Articles

MEMS-based power disconnect for 42-V automotive power systems

[+] Author Affiliations
Henry K. Chu

University of Toronto, Department of Mechanical and Industrial Engineering, 5 King’s College Road, Toronto, Ontario, Canada M5S 3G8

James K. Mills

University of Toronto, Department of Mechanical and Industrial Engineering, 5 King’s College Road, Toronto, Ontario, Canada M5S 3G8

William L. Cleghorn

University of Toronto, Department of Mechanical and Industrial Engineering, 5 King’s College Road, Toronto, Ontario, Canada M5S 3G8

J. Micro/Nanolith. MEMS MOEMS. 7(1), 013010 (March 20, 2008). doi:10.1117/1.2896107
History: Received July 31, 2007; Accepted December 04, 2007; Published March 20, 2008
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We present the design of a micro-electro-mechanical-system (MEMS)–based power disconnect for use with the proposed 42-V automotive power systems. High-voltage power systems are prone to arcing, which occurs during power disconnections. The high arcing current may lead to severe damage on the systems and may expose electric shock hazards to humans. The objective of the MEMS-based power disconnect we propose is to eliminate arcing occurrence in the systems. To eliminate arcing, one alternative is to electronically terminate the power supply to the system prior to the physical disconnection. The integrated MEMS force sensor on the power disconnect will be activated as a service technician disconnects the connector. The power supply to the system will be electronically shut off to prevent arcing during the physical interruption. The MEMS force sensor on the disconnect has an overall dimension of 3600μm×1000μm×10μm and is fabricated with the Micragem fabrication process. A displacement reduction mechanism is incorporated into the sensor design to increase the sensitivity of the force sensor. Results show that the sensor is capable of measuring a maximum force input of 10.7mN, resulting from a 20-μm displacement on the sensing structure.

© 2008 Society of Photo-Optical Instrumentation Engineers

Citation

Henry K. Chu ; James K. Mills and William L. Cleghorn
"MEMS-based power disconnect for 42-V automotive power systems", J. Micro/Nanolith. MEMS MOEMS. 7(1), 013010 (March 20, 2008). ; http://dx.doi.org/10.1117/1.2896107


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