Apr 13,2023
Working principle of three phase common mode choke coil
A three-phase common mode choke coil is an electrical component used in power systems to reduce electromagnetic interference (EMI) and improve the quality of the power supply.
It consists of a magnetic core around which multiple coils are wound, with each coil carrying a single phase of the three-phase power supply.
The working principle of a common mode choke is based on the fact that current flowing through the conductors generates a magnetic field around them. When two or more conductors are placed close to each other, their magnetic fields interact, which can result in unwanted electromagnetic interference (EMI).
The common mode choke coil operates by creating an opposing magnetic field that cancels out the EMI. The multiple coils in the common mode choke are wound in such a way that the currents in each phase of the power supply flow in opposite directions. This creates a magnetic field around each coil that cancels out the magnetic fields of the other coils.
As a result, any EMI generated by the current flowing through the conductors is significantly reduced or eliminated. This helps to improve the overall quality of the power supply and reduce the risk of interference with other electrical equipment.
In summary, the three-phase common mode choke coil works by generating opposing magnetic fields that cancel out unwanted EMI generated by the current flowing through the conductors.
