Estimation of switched reluctance motor losses

Materu, P.; Krishnan, R.

doi:10.1109/28.137456

Cited by 117 publications

(38 citation statements)

References 6 publications

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“…Due to the non-sinusoidal current and flux density functions in SRM a non-trivial approach is required when determining core losses [13,14,15]. In the paper a procedure proposed in [13] has been employed, as a compromise between calculation simplicity and accuracy.…”

Section: Criterial Functions In Optimizationmentioning

confidence: 98%

An approach to find an optimum designed SRM for electric vehicle drive

Jażdżyński¹,

Majchrowicz

2008

2008 18th International Conference on Electrical Machines

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A procedure, which helps developing an optimized construction of a 6/4 type SRM, is described in the paper. A multicriterial optimization procedure and an analytical model arising from a reluctance network method is applied. An influence of non-linear properties of magnetic materials is taken into account. Calculations are performed in the Matlab environment. Obtained constructions, initial and optimized ones, are validated by means of FEM calculations. Simulation results related to a dynamic lumped-parameter model are presented. The proposed approach can be employed when designing the SRM to be a drive motor in an electrical vehicle.

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Section: Criterial Functions In Optimizationmentioning

confidence: 98%

An approach to find an optimum designed SRM for electric vehicle drive

Jażdżyński¹,

Majchrowicz

2008

2008 18th International Conference on Electrical Machines

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“…In one rotor revolution, the number of pulses each pole experiences in either direction equals the number of rotor poles. These pulses are delayed by a time shift of [8]. For the four phase, ( , ), 8/6 SRM investigated, the rotor pole sees four positive pulses during half the revolution and four negative pulses during the other half of the revolution, as seen in Fig.…”

Section: A Flux Modelmentioning

confidence: 99%

“…A detailed mathematical development of the flux waveforms has been presented by [8] and [10]. Considering a 4 phase 8/6 pole machine: suppose , , and represent the four phases of the machine with the associated flux linkages , , and as shown in Fig.…”

Section: A Flux Modelmentioning

confidence: 99%

Lamination Core Losses in Motors With Nonsinusoidal Excitation With Particular Reference to PWM and SRM Excitation Waveforms

Mthombeni

Pillay

2005

IEEE Trans. On Energy Conversion

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The effects of varying the modulation index and the switching frequency on steel lamination core losses when excited with pulse width modulated waveforms are first investigated. A switched reluctance motor flux model is also developed and flux waveforms for different parts of the machine are synthesized. Using these flux waveforms, the paper presents the loss trend inside a switched reluctance machine, showing the core loss variation of the machine. The rotor was found to incur higher losses than any other part inside the switched reluctance motor. The paper further identifies the flux density harmonics that contribute to higher core losses in the rotor. Using the Fourier series, an attempt to predict core losses under switched reluctance motor flux density waveforms is done and the predicted results are compared with measurements. An Epstein frame was used for direct core loss measurements on 0.0140 in. [0.36 mm] commercial electrical steel; the methods and test bench used, along with test results are detailed in the paper.

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“…At low and medium speeds this term is small and therefore current can be regulated using hysteresis-band current control [3,11]. The chopping action of this strategy increases the electric switching frequency resulting in higher power losses [4,12] in the semiconductors and the machine. To minimize them, the current rise di/dt is smoothened using a soft-chopping commutation mode [10] taking advantage of the converter ability to apply zero voltage to the machine phases.…”

Section: Switching Strategiesmentioning

confidence: 99%

Control system for the switched reluctance drive of a flywheel energy‐storage module

Vázquez

Lafoz

Ugena

et al. 2007

Int Trans Elec Energy Syst

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SUMMARYThis paper presents a novel control system for the operation of a flywheel energy-storage (FES) module used for power peak shaving in high-speed railway substations. A double power converter drives a switched reluctance machine (SRM) along with a flywheel operating in a wide speed range. An innovative controller architecture based on modular microcontrolled boards connected through a CAN network is introduced. Standard switching patterns are modified to reduce iron and semiconductor losses and to improve harmonic performance. Experimental results for a 140 kW/5 MJ prototype are presented confirming controller compliance with the system specifications and requirements.

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Estimation of switched reluctance motor losses

Cited by 117 publications

References 6 publications

An approach to find an optimum designed SRM for electric vehicle drive

An approach to find an optimum designed SRM for electric vehicle drive

Lamination Core Losses in Motors With Nonsinusoidal Excitation With Particular Reference to PWM and SRM Excitation Waveforms

Control system for the switched reluctance drive of a flywheel energy‐storage module

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