EPE Association: EPE 1985 - 29 - Lecture Session 5.4: CONVERTER TOPOLOGY

EPE 1985 - 29 - Lecture Session 5.4: CONVERTER TOPOLOGY
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   EVAPORATION COOLING SYSTEMS FOR CONVERTERS ON TRACTION VEHICLES
By E. Klein; W. Lienau [View]
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Abstract: The evaporation cooling system has been applied increasingly in recent years to selfcommutated converters for various urban railway systems. With evaporation cooling one makes use of the physical phenomenon that a boiling liquid at constant pressure will not change its tempareture when heat is either added or removed. The fluorine-chlorine derivative of ethane, R 113, has turned out to be the optimum coolant for evaporation cooling applications. This cooling system requires no pump because boiling vapour is used as the medium to carry the heat of the electrical components to the condensator with a large surface area. The immersion and nonimmersion cooling are discussed. Mainly, the can cooling for semiconductors is considered. BBC Brown Boveri designs and builds converters with evaporation cooling for various urban railway systems.

   TWO PHASE COOLING OF LARGE DIAMETER POWER THYRISTORS
By P. Bordignon; E. Latrofa [View]
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Abstract: The paper refers on the technical aspects and performances of a new cooling system based on two-phase free convection heat transfer of dielectric liquids. The new technology, wich foresees the immersion of the electronic subassemblies in the liquid pool or alternatively the use of cooling block, takes advantage of the two-phase thermosyphon principle. This permits the full utilization of the current handling capability of thyristors with largest diameter of the silicon wafer, maintaining an external air cooling solution and guaranteeing a very compact design. In the near future it is foreseen to adopt this cooling method in low and medium voltage large power converters for example for AC and DC drives and for static var compensators.

EPE 1985 - 29 - Lecture Session 5.4: CONVERTER TOPOLOGY
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1985 - Conference > EPE 1985 - 29 - Lecture Session 5.4: CONVERTER TOPOLOGY
	[return to parent folder]

	EVAPORATION COOLING SYSTEMS FOR CONVERTERS ON TRACTION VEHICLES By E. Klein; W. Lienau	[View] [Download]
Abstract: The evaporation cooling system has been applied increasingly in recent years to selfcommutated converters for various urban railway systems. With evaporation cooling one makes use of the physical phenomenon that a boiling liquid at constant pressure will not change its tempareture when heat is either added or removed. The fluorine-chlorine derivative of ethane, R 113, has turned out to be the optimum coolant for evaporation cooling applications. This cooling system requires no pump because boiling vapour is used as the medium to carry the heat of the electrical components to the condensator with a large surface area. The immersion and nonimmersion cooling are discussed. Mainly, the can cooling for semiconductors is considered. BBC Brown Boveri designs and builds converters with evaporation cooling for various urban railway systems.

	TWO PHASE COOLING OF LARGE DIAMETER POWER THYRISTORS By P. Bordignon; E. Latrofa	[View] [Download]
Abstract: The paper refers on the technical aspects and performances of a new cooling system based on two-phase free convection heat transfer of dielectric liquids. The new technology, wich foresees the immersion of the electronic subassemblies in the liquid pool or alternatively the use of cooling block, takes advantage of the two-phase thermosyphon principle. This permits the full utilization of the current handling capability of thyristors with largest diameter of the silicon wafer, maintaining an external air cooling solution and guaranteeing a very compact design. In the near future it is foreseen to adopt this cooling method in low and medium voltage large power converters for example for AC and DC drives and for static var compensators.