EPE Association: EPE 2016 - DS3d: High Performance Drives

EPE 2016 - DS3d: High Performance Drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2016 ECCE Europe - Conference > EPE 2016 - Topic 04: Electrical Machines and Drive Systems > EPE 2016 - DS3d: High Performance Drives

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   High Performance Drive for Electric Vehicles - System Comparison between Three and Six Phase Permanent Magnet Synchronous Machines
By Ralf DOEBLER [View]
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Abstract: In this paper, three different system topologies for a high performance electric vehicle drive are comparedto each other. Next to the classical three phase permanent magnet synchronous machine in differentconnection schemes, also one topology containing a six phase machine has been included intothe study. Suitable inverter topologies are discussed as well as the design of the multiphase winding ofthe six phase machine. For each of the topologies under investigation, identical types of power semiconductordevices available on the market have been defined as well as an identical active volume ofthe inverter. The three system topologies (three phase single star machine with parallel inverters, threephase machine in H-bridge / six leg connection, six phase double star machine) have been compared toeach other regarding their performance as well as their active short circuit and no-load characteristics.It has been shown by means of simulation that the six phase PSM structure offers some remarkableadvantages with regard to its three phase counterparts which makes it adequate for high performanceelectric vehicle drive applications.

   Indirect Field Oriented Control of Linear Induction Motor Based on Optimized Slip Frequency for Traction Application
By KE WANG [View]
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Abstract: The characteristic of linear induction motor (LIM) are quite different from the rotary induction motor (RIM) due to the end effects and so on. The conventional high performance control scheme like indirect field oriented control (IFOC) cannot be directly adopted for LIM drives. In this paper, the traction characteristic of the LIM and RIM are compared from different perspectives. The performance of different control laws of LIM are discussed with consideration of the limitations of traction inverters. The indirect field oriented control scheme based on optimized slip frequency is proposed which can effectively improve the output thrust performance of LIM without primary current increasing. Both simulation and experimental results show the effectiveness of the proposed scheme, which can be adopted for the traction control of LIM drives.

   Inverter Loss Management for an Electrical High-Speed Drive System
By Klaus PETER [View]
[Download]

Abstract: Constant velocity high-speed drives which are typically used in pumps, compressors or fans are supposed to be operated with high efficiency whereas dynamic behavior of the controlled drive system is of secondary priority. To ensure low-loss operation, the switching frequency has to be chosen as low as acceptable to guarantee stable operation without thermal overload of the PM-synchronous machine due to increased occurring voltage and current harmonics. That is why in this contribution pulse patterns of quarter-wave symmetry which are normally optimized offline with regard to certain objectives like the elimination of low-frequency harmonics are used in combination with an optimization algorithm that evaluates and manipulates various switching instants of the used pulse pattern in order to fulfill a given objective like the minimization of switching losses or total harmonic distortion for the current operating point best. Simulation results show that a reduction of switching losses of about 30\% compared to the standard sine-triangular PWM can be achieved.

   Maximum Torque per Ampere Control Using Hill Climbing Method Without Motor Parameters Based on V/f Control
By Jun-ichi ITOH [View]
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Abstract: This paper proposes novel V/f control for interior permanent-magnet synchronous motors (IPMSMs) in order to achieve maximum torque per ampere (MTPA) control without motor parameters such as dq-axis inductance and flux linkage of a permanent magnet. The V/f control does not require either information of a rotor position or the motor parameters in order to construct the control system. However, the conventional MTPA control requires the motor parameters because the control determines the compensation voltage depending on the reactive power. On the other hand, with the proposed MTPA control, a hill climbing method is utilized. The proposed MTPA control calculates the compensation voltage depending on the output current in order to track the MTPA control point without the motor parameters. The validity of the proposed method is confirmed by the experimental results using a 3.7-kW IPMSM. From the experimental results, the magnitude of the phase current is decreased by 56\% at the rated speed. Furthermore, the proposed MTPA control is effective regardless of the magnitude of the load torque.

EPE 2016 - DS3d: High Performance Drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2016 ECCE Europe - Conference > EPE 2016 - Topic 04: Electrical Machines and Drive Systems > EPE 2016 - DS3d: High Performance Drives
	[return to parent folder]

	High Performance Drive for Electric Vehicles - System Comparison between Three and Six Phase Permanent Magnet Synchronous Machines By Ralf DOEBLER	[View] [Download]
Abstract: In this paper, three different system topologies for a high performance electric vehicle drive are comparedto each other. Next to the classical three phase permanent magnet synchronous machine in differentconnection schemes, also one topology containing a six phase machine has been included intothe study. Suitable inverter topologies are discussed as well as the design of the multiphase winding ofthe six phase machine. For each of the topologies under investigation, identical types of power semiconductordevices available on the market have been defined as well as an identical active volume ofthe inverter. The three system topologies (three phase single star machine with parallel inverters, threephase machine in H-bridge / six leg connection, six phase double star machine) have been compared toeach other regarding their performance as well as their active short circuit and no-load characteristics.It has been shown by means of simulation that the six phase PSM structure offers some remarkableadvantages with regard to its three phase counterparts which makes it adequate for high performanceelectric vehicle drive applications.

	Indirect Field Oriented Control of Linear Induction Motor Based on Optimized Slip Frequency for Traction Application By KE WANG	[View] [Download]
Abstract: The characteristic of linear induction motor (LIM) are quite different from the rotary induction motor (RIM) due to the end effects and so on. The conventional high performance control scheme like indirect field oriented control (IFOC) cannot be directly adopted for LIM drives. In this paper, the traction characteristic of the LIM and RIM are compared from different perspectives. The performance of different control laws of LIM are discussed with consideration of the limitations of traction inverters. The indirect field oriented control scheme based on optimized slip frequency is proposed which can effectively improve the output thrust performance of LIM without primary current increasing. Both simulation and experimental results show the effectiveness of the proposed scheme, which can be adopted for the traction control of LIM drives.

	Inverter Loss Management for an Electrical High-Speed Drive System By Klaus PETER	[View] [Download]
Abstract: Constant velocity high-speed drives which are typically used in pumps, compressors or fans are supposed to be operated with high efficiency whereas dynamic behavior of the controlled drive system is of secondary priority. To ensure low-loss operation, the switching frequency has to be chosen as low as acceptable to guarantee stable operation without thermal overload of the PM-synchronous machine due to increased occurring voltage and current harmonics. That is why in this contribution pulse patterns of quarter-wave symmetry which are normally optimized offline with regard to certain objectives like the elimination of low-frequency harmonics are used in combination with an optimization algorithm that evaluates and manipulates various switching instants of the used pulse pattern in order to fulfill a given objective like the minimization of switching losses or total harmonic distortion for the current operating point best. Simulation results show that a reduction of switching losses of about 30\% compared to the standard sine-triangular PWM can be achieved.

	Maximum Torque per Ampere Control Using Hill Climbing Method Without Motor Parameters Based on V/f Control By Jun-ichi ITOH	[View] [Download]
Abstract: This paper proposes novel V/f control for interior permanent-magnet synchronous motors (IPMSMs) in order to achieve maximum torque per ampere (MTPA) control without motor parameters such as dq-axis inductance and flux linkage of a permanent magnet. The V/f control does not require either information of a rotor position or the motor parameters in order to construct the control system. However, the conventional MTPA control requires the motor parameters because the control determines the compensation voltage depending on the reactive power. On the other hand, with the proposed MTPA control, a hill climbing method is utilized. The proposed MTPA control calculates the compensation voltage depending on the output current in order to track the MTPA control point without the motor parameters. The validity of the proposed method is confirmed by the experimental results using a 3.7-kW IPMSM. From the experimental results, the magnitude of the phase current is decreased by 56\% at the rated speed. Furthermore, the proposed MTPA control is effective regardless of the magnitude of the load torque.