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Technical Paper

Electromagnetic Compatibility (EMC) in the Off-Highway Vehicle: Part IV Electronic Design for EMC

1993-09-01
932429
Electromagnetic compatibility (EMC) design considerations have a vital role in the proper functioning of the electronic circuits and systems of a modern off-highway vehicle (OHV). Careful planning is needed in developing the electronic systems that operate the various functions and tasks on these vehicles. Incorporation of EMC in a system design gives that system the quality of reliability; that is, the system will have reduced emissions and be less susceptible to radiated and conducted electromagnetic energy. This paper provides ideas, concepts, and guidelines that the designer of OHV control circuitry can use for incorporation of EMC at the beginning of a design project.
Technical Paper

Electromagnetic Compatibility in the Off-Highway Vehicle Part III: Electromagnetic Emissions (EME)

1992-09-01
921654
Electromagnetic emissions (EME) from vehicles and their effect on broadcast radio and television were studied as early as 1944. Their original effect was significantly reduced by the early 1960s. Today, ignition noise (broadband) and vehicular micro-processor-controlled system noise (narrowband) are interfering with Land Mobile (two-way) communication services and other devices such as computers. Two SAE test methods, J551 and J1816, are used to measure this EME. Under development are methods to measure conducted EME on vehicle signal wiring and power input leads. This paper discusses EME measurement methods, provides insight into the sources of EME problems, and gives information on the test instrumentation used to make these measurements. This paper is the third in a series of papers on electromagnetic compatibility (EMC) in the off-highway vehicle. The first paper was an overview of a complete EMC program with discussion of several important segments.
Technical Paper

Electromagnetic Compatibility in the Off-Highway Vehicle

1991-09-01
911791
The key words in the marketplace for off-highway vehicles are durability, performance, and efficiency. A manufacturer of these vehicles recognizes that one way to successfully address these needs is by a well thought through electronics design. With the computer sophistication now being incorporated into off-highway vehicles, engineers must work closely to assure electromagnetic compatibility (EMC) of the entire system. A properly established EMC program extending from concept to final design will support each of a product's specified operations and still function as an integrated whole. This paper describes the process for designing the EMC for an off-highway vehicle.
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