Abstract: An electric turbo compressor including a housing, an electric motor, and a rotating body driven to rotate by the electric motor. The rotating body includes a rotary shaft, a first impeller, and a second impeller. The first impeller includes a first hub fixed to the rotary shaft, and a plurality of first blades arranged on the first hub, and the second impeller includes a second hub fixed to the rotary shaft, and a plurality of second blades arranged on the second hub. In the rotating body, mass of part of the rotating body from one ends to the other ends of the first blades along the axial direction is greater than mass of part of the rotating body from one ends to the other ends of the second blades along the axial direction.

Abstract: An electric turbo compressor includes a first impeller includes a first hub fixed to the rotary shaft, and a plurality of first blades arranged on the first hub, a second impeller includes a second hub fixed to the rotary shaft, and a plurality of second blades arranged on the second hub. A housing includes a first shroud facing the first blades and forming a first impeller chamber that accommodates the first impeller, and a second shroud facing the second blades and forming a second impeller chamber that accommodates the second impeller. A first trailing end gap that is a gap between the trailing end of each of the first blades and the first shroud is smaller than a second trailing end gap that is a gap between the trailing end of each of the second blades and the second shroud.