Design and Fabrication of Dual-Rotor Motors with Axially Extended Stator for Electrified Aircraft Propulsion

Jike, Naoya; Mitsuda, Hiroshi; Kojima, Tetsuya; Hazeyama, Moriyuki

doi:10.1109/icems56177.2022.9983333

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…For the superposition characteristics of the cogging torque in the DRPMSM, the polearc coefficients combination method is proposed. By combining the pole-arc coefficients of the single-side rotor, weakening of the amplitude of the cogging torque of the single side can be realized, the combination of which is shown in (12). By combining the pole-arc coefficients of both the inner and outer rotors, the inner and outer cogging torques can be canceled out with each other, the combination of which is shown in (13); thus, further weakening of the overall cogging torque is realized.…”

Section: Discussionmentioning

confidence: 99%

“…This combination of calculated pole-arc coefficients according to (12) The cogging torque of the outer rotor with pole-arc coefficients combination and without combination is shown in Figure 12. When (αN1, αS1) = (0.82, 0.82), the amplitude of the cogging torque is 14.8 Nm; when (αN1, αS1) = (0.82, 0.61), the base wave of the cogging torque is theoretically 0, and the amplitude of the cogging torque is 4.9 Nm, which is 66.9% lower compared to the equal pole-arc coefficient.…”

Section: Pole-arc Combination Designmentioning

confidence: 99%

“…In general, by comprehensively considering the weight, volume, reliability, efficiency, and torque density, PM motors are considered the most advantageous for electric aircraft propulsion [6][7][8]. The propulsion motor has increasingly adopted outer rotor [9][10][11], dual rotor [12], or axial multi-disk rotor [13,14] structures to enhance the action area of permanent magnet and armature winding, thereby improving the torque density of the motor. In this Energies 2024, 17, 1583 2 of 19 paper, a novel dual-rotor radial flux permanent magnet synchronous motor (DRPMSM) is proposed to achieve the goal of high torque density.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Research on Cogging Torque Reduction of Direct-Drive Type Dual-Rotor Radial Flux Permanent Magnet Synchronous Motor for Electric Propulsion Aircraft

Li,

Feng,

Lei

et al. 2024

Energies

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The direct-drive type high-torque-density motor is one of the most promising solutions of electric propulsion for aircraft. The cogging torque of the direct-drive motor causes torque ripple, vibration, and noise, which seriously affect the stability and reliability of the electric propulsion system for aircraft. In this paper, a novel direct-drive type high-torque-density dual-rotor radial flux permanent magnet synchronous motor (DRPMSM) is proposed, and its cogging torque is weakened by permanent magnet shape design and pole-arc coefficient combination. An eccentric and chamfered permanent magnet shape is proposed, and the influence of eccentric distance and chamfer angle on cogging torque is clarified. Through the pole-arc coefficient combination design of the inner and outer rotors of the DRPMSM, the cogging torques of the inner and outer rotor are phase reversed, thus further reducing the total cogging torque of the DRPMSM. By employing the response surface method, a mathematical model is established for the cogging torque of the DRPMSM in relation to the pole-arc coefficients, chamfer angle, and eccentric distance of the permanent magnets. The parameters that minimize the cogging torque of the DRPMSM are obtained using a genetic algorithm. A prototype is manufactured according to the optimized parameters, and experimental results validate the correctness of the theoretical analysis and the effectiveness of the optimization design method.

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Section: Discussionmentioning

confidence: 99%

Section: Pole-arc Combination Designmentioning

confidence: 99%