Quantitative Comparison on Permanent-Magnet Vernier Machines With Improved Flux Modulation Effect for Automatic Guided Vehicles

In this paper, the interior permanent-magnet vernier (PMV) machines and conventional PMV machine are quantitatively compared regarding requirements for electric automatic guided vehicles (AGV). The key feature of is to place middle iron pole sandwiched by PMs in slots between salient rotor poles. As a result, three types with different PM arrangements, namely two V-type (V-PMV) one U-type (U-PMV) machines, developed. Due improved flux modulation effect, V-PMV U-PMV can respectively provide over 20% 30% higher torque density than counterpart, under high power factor level 0.86. working principle illustrated based on field theory. A comparative study among conducted terms electromagnetic performances dynamic responses, after performing global optimization design parameters. Finally, prototype manufactured tested experimental validations.