Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Reexamination Certificate
2005-08-30
2005-08-30
Patel, Rajnikant B. (Department: 2838)
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
C363S037000
Reexamination Certificate
active
06937488
ABSTRACT:
A control circuit calculates, through PI control, the amplitude of a current command per half cycle of an input voltage at a point in time where the sign of the input voltage from the AC power supply20detected by an input voltage detector31changes based on the difference between a reference voltage command and the voltage of a capacitor detected by a DC voltage detector30, calculates a normalized current command by dividing the amplitude of the current command by the peak value of the last input voltage and multiplying the resulting value by the input voltage, and generates a switching signal for performing on/off control of a switching element38by comparing the current command thus calculated with the input current detected by the input current detector circuit32.
REFERENCES:
patent: 5045989 (1991-09-01), Higaki et al.
patent: 6215287 (2001-04-01), Matsushiro et al.
patent: 6783440 (2004-08-01), Togawa et al.
patent: 2001-16856 (2001-01-01), None
patent: 2001-86737 (2001-03-01), None
patent: 2001-95262 (2001-04-01), None
Mitsubishi Denki & Kabushiki Kaisha
Patel Rajnikant B.
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