Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1995-06-07
1998-03-24
Sterrett, Jeffrey L.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
363 43, H02M 75387
Patent
active
057319707
ABSTRACT:
An inverter device includes plural modules, each module being formed by a series circuit having a parallel circuit of a first switching device and a first diode, and a parallel circuit of a second switching device and a second diode, allowing a reduced size, high reliability, high frequency switching and low noise. Each module forms one arm portion of the inverter. Lifetimes of the diodes and the switching devices are set in a manner to equalize losses in the inverter. Preferably, insulated gate bipolar transistors (IGBTs) formed by diffusion are used as the switching devices since the lifetimes of these devices can easily be adjusted to optimize design of the inverter.
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Horie Akira
Kimura Shin
Koike Yoshihiko
Mori Mutsuhiro
Nakata Kiyoshi
Hitachi , Ltd.
Sterrett Jeffrey L.
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