Abstract

This paper describes the development of a compact, high-efficiency and high-power traction permanent magnet motor utilizing reluctance torque for electric vehicles.The “Salient SPM” motor has salient between adjoining permanent magnets exposed on the rotor surface. This structure enabled magnet weight reduction by 35% compared with the interior permanent magnet (IPM) motor which generated equivalent torque.Insulation between magnet and rotor yoke reduced the eddy current loss by up to 1 kW compared with a non-insulated motor.As a result, maximum torque of 238 Nm and maximum power of 60 kW were obtained with this motor. The motor gave power density of 1.8 kW/kg, and torque density of 7 Nm/kg. At the same time, the overall motor-inverter efficiency reached 93% average drive efficiency when running in UDDS mode.

References

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Author (organization or company)

• Kazuaki TAKIZAWA（Tochigi R&D Center）
• Tomoyuki ITOH（Tochigi R&D Center）
• Hiroyuki SATOH（Tochigi R&D Center）

Publication Information

Article of Honda R&D Technical Review Vol.12 No.2 (105 - 112)

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Citation Information