Heat dissipation structure of integrated motor controller and integrated motor controller

The invention relates to an integrated motor controller heat dissipation structure which comprises an electric control shell, an integrated control board, a vehicle-mounted bidirectional power supply power board and a driving power module, and the integrated control board, the vehicle-mounted bidirectional power supply power board and the driving power module are installed in the electric control shell. A three-dimensional water channel used for heat dissipation of the vehicle-mounted bidirectional power supply power board is arranged in the power board cavity and comprises a water channel groove formed in the bottom of the electric control shell and a sealing insert fixedly connected with the water channel groove. The water channel groove is arranged around the vehicle-mounted bidirectional power supply power board, the two ends of the water channel groove are communicated with the water inlet and the water outlet respectively, the shape of the sealing insert is matched with that of the water channel groove,