Interturn short-circuit fault, also known as turn is a common fault in electric machines, which can cause severe damages if no prompt detection and mitigation are conducted. This article proposes method for permanent magnet machines based on current residual. After the impact of first analyzed simplified mathematical machine model to assess signature, finite-element developed obtain healthy behavior. The residual between measured estimated currents by with same applied voltages contains...

An interturn short-circuit fault in the stator winding of an electric machine, denoted as turn fault, has been recognized one most severe faults permanent magnet machines, which require a swift and reliable detection, order to implement appropriate mitigations. The asymmetry brought by is widely used for detection. However, similar features also emerge less high-resistance connection (HRC) may lead incorrect identification. In this article, more exclusive detection method with ability...

Health monitoring and fault detection are becoming more important in electrical machine systems due to the increasing demand for reliability. Winding turn is a common permanent magnet (PM) machines, which can cause severe damages requires prompt mitigation. High resistance connection fault, results phase asymmetry may also occur but does not require immediate shutdown. Thus, apart from detection, classification between two faults required. In this paper, new technique detecting classifying...

An accurate rotor position signal is quite necessary for high-performance control of switched reluctance motor (SRM). In general, the faults may lead to abnormal operation, which deteriorates reliability drive system. Thus, it vital but still a challenge develop strategy that can diagnose and in an autonomous way. this paper, square-wave edge prediction-based proposed diagnosis recovery. Integrated with fault-tolerant method, SRM system maintain reliable operation under different fault...

Most permanent magnet (PM) machines are driven by inverters with pulse-width modulation (PWM) voltages. The currents contain high-frequency (HF) components which inversely proportional to machine inductance. HF PWM ripple can be used detect a turn fault that gives rise changes in features of these under conditions analyzed. A bandpass filter is designed extract the selected sideband components, and their root-mean-square (rms) values measured. rms all phases compared. It shown current ratios...

A new procedure for determining the asymptotic stability with probability one of random-time-delay-controlled quasi-integrable Hamiltonian systems is proposed. Such a system formulated as continuous–discrete hybrid and random time delay modeled Markov jump process. three-step approximation taken to simplify such system: (i) randomly periodic approximate solution property used convert control into without but parameter; (ii) limit theorem transform parameter (iii) stochastic averaging method...

This article analyzes the electromagnetic and thermal behavior when insulation deteriorates, leading to short-circuit (SC) faults in a triple redundant 9-phase permanent magnet-assisted synchronous reluctance machine. It defines critical resistance at which temperature faulted region reaches cut-through of material determines minimum maximum bounds for all possible faulty volumes by three-dimensional analysis. suggests thresholds fault detection mitigation action order prevent complete...

Sensorless control at low speed is a challenge for Switched Reluctance Motor (SRM). In this paper, new high frequency signals injection based method proposed. Since the stator inductance varies with rotor position θ its saliency, responding current contains information. With band pass filter, component of can be acquired then calculated through series coordinate transformations and filters. An important feature that doesn't need to know parameters motor easy implementation. Besides, it...

Most permanent magnet (PM) machines are driven by inverter with pulse-width-modulation (PWM) voltages. The resultant phase current contains high frequency (HF) components, based on which, a new technique to detect turn fault is proposed. machine model at established and the HF components analyzed. A bandpass filter used extract selected sideband their root-mean-square (RMS) values measured. ratio of RMS in two adjacent phases calculated. Both individual variance 3 ratios studied testified...

In this paper, nonlinear stochastic optimal control of multi-degree-of-freedom (MDOF) partially observable linear systems subjected to combined harmonic and wide-band random excitations is investigated. Based on the separation principle, problem a system converted into completely one. The dynamic programming equation for then set up based averaging method from which law derived. To illustrate feasibility efficiency proposed strategy, responses uncontrolled controlled are respectively...

This paper proposes a full-cycle unsaturated inductance estimation based initial rotor position and sensorless starting scheme for switched reluctance motor. To calculate the inductance, high frequency voltage pulses are injected in non-exciting phases. Under medium or load conditions, considering electromagnetic saturation effects conduction regions of each phase, simple polynomial transfer model is introduced to calculated saturated incremental into phase inductance. Using three-phase can...

Winding turn fault and high-resistance connection (HRC) will lead to different consequences require mitigation actions. In this study, the differentiating features between a HRC are analysed compared in three-phase surface-mounted permanent magnet machine fed by inverter with pulse-width-modulation voltages. The resultant high-frequency components both voltages currents utilised for detection classification based on impedance ripple current, without requiring modifications or interface...

A novel sensorless control method of Switched Reluctance Motor (SRM) based on crossing point transformer electromotive force (EMF) and motional back (BEMF) is proposed in this paper. The position can be derivate from inductance mode, it regarded as a reference to estimate rotor position. estimated by detection the special positions for each electrical cycle. experimental results show that requires no additional hardware complex computation or memory storage.

The mathematical models of the surface-mounted permanent magnet synchronous machine (SPMSM) in both healthy and turn fault conditions are utilized to generate current residual with same voltage input. features analyzed consideration model accuracy. 2 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">nd</sup> harmonic positive rotating dq reference or dc component negative can be extracted as indicator. To estimate that is more accurate robust...

This paper analyzes the electromagnetic and thermal behavior when insulation deteriorates, leading to short circuit faults in a triple redundant 9-phase permanent magnet assisted synchronous reluctance machine (PMASynRM). It defines critical resistance at which temperature faulted region reaches cut-through of material determines minimum maximum bounds for all possible faulty volumes by 3D analysis. suggests thresholds fault detection mitigation action order prevent complete failure with...

A probability‐weighted optimal control strategy for nonlinear stochastic vibrating systems with random time delay is proposed. First, by modeling the as a finite state Markov process, problem converted into one of jump mode. Then, upon limiting averaging principle, force approximately expressed summation associated different modes system. using method and dynamical programming each mode can be readily obtained. To illustrate effectiveness proposed control, two degree‐of‐freedom system worked...

This paper presents a new method to estimate rotor position indirectly for 12/8 switched reluctance motor (SRM). In this method, searching windings and main are wound on stator together. The structure of is designed reduce induced voltages caused by windings. High frequency voltage applied the signal derived from high signals. can be injected standstill speed in thus it operate wide range. proposed implemented SRM experimental results demonstrate validity method.

The ability to detect turn-to-turn short-circuit faults (turn-faults) is an important aspect of ensuring reliable machine operation. Turn-faults create a low impedance path within the winding, resulting in large fault currents, creating winding hotspots and increased rate insulation degradation. This causes propagate increasing severity, until reaching point catastrophic failure. Early detection turn-fault allows mitigation strategies be put place, reducing amount damage caused machine. As...