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On the basis of establishing mathematical model of induction machine, the simplifying assumption of two-dimensional plane finite element model was proposed, and Dirichlet and main boundary conditions were defined. The speed governing of induction machine was realized using back-to-back voltage-fed frequency converter. The continuous output direct voltage value of three-phase non-controlled rectifier...
This paper presents a set of system equations of a dual stator induction machine (DSIM) and a new approach for online parameter identification including its verification through simulation and measurements. An uneven current share between the two three-phase systems of a DSIM is used to determine machine parameters online.
Progress in field of electrical machines diagnosis and artificial intelligence contributed to increased interest in new methods of diagnosis in field of electrical motors. The paper focused on three numerical techniques: finite element analysis, signal analysis and artificial neural networks in diagnosis of a squirrel cage induction machine under inter-turn short circuit in stator windings. A field-circuit...
This paper presents a new slip compensation method for the traditional scalar control (V/f) of induction motors. Based on the level of q-axis component of stator current, the steady-state slip of motor speed is estimated by means of flux-oriented current tracking that is usually applied in vector control. The method features both the simplicity of scalar control and improvement on the performance...
Induction motor is the most popular load in the transportation systems like Hybrid vehicle, Traction and Propeller. Now-a-days most of the researches are done on hybrid vehicle. It is very important to study about the cost effective, efficiency and quality on induction motor performance. For easy transportation purpose the weight of the motor is low and similarly for the performance of the motor the...
In this paper, the use of an adaptive control method for an induction motor is described. Using the conventional adaptive control method, it is possible to stably estimate the inverse time constants (both primary and secondary) during the powering mode. However, it becomes unstable during the regenerating mode. To solve this problem, there is a method that changes the adaptive control gain in the...
The article considers the calculations of the induction motor with ring windings (IMRW) and ceramic insulation and a classical induction motor with a squirrel cage. IMRW is the newest design that was invented by “Electrical machines” department of UrFU. IMRW and serial induction motor have the same overall dimensions and output power. The electromagnetic calculations are made by “ANSYS Maxwell”. Comparative...
This paper proposes a design procedure of induction motor for Liquefied Natural Gas (LNG) carrier applications, implementing dual fuel electric propulsion system. For the purposes of the analysis, a preliminary motor design stage is performed by using classical analytical formulae and a parameterization of the design is introduced. In a next step, a critical design stage is developed, based on a geometry...
This paper presents a comparative investigation of four predictive torque control (PTC) strategies for two-level three-phase inverter fed induction motor drives. Among the considered PTC strategies, three novel PTC schemes based on bus-clamping techniques are developed. The proposed bus-clamping PTC (BC-PTC) schemes are founded on the basis of the clamping of each stator phase during 60°-interval...
To reduce energy consumption, a novel motor system is proposed using two individual current control technologies involving a multiphase inverter. The multiphase inverter technology comprises two sets of 3-phase windings connecting two 3-phase inverters. Each set of coils connecting the 3-phase inverters forms a rotating field. Two windings allow the resultant field to generate a rotating field of...
In this article it is considered the electromagnetic torque calculation of low power induction motor with ring windings (IMRW), designed for using in radioactive waste recycling equipment, in environments with high levels of radiation and temperatures over 200 degrees by dint of “ANSYS Maxwell”. The design of the magnetic stator system has not axis of symmetry and provides layered organization of...
The short list of requirements to the traction electric drive has to satisfy is highlighted. The topologies and operation principles of two- and three-level voltage source inverters fed a traction induction motor are presented. The brief survey of the frequency converters faults and malfunctions is carried out. The transient modes of electric drives under transistor short-circuit fault and transistor...
In this paper the issues of bearings' condition monitoring of induction motors having a squirrel-cage rotor is considered. Experimental results and their analysis are presented. The works were during the test of induction motor at rated nominal mode, with bearings: healthy and alternatively with two faults, which had defects inner and outer part of bearing frame.
The use of converters to feed the motors instead of the direct-on-line supply has increased the need to understand the losses of the induction machine in different operating points. Most of the earlier studies have focused on the losses with the nominal supply frequency while this study covers most of the frequency-torque plane below nominal values. A 15 kW standard squirrel-cage machine's losses...
A method for provision of operability of a variable-frequency electric drive with vector control in the presence of breakages in the induction motor stator power electric circuit is presented. Analysis of electromagnetic torque orthogonal components in an analytical form has revealed that the influence of breakages, causing induction motor stator circuits asymmetry, on the electric drive operating...
Induction motor rotor designs are investigated in this paper to reduce secondary winding harmonic losses in hybrid electric vehicle (HEV) applications. The induction motor is more and more popular to use for the traction drive, but its' secondary winding harmonic losses are significantly higher than the usual when having high frequency and high power density in the HEV application. Thus, the major...
To produce an ultra-lightweight motor, we propose a technology that converts electrical energy between the stator and rotor using magnetic coupling. Magnetic coupling causes electromagnetic resonance between the respective multiphase windings of the stator and rotor. Electromagnetic resonance coupling technology allows electric motors to convert energy without magnetic cores, significantly reducing...
This paper proposes a modified predictive direct torque control (PDTC) application specific integrated circuit (ASIC) with a fuzzy controller for eliminating sampling and calculating delay times in a motor drive. A finite delay time not only degrades the control quality but also increases both torque and flux ripples in the motor drive. The proposed PDTC ASIC with a fuzzy controller (fuzzy PDTC) not...
This paper presents the results of the development and pilot study of the highly efficient synchronous reluctance motor. The results include a detailed comparative analysis of the performance values of various modes of the developed synchronous reluctance motor and the series induction motor of the same power made in the same housing. These motors heating and other parameters have been compared. The...
Induction motor modeling using MATLAB package with aim of finding a most usable and simple compensation algorithm of asymmetry effect on the motor moment was conducted. The following ways was reviewed: insertion of back EMF in stator circuit with such magnitude, frequency and electrical angle that minimized stator negative-sequence current; rising stator impedance by external resistance insertion;...
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