Title :
The study on the direct torque controlled induction motor based on low loss inverter with double-frequency for electric vehicles
Author :
Zhao, Junhui ; Wang, Mingyu ; Liu, Shuxi ; Zhou, Yanjing
Author_Institution :
State Key Lab. of Power Transm. Equip. & Syst. Security & New Technol., Chongqing Univ., Chongqing
Abstract :
This paper presents a new kind of direct torque control (DTC) system based on the inverter with double-frequency for the motor drives of electric vehicles (EVs). According to the theory of the converter with double-frequency, the topology of a new kind of inverter with double-frequency is derived, and the operation states of the new circuit are analyzed. This kind of inverter has good dynamic and steady-state performance as the high frequency inverter, and the efficiency is close to a single low frequency one. For the reduction of the torque ripple, improved switch table is employed in the DTC system. The observation of the flux linkage is achieved by the u - n model. The simulation results show that this system is effective for the control of the induction motor and the validity of the proposed new circuit is also verified.
Keywords :
electric vehicles; induction motor drives; invertors; machine control; power convertors; torque control; converter; direct torque controlled induction motor; electric vehicles; flux linkage; low loss inverter; motor drives; torque ripple reduction; u-n model; Circuit analysis; Circuit topology; Electric vehicles; Frequency; Induction motors; Inverters; Motor drives; Switches; Torque control; Vehicle dynamics; Direct torque control; Induction motor; Inverter with double-frequency;
Conference_Titel :
Vehicle Power and Propulsion Conference, 2008. VPPC '08. IEEE
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-1848-0
Electronic_ISBN :
978-1-4244-1849-7
DOI :
10.1109/VPPC.2008.4677443
