Rotating electrical machine

A rotating electrical machine comprising:

• a motor including a rotation shaft, a rotor fixed to the rotation shaft, a stator disposed outside the rotor, a winding wound around the stator, and a motor case accommodating the rotation shaft, the rotor, and the stator;
• a control unit configured to control the motor;
• and
• a housing that is disposed between the stator and the control unit in an axial direction along the rotation shaft and that has a shaft through-hole into which the rotation shaft is inserted,
• wherein the control unit has a substrate on which a heat generation unit is mounted,
• the housing has a main body portion and a case attachment portion that protrudes from the main body portion toward a stator and that is attached to the motor case,
• the housing has a heat transfer surface that faces the substrate and that is disposed at a position of overlapping the heat generation unit in the axial direction,
• a heat dissipating member thermally connecting the heat transfer surface and the heat generation unit is provided between the heat transfer surface and the heat generation unit,
• at least a part of the heat transfer surface is disposed at a position of overlapping the case attachment portion in the axial direction,
• a sensor rotor is attached to the rotation shaft, and a rotation sensor is mounted on the substrate to face the sensor rotor in the axial direction,
• a motor connection hole connected to a motor terminal portion extending from the winding is formed in the substrate,
• a power circuit including a capacitor, a shunt resistor, and a switching element is mounted on the substrate, the shunt resistor and the switching element being the heat generation units
• when viewed from the axial direction, at least a part of the power circuit is disposed between the motor connection hole and the rotation sensor, along with having a position which is closer to the motor connection hole than a position of the rotation sensor.