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The paper focuses on the synchronous reluctance machine rotor design. The rotor's shape in this machine should maximize the flux passing in the d axis while minimizing the flux in its q axis. This can be achieved by designing the rotor to respect the natural flow of the flux in the d axis in order to reduce the magnetic resistance while increasing the insulation in the q axis. The proposed design...
Double Stator Switched Reluctance Machine (DSSRM) is a novel switched reluctance machine with unique magnetic structure and very high power/torque density. In this paper, an analytical design method based on power expression is presented. General rules for selection of critical parameters is also included. Design of a 100kW, three phase DSSRM is presented as a case study following proposed design...
Switched reluctance machine (SRM) is an attractive candidate for traction applications owing to its simple structure, robustness to harsh operating conditions and wide extended speed constant power range. Conventional SRM has higher number of stator poles than the rotor poles. Configurations with higher number of rotor poles using the new pole design (PD) formula, takes SRM one step further in traction...
If a Predictive Torque Controller neglects the saliency of a machine the resulting prediction error contains the rotor angle information. A scheme to extract this information is derived in linear theory and extended for the nonlinear effects of a real reluctance synchronous machine. Measurement results confirm that this saliency based approach without signal injection is able to operate in the entire...
Encoderless Predictive Torque Control without Signal Injection utilizes internal information of a predictive torque controller to obtain the angle of the rotor saliency. When applying this approach to the reluctance machine the circulation of the current caused by the rotation of the strong saliency needs to be compensated by a parameter dependent term. This paper presents a new technique for compensating...
Electromagnetic devices present iron losses which increase with the voltages and induction waveforms harmonics. In this work, three simplified hysteresis losses models are compared with experimental data furnishing useful information about the effectiveness and limitations of each methodology and this is the main contribution of the work. Calculated results for a switched reluctance motor (SRM) are...
The paper deals with the problem of speed and position estimation in SRM drive equipped with hysteresis band current controller. Instead of measured current the observer utilize reference current. The voltage is calculated from switching on-time. A speed observer structure which uses estimated back EMF and current of each phase is presented. The shaft position is integrated from estimated speed signal.
A field-circuit-torque coupled time stepping FEM model is presented in this paper to predict the dynamic performance of switched reluctance motor. The magnetic field analysis adopts direct field-circuit coupled model with stator end-part winding inductance considered, and the couple between electromagnetic system and mechanical system utilizes a numerical iteration. The starting characteristics of...
This paper presents a new method for determination of the rotor position of the switched reluctance machine (SRM). With this it is possible to eliminate the use of the positions encoder, which is usually necessary to control the SRM. The method is based on a machine model, which includes the phase voltage equation. It can be calculated in real time. Additionally for better dynamic performance a new...
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