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The miniaturization and high efficiency of permanent magnet synchronous motors (PMSMs) are desired in numerous applications. PMSMs have a number of design parameters in order to enable miniaturization and high efficiency. One such parameter is the ratio of the external diameter to the stack length (D/L). In this paper, we examine the effect of D/L on torque and efficiency in outer rotor surface permanent...
In many applications that use IPMSMs, the miniaturization of the motor is desired from the viewpoint of space saving and manufacturing cost reduction. To achieve this miniaturization, it is necessary to make the motor's torque density and power density high. In this paper, the influence of the ratio of the outer diameter to the stack length (D/L) on the maximum torque and power in IPMSMs is examined...
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