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Five-phase Surface-mounted Permanent Magnet (SPM) machine offers the possibility of using the third harmonic of current to improve the average torque. In this paper, the use of third harmonic to compensate the pulsating torque and thus to reduce the vibrations transmitted to the shaft is explored. According to the multimachine theory, the torque of a five-phase star-connected SPM machine is distributed...
A direct grid-current control method is proposed to attenuate low-order current harmonics in three-phase LCL-filtered grid-connected inverters. This method allows the use of a distorted reference current, thus the reference can be generated directly from grid voltage or by a simple phase-locked loop (PLL). It is found that the direct control is necessary for effectively attenuating the current harmonics...
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