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Performance Levels and Methods of Measurement of Electromagnetic Compatibility of Vehicles, Boats (up to 15 m), and Machines (16.6 Hz to 18 GHz)

Electromagnetic Compatibility (EMC) Standards
  • Ground Vehicle Standard
  • J551/1_202001
  • Current
Published 2020-01-10 by SAE International in United States

This SAE Standard covers the measurement of radio frequency radiated emissions and immunity. Each part details the requirements for a specific type of electromagnetic compatibility (EMC) test and the applicable frequency range of the test method.

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Interface Standard, Airborne EO/IR Systems, Electrical

AS-1C Avionic Subsystems Committee
  • Aerospace Standard
  • AS6129A
  • Current
Published 2019-11-19 by SAE International in United States
This standard defines a generic set of electrical interfaces between a host aircraft (“platform”) and an electro-optic/infrared (EO/IR) sensor. This includes connectors, cabling, fiber optics, signals, and power.
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Research on Electromagnetic Compatibility for Wireless Charging System of Electric Vehicles

CATARC-Li Jiang, Haiming Liu, Yifu Ding, Xu Zhang, Yue Zhang
Published 2019-11-04 by SAE International in United States
Currently, there are no specific standards on electromagnetic compatibility (EMC) test for wireless charging system of electric vehicles (EVs). However, the EMC test items have been summarized in some international standards. And the national standard is under developing. In order to support the formulation of corresponding national standards and regulations, promote the rapid development of EVs industry and support the implementation of the national strategy of new energy vehicles (NEVs) and intelligent network vehicle, we carry out the EMC test for wireless charging systems. In this paper, the wireless charging system of EVs is taken as the research object, which can also been called equipment under test (EUT). Firstly, an introduction of the research status was summarized. And then, the influence parameters such as output power and offset are analyzed. Based on the analysis, the EMC test was implemented to evaluate the EMC performance of EUT. Finally, the relevant research results will provide support for the formulation of national standard.
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Research on Test Method for Shielding Effectiveness to Cable of Vehicles

CATARC-Li Jiang, Xichen Chen, Haiming Liu, Zaiyuan Wu, Yun Wang
Published 2019-11-04 by SAE International in United States
With the development of electric vehicles (EVs), hybrid electric vehicles (HEVs) and fuel cell vehicles (FCVS), high voltage and large-current are applied to cables. Therefore, it is important to avoid electromagnetic compatibility (EMC) problems of cables, and a measurement methods is necessary for the shielding effectiveness of shielding cables. This paper discusses the existing test methods of cable shielding effectiveness and summarizes the main problems and deficiencies. Then, according to the practical requirements of high voltage cable testing, the direct injection method based on the national standard GB/T 18655-2018 (modified international standard CISPR 25) is proposed. The test method is verified by constructing a practical test platform. The test result show that the platform built can meet the test requirements of the new energy vehicles (NEVs) GB/T 18387 test frequency band 150k~30MHz, and can also meet the test requirements of the 150k~108MHz frequency band of the key component conducted emission of NEVs.
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Medical Power Supplies and Electromagnetic Interference

  • Magazine Article
  • TBMG-35510
Published 2019-11-01 by Tech Briefs Media Group in United States

One of the challenges of using commercial power supplies in medical instruments is electromagnetic interference (EMI). Commercial power supplies often list “meets Class B” for EMI, but this is often with conditions that are completely unrealistic or impossible for a medical system designer to meet. If designers assume electromagnetic compliance (EMC) in the power supply, they may find themselves chasing EMI problems and making last-minute system design changes, such as adding filtered power entry modules, shielding, and other compensation, before they can launch the product. This article discusses critical details to look for in commercial medical power supplies with respect to EMI. It also explores why it can be advantageous to consider a custom design to meet EMC as well as cost, performance, and lead time requirements.

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Aircraft Electrical Installations

AE-8A Elec Wiring and Fiber Optic Interconnect Sys Install
  • Aerospace Standard
  • ARP4404C
  • Current
Published 2019-09-19 by SAE International in United States
It is the purpose of this document to present design recommendations that will provide a basis for satisfactory and safe electrical installations in transport aircraft. This document is not intended to be a complete electrical installation design handbook. However, the requirements for safety extend so thoroughly throughout the electric systems that few areas of the installation are untouched by the document. It is recognized that individual circumstances may alter the details of any design. It is, therefore, important that this document not be considered mandatory but be used as a guide to good electrical application and installation design. Transport aircraft electric systems have rapidly increased in importance over a number of years until they are now used for many functions necessary to the successful operation of the aircraft. An ever increasing number of these functions are critical to the safety of the aircraft and its occupants. The greatly increased power available in electric systems is another factor in aircraft safety. These considerations make it essential that aircraft electrical design practices be carefully considered from the…
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10 Things to Consider When Specifying Small Metal and Plastic Enclosures

  • Magazine Article
  • TBMG-35122
Published 2019-09-01 by Tech Briefs Media Group in United States

Your new industrial electronic product has been designed and the board components specified. It has been prototyped, either on a development board to check functionality and performance or laid out on a final PCB design. It has been debugged, tested, tweaked, tested again, and finally signed off for production. So far, so good. Now all that has to be done is to decide on the enclosure. In the ideal world, the enclosure would have been selected far earlier in the process so that, in particular, the size constraints of the PCB would be known. In the real world, the first question is normally, “What size box do I need?”

Using Monolithic Filters to Address EMI in Medical Devices

  • Magazine Article
  • TBMG-35100
Published 2019-09-01 by Tech Briefs Media Group in United States

Many factors are conspiring to increase the amount of “noise” or interference that can disturb the functionality and even damage electronic devices, starting with the sheer number used in our vicinity at any given time. Today’s Wi-Fi or Bluetooth-enabled medical instruments and even medical implants provide a prime example.

The Many Uses of Inductive Position Sensors in the IIoT

  • Magazine Article
  • TBMG-35198
Published 2019-09-01 by Tech Briefs Media Group in United States

The IIoT is all about communication of information concerning the status of devices and being able to control them remotely. This imposes a whole new set of requirements on sensors. They have to be designed to be able to interface well with electronics and computers, with all of the complications of that, such as EMC — sensitivity to, and generation of, noise and interference. This can only be achieved with intelligent sensors. We interviewed K. Mark Smith, Ph.D., Senior Product Manager, Sensors, Microchip Technology, (Chandler, AZ) about the role of inductive position sensors in the IIoT.

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Wiring Aerospace Vehicle

AE-8A Elec Wiring and Fiber Optic Interconnect Sys Install
  • Aerospace Standard
  • AS50881G
  • Current
Published 2019-08-06 by SAE International in United States
This specification covers all aspects in Electrical Wiring Interconnection Systems (EWIS) from the selection through installation of wiring and wiring devices and optical cabling and termination devices used in aerospace vehicles. Aerospace vehicles include manned and unmanned airplanes, helicopters, lighter-than-air vehicles, missiles, and external pods.
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