Abstract-The multilevel inverter is a promising technology compared to two-level inverters in the applications of ac-drives and smart-grid applications. In this paper, a dual-T-type threelevel inverters is used to drive an open-end winding induction machine. The Space-Vector Pulse-Width Modulation is selected as a good-performing control strategy to control the dual-inverter. A comparison between the proposed configuration and the conventional diode clamped converter is included. The proposed drive system is designed and modeled by using Matlab/Simulink. It is shown that the converter gives the same hexagon, wave forms and harmonic spectrum of the five level converter. An optimized switching state selection is used to reduce the converter losses. The advantages and drawbacks of the dual-T-type configuration are discussed. In addition, the harmonic analysis and the loss calculations of the dual-T-type converter are provided and compared to the T-type three-level converter and the conventional five-level diode-clamped-converter.

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This paper presents a detailed dynamic model of an electric vehicle with two independent wheel drives and an improved traction control system. The present research demonstrates a model and analysis of a traction control system for two independent wheels drives electric vehicles. An electrical differential was implemented assuring that in a straight trajectory, the two rear wheels run exactly at the same speed (for a steering angle equals zero) and for the same road conditions under the left and right side of wheels. However, an electrical differential with the control strategy is established due to: 1-When the vehicle turns right and left, the references for the rear speeds are selected according to the steering angle, to ensure that during turning the wheels will maintain the relative speeds imposed by the trajectory geometry. 2-When the motor is tested with two different subclasses of four quadrant of DC/DC chopper voltage to study the method for developing energy saving. With the information about the real speed of the vehicle, on left and right sides, the control algorithm changes the generated torques in each wheel drive, in order to produce the same traction force applied to the road surface.