Economic Efficiency Measure of Induction Motors for Industrial Applications

An Improved Big Bang-Big Crunch Algorithm for Estimating Three-Phase Induction Motors Efficiency

Nowadays, the most generated electrical energy is consumed by three-phase induction motors. Thus, in order to carry out preventive measurements and maintenances and eventually employing high-efficiency motors, the efficiency evaluation of induction motors is vital. In this paper, a novel and efficient method based on Improved Big Bang-Big Crunch (I-BB-BC) Algorithm is presented for efficiency e...

A Comprehensive Method for Detection of Induction Motors Bearing Faults

In this paper, some deficiencies of previously conducted studies are pointed out. These are including unreliability, dependent to motor and bearing specifications, lack of precision, drawbacks of experimental tests and etc. Here some important works will be reviewed. The proposed method which is based on wavelet decomposition and tracing the trend of statistical features variations, has over...

Non convex technologies and economic efficiency measure with imprecise data

The Stokes efficiency for molecular motors and its applications

– In many experiments it is only possible to load a molecular motor by manipulating the viscous drag from the fluid medium. In these situations, it is not clear how to measure the efficiency of energy transduction. Here we define the Stokes efficiency as the average viscous drag times the average velocity divided by the rate of free-energy consumption. We show that this efficiency is bounded by...

Current Limitation and Speed Drop Minimization in Optimal-Efficiency of Induction Motors

In conventional direct torque control (DTC), the stator flux is usually kept constant by controlling the x-axis component of the stator voltage in the stator flux reference frame. The torque is then controlled by the y-axis component of stator voltage. In this scenario, the stator current does not exceed its permissible value. However, in the so-called optimal efficiency mode, the induction mot...