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This SAE Standard covers the measurement of broadband electromagnetic radiation over the frequency range of 30 to 1000 MHz from a vehicle or other device powered by an internal combustion engine or electric motor. Operation of all engines (main and auxiliary) of a vehicle or device is included. All equipment normally operating when the engine is running is also included except operator-controlled equipment, which is excluded. The recommended level applies only to complete vehicles or devices in their final manufactured form. Vehicle mounted rectifiers used for battery charging in electric vehicles are included in this document when operated in their charging mode.
This SAE Standard covers the measurement of Impulse Electric Field Strength radiated over the frequency range of 201000 MHz from a vehicle or other device powered by an internal combustion engine or electric motor. Operation of all engines (main and auxiliary) on a vehicle or other device is included. All equipment normally operating when the engine is running is also included, except operator-controlled equipment, which is excluded. The recommended level applies only to complete vehicles or devices in their final manufactured form. Vehicle mounted rectifiers used for battery charging in electric vehicles are included in this specification when operated in their charging mode.
This SAE Recommended Practice specifies measurement procedures and performance levels for magnetic and electric field emissions and conducted power mains emissions over the frequency range 150 kHz to 30 MHz, for vehicles incorporating electric propulsion systems, e.g., battery, hybrid, or plug-in hybrid electric vehicles.Conducted emission measurements in this document are applicable only to battery-charging systems which utilize a switching frequency above 9 kHz, are mounted on the vehicle, and whose power is transferred by metallic conductors. Conducted emission requirements apply only during charging of the batteries from AC power lines.Conducted and radiated emissions measurements of battery-charging systems that use an induction power coupling device are not covered by this document.The measurement of electromagnetic disturbances for frequencies from 30 MHz to 1000 MHz is covered in CISPR 12. This revision of SAE J551 includes numerous technical changes. The conducted limits are re-aligned with current FCC limits, and the radiated emission limits now begin at 150 kHz, corresponding to the CISPR/D decision regarding frequency coverage in CISPR 25. Limit scaling in the near field (Appendix A) now utilizes the 60dB/decade distance relationship due to measurement of both E and H fields, but the vertical H field measurement is deleted due to its typically low magnitude, poor far field radiation efficiency, and lack of receiving systems using this field component. In recognition of the changing nature of electric vehicles (which primarily utilized DC brush motors when the limits were proposed in 1983), the scope has been expanded and ANSI C63.12 limits with average detection are added, while the impulsive bandwidth normalization has been removed from the expression of fields and limits. The emission maximizing procedure has been updated based on experience acquired since the initial procedure was developed.
The test procedures and performance levels in this SAE Recommended Practice cover the measurement of magnetic and electric field strengths over the frequency range 9 kHz to 30 MHz and conducted emissions over the frequency range of 450 kHz to 30 MHz .Conducted emission measurements in this document are applicable only to battery-charging systems which utilize a switching frequency above 9 KHz, are mounted on the vehicle, and whose power is transferred by metallic conductors. Conducted emission requirements apply only during charging of the batteries from AC power lines.Conducted and radiated emissions measurements of battery-charging systems that use an induction power coupling device are not covered by this document.The measurement of electromagnetic disturbances for frequencies from 30 MHz to 1000 MHz and narrowband electromagnetic disturbances for frequencies from 150 KHz to 30 MHz are covered in SAE J551-2.
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