Search results for "Motors"

Tuning active Brownian motion with shot noise energy pulses

2009

The main aim of this work is to explore the possibility of modeling the biological energy support mediated by absorption of ATP (adenosine triphosphate) as an energetic shot noise. We develop a general model with discrete input of energy pulses and study shot-noise-driven ratchets. We consider these ratchets as prototypes of Brownian motors driven by energy-rich ATP molecules. Our model is a stochastic machine able to acquire energy from the environment and convert it into kinetic energy of motion. We present characteristic features and demonstrate the possibility of tuning these motors by adapting the mean frequency of the discrete energy inputs, which are described as a special shot noise…

Experimental Implementation of an Enhanced Field Oriented Control Strategy for Induction Motors Using a Low-Cost ATSAM3X8E Microcontroller

2020

This paper presents a low-cost Micro Controller Unit (MCU) implementation of an enhanced Field Oriented Control (FOC) technique that takes into account the non-linearity of the ferromagnetic material. The algorithm is applied to a three-phase 5.5 kW Induction Motor (IM) and experimentally carried out by means of an ATMEL ATSAM3X8E microcontroller. The effectiveness of the enhanced control strategy is verified by comparing the dynamic performances of the electric drive with those obtained by means of a traditional FOC technique. For this purpose, an experimental test bench is set up for the implementation of the enhanced FOC technique. Finally, the technical and economic features of the simp…

Interior Permanent Magnet Synchronous Machine Drive Powered by Fuel Cell for Automotive Applications

2020

Electric vehicles represent an optimal solution for the reduction of pollution in urban areas. In particular, the Fuel Cell (FC) technology is a promising solution especially for its charging times and zero CO2 direct emissions. The paper addresses the design and performance study of an Interior Permanent Magnet Synchronous Machine (IPMSM) drive powered by fuel cell for automotive applications. The IPMSM drive is powered by the use of 5,5 kW FC unit and it is composed of two DC-DC power converters and one inverter. In detail, a test bench has been carried out for the evaluation of the performances of each IPMSM drive conversion stage. Moreover, in order to simulate automotive working condit…

The role of the effect of manufacturing tolerances on a tubular linear ferrite motor

2015

Electric machines are often designed without considering workmanship and materials tolerances. Their manufacturing process involves a series of steps, starting with raw materials and ending with the machine assembly. In each of these steps occur deviations due, for instance, to mistakes in positioning tools or to the tolerances in the electrical and magnetic characteristics of the materials. These deviations may cause unwanted parasitic effects such as torque ripple, losses or acoustic noise. Such effects have to be considered especially in machines used in industrial drives for high performance applications. Moreover the tolerances in the magnetic materials have a considerable effect on th…

Characteristics of the polymer transport in ratchet systems

2010

Molecules with complex internal structure in time-dependent periodic potentials are studied by using short Rubinstein-Duke model polymers as an example. We extend our earlier work on transport in stochastically varying potentials to cover also deterministic potential switching mechanisms, energetic efficiency and non-uniform charge distributions. We also use currents in the non-equilibrium steady state to identify the dominating mechanisms that lead to polymer transportation and analyze the evolution of the macroscopic state (e.g., total and head-to-head lengths) of the polymers. Several numerical methods are used to solve the master equations and nonlinear optimization problems. The domina…

A Nonlinear Control of Synchronous Reluctance Motors (SynRM) Based on Feedback Linearization Considering the Self and Cross-Saturation Effects

2019

This paper proposes a nonlinear controller based on feedback linearization for Synchronous Reluctance Motors (SynRM) drives that takes into consideration the self and cross-saturation effects. Such control technique permits the dynamics of both the speed and flux loops to be maintained constant independently from the load and the saturation of the iron core. The proposed technique has been tested experimentally on a suitably developed test set-up.

SIA „Mūsa Motors Rīga” iekšējas komunikācijas analīze

2022

Bakalaura darba tēma ir “SIA “Mūsa Motors Rīga” iekšējas komunikācijas analīze”. Pētnieciskā problēma ir izpētīt kā un ar kādiem komunikācijas instrumentiem un kanāliem uzņēmumā „Mūsa Motors Rīga” tiek organizēta iekšējā komunikācija un vai uzņēmuma darbinieki ir apmierināti ar to. Bakalaura darba mērķis ir iepazīties ar uzņēmuma „Mūsa Motors Rīga” iekšējo komunikāciju un darbinieku viedokļiem par iekšējo komunikāciju uzņēmumā, lai sasniegtu mērķi bakalaura darba tiek izvirzīti sekojoši uzdevumi: izpētīt akadēmisko literatūru par sabiedriskām attiecībām, organizāciju, organizācijas komunikāciju un iekšējo komunikāciju; aprakstīt pētījuma metodoloģiju – interviju un aptauju; empīriski noskai…

What makes a champion? : motorcycle world champions' recipe for success

2011

This thesis explores what are the factors that impact the success in motorcycle racing. The subject is relevant to investigate since there have not been many scientific researches of motorcycle sport and the factors behind the success. Fifty-four motorcycle World Champions from 16 different countries and representatives of the six most successful motorcycle sport countries answer to the research question: “What makes a champion in motorcycle sport?” It is also investigated how the society influences the success in motorcycle sport and how the federations and clubs could improve their training programmes. The empirical data was collected by interviewing the experts in the field of elite-leve…

Waving the Pixelated Chequered Flag

2023

Feedback Linearization Based Nonlinear Control of SynRM Drives Accounting for Self- and Cross-Saturation

2022

This article proposes a nonlinear controller based on feedback linearization (FL) for synchronous reluctance motor (SynRM) drives which takes into consideration the magnetic saturation. The proposed nonlinear FL control based control technique has been developed starting from the theoretical definition of an original dynamic model of the SynRM taking into consideration both the self- and the cross-saturation effects. Such a control technique permits the dynamics of both the speed and axis flux loops to be maintained constant independently from the load and the saturation of the iron core in both constant flux and variable direct axis flux operating conditions. Finally, sensitivity of the pe…