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Referring to a 4-wheel drive Formula Student Electric vehicle, a fractional-slot synchronous permanent magnet machine has been designed. Torque density has been improved adopting outer rotor topology and lightweight materials. An ironless rotor with PMs placed in an Halbach array configuration allows reduced rotor inertia to be obtained. The results described in the paper provide a quantitative assessment...
In this paper, a robust and an efficient tracking controller based on model reference adaptive system (MRAS) technique is performed for mobile robot in order to get the accurate trajectory tracking performance. The model reference adaptive system (MRAS) technique has been presented so as to achieve the estimated value of system's speed information. To estimate the rotor position and speed of the mobile...
In this paper, the circuit model of the parallel connected induction motors driven by single inverter is established. According to the circuit model, the problem of unbalanced electromagnetic torque caused by the wheel diameter difference of the parallel connected motors is analyzed. The weighted vector equation of the parallel connected motors is established. To improve the control performance with...
The reaction wheel pendulum is an underactuated electromechanical system consisting of a pendulum with an un-driven rotation axis at one end and a motor-driven wheel at the other end. Current flow in the motor induces a torque on the wheel and a corresponding reaction torque on the pendulum. This type of system has been studied by various researchers over the past decade, but in every case under the...
This paper presents a surface mounted (SM) permanent-magnet (PM) in-wheel motor for the propulsion of a small plug-in hybrid electric vehicle (PHEV) for urban use. The electric machine is a fractional number of slots per number of poles motor using concentrated winding (wound around one tooth). First the authors detail the technical specifications: the maximal torque and power respectively equal to...
This paper presents the analytical study, finite element model, and experimental tests on a three-phase surface-mounted permanent magnet (SPM) synchronous motor designed for the wheel of a hybrid vehicle. The paper focuses on the machine design process so as to achieve the maximum torque-to-current and torque-to-volume ratio. Combining finite element simulations and analytical model, the final solution...
To improve the torque performance of wheel motor, a concentrated winding motor with 12-slot-10-pole, embedded magnets rotor structure is presented in this paper. The influence of motorpsilas parameters such as the PMpsilas magnetization orientation length, the winding turns and inner diameter of stator on output torque is discussed by using finite element method. The design method of increasing motor...
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