A totally enclosed traction motor using a permanent magnet synchronous motor

Abstract

SUMMARYVentilated-type traction motors are widely used for railway vehicles. However, they require overhauls to clean inside them. In addition, they are a major noise source in railway vehicles. To solve these problems, we propose a totally enclosed-type traction motor using a permanent magnet synchronous motor that has the same weight power ratio as that of a conventional ventilated-type traction motor. In this paper, we report the test results of the proposed motor. The test results demonstrate that the temperature rise values are within its limit and the noise level is decreased by 10 dB compared to conventional motors.

Design and Efficiency Evaluation of a High‐Efficiency Induction Motor for Railway Traction

“…Table 1 gives the specifications of the IM-P. For reference, it also lists the IM-C specifications and the specifications of a permanent magnet synchronous motor (PMSM-P) [2] prototyped using similar specifications.…”

“…However, motors that use the recently developed permanent magnet synchronous motors as traction motors often have an efficiency of about 97% [2,3].…”

“…Induction machines for inverter drives are now widely used in traction motors, and their efficiency is usually about 92%. However, motors that use the recently developed permanent magnet synchronous motors as traction motors often have an efficiency of about 97% [2,3].…”

Parameter measurements for permanent magnet synchronous machines

“…In that case, the q-axis component of the current and flux linkage can be neglected. Therefore, the d-axis reactance can be determined by (11) or (12). In testing set (c), the d-and q-axis reactance is determined from the current, voltage, power factor, and torque angle δ during the loaded test [7].…”

“…6. The tested motor is a 140 kW totally enclosed PMSM [12]. According to the figure, the semi-input is increasing linearly to the 2nd power of internal electromotive power, and iron-loss resistance can be determined from the slope.…”