A new dual stator winding induction machine drive is described in this paper. The proposed consists of a standard squirrel-cage rotor and with two separate windings wound for dissimilar number poles. Each fed from an independent variable-frequency variable-voltage inverter. offers such advantages as speed sensorless operation, better reliability, more flexibility to manipulate the resultant torque-speed curve motor. In drive, zero-speed operation achieved by independently controlling sets...

In this paper, a new detailed mathematical derivation of the squirrel-cage induction machine d-q model is introduced. The based on coupled magnetic circuit theory and complex space-vector notation takes into account actual nonsinusoidal rotor bar distribution. It shown for first time that, given structural symmetry machine, both stator circuits can be modeled by simple set only four differential equations, i.e., model. More importantly, number equations does not depend bars, valid even if...

This article develops a high-fidelity physics-based modeling approach to predict the voltage stress and current distributions in individual conductors of electric machine windings driven by pulsewidth modulation (PWM) voltages. is first step better understand how PWM voltages winding insulation inverter-driven machines. The finite element (FE) models this account for frequency-dependent parasitic parameters, are capable investigating impact wire positions on hence conductors. A stator core...

<div class="section abstract"><div class="htmlview paragraph">A battery electric vehicle (BEV) employs a traction inverter to control motor. One popular configuration is make HV directly connected the input of motor inverter. As result, maximum voltage limited by state charge (SOC) battery. When low speed and power are limited. This limitation can be solved using traditional boost converter-based However, this approach has several disadvantages. The winding terminals see PWM...

This article studies the voltage stress in random-wound machine windings under steep-fronted excitations from inverter drives. The this includes overshooting voltages between any two conductors windings, and individual stator ground wall. may accelerate insulation degradation inverter-fed machines compared to traditional AC machines. A high-fidelity finite element (FE) model was used analyze of predict during switching transients. Experimental validation conducted using a purpose-made...

This paper studies voltage stress in complex machine windings under steep-fronted excitations from inverter drives. Electrical this includes overshoots between any two conductors and the stator. can accelerate insulation degradation inverter-fed machines compared to that traditional ac machines. A high-fidelity finite element (FE) model is used individual parasitic parameters of winding structure. The able predict or a conductor stator ground wall during switching transients. structure...

The objective of this article is to set forth a computationally efficient methodology quantify the effects and assess relevance geometric material uncertainty on permanent magnet synchronous machine (PMSM), based nonlinear finite-element model (FEM). Our follows theory Gaussian process regression principal component analysis build inexpensive surrogate that replaces FEM. Uncertainty quantification sensitivity studies focus electromagnetic torque, flux linkage, core loss PMSM.

This article investigates what parameters affect the voltage propagation pattern in inverter-driven electric machine windings and presents mathematical analysis of this with experiment verification. work provides a thorough understanding behavior under surge excitations. First, high-fidelity finite element (FE) models were constructed various combinations factors random-wound stranded windings. These include types parasitic capacitances, inductances parallel strands, different wire layouts...

This paper presents a detailed evaluation and comparison of surface PM interior synchronous machines with concentrated distributed windings. The are compared based on optimal designs having the same stator OD, stack length, identical magnet volume, equal air-gap length peak current. maximum open circuit voltage is also included in trade-off analysis constrained unconstrained BEMF considered. study shows that for IPM motor exhibits much higher torque density than SPM. because an reluctance...

This paper develops detailed models for predicting the voltage and current distributions in individual conductors of electric machine windings driven by pulse width modulation (PWM) inverter drives. is first step to better understand how PWM excitation stresses winding insulation inverter-driven machines. A high-fidelity finite element (FE) model was developed account frequency-dependent parasitic parameters. The capable investigating impacts that wire positions have on parameters, hence...

This paper studies the pulse voltage propagation inside machine windings driven by power inverters. The fast switching of devices in inverter generates pulses with high dv/dt and induces overshoots at winding terminals. Those can accelerate degradation insulation system. work analyzes how steep-front distributes along during transients over a wide range operation conditions. Circuit analysis is conducted for each transition events an entire fundamental cycle. An 8-pole interior permanent...

This work strives to apply the in-slot direct cooling technique in electric machines and optimize design improve machine performance both electromagnetic (EM) aspects. The directly removes heat from heating source, but requires extra spaces slots that possibly reduce of machine. It needs an overall evaluation considering EM thermal performances achieve optimal for systems. utilizes a thermal-network based numerical modeling approach combined with finite element (FE) simulations evaluate...

This paper introduces a methodology for analyzing the behavior of power electronic converters using probability analysis based on distribution function (pdf). The is developed both numerical and analytical techniques. pdf verified against results from computation Monte Carlo simulations under wide variety operating conditions different modulation schemes. proposed has advantage more comprehensive representation actual utilization devices in real world usage, such as used electrified...