| 摘要 |
The invention relates to an improvement to the thermal load capacity of generator switches ( 20, 21, 22 ). As is known, radiation plates ( 5, 50, 51, 52 ) are used between generator switches ( 20, 21, 22 ) for different phases (R, Y, B) for convective dissipation of radiated heat from adjacent encapsulation side walls ( 30 b). According to the invention, in the vicinity of the encapsulation cover ( 3 a) of a generator switch ( 20, 21, 22 ), the radiation plate ( 5, 50, 51, 52 ) has at least one angled metal sheet ( 50 a) which is used to guide at least one air flow element ( 9 ) of the rising air flow ( 9 ) in the direction of the encapsulation cover ( 3 a) and in order to direct the flow along the encapsulation cover ( 3 a). Exemplary embodiments include: radiation plates ( 5, 50, 51, 52 ) electrically and thermally isolated from the housing ( 3 ); radiation plates ( 5, 50, 51, 52 ) with horizontally deflecting air guidance structures ( 51 a , 51 c) on the inner face ( 5 a); angled metal sheet ( 50 a) whose inclination is matched to a flattened area ( 30 a) on the encapsulation cover ( 3 a); angled metal sheet ( 50 a) directed at cooling elements ( 6 ) on the encapsulation cover ( 3 a). Advantages include: generator switches ( 20, 21, 22 ) with improved heat emission, increased rated current carrying capacity, and/or a more compact configuration.
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