EPE Association: EPE-PEMC 2002: Special Session: Recent Advances and Trends in Electric Motors for Drives

EPE-PEMC 2002: Special Session: Recent Advances and Trends in Electric Motors for Drives
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2002 - Conference > EPE-PEMC 2002: Special Session: Recent Advances and Trends in Electric Motors for Drives

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   Application of Soft Magnetic Composite Materials to Electric Motors
By P. Jansson [View]
[Download]

Abstract: The advent of soft magnetic composites (SMC) opens the arena for innovative electrical machine designs with three dimensional flux paths for mass production. The key to commercial success lies in interactive multi-disciplinary co-operation with parallel development activities. The SMC materials are based on iron powder particles with surface insulation for low eddy current loss. Insulated particles, such as those used for dust cores have existed for many years, however these low density products with permeability values of 150 to 200 and low saturation induction are better suited to high frequency applications. The thin inorganic insulation of the SMC materials allows heat treatment at 500°C, which results in a partial stress relief and permeabilities of 500 and above. High flux density requires high component density, which is achieved with high compressibility powders. The compressibility of the powder is dependent on the surface coating, which must be minimized. The SMC materials are suitable for large scale mass production of complex components with good tolerances, smooth surfaces, no secondary operations and no material waste. Electrical machines with two dimensional flux paths benefit from the use of laminated electrical steel as the anisotropic properties are put to advantage. Machines such as claw pole motors, transverse flux machines etc. have not achieved widespread industrial use, as these require a material with isotropic properties suitable for mass production. However SMC material data alone is insufficient as the sole aspect for design focus. A new design should incorporate all aspects of the new motor including windings, permanent magnets, reduction in the number of parts and simplification of assembly. It is first when all the advantages of concurrent engineering are applied that full commercial success can be achieved.

   Electric Motors for Automotive Applications
By M. Islam; S. Mir; T. Sebastian [View]
[Download]

Abstract: The use of electric motors in automobiles has been steadily increasing since the mid 1900’s. The application of speed or torque controlled motors in automobiles is fueled by the need for improved fuel economy, and the demand for vehicles with more comfort and convenience. Though the advances in power and control electronics and the developments in high-energy magnets have enhanced the cost effectiveness of such systems, much more advances will be required before large scale use of such machines in automobiles is achieved. This paper discusses the trends and challenges in introducing these motors into automotive applications. The paper also discusses the potential technologies and the key developments that are needed for these technologies to be acceptable for automotive applications.

   Electric Motors for Light Traction
By J. F. Gieras; N. Bianchi [View]
[Download]

Abstract: Modern electric motors for light rail transit (street cars, trolley lines, subway trains), guided transit systems, and for road electric vehicles have been discussed. The paper aims at various types of rotary brushless motors, direct electromechanical drives and practical solutions to light traction systems. Light traction with linear motors has not been considered. Although induction motors are the most popular motors, permanent magnet (PM) brushless motors can economically be used in smaller electric vehicles. Modern PM motor technologies offer diversity of interior magnet motors, transverse flux motors, disc type motors, and PM assisted synchronous reluctance motors.

   Electric Motors for the Growth in the Drive Applications
By S. Bolognani; N. Bianchi; M. Zigliotto [View]
[Download]

Abstract: Among topics of study related to the drives, an increasing interest to the electric motor can be recognised in the last years, justified by different reasons. The first reason is that industrial and civil world is moving from general-purpose motors to application-oriented motors. Dedicated motors have to meet peculiar specifications and stimulate new specific standards. According to this trend, motors of different type and with different topology are designed to comply with the different requirements. New materials are also available for the motor construction and new manufacturing technologies are experienced. New fields of application are therefore gained and, as a positive feedback, new motors are invented. World globalisation may allow a mass production of electric motors even in the case of application-oriented type. This paper is mainly devoted to the state-of-the-art and the trends in electrical motors for drives. A review of the their market is at first discussed. Then an exam of the most innovative aspects involving the motors is proposed. At last, some significant new application fields are illustrated.

   Motors for Home Applications Development of Environment-Friendly Electric Motors
By Y. Takeda; S. Morimoto; H. Murakami [View]
[Download]

Abstract: This paper describes the recent technology and the trends of motors for home applications. The features such as high-efficiency, low-noise, small size and low-cost are demanded for the motors of home applications. The permanent magnet synchronous motor (PMSM) has come to be used as a motor to satisfy such demands in Japan. This paper mainly describes the technology of PMSM design for the compressor drive application such as an air conditioner. The effects of rotor configurations including the arrangement of permanent magnets on the efficiency performance are examined and the stator configurations such as the distributed winding and the concentrated winding are also discussed. The effects of the ratio of magnet torque and reluctance torque on both efficiency and cost are also discussed. Several motors used for the actual electric home appliances such as air conditioner, refrigerator and washer are introduced.

EPE-PEMC 2002: Special Session: Recent Advances and Trends in Electric Motors for Drives
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2002 - Conference > EPE-PEMC 2002: Special Session: Recent Advances and Trends in Electric Motors for Drives
	[return to parent folder]

	Application of Soft Magnetic Composite Materials to Electric Motors By P. Jansson	[View] [Download]
Abstract: The advent of soft magnetic composites (SMC) opens the arena for innovative electrical machine designs with three dimensional flux paths for mass production. The key to commercial success lies in interactive multi-disciplinary co-operation with parallel development activities. The SMC materials are based on iron powder particles with surface insulation for low eddy current loss. Insulated particles, such as those used for dust cores have existed for many years, however these low density products with permeability values of 150 to 200 and low saturation induction are better suited to high frequency applications. The thin inorganic insulation of the SMC materials allows heat treatment at 500°C, which results in a partial stress relief and permeabilities of 500 and above. High flux density requires high component density, which is achieved with high compressibility powders. The compressibility of the powder is dependent on the surface coating, which must be minimized. The SMC materials are suitable for large scale mass production of complex components with good tolerances, smooth surfaces, no secondary operations and no material waste. Electrical machines with two dimensional flux paths benefit from the use of laminated electrical steel as the anisotropic properties are put to advantage. Machines such as claw pole motors, transverse flux machines etc. have not achieved widespread industrial use, as these require a material with isotropic properties suitable for mass production. However SMC material data alone is insufficient as the sole aspect for design focus. A new design should incorporate all aspects of the new motor including windings, permanent magnets, reduction in the number of parts and simplification of assembly. It is first when all the advantages of concurrent engineering are applied that full commercial success can be achieved.

	Electric Motors for Automotive Applications By M. Islam; S. Mir; T. Sebastian	[View] [Download]
Abstract: The use of electric motors in automobiles has been steadily increasing since the mid 1900’s. The application of speed or torque controlled motors in automobiles is fueled by the need for improved fuel economy, and the demand for vehicles with more comfort and convenience. Though the advances in power and control electronics and the developments in high-energy magnets have enhanced the cost effectiveness of such systems, much more advances will be required before large scale use of such machines in automobiles is achieved. This paper discusses the trends and challenges in introducing these motors into automotive applications. The paper also discusses the potential technologies and the key developments that are needed for these technologies to be acceptable for automotive applications.

	Electric Motors for Light Traction By J. F. Gieras; N. Bianchi	[View] [Download]
Abstract: Modern electric motors for light rail transit (street cars, trolley lines, subway trains), guided transit systems, and for road electric vehicles have been discussed. The paper aims at various types of rotary brushless motors, direct electromechanical drives and practical solutions to light traction systems. Light traction with linear motors has not been considered. Although induction motors are the most popular motors, permanent magnet (PM) brushless motors can economically be used in smaller electric vehicles. Modern PM motor technologies offer diversity of interior magnet motors, transverse flux motors, disc type motors, and PM assisted synchronous reluctance motors.

	Electric Motors for the Growth in the Drive Applications By S. Bolognani; N. Bianchi; M. Zigliotto	[View] [Download]
Abstract: Among topics of study related to the drives, an increasing interest to the electric motor can be recognised in the last years, justified by different reasons. The first reason is that industrial and civil world is moving from general-purpose motors to application-oriented motors. Dedicated motors have to meet peculiar specifications and stimulate new specific standards. According to this trend, motors of different type and with different topology are designed to comply with the different requirements. New materials are also available for the motor construction and new manufacturing technologies are experienced. New fields of application are therefore gained and, as a positive feedback, new motors are invented. World globalisation may allow a mass production of electric motors even in the case of application-oriented type. This paper is mainly devoted to the state-of-the-art and the trends in electrical motors for drives. A review of the their market is at first discussed. Then an exam of the most innovative aspects involving the motors is proposed. At last, some significant new application fields are illustrated.

	Motors for Home Applications Development of Environment-Friendly Electric Motors By Y. Takeda; S. Morimoto; H. Murakami	[View] [Download]
Abstract: This paper describes the recent technology and the trends of motors for home applications. The features such as high-efficiency, low-noise, small size and low-cost are demanded for the motors of home applications. The permanent magnet synchronous motor (PMSM) has come to be used as a motor to satisfy such demands in Japan. This paper mainly describes the technology of PMSM design for the compressor drive application such as an air conditioner. The effects of rotor configurations including the arrangement of permanent magnets on the efficiency performance are examined and the stator configurations such as the distributed winding and the concentrated winding are also discussed. The effects of the ratio of magnet torque and reluctance torque on both efficiency and cost are also discussed. Several motors used for the actual electric home appliances such as air conditioner, refrigerator and washer are introduced.