Comparison of Test Result and Design Stage Prediction of Switched Reluctance Motor Competitive With 60-kW Rare-Earth PM Motor

Kiyota, Kyohei; Kakishima, Takeo; Chibá, Akira

doi:10.1109/tie.2014.2304705

Cited by 125 publications

(52 citation statements)

References 18 publications

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“…The torque and power densities of the described SRMs are in the range of 7-30 Nm/L and 0.5-6 kW/L. In this project, the torque and power densities have been improved as 35 Nm/L and 18.4 kW/L [13]- [15]. In addition, and the efficiency has been enhanced to be competitive value to those of IPMSMs [13]- [16].…”

Section: Introductionmentioning

confidence: 93%

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Cylindrical rotor design for acoustic noise and windage loss reduction in switched reluctance motor for HEV applications

Kiyota

Kakishima

Chibá

2014

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

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A Switched Reluctance Motor (SRM) is one of the candidates of rare-earth-free-motors for hybrid electric vehicle (HEV). An SRM has been developed with exact IPMSM dimensions with competitive maximum torque, operating area, and maximum efficiency. However, considered windage loss of around 1.3 kW is resulted by the salient poles of the SRM at the maximum rotational speed. In addition, considerable acoustic noise is caused by the salient poles. In this paper, a simple design of a cylindrical outer shape rotor is proposed and a comparison to the conventional rotor is carried out. It is found that the efficiency is improved thanks to the windage loss reduction. It is also found that the acoustic noise is significantly reduced.

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Section: Introductionmentioning

confidence: 93%

“…Fig. 2 shows the pictures of a conventional SR machine reported in [15]. The outer diameter of the stator iron core and the rotor is 264 mm and 182 mm, respectively.…”

Section: Introductionmentioning

confidence: 99%

Cylindrical rotor design for acoustic noise and windage loss reduction in switched reluctance motor for HEV applications

Kiyota

Kakishima

Chibá

2014

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

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“…The standard approach for hot-spot temperature calculation is through using characteristic point temperatures. Assimilable models are published in [4], [5] and [6].…”

Section: Thermal Transformer Modelmentioning

confidence: 99%

“…A new attempt was made in [4] where a thermal model with parameters which can be in a great extend determined based on easy measurements is given.…”

Section: Thermal Transformer Modelmentioning

confidence: 99%

Monitoring and Controlling of Power Loss in a Transformer

2017

IJAERD

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ABSTRACT:-Large power transformers belong to the most valuable and important assets in electrical power systems. The ageing of the used oil/paper-insulation primarily depends on the hot-spot temperature of the solid insulation system. Hence it is the dominant factor INTRODUCTIONSince large power transformers belong to the most valuable assets in electrical power networks it is suitable to pay higher attention to this operating resources. An outage impacts the stability of the network and the associated financial penalties for the power utilities can be considerably high. Nevertheless the possible damage caused to the environment in case of a burst can not be denied. The statistical data show that the windings represent a not neglect able source of transformer faults therefore thermal stress is the most provocative factor until cellulose insulation is used [1].Thermal impact leads not only to a long term oil/paper-insulation degradation it is also a limiting factor for the transformer operation [2]. Therefore the knowledge of the temperature, especially the hot-spot-temperature, is of high interest. The on-line information about the current operation condition and the calculation of current thermal stress help to avoid unexpected outages. Furthermore it allows a more efficient and profitable transformer exploitation which becomes under the competitive conditions of the liberalized energy market more and more important [3].Thermal monitoring systems have been established due to easy temperature measurement techniques and for most applications sufficient knowledge in thermal modelling, e.g. hot-spot temperature calculation accuracy. The benefit gathered by thermal monitoring is indisputable, ranging from the instantaneous operation state up to a long-term operation strategy anyhow with high flexibility for rapid intervention if "non-normal" operation conditions will occur, e.g. for overload and emergency operation purpose. The sophisticated technology now a days allows to combine features exceeding the conventional monitoring pilosophy, e.g. monitoring and control facilities which enables feedback between the monitoring system and other subassembly.

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“…The SRM has a simple and rugged rotor structure, as well as advantages of high efficiency, low cost, and high reliability [1]- [4]. It is particularly suited for high-speed and safety-critical applications [5], [6].…”

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confidence: 99%

Wavelet Packet Decomposition-Based Fault Diagnosis Scheme for SRM Drives With a Single Current Sensor

Gan

Yang

et al. 2016

IEEE Trans. Energy Convers.

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Abstract-Power converters are a key, but vulnerable component in switched reluctance motor (SRM) drives. In this paper, a new fault diagnosis scheme for SRM converters is proposed based on the wavelet packet decomposition (WPD) with a dc-link current sensor. Open-and short-circuit faults of the power switches in an asymmetrical half-bridge converter are analyzed in details. In order to obtain the fault signature from the phase currents, two pulse-width modulation signals with phase shift are injected into the lower-switches of the converter to extract the excitation current, and the WPD algorithm is then applied to the detected currents for fault diagnosis. Moreover, a discrete degree of the wavelet packet node energy is chosen as the fault coefficient. The converter faults can be diagnosed and located directly by determining the changes in the discrete degree from the detected currents. The proposed scheme requires only one current sensor in the dc link, while conventional methods need one sensor for each phase or additional detection circuits. The experimental results on a 750-W three-phase SRM are presented to confirm the effectiveness of the proposed fault diagnosis scheme.Index Terms-Current sensor, discrete degree, fault diagnosis, node energy, power converter, pulse-width modulation (PWM), switched reluctance motor (SRM), wavelet packet decomposition (WPD).

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Comparison of Test Result and Design Stage Prediction of Switched Reluctance Motor Competitive With 60-kW Rare-Earth PM Motor

Cited by 125 publications

References 18 publications

Cylindrical rotor design for acoustic noise and windage loss reduction in switched reluctance motor for HEV applications

Cylindrical rotor design for acoustic noise and windage loss reduction in switched reluctance motor for HEV applications

Monitoring and Controlling of Power Loss in a Transformer

Wavelet Packet Decomposition-Based Fault Diagnosis Scheme for SRM Drives With a Single Current Sensor

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