EPE Association: EPE 2001 - Topic 06d: A.C. and D.C. Machines and Drives

EPE 2001 - Topic 06d: A.C. and D.C. 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 06d: A.C. and D.C. Machines and Drives

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   A New Generation DC Motor Drive based on Buck Type PWM Rectifier
By F. Bilgin; K.N. Kose; G. Zenginobuz; M. Ermis; E. Nalcacý; H. Kose [View]
[Download]

Abstract: This paper describes a new generation dc motor drive based on unity power factor buck type PWM rectifier, which presents low harmonic distortion in supply currents, nearly unity pf over a wide operating shaft speed range, and nearly pure dc armature current. The design criteria and operating -features and -principles of the buck type PWM rectifier employed in new generation dc motor drive are discussed in the paper. The performance of the resulting system has been tested on 25kW, 100A dc motor drive.

   A Novel Presentation of the DTSFC for Induction Motor Drives
By A.A. Naassani; E. Monmasson; J.P. Louis [View]
[Download]

Abstract: In this paper, a novel approach of the DTSFC for induction machine is proposed. Differently from basic version of DTSFC, the stator flux vector reference is predicted using two methods. Based on one of these, the inverter voltage vectors can be generated by several control strategies, bang-bang, SVM, and switching table. The validity of the proposed methods is verified by experimental tests.

   Comparative analysis of Flux observers with an High Performance Drives
By E. A. Carter; A. Bellini; D. Murdock; R. D. Lorenz [View]
[Download]

Abstract: This paper presents a comparative evaluation of flux observers for state-of-the-art, direct field oriented induction machine drives. The implementation is part of the development of a high performance drive testbed. Included in the full paper is the development of the overall testbed layout, test and measurement systems embedded in the testbed, as well as the control topology.

   Fuzzy logic based gain determination of induction motor flux observers
By F. Berthereau; B. Robyns; J.P. Hautier [View]
[Download]

Abstract: It is proposed in this paper a method to compute gains of induction motor flux observers, based on fuzzy logic associated to a theoretical sensitivity analysis. The theoretical analysis, taking the magnetic saturation into account, allows to study the observer sensitivity to all parameter uncertainties. The fuzzy logic associated to the theoretical analysis allows to determine observer gains which optimize together dynamics and sensitivity criteria. Although the theoretical sensitivity analysis may be developed for observers in any reference frame, the proposed method is applied in this paper respectively to a reduced and a full order flux observers based on the Park model in the stator reference frame only. The proposed method is validated by experiments on a 750W induction motor.

   High Efficiency Drive System
By Y. Kawabata; M. Nasu; T. Kawakami; E. Ejiogu; T. Kawabata [View]
[Download]

Abstract: This paper proposes a new high efficiency drive system using an open-winding a.c. motor and two space vector modulated inverters. This configuration consists of a 3-level inverter with switching at once every cycle and a 2-level inverter of about 1kHz switching frequency, connected respectively to the opposite terminals of the open-winding a.c. motor. With the proposed configuration, good current waveforms, low acoustic noise and high efficiency can be obtained. Moreover, this space vector modulation system is suitable for the vector control.

   Investigation Into The Relationship Between Waveforms And Vibrations
By P. Dorland; J.A. Ferreira; F Blaabjerg [View]
[Download]

Abstract: The investigation aims to establish the relationship between the stator voltage and current and the mechanical vibrations that cause acoustic noise. A transfer factor based on standard frequency analysis is proposed which gauges the linearity of the transfer functions. This factor is intended as a design aid for noise reduction schemes. Experimental results for two induction motor drive systems are presented.

   Novel Fuzzy Logic Direct Torque Control
By A. Arias; J. L. Romeral; E. Aldabas; M. G. Jayne [View]
[Download]

Abstract: A brief review of the classical Direct Torque Control (c_DTC) in induction motors with its fundamental principles and schemas is realised. Once the c_DTC is fully and deeply described, its main drawbacks are introduced. It is one of the goals of the present paper to overcome one of the worst disadvantages of the DTC, which is the existence of a considerable ripple in its torque response. The reduction in the torque ripple is achieved by means of a two state modulator. Due to the fact that the torque ripple reduction involve non-linear functions, the two state modulator is controlled by means of a fuzzy logic controller. Then, a novel Fuzzy Logic DTC controller, which is based on the classical c_DTC but includes a Fuzzy Logic Controlled modulator, is fully described. Finally, an optimised way of calculating the stator reference flux value is presented, which can be applied in any kind of induction motor drive. This optimised stator flux reference value not only improves the torque ripple, but also could reduce the power consumption taken from the mains supply. Results are shown to corroborate all the presented work.

   Steady state analysis of two connected induction motors, application..
By V. de Oliveira; E. Monmasson; J.P. Louis. [View]
[Download]

Abstract: This paper focuses on the analysis of the differential properties of a two connected induction motor set. Each of these three phase squirrel cage induction machines has a double winding stator. This allows a lot of possibilities of coupling. We present in this work the general steady state analysis of a double winding stator motor and one of the most promising coupling between two double winding stator motors. Moreover, we realized a scale model based on two classical induction machines.

EPE 2001 - Topic 06d: A.C. and D.C. 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 06d: A.C. and D.C. Machines and Drives
	[return to parent folder]

	A New Generation DC Motor Drive based on Buck Type PWM Rectifier By F. Bilgin; K.N. Kose; G. Zenginobuz; M. Ermis; E. Nalcacý; H. Kose	[View] [Download]
Abstract: This paper describes a new generation dc motor drive based on unity power factor buck type PWM rectifier, which presents low harmonic distortion in supply currents, nearly unity pf over a wide operating shaft speed range, and nearly pure dc armature current. The design criteria and operating -features and -principles of the buck type PWM rectifier employed in new generation dc motor drive are discussed in the paper. The performance of the resulting system has been tested on 25kW, 100A dc motor drive.

	A Novel Presentation of the DTSFC for Induction Motor Drives By A.A. Naassani; E. Monmasson; J.P. Louis	[View] [Download]
Abstract: In this paper, a novel approach of the DTSFC for induction machine is proposed. Differently from basic version of DTSFC, the stator flux vector reference is predicted using two methods. Based on one of these, the inverter voltage vectors can be generated by several control strategies, bang-bang, SVM, and switching table. The validity of the proposed methods is verified by experimental tests.

	Comparative analysis of Flux observers with an High Performance Drives By E. A. Carter; A. Bellini; D. Murdock; R. D. Lorenz	[View] [Download]
Abstract: This paper presents a comparative evaluation of flux observers for state-of-the-art, direct field oriented induction machine drives. The implementation is part of the development of a high performance drive testbed. Included in the full paper is the development of the overall testbed layout, test and measurement systems embedded in the testbed, as well as the control topology.

	Fuzzy logic based gain determination of induction motor flux observers By F. Berthereau; B. Robyns; J.P. Hautier	[View] [Download]
Abstract: It is proposed in this paper a method to compute gains of induction motor flux observers, based on fuzzy logic associated to a theoretical sensitivity analysis. The theoretical analysis, taking the magnetic saturation into account, allows to study the observer sensitivity to all parameter uncertainties. The fuzzy logic associated to the theoretical analysis allows to determine observer gains which optimize together dynamics and sensitivity criteria. Although the theoretical sensitivity analysis may be developed for observers in any reference frame, the proposed method is applied in this paper respectively to a reduced and a full order flux observers based on the Park model in the stator reference frame only. The proposed method is validated by experiments on a 750W induction motor.

	High Efficiency Drive System By Y. Kawabata; M. Nasu; T. Kawakami; E. Ejiogu; T. Kawabata	[View] [Download]
Abstract: This paper proposes a new high efficiency drive system using an open-winding a.c. motor and two space vector modulated inverters. This configuration consists of a 3-level inverter with switching at once every cycle and a 2-level inverter of about 1kHz switching frequency, connected respectively to the opposite terminals of the open-winding a.c. motor. With the proposed configuration, good current waveforms, low acoustic noise and high efficiency can be obtained. Moreover, this space vector modulation system is suitable for the vector control.

	Investigation Into The Relationship Between Waveforms And Vibrations By P. Dorland; J.A. Ferreira; F Blaabjerg	[View] [Download]
Abstract: The investigation aims to establish the relationship between the stator voltage and current and the mechanical vibrations that cause acoustic noise. A transfer factor based on standard frequency analysis is proposed which gauges the linearity of the transfer functions. This factor is intended as a design aid for noise reduction schemes. Experimental results for two induction motor drive systems are presented.

	Novel Fuzzy Logic Direct Torque Control By A. Arias; J. L. Romeral; E. Aldabas; M. G. Jayne	[View] [Download]
Abstract: A brief review of the classical Direct Torque Control (c_DTC) in induction motors with its fundamental principles and schemas is realised. Once the c_DTC is fully and deeply described, its main drawbacks are introduced. It is one of the goals of the present paper to overcome one of the worst disadvantages of the DTC, which is the existence of a considerable ripple in its torque response. The reduction in the torque ripple is achieved by means of a two state modulator. Due to the fact that the torque ripple reduction involve non-linear functions, the two state modulator is controlled by means of a fuzzy logic controller. Then, a novel Fuzzy Logic DTC controller, which is based on the classical c_DTC but includes a Fuzzy Logic Controlled modulator, is fully described. Finally, an optimised way of calculating the stator reference flux value is presented, which can be applied in any kind of induction motor drive. This optimised stator flux reference value not only improves the torque ripple, but also could reduce the power consumption taken from the mains supply. Results are shown to corroborate all the presented work.

	Steady state analysis of two connected induction motors, application.. By V. de Oliveira; E. Monmasson; J.P. Louis.	[View] [Download]
Abstract: This paper focuses on the analysis of the differential properties of a two connected induction motor set. Each of these three phase squirrel cage induction machines has a double winding stator. This allows a lot of possibilities of coupling. We present in this work the general steady state analysis of a double winding stator motor and one of the most promising coupling between two double winding stator motors. Moreover, we realized a scale model based on two classical induction machines.