Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1997-12-09
1999-08-03
Wong, Peter S.
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
363 56, 361 18, H02M 324, H02H 7122, H02H 700
Patent
active
059333413
ABSTRACT:
A power converting apparatus is comprised of an inverter unit arranged by a switching semiconductor element 51a for an upper arm and another switching semiconductor element 51d for a lower arm, and for turning ON/OFF the switching semiconductor elements to thereby convert DC power inputted from a DC power supply into AC power; and control means 10a for judging as to whether or not an abnormal operation is present based upon an output of a comparator 11a for judging as to whether or not a detection voltage detected by a voltage detecting circuit 61 is substantially equal to a voltage of the positive polarity; an output of a comparator 11b for judging as to whether or not a detection voltage detected by the voltage detecting circuit 61 is substantially equal to a voltage of the negative polarity; and an output signal of an igniting signal for ON/OFF-controlling the switching semiconductor elements, this voltage detecting circuit 61 detecting an output voltage of the inverter unit via a voltage dividing resistor, while using as a reference a potential at the positive polarity of the DC power supply, or a potential at the negative polarity thereof.
REFERENCES:
patent: 4189764 (1980-02-01), Snyder
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patent: 4626952 (1986-12-01), Morikawa
patent: 5687049 (1997-11-01), Mangtani
patent: 5719519 (1998-02-01), Berringer
patent: 5719754 (1998-02-01), Fraidlin et al.
patent: 5719759 (1998-02-01), Wagner et al.
Ando Taro
Daijyo Masakatu
Goto Yohichi
Ikeda Katsushi
Kuriyama Shigemi
Mitsubishi Denki & Kabushiki Kaisha
Vu Bao Q.
Wong Peter S.
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