Early detection and diagnosis of incipient faults are desirable to ensure an improved operational effectiveness of induction motors. A novel practical method of detection and classification for broken rotor bars, using motor current signature analysis associated with a neural network technique is developed. The motor-slip is calculated via a new simple and very rigorous formula, based on (f s −...

Numerous studies examine the electrical and mechanical, internal exterior problems of induction motors separately. However, this type machines is also susceptible to several combined faults which affect it at same time. The aim work study firstly effects mass imbalance with supply voltage unbalance in a state, specifically its on stator currents (distortion waveform augmentation current factor ...

The dynamics of a recurrent inhibitory neural loop composed of a periodically spiking Aplysia motoneuron reciprocally connected to a computer are investigated as a function of the time delay, tau, for propagation around the loop. It is shown that for certain choices of tau, multiple qualitatively different neural spike trains co-exist. A mathematical model is constructed for the dynamics of thi...

This paper represents the performance of a squirrel-cage High Temperature Superconducting Induction/ Synchronous Motor (HTS-ISM) based on nonlinear electrical equivalent circuit. The structure of the HTS-ISM is the same as that of the squirrel-cage type induction machine, and the secondary windings are fabricated by the use of the HTS wires. It has already been shown that based on the experimen...

Condition monitoring and preventative maintenance are essential for reliable efficient operation of permanent magnet synchronous machines driven by inverters. There two types industrial inverter drives available: field oriented control direct torque control. Their compensation nature structure distinct and, therefore, the condition approach designed former may not be applicable to latter one. I...

Recently, motor current signature analysis has been widely considered for fault detections due to its simplicity, availability, and cost-effectiveness. The rotor asymmetry (RAF) is the most common that occurs in induction machines. It extremely challenging detect RAF indices occurred at vicinity of supply frequency. Moreover, load torque oscillations (LTOs), which appear as a sinusoidal phase m...

We provide an analysis of current and future algorithms for signature and encryption in the EMV standards in the case where a single key-pair is used for both signature and encryption. We give a theoretical attack for EMV’s current RSA-based algorithms, showing how access to a partial decryption oracle can be used to forge a signature on a freely chosen message. We show how the attack might be ...

Abstract Transcranial anodal stimulation (tDCS) over primary motor cortex (M1) improves dexterous manipulation in healthy older adults. However, the beneficial effects of anodal tDCS in combination with motor practice on natural and clinically relevant functional manual tasks, and the associated changes in the digit contact forces are not known. To this end, we studied the effects of 20 min of ...