EPE Association: EPE 2009 - Subtopic 10-1 - LS: 'Electrical Machines

EPE 2009 - Subtopic 10-1 - LS: 'Electrical Machines - New Design'
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2009 - Conference > EPE 2009 - Topic 10: 'Electrical Machines' > EPE 2009 - Subtopic 10-1 - LS: 'Electrical Machines - New Design'

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   A 250kW transverse-laminated Synchronous Reluctance Motor
By Gianmario PELLEGRINO, Paolo GUGLIELMI, Eric ARMANDO, Alfredo VAGATI [View]
[Download]

Abstract: Throughout the last 15 years, Synchronous Reluctance (SyR) motor drives have been presented as a competitive alternative to Induction Motor (IM) drives in many variable speed applications, at least in the small power range. Very few examples of SyR motors above the 100Nm torque size are present in the literature. The main advantage of the SyR motor lays in the absence of rotor Joule losses that permits to obtain a continuous torque that is higher than the one of an IM of the same size. The paper presents a 250kW, 1000rpm Synchronous Reluctance motor for industrial applications and its performance comparison with an Induction Motor with identical stator. The rotor of the SyR motor has been purposely designed to fit the stator and housing of the IM competitor. The experimental comparison of the two motors is presented, on a regenerative test bench where one the two motors under test can load the competitor and vice-versa. The results of the experimental tests confirm the assumption that the SyR motor gives more torque and then more power in continuous operation at rated windings temperature. However, the IM maintains a certain advantage in terms of fluxweakening capability that means a larger constant-power speed range.

   A New Loss Minimization Approach with Flux and Torque Ripples Reduction of Direct Torque Controlled Permanent Magnet Synchronous Motors
By jafar SIAHBALAEE, Sadegh VAEZ-ZADEH, FARZAD TAHAMI [View]
[Download]

Abstract: The main purpose of this paper is to minimize the loss while reducing the flux and torque ripples in permanent magnet synchronous motors (PMSMs) under direct torque control (DTC). Offline method is used to minimize the loss and obtain the optimal flux. To reduce the amount of computation, the optimal flux table is produced according to the conditions in which the machine works. To reduce the flux and torque ripples and to control the switching frequency, SVM-DTC method is applied. Simulation results depict a noticeable increase in efficiency of the motor and a reduction in flux and torque ripples.

   A Novel High Power Permanent Magnet Reluctance Generator using Ferrite Magnets
By Kenji NAKAMURA [View]
[Download]

Abstract: A permanent magnet reluctance generator (PMRG) has a doubly salient pole structure. The permanent magnets are embedded in the stator yoke, and concentrated windings are arranged individually around each stator pole. On the other hand, the rotor has neither permanent magnets nor windings. Therefore, the PMRG has a simple and robust structure, and permits a multipolar structure. Its application to small-scale wind-turbine and hydroelectric power generation is expected. This paper presents a novel PMRG using ferrite magnets, which has almost the same output power as that using rare-earth magnets. Furthermore, it is proposed that a method for reducing toque ripple of the PMRG by cutting off the rotor pole-tips and canceling odd harmonic torque.

EPE 2009 - Subtopic 10-1 - LS: 'Electrical Machines - New Design'
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2009 - Conference > EPE 2009 - Topic 10: 'Electrical Machines' > EPE 2009 - Subtopic 10-1 - LS: 'Electrical Machines - New Design'
	[return to parent folder]

	A 250kW transverse-laminated Synchronous Reluctance Motor By Gianmario PELLEGRINO, Paolo GUGLIELMI, Eric ARMANDO, Alfredo VAGATI	[View] [Download]
Abstract: Throughout the last 15 years, Synchronous Reluctance (SyR) motor drives have been presented as a competitive alternative to Induction Motor (IM) drives in many variable speed applications, at least in the small power range. Very few examples of SyR motors above the 100Nm torque size are present in the literature. The main advantage of the SyR motor lays in the absence of rotor Joule losses that permits to obtain a continuous torque that is higher than the one of an IM of the same size. The paper presents a 250kW, 1000rpm Synchronous Reluctance motor for industrial applications and its performance comparison with an Induction Motor with identical stator. The rotor of the SyR motor has been purposely designed to fit the stator and housing of the IM competitor. The experimental comparison of the two motors is presented, on a regenerative test bench where one the two motors under test can load the competitor and vice-versa. The results of the experimental tests confirm the assumption that the SyR motor gives more torque and then more power in continuous operation at rated windings temperature. However, the IM maintains a certain advantage in terms of fluxweakening capability that means a larger constant-power speed range.

	A New Loss Minimization Approach with Flux and Torque Ripples Reduction of Direct Torque Controlled Permanent Magnet Synchronous Motors By jafar SIAHBALAEE, Sadegh VAEZ-ZADEH, FARZAD TAHAMI	[View] [Download]
Abstract: The main purpose of this paper is to minimize the loss while reducing the flux and torque ripples in permanent magnet synchronous motors (PMSMs) under direct torque control (DTC). Offline method is used to minimize the loss and obtain the optimal flux. To reduce the amount of computation, the optimal flux table is produced according to the conditions in which the machine works. To reduce the flux and torque ripples and to control the switching frequency, SVM-DTC method is applied. Simulation results depict a noticeable increase in efficiency of the motor and a reduction in flux and torque ripples.

	A Novel High Power Permanent Magnet Reluctance Generator using Ferrite Magnets By Kenji NAKAMURA	[View] [Download]
Abstract: A permanent magnet reluctance generator (PMRG) has a doubly salient pole structure. The permanent magnets are embedded in the stator yoke, and concentrated windings are arranged individually around each stator pole. On the other hand, the rotor has neither permanent magnets nor windings. Therefore, the PMRG has a simple and robust structure, and permits a multipolar structure. Its application to small-scale wind-turbine and hydroelectric power generation is expected. This paper presents a novel PMRG using ferrite magnets, which has almost the same output power as that using rare-earth magnets. Furthermore, it is proposed that a method for reducing toque ripple of the PMRG by cutting off the rotor pole-tips and canceling odd harmonic torque.