Title: LSV2 EMI Measurement and Mitigation Sponsor: Prof. Herb Hess, ECE 208-885-4341 Tel: Email: hhess@uidaho.edu Project Description: The US Navy Acoustic Research Detachment at Bayview, Idaho, has the mission to reduce detectable and identifiable signals and noise produced by surface warships and submarines. This includes not only audible signals, the primary focus of their work, but it also includes electromagnetic signals and noise that radiate from these vessels. A source of this noise are the power electronic energy converters that drive the vessel’s propulsion motors. Electromagnetic radiation within motor drive circuitry comes from the rapid high voltage switching of power transistors and diodes. This radiation can be detected outside the ship with appropriate listening equipment. If the vessel’s location or mission is detected, the vessel may be targeted and attacked. This project is intended to reduce the likelihood of such attacks. For this project, the senior design team will develop an electromagnetic interference (EMI) measurement and characterization system which can effectively measure EMI radiation from submarine mounted systems. Students will use EMI measurement and characterization systems to assess EMI from an existing Large Scale Vehicle (LSV2) having inverters that produce 120VAC power from 400VDC input. Students will provide recommendations for reducing radiating EMI in the LSV2 Auxiliary Power System. Specific areas of interest include applying Retroactive Noise Mitigation Techniques of OEM Systems. These include proposing filters for specific frequencies and locations, revising cable locations and paths within the vessel, improving the motor drive’s enclosure without substantially adding weight to the vessel, and other innovative noise mitigation techniques. The team should show how these changes achieve EMI improvement with minimal cost and impact to the vessel’s operation. Successful projects may become eligible for thesis research in graduate school. Deliverables include the following:
Title: LSV2 EMI Measurement and Mitigation Sponsor: Prof. Herb Hess, ECE Tel: 208-885-4341 Email: hhess@uidaho.edu Project Description: The US Navy Acoustic Research Detachment at Bayview, Idaho, has the mission to reduce detectable and identifiable signals and noise produced by surface warships and submarines. This includes not only audible signals, the primary focus of their work, but it also includes electromagnetic signals and noise that radiate from these vessels. A source of this noise are the power electronic energy converters that drive the vessel’s propulsion motors. Electromagnetic radiation within motor drive circuitry comes from the rapid high voltage switching of power transistors and diodes. This radiation can be detected outside the ship with appropriate listening equipment. If the vessel’s location or mission is detected, the vessel may be targeted and attacked. This project is intended to reduce the likelihood of such attacks. For this project, the senior design team will develop an electromagnetic interference (EMI) measurement and characterization system which can effectively measure EMI radiation from submarine mounted systems. Students will use EMI measurement and characterization systems to assess EMI from an existing Large Scale Vehicle (LSV2) having inverters that produce 120VAC power from 400VDC input. Students will provide recommendations for reducing radiating EMI in the LSV2 Auxiliary Power System. Specific areas of interest include applying Retroactive Noise Mitigation Techniques of OEM Systems. These include proposing filters for specific frequencies and locations, revising cable locations and paths within the vessel, improving the motor drive’s enclosure without substantially adding weight to the vessel, and other innovative noise mitigation techniques. The team should show how these changes achieve EMI improvement with minimal cost and impact to the vessel’s operation. Successful projects may become eligible for thesis research in graduate school. Deliverables include the following:
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