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A modular 4 phase Switched Reluctance Motor (SRM) for an electric two wheeler is designed. Conventional 4 phase SRM suffers from low frequency torque ripple due to asymmetric mutual coupling between adjacent phases. Therefore, a modular stator and rotor structure is proposed which eliminates mutual coupling between adjacent SRM phases. Since the structure needs 3D flux capability, Soft Magnetic Composite...
This paper presents a modified version of direct instantaneous torque control (DITC) for minimizing torque ripple in switched reluctance motor (SRM). In DITC, it is observed that the phase current profiles and torque ripple characteristics depend on the turn-on instant. For current profiles with low RMS value, an overshoot in torque is observed during the commutation period, which increases the torque...
Switched reluctance motor (SRM) is gaining prominence due to its simple and rugged construction, absence of permanent magnets, low cost, fault-tolerant capability and developments in power electronics. These benefits with SRM are counteracted by the presence of torque ripple, high acoustic noise, need for rotor position information and complex control due to nonlinear behavior. Torque ripple can be...
Switched reluctance motor (SRM) has gained attention due to simple construction, ruggedness, high reliability, low cost, minimum maintenance and advancement in power electronics technology. However, SRM has some inherent disadvantages such as torque ripple, acoustic noise, requirement of rotor position information and control difficulties due to nonlinearities. It is reported in literature that smooth...
The intra-campus two wheeler is a vehicle used for small daily commutes inside a campus. It is characterized by low power and small range thus making it suitable for conversion into an electric vehicle. In this paper, the electric drive-train of the vehicle is designed. Generally high torque density brushless DC hub motor is preferred for this application. But to achieve constant power output, the...
Use of in-wheel motors for lighter electric vehicles (EV) is widespread. Motors commonly used for this purpose are brushless DC motors (BLDC), because of high efficiency and power density. However, motors without permanent magnets are desirable due to lower initial cost and higher reliability. Switched reluctance motor (SRM), with simple and rugged construction, is an alternative. But, SRM has lower...
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