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- W2243164358 abstract "Spoke-type interior permanent magnet (IPM) machines are an attractive topology for high-performance electric motors, especially designed for vehicle traction applications. In this paper, a special design for a spoke-type IPM motor is presented to enhance motor flux-weakening capability in the operation over a wide speed range. The proposed design consists of a simple and robust mechanical device that includes radially displaceable rotor yokes, connected to the shaft by means of springs. At high speed, the centrifugal force prevails over the elastic one due to springs, causing the mobile yokes to displace radially and establish a partial magnetic short circuit between PMs. This increases PM leakage flux and consequently reduces the air-gap field. As a result, a mechanical flux weakening effect is achieved at high speed, which helps significantly to reduce the demagnetizing d-axis current to be injected by the inverter, along with the related copper losses and demagnetization issues. The proposed design is investigated in this paper using an analytical model whose parameters are computed by finite-element analysis. The effectiveness of the solution being set forth is successfully proven by some testing on a laboratory prototype. Experimental results are compared with analytical predictions showing a satisfactory accordance." @default.
- W2243164358 created "2016-06-24" @default.
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- W2243164358 date "2015-04-01" @default.
- W2243164358 modified "2023-09-26" @default.
- W2243164358 title "Modeling, Analysis, and Testing of a Novel Spoke-Type Interior Permanent Magnet Motor With Improved Flux Weakening Capability" @default.
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- W2243164358 doi "https://doi.org/10.1109/tmag.2014.2357225" @default.
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