EPE Association: EPE 2020 - DS3l-1: Power Converters for Electric Vehicles-1

EPE 2020 - DS3l-1: Power Converters for Electric Vehicles-1
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 08: Electric Vehicle Propulsion Systems and their Energy Storage > EPE 2020 - DS3l-1: Power Converters for Electric Vehicles-1

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   Dual-loop Control Scheme with Optimized Type-III Controller based on Genetic Algorithm for 6-phase Interleaved Converter for Electric Drivetrains
By Duong TRAN [View]
[Download]

Abstract: This paper presents an optimization procedure based on a genetic algorithm for the dual-loop control scheme employing type-III controllers for a 6-phase interleaved converter. The optimized type-III current- and voltage-controllers are derived from four different objective functions that represent for their control costs. A comparative step response performance of these type-III controllers using the optimization objective functions is carried out to select a final optimized design to be compared with `k-factor' approach design. To this end, experimental results with two testing scenarios are provided for the theory validation. In this regard, 40kW static testing confirms the validity of the proposed dual-loop control scheme. Besides, with 50\% step load change at maximum 12kW, dynamic testing can verify the advantages of optimized controllers over the classical `k-factor' counterpart.

   Efficiency and Cost Comparison of B6 and Hybrid ANPC Converters for Traction Drives
By Johannes HÄRING [View]
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Abstract: Changing boundary conditions in electric drives like increasing DC-link voltage or new semiconductordevelopments open a door for new converter structures like different types of the ANPC converter. Sincesystem cost is a very important criterion in the automotive industry, these converter structures must beexamined to evaluate their suitability as traction converters.

   Elimination/Mitigation of Output Voltage Harmonics for Multilevel Converters Operated at Fundamental Switching Frequency using Matlab's Genetic Algorithm Optimi
By Anton KERSTEN [View]
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Abstract: This paper deals with the optimization of the output voltage waveform of a multilevel converter operated with fundamental frequency switching. For a high number of output voltage levels, nearest-level control is typically used, whereas an optimized waveform can be presumably used to eliminate a selection of low order harmonics. A nonlinear optimization problem for any kind of multilevel inverter, operating in a single or three-phase arrangement, is formulated. It is shown that the set of nonlinear equations, defining this optimization problem, cannot be numerically solved, if the number of output voltage levels is higher than nine. Thus, an optimization algorithm, e.g., Matlab's genetic algorithm, should be used instead. Based on the concept of the weighted THD, it is shown that an optimized waveform has no effect on the output current's quality of a single phase multilevel converter. However, considering an ungrounded three-phase system, the content of the to be eliminated harmonic components is shifted towards the triplen harmonics and, consequently, the expected current quality, based on theWTHD, can be significantly improved.

EPE 2020 - DS3l-1: Power Converters for Electric Vehicles-1
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 08: Electric Vehicle Propulsion Systems and their Energy Storage > EPE 2020 - DS3l-1: Power Converters for Electric Vehicles-1
	[return to parent folder]

	Dual-loop Control Scheme with Optimized Type-III Controller based on Genetic Algorithm for 6-phase Interleaved Converter for Electric Drivetrains By Duong TRAN	[View] [Download]
Abstract: This paper presents an optimization procedure based on a genetic algorithm for the dual-loop control scheme employing type-III controllers for a 6-phase interleaved converter. The optimized type-III current- and voltage-controllers are derived from four different objective functions that represent for their control costs. A comparative step response performance of these type-III controllers using the optimization objective functions is carried out to select a final optimized design to be compared with `k-factor' approach design. To this end, experimental results with two testing scenarios are provided for the theory validation. In this regard, 40kW static testing confirms the validity of the proposed dual-loop control scheme. Besides, with 50\% step load change at maximum 12kW, dynamic testing can verify the advantages of optimized controllers over the classical `k-factor' counterpart.

	Efficiency and Cost Comparison of B6 and Hybrid ANPC Converters for Traction Drives By Johannes HÄRING	[View] [Download]
Abstract: Changing boundary conditions in electric drives like increasing DC-link voltage or new semiconductordevelopments open a door for new converter structures like different types of the ANPC converter. Sincesystem cost is a very important criterion in the automotive industry, these converter structures must beexamined to evaluate their suitability as traction converters.

	Elimination/Mitigation of Output Voltage Harmonics for Multilevel Converters Operated at Fundamental Switching Frequency using Matlab's Genetic Algorithm Optimi By Anton KERSTEN	[View] [Download]
Abstract: This paper deals with the optimization of the output voltage waveform of a multilevel converter operated with fundamental frequency switching. For a high number of output voltage levels, nearest-level control is typically used, whereas an optimized waveform can be presumably used to eliminate a selection of low order harmonics. A nonlinear optimization problem for any kind of multilevel inverter, operating in a single or three-phase arrangement, is formulated. It is shown that the set of nonlinear equations, defining this optimization problem, cannot be numerically solved, if the number of output voltage levels is higher than nine. Thus, an optimization algorithm, e.g., Matlab's genetic algorithm, should be used instead. Based on the concept of the weighted THD, it is shown that an optimized waveform has no effect on the output current's quality of a single phase multilevel converter. However, considering an ungrounded three-phase system, the content of the to be eliminated harmonic components is shifted towards the triplen harmonics and, consequently, the expected current quality, based on theWTHD, can be significantly improved.