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In this paper, design of auto transformer based 18 Step AC-DC converter fed vector controlled Switched Reluctance motor drive is presented and its Matlab /Simulink model is given. The design procedure for proposed autotransformers shows the flexibility in the design for making it a cost effective replacement suitable for retrofit applications, where presently a six pulse diode bridge rectifier is...
Abstract-Due to nonlinear electromagnetic characteristics of Switched Reluctance Motor (SRM), as well as complexity of voltage and current waveforms, it is of great difficulty to control SRM optimally and compute power losses. A novel optimal control strategy of Non-Energy Returnable Current Chop (NERCC) was proposed, which is suitable for high power SRM drive. This method can obtain current waveform...
This paper presents a new method for indirect sensing of rotor position in a switched reluctance motor using bifilar windings in a resonant circuit. The detection method stems from the fact that the changes in sine wave magnitude produced in a RLC resonant circuit by motor variable phase inductance can be used to detect the rotor position. The proposed method is applicable at standstill as well as...
This paper presents a new sensorless method for controlling a Three-Phase Switched Reluctance Motor utilizing bifilar drive. In this method rotor position is extracted by analyzing the current results of injected high frequency diagnostic pulses to the motor windings. The proposed method is based on the dependency of the phase current slope that achieved from the diagnostic pulses to the rotor position...
The purpose of this paper is the investigation of different parameters on the performance of high efficiency switched reluctance drives. At first a rough design estimation of the geometry is calculated by hand. After that the switched reluctance machine is designed with PC-SRD, a computer-aided software package developed at SPEED laboratory. To reach the best performance for a given cross-section...
In switched reluctance machine (SRM), the power density is increased by using full pitched winding instead of concentrated winding. It is reported that segmented switched reluctance machine (SSRM) using full pitched winding can give 40 - 75 % higher torque than conventional SRM for the same frame size. This increase in torque is due to the increase in aligned inductance. However, full pitch winding...
This paper briefly reviewed the technical characteristics about the Switched Reluctance Drive system(SRD) and the application history of related products. A comparison was made for the technical characteristics between SRD and AC variable frequency speed regulation system. In the end, some new products of SRD were introduced.
This paper presents a novel method to estimate the rotor position of a new field assisted switched reluctance motor at standstill and also low speeds. In this method, a high frequency sine wave signal is applied to the field assisted winding on the stator and then the phase of induced signals on each phase winding is monitored to detect the rotor position at standstill. It then continues to sense...
This paper presents a battery powered switched reluctance motor (SRM) drive constructed using two three-phase intelligent power modules (IPMs). It possesses integrated driving and charging capabilities. In driving mode, five legs of the two IPMs are used to form the SRM modified Miller converter, and the front-end DC/DC boost converter is constructed by the remaining leg. Proper current and speed...
In this paper, two kinds of control strategies applied to a switched reluctance motor (SRM) with 12/8 teeth configuration have been analyzed based on a three-phase bridge converter. The first strategy is that the three phase SRM windings have to be connected in delta, with a separate diode connected in series with each phase, which is possible to control the voltage and current of each phase independently...
A new approach to automatic control of excitation parameters for the switched reluctance motor (SRM) is presented. A turn-on and turn-off angles play important roles in developing electromagnetic torque in SRM. The value of excitation angles are usually variable and depend upon the motor speed and other parameters of the inverter that excites the SRM. As the motor speed increases the shape of the...
Switched reluctance motor (SRM) drive has a remarkable characteristic, which makes it attractive for high-speed in low voltage applications. In this paper, a new drive circuit from the bridge family which uses resonant circuit during discharge period is presented. The new topology provides faster rate of current discharge. The basic control strategy for a switched reluctance motor drive circuit is...
As switched reluctance motors (SRM) generally offer a simple and robust design, they are very suitable for an aircraft main engine fuel pump drive which needs to be actuated by fault tolerant drives. Based on analytical comparison the merits and demerits of some different machine topologies including redundancies, a six phase 12/8 fault-tolerant SRM is proposed and designed for fuel pump drive application...
The static characteristics of a 3-phase 12/8 switched reluctance motor (SRM) are measured by indirect method. Based on the measured flux linkage characteristics, the nonlinear mathematical model of SRM is established in Matlab/Simulink environment; the control strategy and algorithm of switched reluctance drive (SRD) are developed. The simulation results are in accord with the results by finite-element...
This paper presents a fuzzy adaptive control scheme for automatic control of excitation angles in switched-reluctance motor (SRM) drives. A turn-on and turn-off angles play important roles in developing electromagnetic torque in SRM. The value of excitation angles are usually variable and depend upon the motor speed and other parameters of the inverter that excites the SRM. As the motor speed increases...
The applications of switched reluctance machines in electrical vehicles, as well as in wind and hydro turbines, are gaining increasing attentions from the industries because of their low cost, low inertia and simple construction. In this paper, a low cost high-side power supply for the gate driver of switched reluctance machine is presented. With the use of a bootstrap technology, the high-side circuit...
A linear switched reluctance motor (LSRM) based position tracking system and its control aspect are presented in this paper. Based on modeling analysis of the drive system, two reduced order controlled models are developed with different time scales, referred as mechanical subsystem and electrical subsystem. Two controllers are respectively designed for the two subsystems. Simulation results demonstrate...
Rotor position sensing is an essential part of switched reluctance (SR) motor drive in order to synchronize the pulses of phase current with the period of rising inductance of the proper motor phase. This paper presents a complete and novel method to detect the rotor position at standstill and also low speeds in a new field assisted switched reluctance motor. In this method, a high frequency sine...
This paper presents the development of a front-end converter and its control for a battery powered switched-reluctance motor (SRM) drive. In motoring mode, the converter is operated as a dc-dc boost converter to establish dynamically boostable and well-regulated dc-link voltage from battery. The digital control schemes of boost converter and motor drive are implemented using a common digital signal...
The linear switched reluctance motor (LSRM) has never been widely used for direct drive motion control applications partly due to its nonstandard drive circuit. In order to obtain the optimum converter configuration, five topologies are analyzed in detail and compared based on their overall performance in this paper. Experimental result is then obtained from a prototyping system that uses the dSPACE...
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