Power electronics section of a starter-generator without a commutator

A rotating machine assembly, comprising;

• a rotating machine including
• a cover that defines an outer surface of the rotating machine;
• a stator disposed within the cover, the stator being stationary with respect to the cover;
• a shaft rotatably disposed at least partially within the cover so as to define a rotation axis, the shaft including a first end that is connectable to an aircraft engine and a second end that is opposite the first end;
• a rotor attached to the shaft, the rotor being movable with respect to the stator;
• a power module including at least one MOSFET that periodically reverses an electrical current direction of the rotor, wherein the power module including the at least one MOSFET is disposed within the cover;
• and
• a control enclosure with a control module disposed within, wherein the control module is separate from and distinct from the power module and the control enclosure is mounted on the cover of the rotating machine so as to be external to and attached to the rotating machine.

A rotating machine assembly, comprising;

• a rotating machine including
• a cover that defines an outer surface of the rotating machine;
• a stator disposed within the cover, the stator being stationary with respect to the cover;
• a shaft rotatably disposed at least partially within the cover so as to define a rotation axis, the shaft including a first end that is connectable to an aircraft engine and a second end that is opposite the first end;
• a rotor attached to the shaft, the rotor being movable with respect to the stator;
• a power module including at least one MOSFET that periodically reverses an electrical current direction of the rotor, wherein the power module including the at least one MOSFET is disposed within the cover;
• and
• a chassis at least partially disposed adjacent the second end of the shaft, wherein the power module including the at least one MOSFET is attached to the chassis and the chassis defines an air tunnel in fluid communication with the rotor so as to transfer heat away from the at least one MOSFET,
• wherein the chassis includes a main body portion and an inlet portion disposed at opposite ends thereof, the inlet portion and the first end of the shaft being disposed at opposite ends of the rotating machine assembly such that main body portion is disposed therebetween, and wherein the chassis is received in the cover,
• wherein the main body portion defines a main body inner perimeter and a main body outer perimeter and the inlet portion defines an inlet inner perimeter and an inlet outer perimeter, and wherein the main body outer perimeter is greater than the inlet outer perimeter and the main body inner perimeter.