NASA Technical Reports Server (NTRS) : Improved pdf

NASA Technical Reports Server (NTRS) : Improved

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This paper describes the design, installation, and integrated systems tests for a new drive motor speed control system which was part of a recent rehab project for the NASA Lewis 8×6 Supersonic Wind Tunnel. The tunnel drive consists of three mechanically-coupled 29,000 HP wound rotor induction motors driving an axial flow compressor. Liquid rheostats are used to vary the impedance of the rotor circuits, thus varying the speed of the drive system. The new design utilizes a distributed digital control system with a dual touch screen CRT operator console to provide alarm monitoring, logging, and trending. The liquid rheostats are driven by brushtype servomotor systems with magnetostrictive linear displacement transducers used for position feedback. The new system achieved all goals for speed variations with load, motor load balance, and control of total power

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 1/1/1995
• Year: 1995
• Book Topics/Themes: NASA Technical Reports Server (NTRS), CONTROL SYSTEMS DESIGN, INDUCTION MOTORS, NUMERICAL CONTROL, SPEED CONTROL, SUPERSONIC WIND TUNNELS, WIND TUNNEL DRIVES, MAGNETOSTRICTION, POWER SUPPLY CIRCUITS, SERVOMOTORS, TURBOCOMPRESSORS, Becks, Edward A., Bencic, Timothy J., Blumenthal, Philip Z

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