Abstract:
A high power-density power converter (500) employs a liquid cooling system (200) to cool its transformers (120). In an embodiment, the coils (135) of a transformer (100) are embedded in a heat-conducting solid (epoxy or resin). The resin-embedded coils (135) are in physical/thermal contact with cold plates (160), which are sandwiched between the coils (135) and/or in contact with exterior surfaces of the coils (135). The cold plates (160) may additionally or alternatively be in physical/thermal contact with the transformer core (145). Coolant fluid is pumped through the cold plates (160). In another embodiment, the transformer is (120) is immersed in a coolant fluid (740), such as oil, within a heat management enclosure (710). Cold plates (160) are in physical/thermal contact with the enclosure (710). Coolant liquid (240) pumped through the cold plates (160) conducts heat away from the oil-enclosed transformer (700).
Abstract:
A non-liquid immersed transformer is provided. The transformer comprises a magnetic core and a coil winding forming a plurality of winding turns around the magnetic core and a cooling system. The cooling system comprises a heat exchanger, a main feeding pipe and a main return pipe, and a cooling pipe for the flow of a cooling fluid. The cooling pipe extends at least partly along the coil winding between a first point adjacent to an end of the coil winding, and a second point adjacent to the other end of the coil winding. The cooling pipe also comprises a plurality of convolutions to extend the path of the cooling fluid between one end of the winding and one of the main feeding pipe and the main return pipe.
Abstract:
Die Erfindung betrifft eine Anordnung elektrischer Leiter, umfassend ein Leiterbündel mit mindestens einem elektrischen Einzelkabel und wenigstens einer Kühlleitung zur Durchströmung mit einem Kühlfluid. Zur thermischen Anbindung des Leiterbündels an die wenigstens eine Kühlleitung sind ein Abschnitt der wenigstens einen Kühlleitung und das Leiterbündel in ein Niedrigschmelztemperatur-Metall eingebettet, wobei eine isolierende Ummantelung des wenigstens einen Einzelkabels als KunststoffIsolierung, vorzugsweise als Polyimid-Isolierung oder als eine Polyester-Isolierung, ausgeführt ist. Die Erfindung betrifft ferner ein Herstellungsverfahren für eine derartige Anordnung.
Abstract:
Eine flüssigkeitsgekühlte elektromagnetische Komponente (Drossel, Transformator) besteht aus mehreren scheibenförmigen Spulen (4, 4') mit einer oder mehreren Windungen und dazwischen liegenden Flachkühlern (5), wobei mindestens 2 Scheibenspulen (4, 4') einem Flachkühler (5) zugeordnet sind und bei der alle Wicklungselemente (Windungen der Spule) direkten thermischen Kontakt zu den Oberflächen der Flachkühler (5) aufweisen. Verwendungen findet diese Komponente in Stromrichteranlagen und in Mittelfrequenzanlagen.
Abstract:
A transformer using a separating type heat pipe for radiating heat includes a transformer member, a separating type heat pipe and a heat exchanger. The oil box of the transformer is connected with the heat source box of the heat exchanger, and the transformer oil is the heat source of the heat exchanger, and the heat gatherer of the heat exchanger is the heat absorber of the separating type heat pipe, and the heat-absorbing medium of the heat gatherer is also the working liquid of the heat pipe. The heat-absorbing medium of the heat gatherer absorbs the heat from the transformer oil and produces steam, and the steam is transmitted to the heat radiator via a steam-transmitting pipe and condensed into liquid after radiating the heat, and the condensed liquid condensate returns to the heat absober via liquid-returning pipe under the gravitational function, and then the circular process of the heat-absorbing, heat-radiating, the evaporation, the condensation, the steam-transmitting and the liquid-returning is finished to realize the purpose of transmitting the heat of the transformer to the far heat radiator. In the above heat-radiating circular process, the transformer oil flows circularly under the pressure difference from the oil temperature density difference, and the working medium in the heat pipe flows upon the gravitation without circular pump and no noises produced. And the heat medium is separated with the transformer oil, so it doesn't influence the insulation of the transformer oil.
Abstract:
A system (27) for reducing the temperature of cooling oil for a power transformer (12) includes a heat exchanger (44) interposed in the cooling oil system. The heat exchanger (44) relies upon a liquid-to-liquid exchange of heat from the heated oil to a coolant flowing through the heat exchanger. In one embodiment, the coolant provided to the heat exchanger is obtained from an absorption chiller (65). Heat energy is provided to the chiller (65) from a heat storage device (80). In a specific embodiment, the heat storage source (80) can be a phase change material device. In a preferred cooling system, a programmable controller (55) determines the activation and operation of the system. The controller (55) can sense transformer or cooling oil temperature to trigger activation. In a preferred embodiment, the controller (55) compares a current temperature history against a temperature profile to anticipate increased cooling requirements. In certain embodiment, excess, off-peak or waste heat from the transformer (12) itself is provided to the heat storage device (80) or to the phase change heat exchanger.