Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1981-09-18
1983-11-22
Shoop, William M.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
43 171, 307106, 363128, H02M 7155
Patent
active
044173016
ABSTRACT:
An improved method of electric fish trawling which utilizes the fright-reaction exhibited by fish exposed to an electric field is disclosed. The method utilizes a trawling net equipped with electrodes which emit DC pulses having a repetition rate of six cycles per second or less, a pulse duration of approximately one millisecond, and producing a field having a voltage gradient of one-hundred eighty volts per meter. A pulse generating circuit, which uses full-wave rectified single phase power or three phase, half-wave rectified power for a condenser discharge circuit is also provided.
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