Control device optimizing computing input sample of data with discrete fourier transform algorithm
US7734673B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 21, 2005 |
| Grant date | Jun 8, 2010 |
| Priority date | — |
| Expiry date | Sep 5, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F17/141
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An automatic control device having an input for inputting measured values of cyclic voltage and/or current; computing device for computing a parameter based on said values of voltage and/or current, and for comparing the computed parameter against a predefined condition; and initiating device for initiating a control function in response to the parameter meeting the predefined condition. The input of the control device is arranged to input a predefined number of samples per one cycle; and the computing device is arranged to compute the parameter with a discrete Fourier transform algorithm optimized based on fixed coefficients related to the predefined number of samples per cycle. An exemplary control device and corresponding control method can provide a significantly faster response time than the earlier general programmed solutions without increasing the related costs as much as the known digital signal processors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.