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This paper presents an electric drive consisting of a multiphase induction motor fed by a multiphase inverter. The control system is similar to that of a traditional field-oriented control for three-phase motors, but the machine speed is estimated by a novel sensorless observer. Since multiphase motors with M phases (M is supposed odd) have the capability of controlling the odd spatial harmonics of...
A control scheme for a high torque-density seven-phase induction motor is presented. This scheme integrates within a coherent solution some of the features that are commonly required to a modern electric vehicle drive, such as the capability to exploit the maximum torque in the whole speed range, a weak dependence on the motor parameters, a good robustness against the variations of the dc-link voltage...
In this paper, a rotor-flux-oriented control scheme for seven-phase induction motor drives is presented. At low speed the proposed control scheme is able to increase the motor torque by adding a third harmonic component to the air-gap magnetic field. Above the base speed the control system reduces the motor flux in such a way to ensure the maximum torque capability. The validity of the proposed control...
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