EPE Association: EPE 1999 - Topic 05h: Energy Efficient Drives

EPE 1999 - Topic 05h: Energy Efficient Drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1999 - Conference > EPE 1999 - Topic 05: ELECTRICAL MACHINES AND ADJUSTABLE SPEED DRIVES > EPE 1999 - Topic 05h: Energy Efficient Drives

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   A New Field Supply Concept for Industrial Adjustable DC Drives
By G. Lipphardt; S. Huth [View]
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Abstract: A new field supply concept for adjustable DC drives is presented. It consists of an IGBT based buck converter that is supplied by a six-pulse diode bridge which is connected in parallel to the armature converter of the drive. The field winding is connected via an active damped LC-filter. the new concept reduces the complexity of the DC drive system and helps to overcome some of its drawbacks.

   Comparison of Induction and PM Motor Efficiency in HVAC Applications
By F. Abrahamsen; J. K. Pedersen; F. Blaabjerg [View]
[Download]

Abstract: Energy efficiencies are compared for adjustable speed three phase motor drives in HVAC applications, at 2.2 kW and 90 kW rated motor output. The comparison includes standard squirrel-cage induction motors and permanent magnet motors. The drives are controlled with optimal efficiency in the whole operating area, and it is shown that the energy consumption is typically reduced with 6.7 % in 2.2 kW drives and 1.7 % in 90 kW drives by replacing the rotor of a standard induction motor with a motor equipped with surface mounted permanent magnets.

   Drive System Using Three Level Inverter and Two Level Inverter
By Y. Kawabata; Y. Nishiyama; H. Asai; E. Ejiogu; T. Kawabata [View]
[Download]

Abstract: The combining of the outputs of two inverters using inter-phase reactors is a widely used method for supplying large a.c. drives rated at more than several thousands kW. Certain drawbacks are associated with this method, such as high acoustic noise and high losses due to the inter-phase reactors. In this paper, the new proposal we present offers a new approach to the supply of a.c. drives using multiple inverter systems.

   Efficiency Improvement of PMSM in Constant Power Speed Region
By S. Morimoto; M. Sanada; Y. Takeda [View]
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Abstract: Permanent magnet synchronous motors (PMSMs) for the applications such as an electric vehicle, compressor drives of air conditioner and machine tool spindle drives require a wide constant-power speed range. In order to improve the efficiency performance in such applications, this paper has examined the losses and the efficiency characteristics of PMSM mainly in the constant-power speed region over the base speed. The control strategy in order to offer a high-efficiency operation is shown and the effect of saliency ratio on the efficiency performance is examined based on the simulations. The prototype interior PMSM for a wide constant-power operation is designed and several testes are carried out. The experimental results demonstrate that the prototype IPMSM can offer a constant-power speed range of 5:1 and it has a high-efficiency performance in the constantpower speed region.

   Efficiency Optimal Control Method of Induction Motor Drive for Light vehicles
By J. Jelonkiewicz; A. Przybyl [View]
[Download]

Abstract: The paper concerns the efficiency optimal control method in induction motor applied to light vehicles. Significant simplification of the control was reached due to applying neural network estimator of motor's state variables neural network, non-linear function generator as well as stator voltage position generator. the structure is implemented in a microcontroller giving adequate results concerning time of realisation and accuracy. The control circuit is then being tested to get the final verification of its features.

   Thermal Characteristics of an Induction Machine Under Condition o...
By M. Ronkowski; P. Gnacinski [View]
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Abstract: This paper is devoted to an analysis of thermal properties of an induction machine operation under conditions of periodically variable load-torque. The analysis is based on a simplified thermal circuit model (analytical model) for a totally enclosed induction cage motor. Chosen temperature characteristics of 3kW 1415 rpm induction motor for operations with the rated magnetic flux and energy saving mode have been compared.

EPE 1999 - Topic 05h: Energy Efficient Drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1999 - Conference > EPE 1999 - Topic 05: ELECTRICAL MACHINES AND ADJUSTABLE SPEED DRIVES > EPE 1999 - Topic 05h: Energy Efficient Drives
	[return to parent folder]

	A New Field Supply Concept for Industrial Adjustable DC Drives By G. Lipphardt; S. Huth	[View] [Download]
Abstract: A new field supply concept for adjustable DC drives is presented. It consists of an IGBT based buck converter that is supplied by a six-pulse diode bridge which is connected in parallel to the armature converter of the drive. The field winding is connected via an active damped LC-filter. the new concept reduces the complexity of the DC drive system and helps to overcome some of its drawbacks.

	Comparison of Induction and PM Motor Efficiency in HVAC Applications By F. Abrahamsen; J. K. Pedersen; F. Blaabjerg	[View] [Download]
Abstract: Energy efficiencies are compared for adjustable speed three phase motor drives in HVAC applications, at 2.2 kW and 90 kW rated motor output. The comparison includes standard squirrel-cage induction motors and permanent magnet motors. The drives are controlled with optimal efficiency in the whole operating area, and it is shown that the energy consumption is typically reduced with 6.7 % in 2.2 kW drives and 1.7 % in 90 kW drives by replacing the rotor of a standard induction motor with a motor equipped with surface mounted permanent magnets.

	Drive System Using Three Level Inverter and Two Level Inverter By Y. Kawabata; Y. Nishiyama; H. Asai; E. Ejiogu; T. Kawabata	[View] [Download]
Abstract: The combining of the outputs of two inverters using inter-phase reactors is a widely used method for supplying large a.c. drives rated at more than several thousands kW. Certain drawbacks are associated with this method, such as high acoustic noise and high losses due to the inter-phase reactors. In this paper, the new proposal we present offers a new approach to the supply of a.c. drives using multiple inverter systems.

	Efficiency Improvement of PMSM in Constant Power Speed Region By S. Morimoto; M. Sanada; Y. Takeda	[View] [Download]
Abstract: Permanent magnet synchronous motors (PMSMs) for the applications such as an electric vehicle, compressor drives of air conditioner and machine tool spindle drives require a wide constant-power speed range. In order to improve the efficiency performance in such applications, this paper has examined the losses and the efficiency characteristics of PMSM mainly in the constant-power speed region over the base speed. The control strategy in order to offer a high-efficiency operation is shown and the effect of saliency ratio on the efficiency performance is examined based on the simulations. The prototype interior PMSM for a wide constant-power operation is designed and several testes are carried out. The experimental results demonstrate that the prototype IPMSM can offer a constant-power speed range of 5:1 and it has a high-efficiency performance in the constantpower speed region.

	Efficiency Optimal Control Method of Induction Motor Drive for Light vehicles By J. Jelonkiewicz; A. Przybyl	[View] [Download]
Abstract: The paper concerns the efficiency optimal control method in induction motor applied to light vehicles. Significant simplification of the control was reached due to applying neural network estimator of motor's state variables neural network, non-linear function generator as well as stator voltage position generator. the structure is implemented in a microcontroller giving adequate results concerning time of realisation and accuracy. The control circuit is then being tested to get the final verification of its features.

	Thermal Characteristics of an Induction Machine Under Condition o... By M. Ronkowski; P. Gnacinski	[View] [Download]
Abstract: This paper is devoted to an analysis of thermal properties of an induction machine operation under conditions of periodically variable load-torque. The analysis is based on a simplified thermal circuit model (analytical model) for a totally enclosed induction cage motor. Chosen temperature characteristics of 3kW 1415 rpm induction motor for operations with the rated magnetic flux and energy saving mode have been compared.