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This paper describes the mathematical modeling of the high-output magnet-free synchronous reluctance motor (SynRM) with rated power 1100 W, rated speed 3000 rpm, frame size 63 and IE4 efficiency class. The weight of the designed SynRM class is almost 50% less than the weight of the serially produced induction motor of IE3 efficiency class at the same rated power and speed. The SynRM prototype is being...
This paper describes the mathematical model and the experimental study of the magnet-free synchronous reluctance motor (SynRM) of IE5 efficiency class (rated power is 1500 W, rated speed is 3000 rpm). Also the IE5 SynRM has been compared to the serially produced induction motor (IM) of IE3 efficiency class. The measured rated efficiency of the developed IE5 SynRM is 90.7 % which is significantly greater...
In this paper a new mathematical model of Single-Phase Flux Reversal motor (FRM) steady-state modes applicable for its optimal design is described. A new embodiment of FRM designed for fan or pump applications is proposed. Efficiency and energy efficiency class of FRM is higher than of an interior permanent-magnet motor. At power less than rated power the efficiency difference becomes greater which...
This paper is devoted to the comparative study of performance data of a 0.75 kW variable speed electric drive with synchronous reluctance motor (SynRM) and induction motor (IM) in a pump application. The experimental data on the IM and SynRM drives efficiency within a wide range of working modes are used to assess the power consumption. The working modes of motors are calculated with the help of nameplate...
The work provides a theoretical and experimental study on the iron loss of an energy efficient synchronous reluctance motor without starting winding powered by a frequency converter. The concepts of basic and additional load losses in the magnetic system of this motor are introduced. Based on the results of the theoretical study, a no-load test procedure was proposed for the motor under consideration,...
Advantages of flux reversal motor (FRM) compared to other types of motors designed for high speed applications such as simplicity of the rotor, reliability and low cost are described in the paper. An angular grinder with high speed FRM has been developed and tested. Experimental data are provided. The efficiency of the developed angular grinder is higher than the serially produced angular grinders...
This paper describes some aspects of the mathematical modeling and the experimental study of the magnet-free synchronous reluctance motor (SynRM) of IE5 efficiency class (rated power is 750 W, rated speed is 3000 rpm, rated efficiency is 89.5%). The proposed mathematical model allows minimizing the number of the boundary problems which is to be solved and allows calculating power, losses, torque waveform...
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 article is devoted to the comparative research of performances of controlled drives with a synchronous reluctance motor (SynRM) and with an induction motor (IM) in a pump application. In this study the performances of the motors are represented as iso efficiency maps. The issues include the calculation of the payback time of commuting of the IM drive to the SynRM drive. It is shown that the application...
This paper presents a Flux Reversal Machine designed for the fan applications with rotor and stator cores made of Soft Magnetic Composite materials (SMC FRM). The advantages of SMC FRM such as the short flux paths, easiness of inducing the winding MMF even when the number of poles is high and the wasteless production technology allow designing cheap and high effective motors. The SMC FRM has high...
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...
The article describes a mathematical model of a linear induction motor on the basis of detailed equivalent circuits. This model performs calculations of both electromagnetic steady-states and transients in LIM, has considerably fewer degrees of freedom than the FEM-based models, which is especially important when performing optimization calculations, designing, and analyzing dynamic modes. In this...
This paper compares Flux Reversal Machines designed for high speed applications with rotor and stator cores made of Laminated Steel and Soft Magnetic Composite (LS FRM and SMC FRM). The advantages of SMC FRM such as the short flux paths, the wasteless production technology and the winding weight reduction allow us to design cheap and high effective motors. These advantages of SMC FRM are proved with...
The paper presents a variety of issues related to the development of a highly efficient electric drive having a synchronous reluctance motor. Results are presented on the comparison experiments investigating the characteristics of induction and synchronous reluctance motors. Conclusions are made concerning the economic feasibility of using a synchronous reluctance motor for a number of industrial...
This paper presents a new Flux Reversal Machine (FRM). Its rotor and stator cores are made of Soft Magnetic Composite materials (SMC). The SMC FRM production technology based on the press molds makes it possible to organize waste-free production and thereby to reduce production costs significantly, to remove the end windings, to reduce weight and size, and to improve energy efficiency.
In this paper a new Flux Reversal machine is described. An angle grinder development with this machine is considered. The experimental results of the angle grinder investigation are presented. A FRM model based on a set of magnetostatic boundary problem is proposed. In postprocessing the model allows us to estimate the various types of losses. The FRM simulation using the model is presented.
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