Effect of Stator Slots on Electromagnetic Performance of a High-Voltage Line-Start Permanent Magnet Synchronous Motor

It is well known that the use of slotted stators in motors produces undesirable effects, such as magnetic flux distortion, additional losses, ripple torque, and vibration. However, a large number of studies pay more attention to stator slots and magnetic slot wedges (MSW) in asynchronous motors and...

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Bibliographic Details
Published in:Energies (Basel) 2022-05, Vol.15 (9), p.3358
Main Authors: Li, Dongming, Feng, Guihong, Li, Wei, Zhang, Bingyi, Zhang, Jiaxu
Format: Article
Language:English
Subjects:
Asynchronous motors
Herbivores
High voltage
High voltages
line-start permanent magnet synchronous motor (LSPMSM)
Load distribution
Magnetic fields
Magnetic flux
magnetic slot wedge
Magnetism
Motor task performance
Permanent magnets
Prototypes
pull-in torque
Reactance
starting torque
stator leakage reactance
stator slot
Stators
Synchronous motors
Torque
Vibration
Voltage
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Summary:It is well known that the use of slotted stators in motors produces undesirable effects, such as magnetic flux distortion, additional losses, ripple torque, and vibration. However, a large number of studies pay more attention to stator slots and magnetic slot wedges (MSW) in asynchronous motors and permanent magnet motors, ignoring the same problems in large capacity high voltage line start permanent magnet synchronous motors (HVLSPMSM). In order to disclose the effect of the stator slot on HVLSPMSMs, the no-load air gap magnetic field distribution and stator leakage reactance are studied. Meanwhile, the differences in the starting torque, pull-in torque and pull-out torque of four slot models are compared, and the starting performance is more affected by stator slot. In practical manufacturing, the application of MSWs is the main way to change the electromagnetic performance of stator slots, so the influence of MSWs under different permeabilities on the performance of HVLSPMSMs is investigated. Finally, the effect of a stator slot on the motor starting performance and the rated performance are verified by prototypes and experimental tests, which provide a reference for the application of MSWs in HVLSPMSMs.
ISSN:1996-1073
1996-1073
DOI:10.3390/en15093358