VALVE CONTROL DEVICE FOR SAFE OPERATING OF PROPULSION VALVE
PURPOSE: A valve control device for safe operating of thruster valve is provided to prevent the malfunction of a power switch element due to the unstable power source supply. CONSTITUTION: A valve control device for safe operating of thruster valve(13-1) comprises three layered power switch structur...
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Format: | Patent |
Sprache: | eng ; kor |
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Zusammenfassung: | PURPOSE: A valve control device for safe operating of thruster valve is provided to prevent the malfunction of a power switch element due to the unstable power source supply. CONSTITUTION: A valve control device for safe operating of thruster valve(13-1) comprises three layered power switch structure composed of first, second and third power switches(31,32,33). The first power switch is connected to the main power source and has a latching function. The second power switch is connected to the first relay switch. The second power switch rapidly shut off the main power source. The third power switch is connected to the second power switch. The third power switch supplies main power source to the thruster. |
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