Printed circuit board stator axial field rotary energy device with ferromagnetic yoke

An axial field rotary energy device, comprising:

• a housing;
• a rotor coupled to the housing and comprising an axis of rotation and a rotor disk carrying magnets on both sides of the rotor disk, and all of the magnets are co-planar with or parallel to each other;
• two stators coaxial with the rotor and facing the rotor, each stator comprising a printed circuit board (PCB) having conductive layers laminated together with layers of an insulating material, each conductive layer comprises coils that are configured to carry electrical current when connected to an external voltage source;
• the rotor is located axially between the two stators;
• two ferromagnetic yokes coaxial with the rotor and the stators, the ferromagnetic yokes are mechanically and thermally coupled to the stators, respectively, and the housing to provide a path for magnetic flux produced by the magnets and a path to conduct heat generated by the stators from the stators to the housing;
• and
• an exterior of each stator is directly mechanically coupled to an interior of the housing on both inner and outer diameter sides of a respective ferromagnetic yoke.

An axial field rotary energy device, comprising:

• a housing;
• a rotor coupled to the housing, the rotor comprising an axis of rotation and a rotor disk that comprises a circular core that is non-magnetic and sandwiched between circular plates that are non-magnetic, wherein the circular core and circular plates comprise a circumferential channel that carries magnets, and the rotor disk, the circular plates and the magnets have substantially the same outer diameter, and a retaining ring that is nonmagnetic and retains the magnets in the circumferential channel, wherein adjacent ones of the magnets engage each other and, collectively, the magnets form an arch structure contained by the retaining ring;
• two stators coaxial with the rotor and facing the rotor, each stator comprising a printed circuit board (PCB) having a plurality of conductive layers laminated together with layers of an insulating material, each conductive layer comprises coils that are configured to carry electrical current when connected to an external voltage source, and the stators are mechanically coupled to the housing, so the stators are configured to react to torque produced by the device;
• the rotor is located axially between the two stators;
• two ferromagnetic yokes coaxial with the rotor and the stators, the ferromagnetic yokes are mechanically and thermally coupled to the stators, respectively, and the housing to provide a path for magnetic flux produced by the magnets and a path to conduct heat generated by the stators from the stators to the housing;
• and
• an exterior of each stator is directly mechanically coupled to an interior of the housing on both inner and outer diameter sides of a respective one of the ferromagnetic yokes.