| 摘要 |
<p>The invention relates to a speed control unit for the motor of a motor fan system comprising a printed circuit board (40). Electronic components (50), which are disposed on said board, are interconnected by means of electric strips (50) and thermally coupled to a radiator (60). Said one-piece radiator (60) extends along the entire lower surface of the board (40) and comprises first contact areas (61, 62), which are directly thermally coupled to several electronic components (51, 52), and second contact areas (63) which are thermally coupled to equipotential areas located on the lower surface of the printed circuit board (40).</p> |
