Title :
A high performance dynamometer for drive systems testing
Author :
Sousa, Gilberto C D ; Errera, Denis R.
Author_Institution :
Dept. of Electr. Eng., Univ. Federal de Espirito Santo, Vitoria, Brazil
Abstract :
A dynamic dynamometer and its attendant man-machine interface, designed to facilitate the development and testing of adjustable speed drive systems, is presented in this work. It is based on a vector-controlled induction motor drive supplied from the AC mains through a double PWM converter that provides desirable features such as bi-directional power flow, near unity power factor and low harmonic factor at the AC mains. The proposed system estimates torque from machine terminal voltages and currents, thus eliminating the load cell and special mechanical construction, and allowing a standard induction machine to be employed, with conventional machine coupling. Several commonly used load torque profiles, both static and dynamic, can be emulated by the dynamometer. A theoretical analysis is first presented, followed by a detailed simulation study to assess the torque estimation sensitivity to parameter variation as well as the overall system performance under dynamic conditions
Keywords :
dynamometers; harmonics; induction motor drives; load flow; machine control; machine testing; parameter estimation; power factor; torque; variable speed drives; adjustable speed drive systems; bi-directional power flow; double PWM converter; drive systems testing; dynamic dynamometer; dynamic load torque profiles; high performance dynamometer; low harmonic factor; machine terminal currents; machine terminal voltages; near unity power factor; static load torque profiles; torque estimation; torque estimation sensitivity; vector-controlled induction motor drive; Bidirectional control; Induction motor drives; Load flow; Power system harmonics; Pulse width modulation converters; Reactive power; System testing; Torque; User interfaces; Variable speed drives;
Conference_Titel :
Industrial Electronics, Control and Instrumentation, 1997. IECON 97. 23rd International Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-3932-0
DOI :
10.1109/IECON.1997.671784