The Eastern Interconnected power system in North America (depicted in Fig. 1), which stretches from the Rockies to the Atlantic Ocean including the eastern provinces of Canada to the North and Florida to the South but excluding the State of Texas, is the largest “machine” engineered by humankind. Every generator or synchronous machine connected to the system operates in synchronism with every o...

Electromagnetic interferences (EMI) deriving from electrical devices may affect implantable cardioverter defibrillators (ICD). Improved algorithms have been developed in order to minimize adverse effects. However, caution should be still recommended in ICD recipients when handling electrical devices. Here we describe the case of an ICD patient with recurrent syncopal episodes due to inhibition ...

Since the first appearance, the fields of electrical machine and drive systems have been continuously enriched by introduction of many important topics. Progress in power electronics, microcontrollers, new materials and advances in numerical modeling have led to development of new types of electrical machines and in field of electrical drives to realization of complex control algorithms. Their ...

This paper analyzes the electromechanical interaction in a flywheel system with a doubly fed induction machine, used for wind farm power smoothing or grid frequency response control. The grid-connected electrical machine is subject to power control, and this can cause it to produce negative damping to the shaft torsional vibration. Resonance must be prevented, and this paper proposes a solution...

The undergraduate electrical machines course belongs to basic courses in electrical en‐ gineering. It is especially crucial for the students studying continuing subjects like electrical drives and control of electrical drives. Thus, a good knowledge of the behav‐ ior of electrical machines in various control modes and various supply and the changeable parameters of machines is needed to underst...

BACKGROUND The viscosity of blood (eta) as well as its electrical impedance at 20 kHz at high shear rate depends on hematocrit, temperature, concentration of macromolecules and red cell deformability. The aim of our study was to investigate the relation between viscosity and electrical impedance in a heart-lung machine-like set-up, because during on-pump heart surgery considerable viscosity cha...

We propose the use of electrical stimulation to generate a new sensorial input to the human body to improve the man-machine interfacing, increasing the communication channels between a robot and the human body. This study focus on the sensation generation for a electromyographic (EMG) prosthetic hand, where the need of “biofeedback” is of vital importance to achieve subconscious control. We use...

When high power electrical machines are required, an increase in the mechanical frequency and/or number of poles is suggested. The analyzed electrical machine produces a high torque density due to a concentrated winding arrangement, in combination with the increased width of the stator teeth. It is a permanent magnet synchronous generator, [1] and is intended for operation at high speed and hig...

A method has been developed allowing fabrication of electronic boards from flexible polymer film by ultrasonic embossing and welding within seconds. A commercially available ultrasonic welding machine and micro patterned tools from aluminum are employed first to generate conductor paths on a flexible polymer film, in a further step, surface mounted devices (SMDs) are assembled and fixed on the ...

A rotating machine is a very complex device that involves electrical, mechanical and control systems. Therefore, the whole representation of a machine requires the specification of electrical and mechanical parameters, as well as control system data. The representation of the mechanical part and the control systems are only needed for low frequency transients [1]. An accurate representation of ...