Title :
Reference frame coinciding control scheme for a double winding LIM of a PRT system
Author :
Gu, Bon-Gwan ; Kang, Gubae ; Nam, Kwanghee
Author_Institution :
Dept. of Electr. Eng., Pohang Inst. of Sci. & Technol., South Korea
Abstract :
In the personal rapid transit (PRT) system, a double winding linear induction motor (LIM) is used for the purpose of redundancy. In a double winding LIM, two sets of windings are wound in a single yoke, and each of them are controlled by separate inverters. If the flux reference frames that reside in the two inverters are not identical, then abrupt flux changes take place in the region where the two windings are overlaid. Such an abrupt change in the air gap flux causes a reduction of force due to the discontinuous flux distribution. The proposed method enforces the two flux angles to be aligned. Angle information exchange can be realized through the use of the RS-232 communication between the two inverter systems
Keywords :
invertors; linear induction motors; machine control; machine windings; magnetic flux; rapid transit systems; transportation; RS-232 communication; air gap flux; angle information exchange; discontinuous flux distribution; double winding LIM; flux reference frames; inverters; linear induction motor; personal rapid transit system; reference frame coinciding control scheme; Control systems; Current supplies; Fault tolerance; Induction motors; Inverters; Merging; Redundancy; Vehicles; Voltage; Wounds;
Conference_Titel :
Electric Machines and Drives Conference, 2001. IEMDC 2001. IEEE International
Conference_Location :
Cambridge, MA
Print_ISBN :
0-7803-7091-0
DOI :
10.1109/IEMDC.2001.939404
