Title:
DC PULSE GENERATOR FOR PREVENTING FISH ENTRY
Document Type and Number:
Japanese Patent JP3200614
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a DC pulse generator for preventing fish entry which enables the optional setting of the proper discharge voltage, discharge time, and discharge timing corresponding to the water quality and pollution state near an intake port or a drain port.
SOLUTION: This DC pulse generator is provided with an AC power source E1, a high-voltage transformer TR1 boosting the AC power voltage to the prescribed high voltage, a full-wave rectifying circuit D1 full-wave-rectifying the AC voltage boosted by the high-voltage transformer TR1, the first thyristor SCR1 arranged at the rear stage of the full-wave rectifying circuit D1 and on/off-operated by the gate voltage, a capacitor C1 accumulating the electric power outputted from the first thyristor SCR1, the second thyristor SCR2 arranged on the rear stage side of the capacitor C1 and on/off-operated by the gate voltage, a plurality of electrodes 1a, 1a' connected to the rear state side of the second thyristor SCR2 and erected in the water near an intake port or a drain port, and a control circuit 5 feeding the gate voltage to the thyristors SCR1, SCR2 at the desired timing, on/off-controlling the thyristors SCR1, SCR2, and controlling the charging voltage value and the charging/discharging timing of the capacitor C1.
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Inventors:
Koichi Koyama
Tetsuya Takizawa
Tetsuya Takizawa
Application Number:
JP20740897A
Publication Date:
August 20, 2001
Filing Date:
July 17, 1997
Export Citation:
Assignee:
Japan NUS Co., Ltd.
Kumagaya Electric Works Co., Ltd.
Ugajin Electric Co., Ltd.
Kumagaya Electric Works Co., Ltd.
Ugajin Electric Co., Ltd.
International Classes:
E02B1/00; E02B9/04; H02M9/00; H03K3/57; (IPC1-7): E02B1/00; E02B9/04; H02M9/00; H03K3/57
Domestic Patent References:
| JP4333712A | ||||
| JP63141221U |
Attorney, Agent or Firm:
Masayuki Asakura