Magnet Temperature Estimation in Variable Leakage Flux Permanent Magnet Synchronous Machines Using the Magnet Flux Linkage

D. F. Laborda, David Diaz Reigosa, Daniel Fernández, Kensuke Sasaki, Takashi Kato, F. Briz
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引用次数: 4

Abstract

Permanent magnet synchronous machines (PMSMs) performance is highly dependent on the Permanent Magnets (PMs) temperature. Knowledge of the PMs temperature is therefore of great importance both for control and monitoring purposes. An increase in the PM temperature during motor operation, decreases PMs magnetic flux strength and consequently the PMSM torque production capability, eventually causing irreversible demagnetization of the PMs; for the case of variable leakage flux PMSMs (VLF- PMSMs), it will affect the variable leakage property of the machine, which will place additional concerns on the machine control. This paper proposes a PM temperature estimation method for VLF-PMSMs from the PM flux linkage. PM flux linkage is obtained from the response of the machine to a small-amplitude, low frequency, square-wave signal (either voltage or current). The signal is injected on top of the fundamental excitation, allowing on-line temperature estimation without interfering with the operation of the machine
基于磁链的变漏磁永磁同步电机磁体温度估计
永磁同步电机(PMSMs)的性能在很大程度上取决于永磁(PMs)的温度。因此,了解pm温度对于控制和监测目的都非常重要。电机运行过程中,电机温度升高会降低电机的磁通强度,进而降低电机的转矩产生能力,最终导致电机的不可逆退磁;对于泄漏磁通可变的永磁同步电动机(VLF-永磁同步电动机),它将影响电机的可变泄漏特性,这将给电机控制带来额外的关注。提出了一种基于永磁磁链的vlf -永磁同步电机的永磁温度估计方法。永磁磁链是由机器对小幅度,低频,方波信号(电压或电流)的响应获得的。信号被注入到基本激励的顶部,允许在线温度估计而不干扰机器的操作
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