Title :
Commutation of universal motors
Author :
Fujii, Toshio ; Hanazawa, Tamio
Author_Institution :
Kyushu-Sangyo Univ., Fukuoka, Japan
Abstract :
A method of diminishing the reactance voltage by suppressing the magnetomotive force in order to improve commutation is discussed. The authors elaborate some of the information from a previously published work concerning commutation and reactance voltage. Reactance voltage analysis, excessive armature reaction analysis, and brush contact resistance analysis are presented. Speed coverage of the suppressing effect, a suppressing circuit using a bypass condenser, and poor commutation due to mechanically unstable brushes are also discussed.<>
Keywords :
commutation; electric motors; brush contact resistance analysis; bypass condenser; commutation; excessive armature reaction analysis; magnetomotive force suppression; mechanically unstable brushes; reactance voltage; suppressing circuit; universal motors; Armature; Brushes; Coils; Commutation; DC motors; Magnetic flux; Pulse generation; Senior members; Universal motors; Voltage;
Conference_Titel :
Industry Applications Society Annual Meeting, 1989., Conference Record of the 1989 IEEE
Conference_Location :
San Diego, CA, USA
DOI :
10.1109/IAS.1989.96662
