THE IMPACT OF STATOR OUTER SHAPE ON THE EFFICIENCY OF INVERTER AIR CONDITIONING COMPRESSOR MOTORS
This paper investigates the impact of the stator outer diameter chamfer design on the efficiency of PMSMs used in variable frequency air conditioning compressor.With the goal of maintaining specific requirements for the stator chamfer area and contact area with the motor casing,two innovative chamfer design schemes were proposed.Advanced electromagnetic field simulations were conducted to analyze iron loss and overall motor performance for both designs.Two experimental prototypes were then produced to validate the simulation results.Simulation analysis showed that while the difference in iron loss between the two schemes was minimal,experimental testing revealed a key insight:the design with a more uniform chamfer shape notably reduced iron loss,particularly at low and high operating speeds.This improvement is mainly attributed to the effective reduction of residual stress areas during the manufacturing process,as well as the optimization of the yoke magnetic circuit,which can reduce iron losses caused by rotational magnetization,leading to a marked increase in motor efficiency.These findings offer valuable practical guidance for enhancing compressor motor performance,particularly in variable frequency air conditioning systems.
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