Title :
Overload for ASD Applications-how much is required?
Author :
Griggs, Miles ; Hartzo, Gregory D.
Author_Institution :
Siemens Energy & Autom. Inc., Alpharetta, GA
Abstract :
This paper lists various factors that define the continuous rating of an adjustable-speed drive (ASD). Operating scenarios are discussed that lead to requirements for temporary overload capability. Specification of ASD overloads is addressed along with methods that can be employed to avoid overloads. Common industrial machines are categorized according to their overload requirements, and application exception examples are provided. General requirements for ASD overload capability, as defined in National Electrical Manufacturers Association (NEMA) and International Electrotechnical Commission (IEC) standards, are reviewed and compared, and recommendations are given for additional user specifications that are appropriate for ac-motordrive applications
Keywords :
AC motor drives; variable speed drives; IEC; International Electrotechnical Commission standards; National Electrical Manufacturers Association; ac motor drive; adjustable speed drive; industrial machines; overload; Chemical industry; Costs; Frequency; IEC standards; Manufacturing; Petroleum; Shafts; Torque; Variable speed drives; Voltage; AC motor drive; adjustable-speed drive (ASD); breakaway torque; constant torque; inertia; overload capability; thermal capacity; variable torque;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.2006.876084
