Rogowski Coil Series
I. Overview: The Rogowski coil, also referred to as the Rockwell coil or current-measuring coil, is a toroidal coil evenly wound around a non-ferromagnetic material. Its output signal represents the derivative of the current with respect to time. By integrating the output voltage signal through an appropriate circuit, the original current waveform can be accurately reconstructed. This type of coil provides a non-invasive method for measuring current without the need for direct electrical contact.
II. Structural Features: One of the key advantages of the Rogowski coil is its lack of ferromagnetic materials, which eliminates hysteresis effects and ensures virtually zero phase error. Since there's no magnetic saturation, the measurement range can span from a few amperes to hundreds of kiloamperes. The design is simple yet robust, allowing for the non-contact measurement of currents. Additionally, the frequency response bandwidth extends from 0.1 Hz to 1 MHz, significantly outperforming traditional iron-core transformers in terms of versatility and reliability. These features make Rogowski coils ideal for applications requiring precise measurements, such as relay protection, thyristor rectification, variable frequency drives, and resistance welding, where signal distortion is often a concern.
III. Electrical Parameters:
- Input: 5 A to 100 kA
- Output: 0~20 mA, 0~5 V, 0~10 V (customizable)
- Accuracy: 0.5% to 1%
- Frequency Range: 0 to 3 MHz
The Rogowski coil’s ability to provide real-time measurements with rapid response times, coupled with its immunity to saturation and negligible phase error, makes it indispensable in modern industrial and scientific applications. Its compact size, lightweight construction, and eco-friendly design further enhance its appeal, ensuring compliance with stringent safety and environmental standards. Whether used for monitoring large-scale industrial processes or sensitive electronic systems, Rogowski coils deliver unparalleled performance across a wide spectrum of operational conditions.
In summary, the Rogowski coil series combines advanced technology with practical functionality, making it an essential tool for engineers and technicians who require accurate, reliable, and efficient current measurement solutions. With its adaptability to diverse environments and applications, this coil series continues to set new benchmarks in the field of electrical instrumentation.
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