Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Analysis of complex waves
Reexamination Certificate
2006-10-10
2006-10-10
Nguyen, Vincent Q. (Department: 2858)
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Analysis of complex waves
C318S801000, C318S803000
Reexamination Certificate
active
07119530
ABSTRACT:
A method and system for obtaining motor current measurements from a DC bus current of an inverter that drives a pulse width modulated electric machine is disclosed. The method may include sensing a DC bus current in a sensor located on a bus of an inverter; sampling the DC bus current via an analog to digital converter wherein the sampling is controlled by sampling timing that is based on a pulse width modulation timing of the inverter; and determining three AC phase currents of the motor from the sampled DC bus current.
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Switched Reluctance Motor Drives (6 pages), http://www.fleadh.co.uk/srm.htm.
Fisher Paul M.
Mir Sayeed A.
Shafer Daniel W.
Underwood Samuel J.
Delphi Technologies Inc.
Nguyen Vincent Q.
Smith Michael D.
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