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Improving the performance of Switched Reluctance Motors (SRMs) such that they become a viable alternative to PM motors has been an active area of investigation. In this paper, a low voltage, high power, double-stator SRM (DSSRM) is proposed for washing machine application. First, an appropriate configuration for the motor structure is introduced and theoretically designed to be used in this application...
This topology presents simple and economical method of power factor correction for driving High-Brightness LEDs based on Boost converter. Nowadays, HB-LEDs are discussed as a noticeable lighting instrument because of their great Longevity, multicolored, and Compatible with Environment. It works by sampling of the input and output voltage and current in the boost converter, whereupon, improving the...
In this paper a custom three phase Switched Reluctance Motor (SRM) with six stator and four rotor salient poles (6 by 4) was designed, simulated and analyzed and it's produced torque, phase inductance, flux linkage and some other characteristics were obtained by the 3D Finite Element Method (FEM). Then a novel 7-layer 4 by 4 Multilayer SRM (MSRM) with the same volume was designed and under the same...
Different methods have been proposed for torque ripple control in Switch Reluctance motor (SRM). In order to overcome this problem, some of the methods are based on changing in the structure and the geometry of the motor and others are performed by using control methods. This paper describes the structure and principles of operation in SRM and then introduces some controlling methods for these motors...
In weak grid systems that wind power has a significant portion of the power, connecting wind generator output to the network is an important issue. Direct AC to AC converters have become an attractive option for this purpose. They are replacing conventional AC-DC-AC systems and also being used in various industrial applications. These direct converters have more adaptability between input and output...
In this paper, a novel two-layer 6/4 three-phase Switched Reluctance Motor/Generator (SRM/G) is designed, simulated, fabricated and tested in the laboratory to produce electrical energy using natural, renewable and variable speed energy resource. The proposed two-layer SRM/G (TLSRM/G) consists of two magnetically independent stator and rotor sets. Each stator layer includes six salient poles with...
The presented paper introduces a low cost converter for Switched Reluctance Motor (SRM) control. Many types of converters are implemented to drive SRM. Generally Asymmetric Bridge Converter (ABC) is selected in which two switches are used per phase to excite the phase winding. The upper transistor in ABC faces a problem in gate-source voltage which prevents SRM phase to be excited properly. Some methods...
A new sensorless circuit for Switched Reluctance Motor (SRM) is designed, constructed and tested in this paper. The circuit uses three steps to control the SRM. One of them is used in motor starting. The other one controls the motor in low speed and the third one is used in high speed. These steps are implemented by an inexpensive AVR microcontroller chip. An asymmetric bridge converter is used to...
Torque ripple is an inherent problem of SRM which should have been decreased. Several methods have been presented for torque ripple reduction in Switch Reluctance Motor (SRM). Some of them are based on changing the structure and the geometry of the motor. The other methods are done by utilizing control techniques. This paper introduces a 6 by 4 three-phase SRM as a normal mode structure which is designed...
In this paper a Multilayer Switched Reluctance Motor (MSRM) is introduced, simulated and controlled. The presented MSRM which has five 4 by 4 magnetically independent layers produces more torque with less torque ripple rather than custom SRMs. The motor is rotated by exciting each layer and repeating the algorithm. Since independent layers, there is no isolation problem in the presented MSRM. The...
The performance of the Switched Reluctance Motors (SRMs) in different applications has widely been investigated by various studies. Therefore, the influences of some abnormal conditions have also applied significant orientations on the research areas. One of the most observed faults is the stator winding short circuit which may leads to produce the unbalanced distribution of magnetic field. In this...
In this paper, a new method for sensorless starting and controlling of Switched Reluctance Motor-Generator (SRMG) is presented. The method uses Amplitude Modulation (AM) technique. The controller is used to control a new SRMG by two separated layers of 4 stator poles and 2 rotor poles. A DSP processor generates digital signal firstly which is then changed to low voltage sinusoidal signal by a digital...
In this paper some new multilevel inverter topologies, their characteristics and also block diagram are presented. They are essentially based on cascade multilevel inverter with the same number of switches and separated dc sources. The paper is illustrated that increasing the number of output waveform levels in the topologies reduces the low order harmonics and also the total harmonic distortion which...
The efficiency of thermal power plants is rather poor. In the power plants, before starting a new cycle, the steam which is used to spin the turbine in the last cycle has to be condensed to water at first and then reheated to change into steam again. This process is an important thermodynamic rule and needed for an efficient heat to electricity conversion cycle in the power plants, so, in addition...
This paper presents a method for improving hybrid electric vehicles (HEVs) performance and efficiency, using Bi2Te3 and Si0.7Ge0.3 thermoelectric (TE) materials. At first, the structure of the HEV and the two main types of it are explained. Then, TE generators and materials characteristics are discussed. After that, the TE generator equations and also the important notes about how to choose a TE material...
Nowadays switched reluctance machine is very ideal for many applications because of its simple configuration and having very high power density at low-cost. This paper analyzes and compares two different types of switched reluctance motor/generator (SRMG) and their applications. The proposed novel motor/generators consist of two magnetically independent stator and rotor sets (layers), where each stator...
This paper presents the comprehensive geometric parameters design of a Homopolar Double Salient-Pole brushless dc motor. The under consideration configuration is designed based on having double layers of the stator/rotor and a stationary field assisted coil placed between them. The design methodology employed enabled a swift initial design of the lamination geometric parameters such as air-gap length,...
This paper presents a novel structure for two phase switch reluctance motor. The proposed novel motor consists of two magnetically independent stator and rotor sets (layer). Each stator set includes same eight salient pole with windings wrapped around them, and each rotor set includes four salient poles which two poles of rotor have arc same as stator poles(30deg) and other rotor poles have bigger...
This paper presents the efficiency estimation of a double salient-pole Homopolar Brushless dc Generator in order to determine the optimum operation. For the under consideration generator an assistant dc field is replaced with permanent magnet in the rotor. Varying the amplitude and direction of the current in the field coil can control the generated output voltage to a level between zero volts and...
In this paper, two Switched Reluctance Motors (SRM) with two-layer configuration are investigated to analyze an efficient method to reduce torque ripple in multilayer SRMs. The method named Rotor Shifting Technique (RST) is simply shifting a rotor of one set respect to other set. In the proposed method the RST is used to increase the overlap between rotor and stator poles. One of the presented motors...
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