EPE Association: EPE 2001 - Topic 06b: Reluctance Machines and Drives

EPE 2001 - Topic 06b: Reluctance Machines and Drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2001 - Conference > EPE 2001 - Topic 06: ELECTRICAL MACHINES AND ADJUSTABLE SPEED DRIVES > EPE 2001 - Topic 06b: Reluctance Machines and Drives

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   A comparative analysis of DFRM´s performance parameters
By M. G. Jovanovic; R. E. Betz [View]
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Abstract: A brushless doubly-fed reluctance machine (BDFRM) belongs to the group of slip power recovery machines that can be supplied using a fractionally rated inverter. The machine basic design has evolved from a traditional cascaded induction machine by effectively integrating the two machines of different pole numbers into a single frame. The use of a “cold” reluctance rotor instead of a special cage one has offered the potential for greater efficiency and simpler control compared to the closely related and competing brushless doubly fed induction machine (BDFIM). This paper will carry out a comprehensive theoretical study of various control properties of the BDFRM and it will establish their inter-relationships. It will specifically focus on trade-offs between the machine optimal performance and the size of the feeding converter as it is the quantification of these compromises that will ultimately determine the future of BDFRM technology.

   A fuzzy expert system for predicting the performance of SR motor
By B. Mirzaeian; M. Moallem [View]
[Download]

Abstract: In this paper a fuzzy expert system for predicting the performance of a switched reluctance motor has been developed. The design vector consists of design parameters. Output performance variables are efficiency and torque ripple. Improved Magnetic Equivalent Circuit (IMEC) method has been used to generate the input-output data. The input-output data is used to produce the initial fuzzy rules for predicting the performance of Switched Reluctance Motor (SRM). The initial set of fuzzy rules with triangular membership functions has been devised using a table look-up scheme. This set of fuzzy rules has been optimized to a set of fuzzy rules with Gaussian membership functions using gradient descent training scheme. The performance prediction results for a 6/8, 4kw, SR motor shows good agreement with the results obtained from IMEC method or Finite Element (FE) analysis.

   A Novel Method to Improve Power Factor in SRM Drive Systems ...
By K.W.E. Cheng; X.D. Xue; S.L. Ho [View]
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Abstract: Influences of power flow on power factor in SRM drive systems are studied through theoretical analysis, simulation and experiment, in this paper. Moreover, the strategy to adjust power flow is presented using the proposed theoretical analysis. The simulation and experimental results prove that the proposed method is capable to improve power factor in SRM drive systems. It is an effective method and does not increase any cost.

   An Algorithm to Compute Power Factor in Switched Reluctance MDS
By X.D. Xue; K.W.E. Cheng; S.L. Ho [View]
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Abstract: This paper presents an algorithm to compute power factor in switched reluctance motor (SRM) drive systems. Both SRM and its drive are included in the proposed algorithm. Moreover, the modeling and the simulation algorithm are given. The simulation and experiment results confirm capability of the proposed algorithm.

   Coil Arrangement in Switched Reluctance Machines
By R. B Inderka; R.W. De Doncker; R.S. Öttl [View]
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Abstract: The modular structure of the coils on the salient poles within switched reluctance machines gives a high flexibility in the sequence of the coil arrangement. In this paper, the influence of the poleexcitation direction, i.e. the magnetic polarity of adjacent or opposite stator poles, will be discussed for static respectively standstill and steady-state performance. The possible arrangements and the resulting effects on the performance of a standard short-pitched 4-phase machine are investigated. Experimental, simulation and finite-element results are presented.

   Labview implementation of a SRM controller
By V. Trifa; O.Rabulea; A. Peculea [View]
[Download]

Abstract: The paper contains theoretical and experimental results referring to an 8/6 SRM LabVIEW controller. The aim is to present the commutation principle and optimal behaviour of the SRM with a given configuration of the angular transducer. The controller processes the transducer signals in order to obtain various control modes in four-quadrant operation. Experimental and simulated curves related to electrical and mechanical magnitudes are presented and compared. The LabVIEW graphical programming features offers the opportunity of a complex commutation process study in order to improve the SRM control.

   Measurement of the Parameters of the Synchronous Reluctance Machine
By A. Kilthau; J.M. Pacas [View]
[Download]

Abstract: This paper deals with the measurement of the parameters of the synchronous reluctance machine. Three different measuring methods are presented, consisting of a transient current decay and a steady-state analysis. The results are checked for plausibility and are compared among each other. The obtained parameters are used for the computation of the regions of optimum torque especially in the field weakening range. This paper gives fundamental information for the development of parameter-based control schemes with or without angle sensor.

   On The Performance Improvement of A Hybrid Switched Reluctance Motor
By J. Oyama; T. Higuchi; T. Abe; T. Tanaka; E. Yamada [View]
[Download]

Abstract: In the previous paper, we proposed a cylindrical stator hybrid type switched reluctance motor (SRM) which had a pair of permanent magnets attached on the rotor between the poles. The improvement in the characteristic was confirmed by adopting the permanent magnet torque combined with the reluctance torque. This paper describes the experimental results under an advanced firing angle and an on-state angle control. Furthermore, a new hybrid type SRM with salient pole stator is proposed and the design was optimized by FEM. The remarkable improvement of machine performance in the hybrid type SRM over standard VR type SRM is confirmed with experimental results.

EPE 2001 - Topic 06b: Reluctance Machines and Drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2001 - Conference > EPE 2001 - Topic 06: ELECTRICAL MACHINES AND ADJUSTABLE SPEED DRIVES > EPE 2001 - Topic 06b: Reluctance Machines and Drives
	[return to parent folder]

	A comparative analysis of DFRM´s performance parameters By M. G. Jovanovic; R. E. Betz	[View] [Download]
Abstract: A brushless doubly-fed reluctance machine (BDFRM) belongs to the group of slip power recovery machines that can be supplied using a fractionally rated inverter. The machine basic design has evolved from a traditional cascaded induction machine by effectively integrating the two machines of different pole numbers into a single frame. The use of a “cold” reluctance rotor instead of a special cage one has offered the potential for greater efficiency and simpler control compared to the closely related and competing brushless doubly fed induction machine (BDFIM). This paper will carry out a comprehensive theoretical study of various control properties of the BDFRM and it will establish their inter-relationships. It will specifically focus on trade-offs between the machine optimal performance and the size of the feeding converter as it is the quantification of these compromises that will ultimately determine the future of BDFRM technology.

	A fuzzy expert system for predicting the performance of SR motor By B. Mirzaeian; M. Moallem	[View] [Download]
Abstract: In this paper a fuzzy expert system for predicting the performance of a switched reluctance motor has been developed. The design vector consists of design parameters. Output performance variables are efficiency and torque ripple. Improved Magnetic Equivalent Circuit (IMEC) method has been used to generate the input-output data. The input-output data is used to produce the initial fuzzy rules for predicting the performance of Switched Reluctance Motor (SRM). The initial set of fuzzy rules with triangular membership functions has been devised using a table look-up scheme. This set of fuzzy rules has been optimized to a set of fuzzy rules with Gaussian membership functions using gradient descent training scheme. The performance prediction results for a 6/8, 4kw, SR motor shows good agreement with the results obtained from IMEC method or Finite Element (FE) analysis.

	A Novel Method to Improve Power Factor in SRM Drive Systems ... By K.W.E. Cheng; X.D. Xue; S.L. Ho	[View] [Download]
Abstract: Influences of power flow on power factor in SRM drive systems are studied through theoretical analysis, simulation and experiment, in this paper. Moreover, the strategy to adjust power flow is presented using the proposed theoretical analysis. The simulation and experimental results prove that the proposed method is capable to improve power factor in SRM drive systems. It is an effective method and does not increase any cost.

	An Algorithm to Compute Power Factor in Switched Reluctance MDS By X.D. Xue; K.W.E. Cheng; S.L. Ho	[View] [Download]
Abstract: This paper presents an algorithm to compute power factor in switched reluctance motor (SRM) drive systems. Both SRM and its drive are included in the proposed algorithm. Moreover, the modeling and the simulation algorithm are given. The simulation and experiment results confirm capability of the proposed algorithm.

	Coil Arrangement in Switched Reluctance Machines By R. B Inderka; R.W. De Doncker; R.S. Öttl	[View] [Download]
Abstract: The modular structure of the coils on the salient poles within switched reluctance machines gives a high flexibility in the sequence of the coil arrangement. In this paper, the influence of the poleexcitation direction, i.e. the magnetic polarity of adjacent or opposite stator poles, will be discussed for static respectively standstill and steady-state performance. The possible arrangements and the resulting effects on the performance of a standard short-pitched 4-phase machine are investigated. Experimental, simulation and finite-element results are presented.

	Labview implementation of a SRM controller By V. Trifa; O.Rabulea; A. Peculea	[View] [Download]
Abstract: The paper contains theoretical and experimental results referring to an 8/6 SRM LabVIEW controller. The aim is to present the commutation principle and optimal behaviour of the SRM with a given configuration of the angular transducer. The controller processes the transducer signals in order to obtain various control modes in four-quadrant operation. Experimental and simulated curves related to electrical and mechanical magnitudes are presented and compared. The LabVIEW graphical programming features offers the opportunity of a complex commutation process study in order to improve the SRM control.

	Measurement of the Parameters of the Synchronous Reluctance Machine By A. Kilthau; J.M. Pacas	[View] [Download]
Abstract: This paper deals with the measurement of the parameters of the synchronous reluctance machine. Three different measuring methods are presented, consisting of a transient current decay and a steady-state analysis. The results are checked for plausibility and are compared among each other. The obtained parameters are used for the computation of the regions of optimum torque especially in the field weakening range. This paper gives fundamental information for the development of parameter-based control schemes with or without angle sensor.

	On The Performance Improvement of A Hybrid Switched Reluctance Motor By J. Oyama; T. Higuchi; T. Abe; T. Tanaka; E. Yamada	[View] [Download]
Abstract: In the previous paper, we proposed a cylindrical stator hybrid type switched reluctance motor (SRM) which had a pair of permanent magnets attached on the rotor between the poles. The improvement in the characteristic was confirmed by adopting the permanent magnet torque combined with the reluctance torque. This paper describes the experimental results under an advanced firing angle and an on-state angle control. Furthermore, a new hybrid type SRM with salient pole stator is proposed and the design was optimized by FEM. The remarkable improvement of machine performance in the hybrid type SRM over standard VR type SRM is confirmed with experimental results.