Title :
Investigation on fault operations of full-converter fed DC drives
Author :
Moo, Chini S. ; Chan, Shun Y. ; Chuang, Ying C. ; Chang, Yong N.
Author_Institution :
Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan
Abstract :
A full-converter fed DC drive, when only a few thyristors have been damaged, can still be operated under partial load with deteriorated performance. In this paper, all possible fault cases are categorized into nine representative modes. The switching functions of the power switches are derived for calculating the output voltage waveforms of the faulty converter. By applying these waveforms to the DC machine, torque-speed characteristics of each mode are obtained. The calculated converter output waveforms are verified experimentally on a 10 HP DC drive. Through out the investigation on the operating characteristics, this paper provides a guidance to the temporary use of faulty DC drives
Keywords :
DC motor drives; electrical faults; power convertors; power semiconductor switches; switching circuits; 10 hp; fault operations; full-converter fed DC drive; output voltage waveforms; partial load operation; power switches; switching functions; torque-speed characteristics; Circuit faults; Commutation; DC machines; Mechanical variables control; Power semiconductor switches; Solid state circuits; Switching circuits; Switching converters; Thyristors; Voltage;
Conference_Titel :
Industry Applications Conference, 1995. Thirtieth IAS Annual Meeting, IAS '95., Conference Record of the 1995 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-3008-0
DOI :
10.1109/IAS.1995.530276
