Electric pump

An electric pump, comprising:

• a motor portion including a motor rotor that rotates by a rotary drive force;
• a pump portion being operated by the motor rotor of the motor portion;
• a control portion controlling an electric power being supplied to the motor portion;
• a pump housing of the pump portion;
• a motor housing of the motor portion;
• and
• a case of the control portion, wherein
• the pump portion, the motor portion, and the control portion are integrally connected with one another,
• the pump housing, the motor housing, and the case are stacked with one another in the aforementioned order in a direction along a drive axis of the motor rotor, and are connectively fixed with one another,
• the control portion includes a control circuit board controlling the electric power supplied to the motor portion,
• the control circuit board is supported on a surface of the control portion opposite to a portion where the pump portion of the pump housing is disposed,
• the case is disposed to cover the control circuit board,
• the control portion includes an electric power control element and a temperature sensor being provided at the same board surface of the control circuit board, the board surface being disposed at a position facing an inner surface of an area of the case, the area being exposed to external air,
• the control portion is disposed at a position being adjacent to the motor portion,
• the electric power control element controlling the electric power supplied to the motor portion, the control circuit board including a heat conduction resistance portion being disposed between the temperature sensor and the electric power control element, and
• the heat conduction resistance portion serves as a cutout portion in which a part of the control circuit board, the part being disposed at an intermediate position between the electric power control element and the temperature sensor, is removed.