A reduction method of cogging torque for IPMSM

Kawaguchi, Yoshinari; Sato, Tatsunori; Miki, Ichiro; Nakamura, Toshikazu

doi:10.1109/icems.2005.202522

Cited by 10 publications

(2 citation statements)

References 4 publications

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“…It can also be used in the case of v-shape web type PMSM, as the magnet spread, because the principle behind the equation is the reduction of torque ripple by employing uniformity of reluctance only [13]. An approach to minimizing cogging torque using flux barriers is also presented [14]. The design of concentrated wound interior permanent magnet synchronous motor (IPMSM) with symmetrically positioned flux barriers to address smaller sensorless operating regions and significant torque ripples is proposed [15].…”

Section: Introductionmentioning

confidence: 99%

Optimization of cogging torque in interior permanent magnet synchronous motor using optimum magnet v-angle

Patel,

Doshi,

Mahagoakar

et al. 2023

Electrical Engineering & Electromechanics

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Introduction. At present, the most important requirement in the field of electrical engineering is the better utilization of electrical power, due to its increasing demand and not-so-increasing availability. A permanent magnet synchronous motor (PMSM) is increasingly gaining popularity in various household and industrial applications because of its superior performance compared to conventional electrical motors. Purpose. PMSM is designed based on the selection of various design variables and optimized to fulfill the same. Being superiorly advantageous over other motors, PMSM has the major disadvantage of higher cogging torque. Higher cogging torque generates torque ripple in the PMSM motor leading to various problems like vibration, rotor stress, and noisy operation during starting and steady state. The designer should aim to reduce the cogging torque at the design stage itself for overall better performance. Methods. An interior rotor v-shaped web-type PMSM is designed and its performance analysis is carried out using finite element analysis (FEA). Magnet v-angle is optimized with the objective of cogging torque reduction. Performance comparison is carried out between the optimized motor and the initially designed motor with FEA. Novelty. Magnet v-angle analysis is performed on the same keeping all other parameters constant, to obtain minimum cogging torque. The proposed method is practically viable as it does not incur extra costs and manufacturing complexity. Practical value. It is observed that the magnet v-angle is an effective technique in the reduction of cogging torque. Cogging torque is reduced from 0.554 N×m to 0.452 N×m with the application of the magnet v-angle optimization technique.

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Section: Introductionmentioning

confidence: 99%

Optimization of cogging torque in interior permanent magnet synchronous motor using optimum magnet v-angle

Patel,

Doshi,

Mahagoakar

et al. 2023

Electrical Engineering & Electromechanics

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“…These methods can significantly reduce the calculating workloads. On the other hand, the numerical method including virtual work method, Maxwell stress tensor method, nodal force method, and Coulomb virtual work method can well calculate the cogging torque of an arbitrary machine topology but timeconsuming [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Cogging torque minimisation in FSPM machines by right‐angle‐based tooth chamfering technique

Zhu

Wang

2018

IET Electric Power Applications

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Cogging torque in flux-switching permanent magnet (FSPM) machines dominates the whole torque ripples due to its special doubly salient structure and high air-gap PM flux density. In this study, the chamfering method of right angles is utilised in both stator and rotor sides of FSPM machines to suppress the cogging torque. First, an analytical expression of cogging torque, taking the influence of the introduced right angles into consideration, is derived. On the basis of the derived model, the optimal dimensions of right angles are obtained and verified by both finite element analysis and experiments. Besides, the impacts of the proposed technique on phase electro-motive force and electromagnetic torque are also evaluated. The predicted results indicate that the proposed technique can significantly reduce cogging torque in FSPM machines with negligible reduction of average torque.

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