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Line-Start Permanent Magnet Motors with Variable Coil Turns

机译：具有可变线圈匝数的线启动永磁电动机

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摘要

Line-start permanent magnet motors (LSPM) have significant advantages in efficiency and power factor compared to regular induction motors. However, the poor starting torque and synchronization capability are the key issues, and this influences LSPM motors used in many applications. In this paper, coil turns-changing method is proposed to relieve the contradiction between starting and steady-state performance, and improves starting torque and synchronization capability. In order to further remove the magnet braking torque, a novel coil turns-pole-changing method is also proposed to remove the contradiction. The permanent magnet braking torque can be eliminated, in additions, the starting-state and steady-state performance can be nearly decoupled totally. Furthermore, these two turns-changing methods can also start successfully even when network voltage is low. Finite element analysis is carried out to validate the big starting torque and strong synchronization capability.
机译：与常规感应电动机相比，线启动永磁电动机（LSPM）在效率和功率因数方面具有显着优势。但是，启动转矩和同步能力差是关键问题，这会影响许多应用中使用的LSPM电机。本文提出了一种线圈匝数转换方法，以缓解起动与稳态性能之间的矛盾，提高起动转矩和同步能力。为了进一步消除磁体的制动力矩，还提出了一种新颖的线圈匝极变换方法来消除该矛盾。消除了永磁体的制动转矩，此外，启动状态和稳态性能几乎完全脱开。此外，即使在网络电压低的情况下，这两种匝数转换方法也可以成功启动。进行了有限元分析，以验证大启动转矩和强大的同步能力。

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