) and interference studies
- Material characterization and quality testing
- Induction heating and ultrasonic equipment development
Custom AC Helmholtz Coil Solutions
Every lab or industrial setup is unique - that's why we offer custom coil solutions. Our R&D engineers work closely with clients to deliver precisely what they need, from coil geometry to amplifier integration.
Customization options include:
- Coil diameter and turn count
- Wire material and thickness
- Cooling method (natural or forced)
- Mounting structure (acrylic or aluminum frame)
- Integrated temperature monitoring
Case Study: Xiamen University Application
We recently supplied a 3D AC Helmholtz Coil system to Xiamen University for advanced magnetic research. The system generates a stable and uniform field along X, Y, and Z axes - a perfect example of our engineering capabilities.
| Parameters / Coils | X-Axis | Y-Axis | Z-Axis |
|---|---|---|---|
| Equivalent Diameter | 206 mm | 134 mm | 82 mm |
| Cold State Resistance (±5%) | 0.12 Ω | 5.5 Ω | 3.6 Ω |
| Hot State Resistance @80℃ (±5%) | 0.16 Ω | 7.0 Ω | 4.5 Ω |
| Current | 35 A | 3.5 A | 2.5 A |
| Frequency | 20 Hz | 20 Hz | 20 Hz |
| Magnetic Field | 135 Gs | 135 Gs | 135 Gs |
| Cooling Mode | Natural Air Cooling |
Matching Power Amplifiers
To ensure stable and precise current control, Dexing also provides compatible power amplifiers and signal generators for our AC Helmholtz Coil systems.
Power Amplifier Options
| Model | Output Voltage / Current | Max Power | Frequency Range | Features |
|---|---|---|---|---|
| DXACP3-36 | 36V / 3A | 110W | 0–10kHz | Built-in sine source, digital display, low distortion (<2%) |
| DXACP4-50 | 50V / 4A | 200W | 0–10kHz | High accuracy (<2%), short-circuit protection |
| DXACP40-40 | 40V / 40A | 1600W | 0–10kHz | Industrial-grade performance, strong overload protection |
All amplifiers feature:
- AC input (220V ±10%, 50/60Hz)
- Signal-to-noise ratio >80dB
- Short-circuit and open-circuit protection
- Output voltage and current display (accuracy <2%)
- Operating temperature: 0°C–40°C; humidity 10%–80% RH
Signal Generator Specifications
| Parameter | Specification |
|---|---|
| Input Power | AC 220V ±10%, 50/60Hz |
| Output Frequency | Up to 25MHz |
| Resolution | 14-bit vertical, 200Msa/s |
| Channels | Dual-channel synchronous output |
| Waveforms | Sine, Square, Sawtooth, Pulse, Noise, ECG, Gaussian, Lorentz, Dual Audio (160 types) |
| Interface | USB Host, USB Device, LAN |
| Display | 3.5" TFT LCD screen |
Why Choose Dexing Magnet Tech?
- Over 15 years of experience in magnetic field solutions
- Strong R&D capability for OEM & ODM projects
- Trusted by universities, labs, and manufacturers worldwide
- Comprehensive support, from design to integration
- Factory-direct pricing and strict quality control
Frequently Asked Questions (FAQ)
Q1: What's the difference between an AC and DC Helmholtz Coil?
A1: AC Helmholtz Coils generate an alternating magnetic field suitable for dynamic experiments and sensor testing, while DC Helmholtz Coils provide a steady magnetic field for calibration and static applications.
Q2: Can I customize the coil dimensions and output field strength?
A2: Absolutely. We offer full customization options including coil size, wire material, insulation, and target magnetic field strength.
Q3: What's the maximum frequency supported by your AC Helmholtz Coils?
A3: Our standard models support up to 10 kHz, and custom models can be extended to higher frequencies upon request.
Q4: Do you provide compatible amplifiers and control systems?
A4: Yes, we offer matched power amplifiers and signal generators for precise control and stable performance.
Q5: Can Dexing provide ODM manufacturing for my brand?
A5: Yes, we welcome ODM and distribution partnerships. Our engineering team can design and produce coils under your brand label.
Ready to build your custom AC Helmholtz Coil system?
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