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Active vs Passive EMI filtering

  • Posted by doEEEt Media Group
  • On June 23, 2021
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Active EMI filtering (AEF) technology, a relatively new approach to EMI filtering, attenuates EMI and enables engineers to achieve a significant reduction in passive filter size and cost, along with improved EMI performance. To illustrate the key benefits that AEF can offer in terms of EMI performance and space savings, in this technical article I’ll review results from an automotive synchronous buck controller design with integrated AEF functionality.
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EMC / EMI Testing of SMALL SATS

  • Posted by doEEEt Media Group
  • On June 2, 2021
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EMC tests are performed in an anechoic chamber for radiated emission/immunity (to avoid reflections) and using grounded planes (for conducted emission/immunity). An anechoic chamber is a room designed to absorb reflections of either sound or electromagnetic waves completely. They are also often isolated from waves entering their surroundings. This combination means that a person or detector exclusively hears direct sounds (no reverberant sounds), in effect simulating being inside an infinitely large room.
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Equipment level testing for New Space and SMALL SATS Projects

  • Posted by doEEEt Media Group
  • On June 2, 2021
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New Space projects require “traditional” Space projects equipment-level testing. Typical testing campaigns for any kind of satellite or subsystem include: Vibration, Shock Response Spectrum (SRS), Electromagnetic Compatibility (EMC) / EMI, Thermal vacuum (TVAC), TID, Other more specific tests needed for subsystems may include: Optical tests, Electrostatic Discharges (ESD), Materials tests (mechanical, electrical, cleanliness), Magnetic tests
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Compact EMI-Suppression and DC-Link Film Capacitors

  • Posted by Kemet Electronic Corporation
  • On May 19, 2021
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KEMET’s new space-saving film capacitor’s designs, the C4AU DC-link power box and the R52 and R53 EMI X2 suppression capacitors are first-to-market solutions that meet the needs of today’s most challenging applications. Extensively tested for high reliability in harsh environments, the new KEMET’s miniaturized products offer an ultra-high capacitance in a compact package for more board savings and lower application costs for engineers.
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TDK Announces Miniaturized Common-Mode EMC Suppression Chokes

  • Posted by doEEEt Media Group
  • On May 4, 2021
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Automotive LANs are roughly categorized into 4 systems such as body, safety, powertrain and multimedia/information, and telecommunications. This product supporting CAN and CAN-FD enables a fivefold data transmission speed of 5 Mbps. Currently, CAN is the most widely used standard for body and other systems, keeping a maximum data transmission speed of 1 Mbps.
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Varistors for Automotive Ethernet

  • Posted by doEEEt Media Group
  • On May 4, 2021
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AVX Varistors AVX began shipping a selection of multi-layer varistors (MLV) in 1988 and entered the automotive supply chain in 2001. AVX has adopted bismuth oxide (Bi2O3)-based construction for its high reliability and has resulted in zero defective parts per million quality record since 2008. In addition, these devices meet the strict automotive quality standards (AEC-Q200, for example) and as such, are an ideal choice for protecting automotive Ethernet circuits.
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Compact Current-Compensated Ring Core Chokes

  • Posted by doEEEt Media Group
  • On March 24, 2021
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These chokes are available in three sizes with current handling capacities between 10 A and 17 A, and with a rated voltage of 250 V AC (50/60 Hz). Depending on the type, the inductance value is between 1.0 mH and 6.25 mH. The plastic material of the base plate and spacer in the middle of the ring core conforms with UL 94 V-0, and the highest CTI value of >600.
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ALTER TECHNOLOGY is a quality driven company providing procurement, engineering and test services for electronic components and systems, within space and harsh environment markets.
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