Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2011-06-21
2011-06-21
Duda, Rina I (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S801000, C363S124000
Reexamination Certificate
active
07965056
ABSTRACT:
The invention provides a control apparatus of a power conversion system for driving an induction motor via a VVVF inverter, wherein the AC voltage generated by the inverter is increased so as to expand the high-speed side property of the induction motor, to thereby improve the performance during power running and regenerative braking. In the present system, a DC power supply source having a power storage system with a capacity capable of processing the current flowing into or out of the inverter is inserted in series to the ground side of the input of the inverter, and the output voltage thereof is controlled from zero in a continuous manner to be added to the trolley voltage, which is then applied to the inverter.
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Yoshiaki Taguchi et al., A Simple Construction of Series-Input Energy Storage Device Connected with Inverter, The Papers of Technical Meeting on Transportation and Electric Railway, IEE Japan, Sep. 8, 2006, pp. 27-32.
Nagasu Masahiro
Shimada Motomi
Terunuma Mutsuhiro
Toyota Eiichi
Antonelli, Terry Stout & Kraus, LLP.
Duda Rina I
Hitachi , Ltd.
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