Maximum efficiency operation of switched reluctance motor by controlling switching angles

Abdulkadir, M.; Yatim, A.H.M.

doi:10.1109/peds.1997.618695

Cited by 10 publications

(5 citation statements)

References 4 publications

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“…The conventional switched reluctance machine (SRM) has a simple and rugged construction and therefore it is suitable for both highspeed operation and operation in different environments due to the absence of windings and PMs on the rotor [13][14][15][16][17]. The stator windings are physically, magnetically and electrically independent of each other, which effectively reduced the risk of phase-to-phase fault [18][19][20][21][22].…”

Section: Switched Reluctance Generatormentioning

confidence: 99%

Electromagnetic‐based maximum output power control in new two‐layer BLDC generator using optimal control of turn‐on and turn‐off angles in variable speed applications

CheshmehBeigi

Karami

Rouzbehi³

2019

IET Electric Power Applications

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In this study, by using the electromagnetic field analysis, the design of brushless DC generator with a novel construction and controller, appropriate for variable speed applications, is proposed. In the proposed machine, unlike the conventional structure, an assisted DC field coil is employed instead of permanent magnet excitation to provide a regulated voltage. Results of the electromagnetic field analysis show that including the DC field coil increases the controllability of the flux in different machine parts which provide a regulated terminal voltage in a wide speed range appropriate for variable speed applications. Moreover, the maximum power point tracking is achieved by controlling the DC field current along with producing optimal turn-on and turn-off angles for stator winding using the electromagnetic analysis based on optimal finite element analysis. Also, an appropriate controller is designed to control the DC field coil current. To verify the actual performance of the proposed configuration, a 1.5 Kw machine is manufactured and tested followed by the discussion on results. The obtained experimental results are in good agreement with the results of the electromagnetic analysis which confirm the maximum power trackability and robust output voltage regulation of the proposed conversion system under different shaft speeds and load conditions.

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Section: Switched Reluctance Generatormentioning

confidence: 99%

Electromagnetic‐based maximum output power control in new two‐layer BLDC generator using optimal control of turn‐on and turn‐off angles in variable speed applications

CheshmehBeigi

Karami

Rouzbehi³

2019

IET Electric Power Applications

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“…Techniques to raise the efficiency of a switched reluctance drive by optimizing control parameters are described in [10] [ 11 ] and [ 12]. These optimizations are based on modifications in the torque-sharing process that result in specific currentprofiles.…”

Section: Loss Commutationmentioning

confidence: 99%

“…In [10] calculation that can be processed on-ine. In contrast [11] and [12] present methods that are based on off-ine determinations of the switching angles. These calculated angles can be modified on-line based on the reference torque and actual speed to increase the efficiency.…”

Section: Loss Commutationmentioning

confidence: 99%

Multiphase Torque-Sharing Concepts of Predictive PWM-DITC for SRM

Brauer

Hennen

Doncker

2007

2007 7th International Conference on Power Electronics and Drive Systems

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Instantaneous torque control for SwitchedReluctance-Machines (SRMs) with an arbitrary number of phases is introduced in this paper. Direct portability of this control to machines with any number of phases is achieved by the developed Multiphase-Torque-Sharing concept. This concept is also necessary for SRMs where maximum torque can only be achieved by phase overlap of more than two phases.Furthermore, a new torque-sharing strategy for Predictive PWM-DITC is presented that minimizes losses in the machine without use of pre-computed current or torque profiles. This LowLoss-Commutation strategy also works without fixed switching angles.

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“…In previous work, two different approaches are commonly used to search for optimum firing angles: to conduct an empirical study of an existing prototype, or to combine optimization of one performance quantity with a subsequent fine tuning of firing angles for another performance quantity [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. As explained in section II, these tend to lead to a sequential parameter optimization, one parameter then another.…”

mentioning

confidence: 99%

“…In terms of performance optimization at a given torque-speed operating point, the efficiency is the only performance quantity considered in [12]. Abdulkadir and Yatim [13] used a drive dynamic model to determine the effect of firing angles variation on an SRM drive efficiency when the machine operates in voltage mode, current mode or torque controlled mode of operation. This work [13] was limited to finding optimum firing angles for maximum drive efficiency without consideration of any other performance quantity.…”

mentioning

confidence: 99%

A new technique for multi-dimensional performance optimization of switched reluctance motors for vehicle propulsion

Omekanda¹

Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344)

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This paper presents a new and simple search technique to determine the optimum control parameters, such as turn-on and turn-off angles, current set level, etc., of a switched reluctance drive. Thanks to this new technique, several drive performance quantities such as efficiencies, torque ripple, energy consumption, torque per ampere, etc., can be optimized simultaneously over the entire torque-or power-speed operation range of the drive. In prior art work, these performance quantities were sequentially optimized, one at a time. This despite reported evidence that improving one performance quantity, such as efficiency, can have a negative impact on others, such as torque ripple. The technique was successfully used off-line to determine the optimum firing angles for achieving highest drive efficiency with lower torque ripple in a 102-kW SRM drive intended for electric vehicle propulsion. The performance prediction and test results are found in good correlation.

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Maximum efficiency operation of switched reluctance motor by controlling switching angles

Cited by 10 publications

References 4 publications

Electromagnetic‐based maximum output power control in new two‐layer BLDC generator using optimal control of turn‐on and turn‐off angles in variable speed applications

Electromagnetic‐based maximum output power control in new two‐layer BLDC generator using optimal control of turn‐on and turn‐off angles in variable speed applications

Multiphase Torque-Sharing Concepts of Predictive PWM-DITC for SRM

A new technique for multi-dimensional performance optimization of switched reluctance motors for vehicle propulsion

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