US 7,590,499 B2
Recording and conveying energy consumption and power information
Wai-leung Ha, Pokfulam (Hong Kong Special Administrative Region of the People's Republic of China, The); and Kairy Kai Lei, Shen Zhen (China)
Assigned to Computime, Ltd., Hong Kong (Hong Kong Special Administrative Region of the People's Republic of China, The)
Filed on Jun. 28, 2007, as Appl. No. 11/770,054.
Application 11/770054 is a continuation in part of application No. 11/427161, filed on Jun. 28, 2006.
Prior Publication US 2008/0001595 A1, Jan. 03, 2008
Int. Cl. G01R 21/00 (2006.01)
U.S. Cl. 702—60  [702/46; 702/57; 702/61; 702/64; 702/65; 702/99; 702/187; 702/188; 705/412; 324/103 R; 324/104; 324/105; 324/114; 324/116; 324/158.1; 340/3.1; 340/3.3; 340/3.32; 340/500; 340/540; 340/635; 340/637; 340/653; 340/657; 340/658; 340/659; 340/660; 340/664; 340/679; 340/870.01; 340/870.02; 340/870.07; 340/870.16; 700/17; 700/83; 700/86; 700/286; 700/291; 700/297; 713/1; 713/2; 713/10] 10 Claims
OG exemplary drawing
 
1. An apparatus comprising:
an energy sensor configured to measure an incremental energy value consumed by a variable speed device during an incremental time duration;
a network interface configured to interface to a communications network; and
a processor configured to:
obtain the incremental energy value;
accumulate an energy usage measurement in accordance with the incremental energy value;
provide requested information about energy consumption of the variable speed device in response to a request from a network controller through the network interface; and
adjust the energy usage measurement in accordance with the requested information;
an array configured to provide at least one control signal to the variable speed device to control a speed of the variable speed device; and
a pulse width modulation controller configured to control a pulse width of the at least one control signal in accordance with a temperature difference and a feedback signal from the variable speed device, the feedback signal being indicative of a difference between a predetermined target device speed and an actual device speed.