Publication Date:
2019-07-13
Description:
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 8x6 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.
Keywords:
INSTRUMENTATION AND PHOTOGRAPHY
Type:
NASA-TM-106840
,
E-9404
,
NAS 1.15:106840
,
International Instrumentation Symposium; May 07, 1995 - May 11, 1995; Denver, CO; United States
Format:
application/pdf
