What is a Rogowski Coil?03-10, 2025

A Rogowski coil is a device that measures current by creating an electromagnetic field around a wire. It consists of multiple spiral coils that work according to Ampere's law and Faraday's law of electromagnetic induction. Rogowski coils are widely used in electronic instruments, power systems, communication equipment and industrial automation, and are precise and reliable.
1.Definition
A Rogowski coil, also known as a current sensor or current transformer, is a device for measuring current. It uses Ampere's law and Faraday's law of electromagnetic induction to measure current by generating an electromagnetic field in a wire. A Rogowski coil usually consists of one or more spiral coils wound around an iron core, which can enhance the strength of the magnetic field and conduct current.
2.Principle
When current flows through the wire of the Rogowski coil, the wire generates a magnetic field. According to Ampere's law, the strength of the magnetic field formed by the current around the wire is proportional to the current strength. The coil windings of the Rogowski coil cause the magnetic field to induce electromotive force, and according to Faraday's law of electromagnetic induction, the electromotive force is proportional to the rate of change of the magnetic flux. By measuring the induced electromotive force, the magnitude of the current can be indirectly measured.
3.Application
Rogowski coils are widely used in electronic instruments, power systems, communication equipment, and industrial automation. In electronic instruments, Rogowski coils are often used to measure the magnitude of current and provide data support for the normal operation of the circuit. In power systems, Rogowski coils are used for important tasks such as analyzing power loads and monitoring grid faults. In communication equipment, Rogowski coils are used for sensor work to help monitor and control current. In industrial automation, Rogowski coils are used to control current, protect equipment, and achieve automated operations.
Rogowski coil is a device used to measure current. It generates an electromagnetic field to induce current and works based on Ampere's law and Faraday's law of electromagnetic induction. It is widely used in electronic instruments, power systems, communication equipment, industrial automation and other fields, and is accurate and reliable. Mastering the principles and applications of Rogowski coils will help improve the professional skills of electronic engineers and promote the optimization and development of electronic equipment.