Patent Number: 6,166,930

Title: Reduced common voltage in a DC matrix converter

Abstract: A DC matrix converter having six forward current conducting power switches and six reverse current conducting power switches has the on time duration of each power switch within each pulse width modulation period controlled by relationships between d, q components of a modulation index determined by the ratio of a voltage command to the instantaneous voltage of the AC mains expressed in stationary d, q coordinates, the selection of which is made based on inequalities between the AC mains voltage components expressed in dq coordinates, and relationships of the AC main voltage components expressed in d, q coordinates. Zero vectors are related to the one AC main having lower line-to-neutral voltage than the other AC mains, using relationships between the instantaneous AC mains voltage in d, q coordinates.

Inventors: Czerwinski; Christopher S. (Middletown, CT)

Assignee: Otis Elevator Company

International Classification: H02M 5/27 (20060101); H02P 29/00 (20060101); H02M 7/219 (20060101); H02M 5/02 (20060101); H02P 7/18 (20060101); H02P 7/28 (20060101); H02M 001/12 ()

Expiration Date: 12/26/2017