Abstract: Aircraft and aircraft electric motors include a rotor assembly comprising a plurality of magnets arranged on a magnet support, an output shaft operably coupled to the rotor assembly, and a stator comprising a support structure and at least one winding wrapped about a plurality of stator teeth, the stator configured to generate an electromagnetic field to cause rotation of the rotor assembly. The magnets are configured in sets arranged circumferentially about the rotor assembly, with each set having a cut-out notch at opposite ends of each set in the circumferential direction and wherein the cut-out notch is at least partially formed in an in-pole magnetization magnet having a radial orientation magnetization.

Abstract: A multi-three-phase motor drive system includes a power distribution network, a motor drive unit, and a motor network. The power distribution network includes a partitioned direct current (DC) link connected between a positive voltage rail and a negative voltage rail. A connection between the positive voltage rail and a mid-point node defines an upper portion of the partitioned DC link and a connection between negative voltage rail and the mid-point node defines a lower portion of the partitioned DC link. The motor drive unit includes a plurality of inverter units, and the motor network includes a plurality of motor windings which are each connected to a respective inverter unit. A first group of the inverter units is connected in parallel with the upper portion of the portioned DC link, and a second group of the inverter units is connected in parallel with the lower portion of the partitioned DC link.

Abstract: Aircraft electric motors include a rotor having magnet segments arranged on a frame of the rotor, the rotor defining an internal cavity radially inward from the magnet segments. An output shaft is operably coupled to the rotor and a stator, having a yoke and at least one winding wrapped about stator teeth, is arranged within the internal cavity of the rotor. The stator defines a radial span as a distance from the yoke to a radial outward edge of the at least one winding. The plurality of stator teeth have at least one tooth formed from a magnetic material with the tooth having an engagement end configured to engaged with the yoke, a distal end opposite the engagement end, and a shaped end at the distal end of the tooth, with a portion of the tooth at the shaped end being closer to the yoke than the radial span.

Abstract: Aircraft electric motors include a rotor comprising a plurality of magnet segments arranged on a frame of the rotor, the rotor defining an internal cavity radially inward from the plurality of magnet segments, an output shaft operably coupled to the rotor, a stator comprising at least one winding wrapped about a support structure, the stator arranged within the internal cavity of the rotor, and a stator support configured to supply at least a current into the at least one winding, wherein the support structure is structurally supported on the stator support. The magnet segments are symmetrically arranged about the stator to balance axial forces applied to the rotor when a current is induced within the at least one winding and maintain a gap between the plurality of magnet segments and the at least one winding.

Abstract: A transformer bobbin includes a first bobbin member including a first end defining a first opening, a second end defining a second opening, an inner surface defining the first opening and an outer surface. The inner surface includes a first plurality of fins that extend between the first end and the second end. A second bobbin member is disposed about and spaced from the first bobbin member. The second bobbin member includes a first end portion defining a first opening portion, a second end portion, an inner surface portion and an outer surface portion. One of the outer surface of the first bobbin member and the outer surface portion of the second bobbin member includes a second plurality of fins that extend between the first end portion and the second end portion.

Abstract: A magnetic bearing (20) comprises: a rotor (22) to be supported for rotation about an axis (502); a stator (24) extending from a first end (30) to a second end (32) and comprising: one or more first permanent magnets (110); one or more second permanent magnets (112) of polarity substantially opposite to a polarity of the one or more first permanent magnets; at least three radial windings (40,42,44,46); a first axial winding (34); a second axial winding (36); a first end pole (120); and a second end pole (122).

Abstract: An illustrative example machine includes a rotatable body and a plurality of magnetic poles supported by the rotatable body. Each of the plurality of magnet poles comprises a plurality of magnet segments. A first magnet segment of each of the magnet poles has a first magnetic characteristic that affects a magnetic flux associated with the respective magnet pole in a first way. A second magnet segment of each magnet pole has a second magnetic characteristic that affects the magnetic flux associated with the respective magnet pole in a second way. The first magnetic characteristic is different than the second magnetic characteristic and the first way in which the different magnet segments affect the magnetic flux is different than the second way.

Abstract: A magnetic bearing (20) comprises: a rotor (22) to be supported for rotation about an axis (502); a stator (24) extending from a first end (30) to a second end (32) and comprising: one or more first permanent magnets (110); one or more second permanent magnets (112) of polarity substantially opposite to a polarity of the one or more first permanent magnets; at least three radial windings (40, 42, 44, 46); a first axial winding (34); a second axial winding (36); a first end pole (120); and a second end pole (122).