Method of Cogging Torque Reduction for Built-in Permanent Magnet Synchronous Motor

Yang, Yong; Wang, Xudong

doi:10.1088/1742-6596/2246/1/012041

Cited by 3 publications

(2 citation statements)

References 7 publications

(6 reference statements)

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“…Therefore, the cogging torque is computed for different magnets shapes. In the literature, different techniques are used to minimize the cogging torque in permanent magnet motor [23][24][25][26][27]. In our work, we are interested in the method based on segmenting and spacing the magnets.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design and Cogging Torque Minimization of a Permanent Magnet Motor for an Electric Vehicle

2023

Teh. vjesn.

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With the increase of electric vehicle mobility, the integration of an electric motor inside the vehicle wheel is an interesting architecture for electric vehicles. This solution has the advantage of a great compactness of the motor and the elimination of mechanical transmission. This paper deals with the analytical modeling and the optimal dimension's finding of an in-wheel motor. An optimization procedure, based on Sequential Quadratic Programming SQP, is performed. The main objectives are the minimization of the machine weight and the maximization of its efficiency. While respecting constraints, an optimal machine with a weight of 11.61 kg and an efficiency of 93% is reached. To verify the satisfaction of the design requirements and the motor performances, finite element analysis (FEA), was applied. The comparison of induction results shows a good accuracy with a maximum error of 14%. The output torque and the air gap flux density are assessed. A maximum output torque of 90 Nm is achieved, and the slotting effect is noticed. Then the cogging torque of the machine is investigated; different rotor structures were studied. It is concluded, from results, that the topology with circular segmented magnets has the lowest cogging torque which does not exceed 7 Nm.

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Section: Introductionmentioning

confidence: 99%

Optimal Design and Cogging Torque Minimization of a Permanent Magnet Motor for an Electric Vehicle

2023

Teh. vjesn.

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“…Compared with the surface permanent magnet synchronous motor (SPMSM), the IPMSM has a slightly higher torque density per unit volume due to the reluctance torque. Thus, the IPMSM has wide applications in electric vehicles [1,2]. However, the interaction between the permanent magnets and the stator teeth generates the cogging torque.…”

Section: Introductionmentioning

confidence: 99%

Minimization of Cogging Torque for V-Type IPMSM by the Asymmetric Auxiliary Slots on the Rotor

Wan

Yang

et al. 2022

IEEE Access

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The interaction between the permanent magnets and the armature teeth of the PMSM generates cogging torque. It causes vibration and noise. Therefore, this paper establishes the analytical formula of the cogging torque of the motor with auxiliary slots on the surface of the rotor. It shows that reasonable slots can weaken the cogging torque. But it's essential to determine whether the air-gap flux density harmonics will increase appreciably by slotting. A V-type IPMSM with 8-pole, 48-slot is modeled to analyze the cogging torque. Two new rotor slot shapes-inwardly biased slots and outwardly biased slots-are proposed and researched to reduce the cogging torque of the V-type IPMSM. And they are compared with the traditional symmetrical auxiliary slots. Research shows that the inwardly biased slots and the symmetric auxiliary slots can obtain a better effect on the cogging torque than the outwardly biased slots. By the symmetrical auxiliary slots, the cogging torque is weakened by 75.88%, but the torque ripple increases from 22.36% to 29.60%. By the inwardly biased slots, the cogging torque is weakened by 75.64%, and the torque ripple drops from 22.36% to 12.95%. The inwardly biased slots could successfully suppress the torque ripple.INDEX TERMS Cogging torque, Interior V-type permanent magnet synchronous motor, Auxiliary slots.

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Tracking of cogging stiffness using the multi-bin SDFT

Vanbecelaere,

De Viaene,

Monte

et al. 2024

Mechanics Based Design of Structures and Machines

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Method of Cogging Torque Reduction for Built-in Permanent Magnet Synchronous Motor

Cited by 3 publications

References 7 publications

Optimal Design and Cogging Torque Minimization of a Permanent Magnet Motor for an Electric Vehicle

Optimal Design and Cogging Torque Minimization of a Permanent Magnet Motor for an Electric Vehicle

Minimization of Cogging Torque for V-Type IPMSM by the Asymmetric Auxiliary Slots on the Rotor

Tracking of cogging stiffness using the multi-bin SDFT

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