Title:
電力計算パラメータを取得するための方法及び装置
Document Type and Number:
Japanese Patent JP2005536722
Kind Code:
A
Abstract:
A method and apparatus for obtaining power computation parameters is presented. Accurate computation of power requires multiplying voltage and current at the same instant of time and integrating the results over time. The present invention provides a method of using a single Analog to Digital Converter to convert both voltage and current for all the phases of any electrical system and then digitally compensating for the phase error caused by the non-simultaneous sampling of the current and voltage signals. The compensating filter could be implemented as a simple interpolator, an all-pass filter, or a combination of both. A single multiplexer is used to select which signal is processed by the Analog to Digital Converter. By scheduling and converting the voltage and analog signals one at a time, potential for crosstalk is significantly reduced, power requirement is reduced, and die size requirement is reduced.
Inventors:
White, bart
Application Number:
JP2004529118A
Publication Date:
December 02, 2005
Filing Date:
August 19, 2003
Export Citation:
Assignee:
DTK Semiconductor Corporation
International Classes:
G01R11/00; G01R21/133; (IPC1-7): G01R11/00
Attorney, Agent or Firm:
Masaki Yamakawa
Shigeki Yamakawa
Shigeki Yamakawa