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This paper presents a complete development of the complex-vector (CV) state-space (SS) representation of squirrel-cage induction machine (IM) with an inter-turn short-circuit (ITSC) in one phase of the stator winding. The final representation of the model can be decoupled in two modes: “Common Mode” and “Differential Mode” and it is the presented in its simplest form. From this faulty model a CV and...
A new HPC technology was developed in terms of the domain decomposition along time-axis, namely time decomposition method (TDM), to solve all time steps (or a subdivision of all time steps) simultaneously to achieve better scalability, instead of solving a transient problem sequentially one time-step by one time-step. For practical applications, we further introduced two TDM models: one is the Periodic...
In this paper, an analytical model in the dq reference frame is developed to recognize the steady-state of the self-excited reluctance generator, considering no-load and resistive load conditions. A fast method to estimate the minimum capacitance requirements is proposed. Experiments are carried out to verify the analytical results. After that, attention is paid on the capability of self-excitation...
This paper develops a methodology for the analysis of asymmetric AC systems using complex vectors. This methodology is based on the well-known symmetrical components modeling that is regularly applied to the steady-state analysis of asymmetric systems. It is shown that this steady-state methodology is a subset of a more general framework that has applicability to transient analysis. From the derived...
Two efficient methods are introduced to speed up the transient process for reaching the AC steady state. The techniques are suitable for virtually all poly phase AC machines. In one of the methods, the transient DC flux linkage component is eliminated by applying an additional voltage component within a small time interval for each phase winding. The flux linkages at the end of this interval are the...
Nowadays, with the development of More-Electric/All-Electric aircraft and hybrid/pure electric vehicles, the high reliability of motor servo system is required. This paper presents a little magnetically coupled structure dual three-phase permanent-magnet synchronous machines (PMSMs). Considering the mutual inductance between two sets of windings, a linearized model for a kind of dual three-phase PMSMs...
This paper proposes a method for parameter estimation of three-phase induction machines based on the concept of instantaneous impedance and using only stator voltages and currents acquired during a no-load startup transient. Basically, the method estimates the parameters using an optimization algorithm which aims to reduce the error between estimated and measured instantaneous impedance. The algorithm...
The 48 V power supply system has been recently introduced by German automobile companies due to an increasing electric power demand in electrified vehicles. For the 48 V electrified vehicles, typically, 48 V and 14 V buses are used to supply power to 48 V and 14 V loads. In this paper, a multiple voltage bus power conversion system, to drive multiple motors/actuators based on a single inductor multi...
This paper offers a new method to analyze the performance of three-phase synchronous machines operating with an unsymmetrical stator winding due to cut-out and bypassed coils. The resulting unsymmetrical current distribution in the stator winding tends to produce overheating of parts of the winding at full load and torque pulsations. Thus, the main objective of this study is to determine the maximal...
This paper investigates the effect of the rotor slots (bars) number of a three phase squirrel cage induction motor on the motor performance under broken bar fault condition. Two motors have been investigated at full load condition in healthy bars, one broken bar and two broken bars operations. The first motor has 24 stator slots and is investigated with rotor slots 20, 29 and 32 and the second motor...
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