Aircraft propulsion system with shielded electric machine

An assembly for an aircraft propulsion system, comprising:

• a housing structure including an inner housing structure and an outer housing structure that is disposed radially outboard of the inner housing structure, the inner housing structure including an engine case and a nacelle structure that at least partially covers the engine case;
• a propulsor rotor housed within the outer housing structure;
• an engine core configured to drive rotation of the propulsor rotor, the engine core housed within the engine case, and the engine core including a compressor section, a combustor section and a turbine section;
• an electric machine disposed in a compartment between the engine case and the nacelle structure;
• and
• a shield comprising a first layer and a second layer and disposed between the electric machine and the engine case,
• the first layer of the shield configured to shield the electric machine from heat energy generated by the engine core;
• and
• the second layer of the shield configured to shield a powerplant component mounted with the engine case from electromagnetic energy generated by the electric machine,
• the shield further comprising a sidewall and an endwall;
• the sidewall extends axially along the electric machine to the endwall;
• and
• the sidewall extends partially circumferentially about the electric machine between opposing circumferential ends of the sidewall, thereby forming a channel about the electric machine.

An assembly for an aircraft powerplant, comprising:

• a gearbox;
• an electric machine mounted to and operably coupled to the gearbox, the electric machine is configurable as at least one of
• an electric motor during a motor mode of operation;
• or
• an electric generator during a generator mode of operation;
• and
• a shield including a sidewall and an endwall, the sidewall extending partially circumferentially about the electric machine between opposing sides of an opening into the shield, the sidewall extending axially along the electric machine to the endwall, the sidewall and the endwall forming a channel in which the electric machine is disposed, and the shield constructed from at least one of non-ferrous metal or dielectric material.