Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Improving AC Motor Efficiency with Fuzzy Logic Energy Optimizer.
Author Spiegel, R. J. ; Chappell, P. J. ; Cleland, J. G. ;
CORP Author Research Triangle Inst., Research Triangle Park, NC. Center for Digital Systems Research.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher Aug 94
Year Published 1994
Report Number EPA-R-818282-01; EPA/600/A-94/240;
Stock Number PB95-155016
Additional Subjects Electric motors ; Air pollution abatement ; Fuzzy systems ; Variable speed drives ; Alternating current ; Energy efficiency ; Electronic control ; Control systems ; Controllers ; Artificial intelligence ; Energy conservation ; Optimization ; Energy consumption ; AC generators ;
Library Call Number Additional Info Location Last
NTIS  PB95-155016 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 05/26/1995
Collation 12p
The paper discusses EPA's research program to develop fuzzy-logic-based energy optimizers for alternating-current (AC) induction motors driven by Adjustable Speed Drives (ASDs). The technical goals of the program are to increase the efficiency of ASD/motor combinations (especially when operating at off-rated torque/speed conditions), develop a generic controller for energy optimization that can be applied to a wide range of motors and ASDs regardless of size and application, and develop a controller for energy optimization that can eliminate the requirement for tachometer or encoder feedback, and still maintain the stability and response of closed-loop control. Electric motors use over 60% of the electrical power generated in the U.S. The U.S. population of approximately 1 billion motors use over 1700 billion kWh per year. Over 140 million new motors are sold each year. A review of the U.S. motor population reveals that 90% of the motors are less than 1 hp (fractional motors) in size, but use less than 10% of the electricity consumed by motors. More that 80% of the electricity used by motors is consumed by less than 1% of the motor population (motors greater than 20 hp). Thus, it is clear that large energy savings from improvement in motor efficiency could be achieved from a relatively small motor population.