To address the problem of winding turn-to-turn breakdown faults in 35 kV dry-type transformers wind farms under overvoltage conditions, this paper establishes a simulation model based on structural dimensions and material parameters transformer windings. The distribution were calculated using finite element method. transient processes inside high-voltage coil by constructing multi-conductor tra...

Driving cycles are commonly used to evaluate the fuel efficiency and mileage of internal combustion engine vehicles electric (EVs). To improve EVs, efficient propulsion motors inverters must be employed, particularly at frequently speed torque points driving cycles. In this study, number stator winding turns a tap-change permanent magnet synchronous motor (PMSM) for EV was investigated increase...

the idea of this paper is designing an automatic fault detection system based on fuzzy logic, therefore two signals of pmsm in fault condition are analyzed for inter turn fault detection: current and torque. in this fault type there is some distortion in these signals, but it is not good enough to detecting with fuzzy logic solely, so with combination of wavelet transform and fcm a new method f...

<p>Condition monitoring and on-line detection have attracted several researchers in order to carry out an efficient diagnosis of machine failures. Therefore, the early stage avoids system breakdown reduce maintenance cost. This paper presents a new diagnosic approach detect broken bars end ring faults for squirrel cage induction based on fast Fourier transform analysis applied signature a...

In this paper, a generalized formula is proposed for the selection of number of slots required for n-phase alternative current (AC) machine design and the criterion for selecting the starting points of each phases. The analytical model is verified using a four-pole machine with a 36-slot stator. Each coil of the stator winding of this machine is brought out to a patch board that enables the sta...

Abstract In this paper, a transient model of the faulty machine is developed. The model is referred to a three phase stator winding, while the rotor has been represented by all the meshes allowing for the representation of various faults. The model is based on coupled magnetic circuit theory by considering that the current in each bar is an independent variable. The model incorporates non-sinus...

Both torque ripple and current harmonics are enlarged due to single-phase open-circuit fault of five-phase permanent magnet synchronous motor (FPMSM). Based on chaotic-particle swarm, an adaptive optimization tolerant control algorithm is proposed for the FPMSM current. First, Park Clarke matrices modified in coordinate transformation process. A reduced-order decoupling matrix obtained under st...

The stator winding insulation system is the most critical and weakest part of EMU’s (electric multiple unit’s) traction motor. effective diagnosis for ITSC (inter-turn short-circuit) faults can prevent a fault from expanding into phase-to-phase or ground short-circuits. TCU (traction control unit) controls inverter to output SPWM (sine pulse width modulation) excitation voltage when motor at st...

Winding inductance is an important parameter in determining the performance of electrical machines, particularly those with large inductance variation. This paper investigates the influence of winding inductance variation on the performance of a three-phase three-stack claw pole permanent magnet motor with soft magnetic composite (SMC) stator by using an improved phase variable model. The windi...