Shaft for an electric machine, includes a core seat for a laminated core and two shaft ends extending axially outwardly from the core seat in opposite directions, wherein the core seat has at least one core seat portion extending in the axial direction with a polygonal profile for forming a polygonal connection to the laminated core.

A rotor assembly for an electric motor includes a rotor core and a plurality of magnets. The rotor core defines a rotation axis. Each of the magnets includes a magnet stem portion and a magnet arm portion. The magnet stem portion extends radially relative to the rotational axis to present a radially outermost stem end. The magnet arm portion is located at least in part radially outward from the stem end. In addition, the magnet arm portion extends circumferentially in opposite directions relative to the magnet stem portion.

A transverse flux motor is formed by a stator portion and a rotor portion. The stator portion includes one or more phase assemblies formed by flux ring plates axially bracketing coil wire windings. The flux rings include teeth that magnetically interact with circumferentially opposed and adjacent teeth to form flux paths transverse to the axis of rotation of the rotor assembly.

A motor includes a rotor with a rotor core formed of stacked electromagnetic steel sheets and rotor magnets, and a stator surrounding the rotor. The rotor core includes pairs of magnet insertion hole portions with an opposing distance sequentially increasing radially outwardly. The rotor magnets are in the magnet insertion hole portions. The rotor core includes first blocks arranged by dividing the rotor core into two blocks in the axial direction, and a second block between the two first blocks. An angle formed by the rotor magnets in the pair of magnet insertion hole portions in the first block is a first magnet opening angle θ1. An angle formed by the rotor magnets in the pair of magnet insertion hole portions in the second block is a second magnet opening angle θ2. The second magnet opening angle θ2 is larger than the first magnet opening angle θ1.

An electric machine may include a rotor having a notch at each pole wherein each notch is skewed by some mechanical angle. Notches may fluidly couple one end of the rotor to the other end of the rotor and provide pumping functionality for fluid therein.

Stator and method for producing a stator for an electrical machine, comprising a stator main body (34) which has radial stator teeth (14) for receiving coils (17) of an electrical winding and, on an end side of the stator main body (34), has an insulating lamination (40) with receiving pockets (46) for insulation-displacement terminal elements (70), wherein the coils (17) are wound by means of a winding wire which is inserted into the receiving pockets (46), wherein an interconnection plate (52) has annular conductors (84) on which in each case a plurality of insulation-displacement terminal elements (70) are arranged, which insulation-displacement terminal elements axially engage into the receiving pockets (46) in order to make electrical contact with the winding wire, wherein the interconnection plate (52) is manufactured from plastic and has annular grooves (59) which are open axially at the bottom and into which the annular conductors (84) are inserted.

This stator manufacturing method includes a step in which one of a skew-forming mechanism portion and a skew-forming jig presses, with the skew-forming jig, the skew-forming mechanism portion having a shape corresponding to the shape of a skew, to form a skew having a bent shape or a curved shape.

An electric motor with a rotor and a stator, where the rotor and/or the stator can comprise two or more sections, and a torque ripple caused by the magnetic field(s) associated with a section of the rotor (or stator) can at least partially counters torque ripple caused by the magnetic field(s) associated with other section(s) of the rotor (or stator).

A first layer, a second layer, and a third layer of a sleeve of a rotor are integrated side by side in this order from the radial center of the sleeve toward the outside. The first layer includes a first fiber-reinforced resin including a first carbon fiber extending in a direction inclined with respect to both the axis of the rotor shaft and a circumferential direction of the sleeve. The second layer includes a second fiber-reinforced resin including a second carbon fiber extending along the circumferential direction of the sleeve. the third layer includes a third fiber-reinforced resin including a third carbon fiber extending along the circumferential direction of the sleeve. An elastic modulus of the third layer is larger than an elastic modulus of the second layer.

The present invention may provide a motor including a shaft, a rotor coupled to the shaft, and a stator disposed to correspond to the rotor, wherein the rotor includes a rotor core, a magnet disposed on an outer surface of the rotor core, and a guide in contact with the rotor core, the guide includes a first member in contact with one side surface of the rotor core and a plurality of second members (420, 430) which extend from the first member in an axial direction and are in contact with a side surface of the magnet, and positions of one side end portions and the other side end portions of the second members are different from each other in a circumferential direction.