Cooling structure for inverter device

摘要

A cooling structure for an inverter (31) controls a motor (6) to drive an automobile. This inverter device (22) includes a power circuit section (28) having an inverter (31) to convert a DC power of a battery (19) to an AC power for the motor (6), and a casing (39) enclosing the power circuit section (28). A fin (41) is provided in an outer surface of the casing (39), a coolant path (42) for the flow of a cooling medium is provided within the casing (39) or in the outer surface thereof, and a pump (43) circulating the cooling medium in the coolant path (42) is disposed on or in the casing (39). With this structure, the flow resistance for cooling the inverter (31) is reduced to allow the pump (43) to be downsized and a proper cooling can be accomplished to the amount of heat by the inverter (31).

主权项

1. A cooling structure for an inverter device to control an automobile driving motor, which inverter device comprises:
a power circuit section including an inverter configured to convert a direct current power of a battery to an alternating current power for driving the motor, and an inverter casing to enclose the power circuit section; and a fin provided in an outer surface area of the inverter casing, a coolant flow path provided within the inverter casing or in the outer surface area for the flow of a cooling medium therethrough, and a pump disposed on or in the inverter casing to circulate the cooling medium within the coolant flow path.