| 摘要 |
FIELD: electrical engineering; static converters. SUBSTANCE: proposed device used for heating and cooling electronic devices designed to meet stringent requirements to degree of protection according to code IP54, IP64 in compliance with State Standard GOST 14254-96 and to ensure trouble-free operation of power unit and converter as a whole in comprehensive ambient temperature range of -60 to +50 C is made in the form of closed circuit filled with nonfreezing fluid that incorporates pump with suction and delivery lines, fluid heating and cooling systems. Device has control unit electrically connected to temperature transducer, heating and cooling systems; it is provided with cooler mounting semiconductor power devices and temperature transducers, pump, fluid tank, heating and cooling units, and expansion tank. Cooler is provided with through passages under each rib over its entire length and stepped drillings on upper and lower surfaces disposed closer to cooler center and used to provide communication with adjacent through passages. Drillings of adjacent through passages on upper and lower butt-end surfaces are staggered and plugs are installed in drillings made in upper and lower butt-end surfaces and disposed closer to external surfaces of cooler with the result that fluid-filled channel is formed in cooler originating from lower part of one side surface and running under each cooler rib up to other side surface. Heating unit may be installed directly in fluid tank and fluid may be cooled in drain line provided inside wall-mounted cooling unit. Cooling of fluid tank and additional cooling of cooler accommodating semiconductor power devices may be effected at a time by means of fans. EFFECT: enhanced effectiveness of system, reduced mass, size, and cost of converter due to its single-cabinet arrangement. 4 cl, 18 dwg |
