DocumentCode :
3582233
Title :
Multiphase induction motor drive with 1:3:9:15 speed ratios for gear free electric vehicle application
Author :
Umesh, B.S. ; Sivakumar, K.
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol. Hyderabad, Hyderabad, India
fYear :
2014
Firstpage :
1
Lastpage :
6
Abstract :
Wide variation in speed from low speed crawling to high speed cruising, maintaining constant power operation is the most desired characteristic of a drive used in electric vehicles (EV). Pole phase modulated multiphase induction motor (IM) drive is capable of extending the constant power operation over very wide range of speed with transient high torque for electric launch or hill climbing. In this paper a 45 phase squirrel cage IM drive with 1:3:9:15 speed ratio using pole phase modulation is proposed. The four speeds achieved by electrical pole changing eliminate the need of mechanical gear box which saves in weight and size of the EV. Phase number appears to be slightly large, but with the advantages such as reduction in voltage rating of the power switch and dc link supports the selection of large phase number. In addition high number of phases considerably reduces torque ripple and increases efficiency by reducing slot harmonics, operation of the proposed EVI drive for 45 phase 2 pole, 15 phase 6pole, 5 phase 18 pole and 3 phase 30 pole combinations is verified by FEA simulation using 5hp model in Ansys Maxwell (an electromagnetic package) and Simplorer (associated circuit simulator). Drive performance with pure sinusoidal voltage and two-level inverter excitation are compared. Due to the selection of high number of phases even with two-level inverter excitation, performance of the drive is not degraded.
Keywords :
electric vehicles; finite element analysis; gears; induction motor drives; phase modulation; squirrel cage motors; Ansys Maxwell; FEA simulation; Simplorer; associated circuit simulator; dc link; electromagnetic package; gear free electric vehicle; induction motor drive; inverter excitation; mechanical gear box; pole phase modulation; power 5 hp; power switch; squirrel cage IM drive; Atmospheric modeling; Gears; Integrated circuit modeling; Inverters; Phase modulation; Torque; Windings; 15 speed ratios; 1:3:9; electric vehicles; gear free; multiphase induction motor;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Information and Automation for Sustainability (ICIAfS), 2014 7th International Conference on
Type :
conf
DOI :
10.1109/ICIAFS.2014.7069559
Filename :
7069559
Link To Document :
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