1. Core Technology: Fluxgate and Closed-Loop Systems
ANC's current sensors are powered by Fluxgate Technology, a type of closed-loop system that uses fluxgate elements as magnetic field detectors to achieve highly precise current measurements.
Fluxgate is an ultra-sensitive magnetic field detection element capable of detecting sub-ppm magnetic field variations, making it ideal for high-precision current measurement.
What is Fluxgate Technology?
Fluxgate Technology is a high-precision sensing method for measuring currents or magnetic fields by detecting variations in magnetic flux. Its core principle involves compensating for magnetic field changes to provide accurate readings.
Working Principle: A primary current (Ip) flowing through a toroidal core generates a magnetic field that interacts with the fluxgate element.
·An integrator within the fluxgate produces a secondary current (Is) to compensate for changes caused by the primary current's magnetic field. This ensures a fixed ratio between the primary (Np) and secondary (Ns) windings.
·The closed-loop compensation mechanism minimizes magnetic drift and external interference, ensuring high-accuracy measurements.
Measurement Process
Low Frequency (DC to 100 Hz): Fluxgate sensors detect extremely weak magnetic field changes, achieving sub-ppm accuracy by adjusting the secondary current (Is) to precisely compensate for the magnetic field generated by the primary current (Ip).
High Frequency (above 100 Hz): At higher frequencies, the feedback winding (Nfb) senses magnetic field changes and maintains precision through continuous signal compensation.
Key Advantages:
High Accuracy: Sub-ppm precision suitable for research, medical equipment (e.g., MRI), and other critical applications.
Excellent Linearity: Linearity errors typically below 1 ppm, ideal for high-precision current or magnetic field measurement.
Stability: Outstanding long-term stability with drift less than 1 ppm/year, perfect for extended use in scientific and medical scenarios.
Environmental Adaptability: Designed to withstand temperature fluctuations and electromagnetic interference, ensuring reliability in harsh conditions.
Compared to traditional Hall effect sensors, fluxgate technology offers higher precision and superior temperature stability. It also outperforms induction-based sensors in frequency response and error reduction, especially in high-frequency measurements.
2. Key Performance Parameters
Linearity: ANC sensors feature ultra-low linear error (1-3 ppm), ensuring exceptional measurement accuracy.
Stability: Minimal long-term drift (<1 ppm/year), suitable for high-stability environments like research and medical applications.
Output Options: Supports both voltage and current outputs, offering flexibility for various measurement systems.
Wide Bandwidth: Covers frequencies from DC to several hundred kHz, enabling both DC and AC measurements.
3. Applications
Electric Vehicles: Ensures accurate battery management, motor control, and energy efficiency.
Medical and Scientific Research: Used in MRI systems and particle accelerators requiring ultra-high precision.
Railway Systems: Monitors traction systems and power supply for safe and efficient train operations.
Smart Grids: Enables precise monitoring, fault detection, and energy optimization for sustainable and intelligent power grids.
High-Precision Current Measurement: Ideal for power analyzers and high-accuracy power measurements.
Extreme Environment Adaptability: Operates within -40°C to +85°C, suitable for complex industrial and outdoor conditions.
4. Typical Product Series
ANC-M Series: Covers a measurement range of 60A to 20,000A with excellent linearity (as low as 2 ppm) and minimal long-term drift. Designed for high-precision DC and AC measurement applications, with customization options available.
Conclusion
ANC's fluxgate current sensors stand out with their exceptional precision, stability, and wide bandwidth response. They are the ideal solution for applications in scientific research, medical equipment, renewable energy, and more. By leveraging advanced technology to detect and compensate for magnetic field changes, ANC delivers sub-ppm accuracy, positioning itself as a leader in high-precision current sensing solutions.
