H ELECTRICITY
H05 ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
H05K PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
H05K7/00 Constructional details common to different types of electric apparatus
H05K7/20 Modifications to facilitate cooling, ventilating, or heating
H05K7/2089 for power electronics, e.g. for inverters for controlling motor
H05K7/20909 Forced ventilation, e.g. on heat dissipaters coupled to components