2016 **Abstract:** The use of power electronics has led to a growing importance of higher time-harmonic content in electrical machines. To gain insight in phenomena related to these higher harmonics, such as noise and losses, a good understanding of the magnetic field's harmonic content is mandatory. Moreover, the development of fast and accurate, harmonic-based, analytical models requires a qualitative knowledge of the machine's time-and spatial-harmonic content. Although the harmonic content of electric machines is an extensiv…

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“…(b) 6s/(7, 11)r, 12s/ (10,14)r, 18s/ (17,19)r and 24s/20r VFRMs have higher average output torque than their counterparts with the same stator slot number, which reveals the conclusion that the stator slot and rotor pole number should be close to each other to achieve the highest output torque.…”

confidence: 97%

“…(b) 6s/(7, 11)r, 12s/ (10,14)r, 18s/ (17,19)r and 24s/20r VFRMs have higher average output torque than their counterparts with the same stator slot number, which reveals the conclusion that the stator slot and rotor pole number should be close to each other to achieve the highest output torque.…”

confidence: 97%

“…As proved in [16], the modulated MMFs of armature and field currents are identical to their corresponding MMFs in terms of harmonic order and corresponding rotating speed, albeit with modified harmonic magnitude due to the modulation effect of stator slot effect. In this case, the spatial harmonic content of modulated MMF can be easily deduced from winding theory [17].…”

confidence: 99%

“…Moreover, the harmonic content of synchronous electric machines can be predicted. An extensive discussion on this prediction is presented in [10]. This section is limited to a brief introduction on the topic so that the results can be used in Section V. There are four aspects that define the machine's harmonic content; the permanent magnets, the stator currents, the winding distribution and the machine's geometry.…”

confidence: 99%

“…It was shown in [10] that, if the machine's winding is determined using the SOS, it contains ςmτ slot groups (also known as phase belts). Where ς = 1 or ς = 2, depending on whether Ns τ is odd or even.…”

confidence: 99%