Electrical system for a computer cart
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United States of America Patent
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Dec 23, 2014
Grant Date -
Nov 3, 2011
app pub date -
Jul 15, 2011
filing date -
Jan 19, 2009
priority date (Note) -
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Abstract
An electrical system for a computer cart enables power to be diverted between electrical channels within the cart using an intelligent round robin charging scheme. All power may be diverted to individual channels one at a time for short charging intervals. When a selected primary channel does not require all available power within the cart, excess power is provided to a secondary channel. All three channels may likewise share power if excess is available. Relays are used to allow power to be controlled to the individual channels. Current sensors on each channel sense an amount of current used by the channel. The output of the current sensor is digitized and integrated to determine how much current is being used by the channel. The current is used by the control to detect uncharged laptops and to selectively divert power between channels to optimize use of power within the computer cart.
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