Electrical transmission or interconnection systems – Plural supply circuits or sources – Load current control
Reexamination Certificate
2007-03-20
2010-11-02
Deberadinis, Robert L. (Department: 2836)
Electrical transmission or interconnection systems
Plural supply circuits or sources
Load current control
C307S054000
Reexamination Certificate
active
07825540
ABSTRACT:
A power conversion device including sub-inverters, each connected in series with respective phase of a three-phase main inverter including a smoothing capacitor, which is fed from a power supply via a converter, as a DC input thereof, and feeds power to a load using the sum of outputs of the inverters. A manipulative quantity is determined so that the DC voltage at each of smoothing capacitors which is an input of each of the sub-inverters will follow a command value. The manipulative quantity is added to an output voltage command for the three-phase main inverter, and is subtracted from an output voltage command for the sub-inverters. Thus, power is shifted from the three-phase main inverter to the smoothing capacitors of the sub-inverters.
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S. Mariethoz, A. Rufer, Resolution and efficiency improvements for three-phase cascade multilevel inverters, 2004 IEEE, pp. 4441-4446.
Harakawa Masaya
Imanaka Akira
Kishida Yukimori
Ogusa Shinichi
Sekimoto Yasuhiro
Deberadinis Robert L.
Mitsubishi Electric Corporation
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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