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This paper propose a torque performance improving method for the bipolar excitation using the commercial three-phase full bridge converter based Switched Reluctance Motor (SRM) motor drive system. In order to control the current in each phase more flexible without any coupled effect among phases, the 2 units or double standard three-phase full-bridge power modules are used. The concept of current...
In this paper an improvement technique for the current distortion of the three-phase switched reluctance motor (SRM) drive system is proposed. The proposed control method is based on the concept of superimposing the DC current into the current control loop of the cascaded double three-phase full bridge based converter. The tested machine is a 1.5 kW, 3-phase, 6-stator-pole and 4-rotor-pole SRM. The...
In this paper a torque capacity improvement method for the three-phase full bridge converter based switched reluctance motor (SRM) drive is investigated. The concept of DC assisted winding operated with ordinary bipolar AC winding for the conventional two-phase excitation is applied and compared to the previously proposed two-phase excitation drive system. The optimal switching angle and amplitude...
Linear variable reluctance (LVR) motors have been a strong candidate to provide linear motion for high-performance applications without mechanical transmission. The goal of this paper is to design and implement an adaptive sliding mode position control of the LVR motor to enhance the system robustness and to achieve high accuracy for high-precision applications. The designed controller consists of:...
The objective of this paper is to model a linear variable reluctance motor using nonlinear magnetic circuit techniques, in order to account for material saturation and mutual coupling. The magnetic circuit approach has the advantages of simplicity and computational efficiency, so it is well suited for rapid performance evaluation at the initial design stage. The accuracy of the magnetic circuit model...
This paper proposes a simple method to estimate the initial rotor position of a three-phase star-connected switched reluctance motor at standstill without position or current sensor. The key principle of the initial rotor position estimation is based on the stator inductance variation related to the actual rotor position. In the proposed method, only two narrow pulse voltage injections are applied...
This paper proposes the predictive delta-modulation current regulator (PDCR) algorithm for use with the switched reluctance motor. The proposed PDCR combines features of the convention delta-modulation current regulator, which has simple structure and does not require any motor parameters, and the predictive current control, which estimates the current error signal of the next sampling period using...
A novel sensorless control for switched reluctance motor (SRM) driven by the three-phase full-bridge inverter is proposed. The most commonly used drive for SRM is the asymmetric half-bridge inverter but its main disadvantage is the cost due to the number of switches and diodes required to realized the drive, in comparison with the much cheaper and more widely available three-phase full-bridge inverter...
In this paper a torque compensation technique for switched reluctance motor (SRM) is proposed. The conventional torque control with a simple current control loop usually causes large torque ripples and affects the speed response and overall performance of the drive system. The proposed torque compensation method is based on a torque estimation technique using the inductance profile and squared value...
This paper proposes a low-ripple instantaneous torque control method based on an adaptive torque sharing function for use with switched reluctance motor. The conventional torque sharing function technique is most effective when the SRM operates in low speed range and its performance deteriorates at higher speed. The proposed adaptive torque sharing function has the active period of each phase that...
In this paper a method to estimate the initial rotor position of the switched reluctance motor (SRM) at the stand still condition is proposed. The proposed method can be implemented by the simple microcontroller based system, and it is not necessary to know the magnetization curves. The impulse gate drive signal is applied and the winding current is detected and its approximate value is used for calculating...
In this paper, a design of the 3-phase, 6-stator-pole and 4-rotor-pole, 15 kW switched reluctance motor for the propulsion system of the electric vehicle is presented. Its performance such as the torque per volume and its efficiency are compared to the machine which is designed based on the conventional design guideline.
The switched reluctance motor (SRM) and drive system is a candidate in various applications including the home appliance. The simple and low cost system with an adequate performance is also one topic to be developed. A speed sensor directly increases the cost and it directly influences the reliability of the system. This paper proposes a simplified variable speed control system for the SRM without...
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