scholarly journals Comparative Analysis of Fault-Tolerant Dual-Channel BLDC and SR Motors

Energies ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2489
Author(s):  
M. Korkosz ◽  
P. Bogusz ◽  
J. Prokop ◽  
B. Pakla ◽  
G. Podskarbi
Keyword(s):  
Comparative Analysis ◽  
Direct Current ◽  
Permanent Magnets ◽  
Single Channel ◽  
Fault Tolerant ◽  
Operating Conditions ◽  
Switched Reluctance ◽  
Dual Channel ◽  
Reluctance Motor ◽  
Two Machines

This article presents the results of a comparative analysis of two electronically commutated brushless direct current machines intended for fault-tolerant drives. Two machines designed by the authors were compared: a 12/14 dual-channel brushless direct current motor (DCBLDCM) with permanent magnets and a 12/8 dual-channel switched reluctance motor (DCSRM). Information is provided here on the winding configuration, the parameters, and the power converters of both machines. We developed mathematical models of the DCBLDCM and DCSRM which accounted for the nonlinearity of their magnetization characteristics in dual-channel operation (DCO) and single-channel operation (SCO) modes. The static torque characteristics and flux characteristics of both machines were compared for operation in DCO and SCO modes. The waveforms of the current and the electromagnetic torque are presented for DCO and SCO operating conditions. For DCO mode, an analysis of the behavior of both machines under fault conditions (i.e., asymmetrical control, shorted coil, and open phase) was performed. The two designs were compared, and their strengths and weaknesses were indicated.

scholarly journals Modelling and performance analysis of dual-channel switched reluctance motor

2015 ◽  
Vol 64 (1) ◽  
pp. 89-105
Author(s):  
Piotr Bogusz ◽  
Mariusz Korkosz ◽  
Jan Prokop
Keyword(s):  
Laboratory Tests ◽  
Single Channel ◽  
Switched Reluctance Motor ◽  
Position Angle ◽  
Static Characteristics ◽  
Switched Reluctance ◽  
Dual Channel ◽  
Reluctance Motor ◽  
Channel Mode ◽  
And Performance

Abstract The paper is a presentation of an analysis concerning performance of a 12/8 dual-channel switched reluctance motor (DCSRM). Formulas constituting a base for a non-linear mathematical model of DCSRM are presented. Simulation and laboratory tests were carried out for the motor operating in the dual-channel and single-channel mode. The results of the field theory-based calculations are presented in the form of fluxes in individual phases expressed as functions of currents and a rotor position angle. The results of the computer simulations are shown as the static characteristics of fluxes and the torque as well as voltage, current, and torque waveforms. The results of the laboratory tests are also presented.

scholarly journals The Fault-Tolerant Quad-Channel Brushless Direct Current Motor

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3667
Author(s):  
Mariusz Korkosz ◽  
Piotr Bogusz ◽  
Jan Prokop
Keyword(s):  
Permanent Magnet ◽  
Direct Current ◽  
Single Channel ◽  
Fault Tolerant ◽  
Electrical Energy ◽  
Dual Channel ◽  
Energy Processing ◽  
Active Channels ◽  
Drive Systems ◽  
The Individual

In this study, a permanent magnet brushless direct current machine with multi-phase windings is proposed for critical drive systems. We have named the solution, which has four-stator winding, a quad-channel permanent magnet brushless direct current (QCBLDC) motor. The stator windings are supplied by four independent power converters under quad-channel operation (QCO) mode. After a fault in either one, two, or three channels, further operation of the machine can be continued in triple-channel operation (TCO) mode, dual-channel operation (DCO) mode, or single-channel operation (SCO) mode. In this paper, a novel mathematical model is proposed for a QCBLDC machine. This model takes into account the nonlinearity of a magnetic circuit and all of the couplings between the phases within a given channel, as well as between channels. Based on numerical calculations, the static electromagnetic moment and the coupled fluxes were determined for the individual windings of the variants and work modes being analyzed. A normal work condition can be achieved in the QCO or DCO modes. For the DCO mode, an acceptable case uses a balanced magnetic pull (A and C channels supplied). The DCO A and B type work mode is comparable to the DCO A and C mode with regard to its efficiency in processing electrical energy. The vibroacoustic parameters of this mode, however, are much worse. In fault states, TCO, DCO, and SCO work modes are possible. As the number of active channels decreases, the efficiency of energy processing also decreases. In a critical situation, the motor works in overload mode (SCO mode). Laboratory tests conducted for one of the variants demonstrated that the TCO work mode is characterized by worse vibroacoustic parameters than the DCO A and C mode.

scholarly journals Linear Hybrid Reluctance Motor with High Density Force

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2805 ◽  
Author(s):  
Jordi Garcia-Amorós
Keyword(s):  
Permanent Magnets ◽  
Thrust Force ◽  
Fault Tolerant ◽  
Force Density ◽  
Switched Reluctance Motors ◽  
Permanent Magnet Synchronous Motors ◽  
Element Analysis ◽  
Switched Reluctance ◽  
Electromagnetic Structure ◽  
Reluctance Motor

Linear switched reluctance motors are a focus of study for many applications because of their simple and sturdy electromagnetic structure, despite their lower thrust force density when compared with linear permanent magnet synchronous motors. This study presents a novel linear switched reluctance structure enhanced by the use of permanent magnets. The proposed structure preserves the main advantages of the reluctance machines, that is, mechanical and thermal robustness, fault tolerant, and easy assembly in spite of the permanent magnets. The linear hybrid reluctance motor is analyzed by finite element analysis and the results are validated by experimental results. The main findings show a significant increase in the thrust force when compared with the former reluctance structure, with a low detent force.

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