EPE Association: EPE 2014 - LS3c: Inverters/Drive Issues

EPE 2014 - LS3c: Inverters/Drive Issues
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2014 ECCE Europe - Conference > EPE 2014 - Topic 04: Electrical Machines and Drive Systems > EPE 2014 - LS3c: Inverters/Drive Issues

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   Design of an Active Front End for a Modular Double-Cascade converter
By Arto SANKALA, Juhamatti KORHONEN, Mikko PURHONEN, Juha-Pekka STRÖM, Pertti SILVENTOINEN, Risto KOMULAINEN, Hannu SARÉN, Nicklas SÖDÖ, Stefan STRANDBERG [View]
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Abstract: Modular Double-Cascade converter is a multilevel frequency converter which has two sets of cascaded H-bridges as input and output power stages. This paper presents the topology-specific advantages that an active front end offers to the system together with an example design of the active front end controller and LCL filter.

   Energy Optimal Pulse Pattern for Z-Source Inverter to Increase the Efficiency of Drive Systems in Automotive Applications
By Stephan TENNER [View]
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Abstract: In automotive applications, the Z-source inverter is a single stage inverter that provides the useful feature of boosting the DC-link voltage to a desired value independently of the battery voltage. The advantage of an adjustable DC-link voltage can be used as a degree of freedom for a loss minimized control of electric drives. However, the semiconductors experience high stress during boost operation. This paper presents pulse patterns that reduce power electronic losses during boost operation.

   Implementation and Evaluation of Inverter Loss Modeling as Part of DB-DTFC for Loss Minimization Each Switching Period
By Michael SAUR, Wei XU, Bernhard PIEPENBREIER, Robert LORENZ [View]
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Abstract: This paper presents the experimental evaluation of a flux linkage-based inverter loss model embedded in a deadbeat-direct torque and flux control (DB-DTFC) that achieves desired torque and minimizes losses over each switching period. The optimal flux commands are selected from those that will achieve the desired torque by using embedded dynamic flux linkage-based loss models of the machine and inverter. The proposed inverter loss model is implemented in real-time on a flux weakening interior permanent magnet synchronous machine (FW-IPMSM) test bench and evaluated experimentally. The actual inverter losses are obtained by measuring the electrical power at three different points in the test bench. In order to evaluate the loss model, comparative evaluation of the actual inverter losses versus the estimated losses have been performed under both constant stator flux and dynamic flux trajectories. Finally, losses resulting from using different widely used loss minimizing control strategies are compared.

   Modeling the Influence of Commutation in Voltage Source Inverters on Rotor Losses of Permanent Magnet Machines
By Marko MERDZAN, Aleksandar BORISAVLJEVIC, Elena LOMONOVA [View]
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Abstract: Rotor losses in inverter-fed permanent magnet (PM) machines depend on stator current waveform andconsequently on inverter output voltage. These losses can be very harmful due to the vulnerability ofmagnets to heat. In this study, the rotor losses in high-speed PM machines supplied by voltage-sourcePWM inverters were analytically correlated with the inverter switching parameters. An analytical modelwhich shows the dependency of the rotor losses on a frequency modulation ratio was derived. Thederived model was verified by a 2D transient finite element model.

EPE 2014 - LS3c: Inverters/Drive Issues
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2014 ECCE Europe - Conference > EPE 2014 - Topic 04: Electrical Machines and Drive Systems > EPE 2014 - LS3c: Inverters/Drive Issues
	[return to parent folder]

	Design of an Active Front End for a Modular Double-Cascade converter By Arto SANKALA, Juhamatti KORHONEN, Mikko PURHONEN, Juha-Pekka STRÖM, Pertti SILVENTOINEN, Risto KOMULAINEN, Hannu SARÉN, Nicklas SÖDÖ, Stefan STRANDBERG	[View] [Download]
Abstract: Modular Double-Cascade converter is a multilevel frequency converter which has two sets of cascaded H-bridges as input and output power stages. This paper presents the topology-specific advantages that an active front end offers to the system together with an example design of the active front end controller and LCL filter.

	Energy Optimal Pulse Pattern for Z-Source Inverter to Increase the Efficiency of Drive Systems in Automotive Applications By Stephan TENNER	[View] [Download]
Abstract: In automotive applications, the Z-source inverter is a single stage inverter that provides the useful feature of boosting the DC-link voltage to a desired value independently of the battery voltage. The advantage of an adjustable DC-link voltage can be used as a degree of freedom for a loss minimized control of electric drives. However, the semiconductors experience high stress during boost operation. This paper presents pulse patterns that reduce power electronic losses during boost operation.

	Implementation and Evaluation of Inverter Loss Modeling as Part of DB-DTFC for Loss Minimization Each Switching Period By Michael SAUR, Wei XU, Bernhard PIEPENBREIER, Robert LORENZ	[View] [Download]
Abstract: This paper presents the experimental evaluation of a flux linkage-based inverter loss model embedded in a deadbeat-direct torque and flux control (DB-DTFC) that achieves desired torque and minimizes losses over each switching period. The optimal flux commands are selected from those that will achieve the desired torque by using embedded dynamic flux linkage-based loss models of the machine and inverter. The proposed inverter loss model is implemented in real-time on a flux weakening interior permanent magnet synchronous machine (FW-IPMSM) test bench and evaluated experimentally. The actual inverter losses are obtained by measuring the electrical power at three different points in the test bench. In order to evaluate the loss model, comparative evaluation of the actual inverter losses versus the estimated losses have been performed under both constant stator flux and dynamic flux trajectories. Finally, losses resulting from using different widely used loss minimizing control strategies are compared.

	Modeling the Influence of Commutation in Voltage Source Inverters on Rotor Losses of Permanent Magnet Machines By Marko MERDZAN, Aleksandar BORISAVLJEVIC, Elena LOMONOVA	[View] [Download]
Abstract: Rotor losses in inverter-fed permanent magnet (PM) machines depend on stator current waveform andconsequently on inverter output voltage. These losses can be very harmful due to the vulnerability ofmagnets to heat. In this study, the rotor losses in high-speed PM machines supplied by voltage-sourcePWM inverters were analytically correlated with the inverter switching parameters. An analytical modelwhich shows the dependency of the rotor losses on a frequency modulation ratio was derived. Thederived model was verified by a 2D transient finite element model.