Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1980-01-11
1981-11-24
Shoop, William M.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
363 45, H02M 706
Patent
active
043028063
ABSTRACT:
A filter for a polyphase rectifier includes first and second substantially identical sections each including a capacitor connected in series with a parallel circuit of a diode and a resistor, the capacitors of each section being connected at one end in common to a neutral or reference voltage terminal of the rectifier, the other ends of the first and second sections being connected to positive and negative output terminals, respectively, of the rectifier, the diode of the first section being polarized for passing current from the positive output terminal to its respective capacitor, the diode of the second section being polarized for passing current from the neutral terminal to its respective capacitor, the values of the resistors and capacitors being chosen for preventing the flow of ripple current through the first and second sections and substantially preventing discharging of said capacitors, for ensuring that the rectifier supply most of the load current, and for substantially eliminating peak current demands upon said rectifier for recharging the capacitors, the diodes and resistors permitting reactive load current to flow bidirectionally through their respective capacitors, and the capacitors also providing high-frequency filtering.
REFERENCES:
patent: 3317819 (1967-05-01), Brodie
patent: 3508135 (1970-04-01), Dijkstra et al.
patent: 3986100 (1976-10-01), Beierholm et al.
patent: 4191986 (1980-03-01), Huang et al.
Exxon Research & Engineering Co.
Shoop William M.
Watov Kenneth
Wong Peter S.
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