Electric motor control apparatus

An electric motor control apparatus comprising:

• a metal board equipped with a driver circuit configured to drive an electric motor;
• a control board opposing to the metal board in parallel, and equipped with a control circuit configured to control the driver circuit;
• a board connecting terminal configured to electrically connect the metal board and the control board to each other;
• an external connector configured to electrically connect an external apparatus to one of the metal board and the control board;
• a rotation sensor mounted on the control board and configured to detect rotation of a rotation shaft of the electric motor;
• a cabinet that comprises, on its one side, a storage configured to store the metal board, the control board, and the board connecting terminal, the cabinet having the electric motor installed on its other side;
• and
• a lid configured to be engaged with the cabinet so as to close the storage,
• wherein the lid comprises:
• a fixing surface to which the metal board is fixed so that a metal surface of the metal board is in contact with the fixing surface;
• a through bore which is provided in laterally close proximity to the fixing surface, and from which a mating part of the external connector is exposed, a harness connected to the external apparatus being mated with the mating part;
• a fixing edge which is an edge of the through bore on the storage side, and to which a housing of the external connector is fixed;
• and
• a plurality of fixing pedestals which project from a circumference of the fixing surface, and to which the control board is fixed,
• wherein the external connector comprises:
• a first terminal configured to be electrically connected to the metal board;
• and
• a second terminal configured to be electrically connected to the control board,
• wherein a direction of connecting the first terminal of the external connector to the metal board fixed to the fixing surface of the lid is one direction being perpendicular to the metal board, and
• wherein a direction of connecting the control board to the second terminal of the external connector fixed to the fixing edge of the lid is identical to the direction of connecting the first terminal to the metal board.