CMC-05

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Common Mode Chokes

A common mode choke (CMC) is an electromagnetic device combining inductors and transformers in an attempt to reduce the amount of unwanted, high-frequency noise produced in a system. This common mode current is generated due to the imbalance between two conductors in an electric circuit, resulting in the appearance of a sinusoidal electric field outside the conductor. The CMC is designed to limit the voltage and current amplitudes of the common mode current, preventing it from causing interference within the device. In this article, we will discuss the application field and working principle of the CMC-05.

Application Field of CMC-05

The CMC-05 is mainly used in the automotive industry as an EMC filter. It is used to reduce the high frequency noise that can be generated within systems such as engines, brakes, and other automotive components. The CMC-05 can also be used in a variety of devices such as computers, audio systems, high speed digital systems, power supplies, and any other device that requires an EMC filter.

Working Principle of CMC-05

The CMC-05 is designed to mitigate common-mode noise and common-mode voltage. Unlike other EMC filters, the CMC-05 incorporates multiple filtering paths. This gives the filter more flexibility, as each path can be tailored for a specific application, thus providing more reliable noise reduction.

A CMC-05 consists of two inductors connected in parallel, and a common-mode transformer. The inductors mitigate the differential-mode noise within the system while the transformer reduces the common-mode noise. The inductors are responsible for the low frequency noise, while the transformer is responsible for the high frequency noise. When the two conductors in the system become imbalanced, the inductors and the transformer both act to reduce the effect of the imbalance on the system.

The CMC-05 also has a special feature called "isolated rang". This feature allows the filter to be used in a variety of applications, such as reducing noise from high power systems, and shielding sensitive components from external noise. This is achieved by splitting the voltage range, thus isolating the filter’s inputs, outputs, and return paths.

In conclusion, the CMC-05 is an effective EMC filter that is suitable for use in a wide range of applications. By combining the inductors and the transformer, the filter is able to reduce noise in both the low and high frequency ranges. Furthermore, the filter’s isolated rang feature provides excellent protection from external noise and high power systems.

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