Modelling of PMBLDC Motor and Study of Electromagnetic Characteristics
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Abstract
Electric vehicles are commercially developed with the intention of providing the range, pursuance, comfort to commuter, safety and hassle-free operation at a fair and vying price range. It has become very much essential for the automobile industries to install batteries performing at its best, available at low cost which are safe and reliable. Also, it is necessary to develop an interspersed propulsion system to provide large power density, enhanced efficiency which could be very critical for the future Electric vehicles. The present PMBLDC motors of 48V were employed in light vehicle applications which have disadvantages such as decreasing torque to speed ratio and decreasing power to speed ratio. The torque and power of PMBLDC motors were tending to remain constant after speed. The characteristic of the motor was studied using FEM. This work is proposed to build a 72V PMBLDC motor which will be replacing the existing 48V PMBLDC motor for Light Motor Vehicle applications. The power output of the motor will be comparatively high. It has been proposing to design a controller using INSTA-SPIN(BLDC) controller from Texas instruments which will be able to produce the required switching patterns from the 3-Phase bridge in order to regulate the Torque and power produced, when compared to the existing 48V PMBLDC. The characteristic of both the motors are to be compared using FEM. The torque vs speed curve is expected to remain constant with the increasing loads applied on the motor. The motor is expected to produce power constantly with the increasing loads.
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