Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1982-07-19
1984-10-30
Shoop, William M.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
363 58, 363160, 363164, 363165, H02M 7515
Patent
active
044803010
ABSTRACT:
A system for forming addressing signals for addressing respective converter switches of a frequency converter; the frequency converter being of the type which is provided with DC input terminals for receiving electrical energy which is conducted to phase output terminals when the converter switches are operated in response to the addressing signals. Each of the combinations of converter switches is associated with a discrete space vector, and a load voltage vector is determined. In operation, two of the discrete space vectors which are adjacent to the voltage space vector are addressed for respective dwell times which correspond to the components of the voltage space vector as impressed upon the adjacent discrete space vectors. Either prior to or after the addressing of the adjacent discrete space vectors within a switching cycle, a short circuit state is addressed. In one embodiment, the order in which the adjacent discrete space vectors are addressed is reversed for each subsequent switching cycle. Also, the DC input terminals to which the phase outputs are short circuited are alternated.
Pfaff Gerhard
Wick Albert
Ault Anita M.
Shoop William M.
Siemens Aktiengesellschaft
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