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Battery life extending system by using Moter device Back EMF energy

IP.com Disclosure Number: IPCOM000015779D
Original Publication Date: 2002-May-22
Included in the Prior Art Database: 2003-Jun-21

Publishing Venue

IBM

Abstract

Disclosed is a method for Portable PC power saving to reuse from Hard Disk Drive Spindle Motor Back EMF current. The portable PC's top priority required is power saving, because the portable PC's merit is mobility style. But, recently PC has power full CPU and many optional devices. So, Many PC makers study high power battery to use portable PC at mobile condition for long time. But, It is difficult to development right and long life battery. This disclosure is method that is power saving system by using Back EMF current for portable PC with the Hard Disk Drive. In general, a motor generates electrical current when this rotational spin down. This electrical current said "Back EMF current".