EPE Association: EPE 2015 - LS5e: Industry Specific Energy Conversion and Conditionning Technologies

EPE 2015 - LS5e: Industry Specific Energy Conversion and Conditionning Technologies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2015 ECCE Europe - Conference > EPE 2015 - Topic 09: Industry-Specific Energy Conversion and Conditioning Technologies > EPE 2015 - LS5e: Industry Specific Energy Conversion and Conditionning Technologies

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   Control strategies for 2-quadrant converter used in grid power flow control
By Sebastian MAESTRI [View]
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Abstract: This work presents the analysis of a two-quadrant regulator connected to the DC-link of a 4-quadrant magnet supply. The key objective is to present some regulation strategies for controlling the peak power required from the power network as well as to recover the magnet energy into capacitor banks. A comparative study that highlights the trade off between the size of reactive elements, and the peak current drawn from the electrical network is presented.

   Heat sink design considerations in medium power electronic applications with long power cycles
By Panagiotis ASIMAKOPOULOS [View]
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Abstract: The aim of this work is to investigate the impact of the heat sink thickness and material, as well as, of the convection coefficient of the water cooling system on the power-electronics module thermal stressing. The heat extraction capability of different thicknesses is tested. It is concluded that the thickest heat sink results in marginally lower temperature variation at the junction level compared to the second thickest one. In the thickest heat sink case, the linear dependence of the thermal resistance on the thickness counteracts the benefit of the increased thermal capacitance. The increase in the cooling medium flow rate, which corresponds to an increase in the convection coefficient between the heat sink bottom surface and the water, can be avoided by increasing the thickness of the heat sink. In this way, the energy consumption of the cooling system is reduced. The increase in the flow rate drastically reduces the thermal stressing in the thinnest heat sink case. The increase of the heat sink thickness can be beneficial for long power cycles. Copper and aluminum are the two materials that are compared, with the copper heat sink exhibiting a slightly increased performance. The study is conducted for a medium power DC-DC converter of a magnet supply with focus on long power cycles.

   HIGH ACCURACY, HIGH BANDWIDTH MAGNETORESISTIVE CURRENT SENSORS FOR SPACECRAFT POWER ELECTRONICS
By Rolf SLATTER [View]
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Abstract: The usage of magnetoresistive (MR) current sensors is increasing steadily in the field of power electronics. Current sensors must not only be accurate and dynamic, but must also be compact and robust. The MR effect is the basis for current sensors with a unique combination of precision and bandwidth in a compact package. A space-qualifiable magnetoresistive current sensor with high accuracy and high bandwidth is being jointly developed by the sensor manufacturer Sensitec and the spacecraft power electronics supplier Thales Alenia Space (TAS) Belgium. Test results for breadboards incorporating commercial-off-the-shelf (COTS) sensors are presented as well as an application example in the electronic control and power unit for the thrust vector actuators of the Ariane 6 launcher. First prototypes of the space-qualifiable sensor have been manufactured and tested successfully exhibiting high linearity, minimal hysteresis and excellent dy-namic performance.

   Measurements on Prototype Inductive Adders with Extreme Flat-top Output Pulses for CLIC Damping Ring Extraction Kickers
By Janne HOLMA [View]
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Abstract: The specifications of the extraction kicker systems for the damping rings of the Compact Linear Collider call for 160 ns duration flat-top pulses of ±12.5 kV, 250 A, with combined ripple and droop of ±0.02 \%. Pulse waveforms of two 3.5 kV prototype inductive adders have demonstrated ±0.05 \% relative flat-top stability.

EPE 2015 - LS5e: Industry Specific Energy Conversion and Conditionning Technologies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2015 ECCE Europe - Conference > EPE 2015 - Topic 09: Industry-Specific Energy Conversion and Conditioning Technologies > EPE 2015 - LS5e: Industry Specific Energy Conversion and Conditionning Technologies
	[return to parent folder]

	Control strategies for 2-quadrant converter used in grid power flow control By Sebastian MAESTRI	[View] [Download]
Abstract: This work presents the analysis of a two-quadrant regulator connected to the DC-link of a 4-quadrant magnet supply. The key objective is to present some regulation strategies for controlling the peak power required from the power network as well as to recover the magnet energy into capacitor banks. A comparative study that highlights the trade off between the size of reactive elements, and the peak current drawn from the electrical network is presented.

	Heat sink design considerations in medium power electronic applications with long power cycles By Panagiotis ASIMAKOPOULOS	[View] [Download]
Abstract: The aim of this work is to investigate the impact of the heat sink thickness and material, as well as, of the convection coefficient of the water cooling system on the power-electronics module thermal stressing. The heat extraction capability of different thicknesses is tested. It is concluded that the thickest heat sink results in marginally lower temperature variation at the junction level compared to the second thickest one. In the thickest heat sink case, the linear dependence of the thermal resistance on the thickness counteracts the benefit of the increased thermal capacitance. The increase in the cooling medium flow rate, which corresponds to an increase in the convection coefficient between the heat sink bottom surface and the water, can be avoided by increasing the thickness of the heat sink. In this way, the energy consumption of the cooling system is reduced. The increase in the flow rate drastically reduces the thermal stressing in the thinnest heat sink case. The increase of the heat sink thickness can be beneficial for long power cycles. Copper and aluminum are the two materials that are compared, with the copper heat sink exhibiting a slightly increased performance. The study is conducted for a medium power DC-DC converter of a magnet supply with focus on long power cycles.

	HIGH ACCURACY, HIGH BANDWIDTH MAGNETORESISTIVE CURRENT SENSORS FOR SPACECRAFT POWER ELECTRONICS By Rolf SLATTER	[View] [Download]
Abstract: The usage of magnetoresistive (MR) current sensors is increasing steadily in the field of power electronics. Current sensors must not only be accurate and dynamic, but must also be compact and robust. The MR effect is the basis for current sensors with a unique combination of precision and bandwidth in a compact package. A space-qualifiable magnetoresistive current sensor with high accuracy and high bandwidth is being jointly developed by the sensor manufacturer Sensitec and the spacecraft power electronics supplier Thales Alenia Space (TAS) Belgium. Test results for breadboards incorporating commercial-off-the-shelf (COTS) sensors are presented as well as an application example in the electronic control and power unit for the thrust vector actuators of the Ariane 6 launcher. First prototypes of the space-qualifiable sensor have been manufactured and tested successfully exhibiting high linearity, minimal hysteresis and excellent dy-namic performance.

	Measurements on Prototype Inductive Adders with Extreme Flat-top Output Pulses for CLIC Damping Ring Extraction Kickers By Janne HOLMA	[View] [Download]
Abstract: The specifications of the extraction kicker systems for the damping rings of the Compact Linear Collider call for 160 ns duration flat-top pulses of ±12.5 kV, 250 A, with combined ripple and droop of ±0.02 \%. Pulse waveforms of two 3.5 kV prototype inductive adders have demonstrated ±0.05 \% relative flat-top stability.