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This paper presents a method aiming to detect different inter-turn short circuit fault severity by analyzing zero-sequence voltage for a new five-phase fault-tolerant fractional-slot concentrated winding interior permanent magnet motor (FTFSCW-IPM). To eliminate the effect of common mode voltage (CMV) in single DC power supply application, fault severity analysis is conducted based on an open-end...
Multiple coupled circuit modeling (MCCM) of squirrel-cage induction motors (SCIMs) uses winding function or modified winding function theory to simulate performance of healthy and faulty SCIMs. This paper applies MCCM to simulate SCIMs with rolling-element bearing localized faults. This is done by defining appropriate instantaneous air gap functions. Simulation results show specific frequency components...
In order to improve the reliability of the system, a dual-redundancy high-voltage brushless DC motor based on 270V is designed. Methods of motor fault detection and diagnosis are studied. The fault signal is analyzed by Fourier transform. For the Fourier transform, a fault detection using wavelet transform method is proposed. The current is determined to the fault detection signal based on the motor...
This paper studies the fault tolerant control schemes for the active neutral-point-clamping three-level (ANPC-3L) inverters under different fault conditions. The fault conditions include the device-level faults in one inverter leg, the inverter-leg faults, and the open-circuit faults in load. The impacts of faults in devices, inverter leg and load on output voltage levels and mid-point voltages of...
According to the requirements of contactor life test, by using PLC and touch screen technology to design a new type of test equipment. The key point of the electrical life test is voltage switching. In order to solve this problem, contactor or silicon has been used as ATS. Whether the contactor or silicon can not solve the high voltage and high current switching problem. One way to solve this problem...
A novel open-circuit fault diagnostic method for dual-winding fault-tolerant permanent magnet (DFPM) motor drive system is proposed and investigated. The proposed open-circuit fault diagnostic method uses the normalized currents' average values and average absolute values to formulate the diagnostic variables and incorporates the merits of them. Due to the normalized diagnostic variables and the introduction...
This paper presents a stator inter-turn fault detection approach for the inverter-fed induction motor (IM) based on the Teager-Kaiser energy operation (TKEO). The zero sequence voltage under the excitation of the inverter switching harmonics is analyzed, and the characteristic frequencies of the inter-turn fault in the inverter common-mode voltage (CMV) is derived. In this way, the monitoring sensitivity...
Dual-winding fault-tolerant permanent magnet (DFPM) motor offers the advantages of high power density, high efficiency and high fault-tolerance. In this paper, a new open-circuit fault diagnosis of the DFPM motor drive for aerospace applications is proposed and investigated. The proposed open-circuit fault diagnostic strategy can realize real-time detection and localization of single and multiple...
This paper presents a detailed analysis of the dynamic behavior of Doubly Fed Induction Generator (DFIG) under asymmetrical voltage dips. Finite element analysis (FEA)for 1.5MW DFIG, back-to-back converter, DC-Link, step up transformer, voltage sag generator(VSG) and the control algorithm have been considered and coupled together by using a coupled simulation. The effect of asymmetrical voltage dips...
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