Compact heat radiation structure of electromobile motor control unit

The utility model discloses a compact heat radiation structure of an electromobile motor control unit. The structure comprises a low voltage power element, a printed circuit board and a controller shell. The low voltage power element is mounted on the printed circuit board through a pin. The printed circuit board is fixed in the controller shell through screws. The structure also comprises heat-conducting silicone grease. The controller shell is provided with a boss at a position where the low voltage power element is arranged on the printed circuit board. The heat-conducting silicone grease is arranged between the boss and the printed circuit board. The structure achieves the good heat radiation effect of the low voltage power element without increasing the cost of the whole motor control unit, so that the normal operation of the low voltage power element is ensured, and the temperature rise of the low voltage power element meets system requirements.