High Power Components
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Energy TransferNowadays transformers are used in almost every clocked switching power supply. In the majority of applications, the switching frequency is between 10 kHz and 500 kHz. In an output range stretching from several hundred watts up to several kWs, optimized power transformers are applied. SUMIDA AG develops these transformers to match customer specifications taking the latest VDE and UL standards into consideration and based on winding forms with integrated creepage and clearance distances, bobbins with special wire or layer construction in open and potted versions.
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Energy StorageStorage chokes are located in switching power supplies and converter systems for energy storage. When used these chokes have effective current with a frequency-specific peak current applied to them. The choice of core material depends to a major extent on the combined current shape. SUMIDA AG uses here the most varied of core materials such as iron powder, metal alloys and ferrite. The selection of conductor material also plays a major role – depending on the application involved, flat wire, solid wire or litz-wire come into operation.
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Network interference suppressionThe proven asymmetrical interference suppression components from SUMIDA AG are mainly used in the interference suppression of switch mode power supplies. For damping common mode interference, so-called “current compensating chokes” (common mode) are required. These inductivities are primarily based on high permeable cores with two identical windings. SUMIDA AG ensures that for relatively small sizes in customer-specific designs, windings with a smaller self-capacitance are used, which results in higher resonance frequencies.
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Power Factor CorrectionWhen limiting harmonic oscillation of the network on switch mode power supplies and frequency converters, developers tend to use so-called PFC controllers in order to ensure that the sinusoidal system voltage remains distortion free during any current drain. To enable the controller to rectify current shape and compensate for harmonic waves, optimized control chokes are required. SUMIDA AG provides both chokes with special core material as well as coils with ferrite cores and low-loss windings.
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