The role of remote astrocyte (AC) reaction to central or peripheral axonal insult is not clearly understood. Here we use a transgenic approach to compare the direct influence of normal with diminished AC reactivity on neuronal integrity and synapse recovery following extracranial facial nerve transection in mice. Our model allows straightforward interpretations of AC-neuron signalling by reduci...

Most existing power  converters and industrial motor drive systems draw non-sinusoidal currents from the supply. Non-sinusoidal currents contained harm harmonics disturb the power supply which it causes serious concern for reliability. Other equipments that use the same power supply are adversely affected. This paper suggests the operation and performance of a new modified AC/DC converter that ...

Abstract This paper investigates a Luenberger flux observer with speed adaptation for a direct field oriented control of an induction motor. An improved method of speed estimation that operates on the principle of speed adaptive flux and current observer has been proposed. An observer is basically an estimator that uses a plant model and a feedback loop with measured stator voltage and current....

This article presents an alternative ac–ac converter topology and its control for low-speed three-phase induction motor drives fed from single-phase ac mains. The proposed matrix based drive system eliminates the dc link capacitor, thus facilitating high power density reliability. primary challenge in controlling a <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http...

This letter presents a feasible method for electrical ac power source burn-in test. The proposed architecture consists of two power stages. It consumes a lesser amount of energy than the conventional method and provides extra flexibility for the test load. To implement the proposed idea, a simple control strategy and system design is presented in this letter. A case study for an adjustable-spee...

This paper presents novel active filter for mitigation electromagnetic interference (EMI) and other adverse effects of pulse width modulation (PWM) inverter-fed AC motor system. An active filter proposed and devised for this system is characterized by sophisticated connection of two small separate filters, capable of mitigating all the adverse effects. This paper provides high frequency models ...

Power electronic inverters are widely used in various industrial drive applications. To overcome the problems of the limited voltage and current ratings of power semiconductors devices, some kinds of series and/or parallel connections are necessary. Recently, the multilevel inverters have received more attention in literature due to their ability to synthesize waveforms with a better harmonic s...

This paper deals with the problem of controlling doubly-fed induction machines (DFIM). A nonlinear model of the whole controlled system, including the DFIM and the associated AC/DC rectifier and DC/AC inverter, is developed within the Park coordinates. A multi-loop nonlinear controller is developed, using the backstepping design technique. The controller is formally shown to meet its objectives...

To improve the computational efficiency of numerical methods for calculating ac loss in HTS motor, a new method called ‘Boundary field method’ is proposed this article. This combines strength ANSYS and COMSOL, which can reduce complexity modeling computation time. In article, three finite-element based models, as case studies, were developed 100-kW superconducting induction motor. Model A model...

This paper presents a power factor corrected (PFC) bridgeless (BL) buck–boost converter-fed brushless direct current(BLDC) motor drive as a cost-effective solution for low-power applications. An approach of speed control of the BLDC motor by controlling the dc link voltage of the voltage source inverter (VSI) is used with a single voltage sensor. This facilitates the operation of VSI at fundame...