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The equivalent circuit parameters of an interior permanent magnet synchronous machine (PMSM) vary under different operating conditions due to magnetic saturation and temperature rise. Knowledge of accurate machine parameters is of paramount importance for high performance PMSM control and condition monitoring. Therefore, this paper presents a novel parameter estimation method, which employs both the...
Accurate information of permanent magnet (PM) flux linkage is of significance to high-performance control and condition monitoring of permanent magnet synchronous machines (PMSMs). During machine operation, the PM flux linkage can vary due to temperature rise and saturation. Thus, this paper investigates how temperature rise and saturation influence the PM flux linkage under different operation conditions...
In a window of $\boldsymbol{N}$ elements, if $\boldsymbol{k}$ old elements are replaced by $\boldsymbol{k}$ new elements during a step, then $({\boldsymbol{N} - \boldsymbol{k}})$ old elements are still maintained in the new instance of the window. In this work, we show that not all such elements need to be maintained in the future instances of the sliding window for exact computation of a rank-order...
This manuscript presents an analytical model of eddy current losses in an interior permanent magnet motor (IPM) due to carrier frequency and harmonic current in maximum torque per ampere (MTPA) control operation. The influence of pulse width modulation (PWM) and motor design parameters has been considered to evaluate the increase in losses due to carrier harmonics based on PWM ripples and harmonic...
A novel torque ripple minimization approach for interior permanent magnet synchronous machine (IPMSM) considering magnetic saturation is proposed in this digest. The inductance variations due to magnetic saturation have a great influence on the torque ripple minimization for IPMSMs. Thus, a voltage injection based on-line parameter identification scheme is proposed to estimate the dq-axis inductances,...
In this paper, a novel 3-D sub-domain analytical model is developed to determine magnetic flux distribution in a squirrel-cage induction machine with skewed rotor bars under no-load condition. The analytical method is based on the resolution of 3-D Laplace and Poisson's equations in cylindrical coordinates using separation of variables method to calculate the magnetic vector potential for corresponding...
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