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As our electrical devices become more power hungry, engineers have to design more efficient, high power conversion systems.

This kind of system is preferred, as it takes in readily available AC power from the grid and converts it into DC power for motors, batteries, and other applications. Considerations about its size, weight, energy efficiency, and cost all need to be taken into consideration when designing a power converter. There are four stages in a power conversion: EMI Filter, Power Factor Correction, DC-DC Conversion, and Output Filtering.

This product is ideal for the EMI Filter.

Shown above is the architecture for a basic power conversion system that is supplied by 3-Phase AC power. Similar versions of this architecture would be used in a single-phase application. Using this 3-phase architecture allows for a higher efficiency system.

The first stage of the power conversion is the EMI filter. During this stage AC power is filtered to remove any unwanted noise from the typical AC sine wave that is expected. This noise is caused by a wide variety of different things including electric motors, cellular networks, transformers, and other variables traveling throughout the grid. In order to protect the other each power conversion stage, the EMI filter limits voltage and current spikes that can be harmful. Most commonly these filters are made up of X & Y Safety Capacitors, Common Mode Chokes, circuit protection devices, & AC Harmonic Filter Capacitors. Many household devices contain EMI filters internally similar to this design (typically single-phase variations) in order to protect the components and the user. Shown in the figure below is the waveform before and after the EMI Filter. This can reduce the amount of filtering needed in further stages.

To learn more about YAGEO Groups Safety Certified Film Capacitors.

Uniquely, YAGEO Group offers the entire portfolio of passive components required in designing power conversion systems.

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