Disclosed is a canned pump comprising a housing, a rotor contained in the
housing, a circuit substrate supported on the housing, semi-conductor means for
power control attached to the circuit substrate, an end cover attached the housing
to cover the circuit substrate, an a heat sink having heat radiating means for
cooling the semi-conductor means for power control. The semi-conductor means for
power control is mounted on a surface of the circuit substrate facing to the end
cover. The heat sink attached to the circuit substrate to cover the semi-conductor
means for power control.
