Title :
GTO thyristor commutation of DC machine
Author :
Gray, Clifford B. ; Ghaffary, Ahmad ; Karim, A. Majeed H
Author_Institution :
Dept. of Electr. Eng., Bradford Univ., UK
Abstract :
The authors review the fundamental mechanism by which rotating electrical machines develop torque and draw conclusions as to which configuration offers inherent advantages in this regard. Development of a DC machine with a continuous armature winding where gate turn-off (GTO) thyristors replace the traditional copper-segment-carbon-brush commutator is described. Operation of a separately excited machine with 12 armature tapping points and 18 GTO thyristors is demonstrated, and waveforms are presented to illustrate the switching duties involved.<>
Keywords :
DC machines; commutation; thyristor applications; DC machine; GTO thyristor commutation; continuous armature winding; gate turn-off; rotating electrical machines; torque; AC machines; Armature; Coils; Commutation; DC machines; Machine windings; Magnetic flux; Rails; Saturation magnetization; Thyristors;
Conference_Titel :
Industry Applications Society Annual Meeting, 1989., Conference Record of the 1989 IEEE
Conference_Location :
San Diego, CA, USA
DOI :
10.1109/IAS.1989.96647
