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In this paper a novel axial-flux segmented rotor switched reluctance motor (AFSSRM) with a stator sandwiched by two rotors with a particular form of the segments is presented. The machine has magnetic short paths with no flux reversal and the active magnetic parts are made of soft magnetic composites. An in-wheel AFSSRM, specially intended for direct drive of light motorcycles, is designed. Electromagnetic...
This paper proposes, as a control scheme of a switched reluctance motor, back electromotive force control (back-EMF control for the abbreviation) in order to reduce the vibration and the acoustic noise of a switched reluctance motor. In back-EMF control, the winding current is kept around the current reference without switching the power devices in a corresponding phase in the drive circuit by utilizing...
The following paper presents new fault tolerant converter topology for switched reluctance machines, that features multilevel output along with its advantages. The principle of operation in normal as well as in the fault conditions are described. Previously proposed modulation strategy including DC bus voltage balancing scheme is applied and tested in measurements. Low cost, discrete implementation...
The output torque of switched reluctance motor (SRM) can be controlled by flowing an appropriate current through the armature windings. In general, current hysteresis control has been applied. However, there is a problem that acoustic noise generated from the SRM at the driving tends to become large. Then, there are reports that PWM control has been applied to suppress the acoustic noise. This paper...
The teaching of electrical machines and drives requires a new approach to make them more attractive to students, to address and overcome the limitations of time and resources that are usual in electrical engineering programs. The target of this new approach is that after following the course students should have a consistent knowledge and skills on electric machines and drives that gives them the...
This paper discusses the implementation of a real-time model of a switched reluctance motor drive for which the parameters of its magnetisation curve are represented by the data in a look-up table. A method of cubic interpolation has been applied for the look-up table approximation in order to provide a high accuracy and realistic performance of the modelled motor drive. The model structure has been...
The paper focuses on the results of modeling electric drive with switched reluctance motor. The model is based on linearized representation of motor phase flux changing. Motor saturation is taken into account. Operating model algorithm is described. The model was tested with a simple control system designed with hysteresis current controller. The transients were examined, the power balance tests were...
This paper deals with the variable structure control system which implements sensorless control for two-phase switched reluctance drive. The sensorless control method based on flux linkage estimation is considered. The method of the automatic angle adjustment was proposed for the optimization of the motor efficiency on various speeds and loads. Finally the sensorless control strategy for zero and...
The paper proposes a high speed switched reluctance (SR) drive for aircraft applications, covering the demand of more electric aircrafts (MEA) and defending the particular benefits of this machine technology against others, such as permanent magnet synchronous generators. An appropriate topology of electrical machine and power converter for a high speed DC distribution grid is selected. Firstly, the...
The switched reluctance motor (SRM) is a low cost motor option. However it has lower power factor than competing motors and this has led to the incorrect perception that the power electronics are expensive. This paper shows that using the inverse of power factor as a proxy for converter rating and hence cost is incorrect; in particular device utilization and device switching losses are just as relevant...
This paper describes a modular, integrated and low-cost kinetic energy storage system (KESS), its electrical characterization as well as its future integration and operation in a microgrid within the scope of a project called MIRED-CON (Microgeneration with Renewable Sources and its control). This project aims to develop, using the power microgrid installed in the CEDER (Soria, Spain), an advanced...
Commonly known analytical prediction methods for winding loss in switched reluctance machines provide comparatively inaccurate results but are very fast. Finite element analyses, however, yield rather exact results but at high computational cost. This paper introduces harmonic superposition as a third approach that promises sufficiently accurate loss estimations at low computational cost. At that...
Switched reluctance machines with its uncomplicated structure, low cost, high reliability and fault tolerance, is struggling to gain higher market share almost in all electric machinery utilities. Its simplicity encouraged researchers to apply a wide variety of classic and intelligent control techniques. These techniques are used to control the speed and torque via appropriate determination of switching-on...
Don scientists developed switched reluctance drives for Russian Navy fleet. Main propulsion motor (power 2 MW, rotation speed 200 rpm) for sea rescue tug boat; set of auxiliary switched reluctance drives (power from 1.1 kW to 32.5 kW) for hoists, pumps and compressors of diesel electric submarine Project 677 (code “Lada”); mockup sample of integrated inductor electric drive for subwater apparatus...
The cost-efficient switched reluctance machine is highly appealing to the automotive industry. In this application acoustic noise is a crucial criterion, which is usually addressed during the design process. However, parasitic effects, such as rotor eccentricity, are normally not a design target but only a finding during the test of the prototype. This paper deduces a theory that mathematically describes...
Practical experience has shown that parasitic effects such as rotor eccentricity can have crucial influence on the performance of switched reluctance machines. Strong eccentricity can even be a knock-out criterion as it potentially causes additional acoustic noise and increased bearing wear. Nowadays only very few publications consider simulation methods without online finite-element analysis regarding...
In this paper, a sensor less operation of a Switched Reluctance Motor drive is proposed. Here, the commutation of switched Reluctance motor is done without the use of a position detector. A method based on the calculation of phase inductance from the flux value is used in this. It is ensured that the switching of each phase winding takes place during the positive slope of the inductance profile. The...
This article presents the main technical solutions for electrical transmission of a tractor. The tractor electric drive is based on a switched-reluctance electric drive. The structure of electromechanical transmission is reviewed. Modelling of the main operation modes of the electric drive and calculation of its basic parameters were carried out in the MathCad and MATLAB programs. To verify the electric...
This paper proposes the new inverter topology which improves the motor efficiency of switched reluctance motor (SRM) for electric vehicle (EV). The SRMs generate the regenerating power even in motoring mode, and the regenerating power flows in both directions of battery and coils. The proposed inverter I — IV can control the flows of regenerating power to improve the motor efficiency.
The three magnetization modes in which the magnetization region is shifted according to load based on a linear torque equation are proposed. Efficiency comparison test of the proposed method and a voltage PWM control method is conducted with a real system.
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