Retracted: Design and control of a high‐speed switched reluctance machine with conical magnetic bearings for aircraft application

Axial flux switched reluctance machines (AFSRMs) exhibit unique characteristics that specify their superiority over other topologies in specific applications. A number of researchers have studied the efficient design and constructed structures in different types of AFSRMs. Each of such studies seeks to produce a motor with improved characteristics. Here, a comprehensive study is performed in AFSRMs, including their design considerations, sizing equations and the structural changes. The sensitivity of parameters for efficient operation is investigated. Also, the comparisons among topologies are provided for each of the identified metrics. This study ends with a comparison summary, which shows the performance indices evaluation of different topologies to utilise in various applications.

Section: Introductionmentioning

confidence: 99%

Axial flux switched reluctance machines: a comprehensive review of design and topologies

Torkaman

Ghaheri

Keyhani

2019

“…The magnetic bearing has the advantages such as low consumption, longevity, and low maintenance requirement, making it suitable for the special occasions such as the high‐speed motor, vacuum facilities super clean sterile room, the machining process and superconductor [1–4]. The power amplifier is the key component of a magnetic bearing system, which is used to amplify the control signals of the coil current needed to generate the magnetic force.…”

Section: Introductionmentioning

confidence: 99%

One‐cycle decoupling control method of multi‐leg switching power amplifier for magnetic bearing system

Liu

Deng

et al. 2019

The traditional current control algorithm of the multi-leg switching power amplifier (SPA) is complicated since the control of different phase currents is intercoupling. To address this problem, a novel control strategy based on one-cycle control is proposed in this study, which can enforce the average current of each phase is equal to the reference in each control cycle. Since it sets the duty cycle of the neutral leg as a constant, this method presents significant advantages such as quick dynamic response, easy control and decoupling of the phase currents. Taking a five-phase six-leg SPA, e.g. the mathematic model of the system was built, the duty cycle of the neutral leg was analysed, the principle of the novel control strategy was introduced, and the detailed implemented process was presented. Thereby, a high-speed switched reluctance motor system using the magnetic bearing is constructed to test this method. Both the simulation and experimental results have demonstrated the simplicity and effectiveness of the proposed method.

“…The switched reluctance machine (SRM) is anticipated to be used in a growing number of applications due to its inherent simple construction, low inertia, high torque‐weight ratio, easy speed control, and strong fault tolerance. Plenty of studies about the controller, driver, and optimisation of the SRM have been reported [1–6]. Before these developments were employed in reality, off‐line simulation was always employed to verify the performance of the control system.…”

Section: Introductionmentioning

confidence: 99%

Hybrid analytical model of switched reluctance machine for real‐time hardware‐in‐the‐loop simulation

Dinavahi

2017

Applications of switched reluctance machine (SRM) are increasing in the industry due to their many desirable features. This study proposes a hybrid analytical model (HAM) of the SRM for the hardware-in-the-loop (HIL) simulation. To obtain satisfactory accuracy, the phase flux linkage is solved by the magnetic equivalent circuit (MEC) method when the stator and rotor poles overlap, and by the space harmonic method (SHM) when the poles do not overlap. The backward Euler and Newton-Raphson methods are used to calculate the exciting current, while the Gaussian quadrature is used to compute the electromagnetic torque in the HIL simulation. The digital hardware implementation of computation components are developed on the field-programmable gate array by exploiting the parallel hardware architecture and fully pipelined arithmetic processing. To highlight the performance of the HAM, the captured real-time results are compared with the off-line transient solution obtained through the co-simulation of Ansys Maxwell ® , Ansys Simplorer ® , and Simulink ® , which model the SRM, drive circuit, and control system, respectively.