Page 50 - 2021 High-Reliability, Harsh Environment Connectivity eBook

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5. Dealing with skin effect helps minimize opposing eddy currents to reduce the effective resistance of conductors at higher frequencies.
When determining proper shielding and filtering for electromagnetic compatibility (EMC), designers must account for skin effect — the tendency of AC to flow close to the surface of a conductor. Skin effect is the result of eddy currents induced by the changing magnetic fields of alternating current and is a factor in nearly every AC design. PCB traces and other elements of AC power circuits can be designed to negate skin effect, but expert planning is required.
6. Managing size and weight constraints in trim aircraft loads calls for the selection of smaller and lighter components.
Components employed in high-power electrical energy storage and management in industrial applications tend to be hefty. Fortunately for aircraft, high-efficiency relays and contactors are available that can handle higher voltage and amperage within a compact footprint. For example, KILOVAC high-voltage relays and contactors from TE Connectivity (TE) offer voltage ratings up to 70kV DC and current ratings up to 1,000 Amps (A) while providing a useful size-to-power ratio. Compact cables, terminations, and connectors are also available to meet demanding size, weight, and power (SWaP) requirements.
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» Designed for harsh environments and loads, TE Connectivity’s KILOVAC CAP120 contactor offers exceptional performance for small and light devices. A reduced-size version of the popular MAP and CAP series contactors, the CAP120 contactor’s small size and light weight opens up new application possibilities for 150A/600VDC devices. High break levels — 1,000A at 400VDC and 600A at 600VDC — help increase system flexibility and reliability. CAP120 contactors also provide reliable and long-lasting performance in UAM applications.