A motor includes a stator that includes a stator core around which a stator winding is wound; magnets; a rotating body; a shaft; a rotor; a first bearing; a second bearing; a first metal bracket that fixes the first bearing; and a second metal bracket that fixes the second bearing. The stator core, the first metal bracket, and the second metal bracket are electrically connected, and when a connection point between the stator core and the first metal bracket or the second metal bracket is defined as a connection point A of a bearing outer ring, a capacitive member having a capacitance C.sub.n is located between a portion having the same potential as the connection point A and a portion having a zero reference potential of a drive circuit that applies a voltage to the stator core.

A permanent magnet carrier, which could be a rotor or stator of an electric machine, includes a first non-magnetic ring and a second non-magnetic ring. Between the rings are soft magnetic pole elements. The soft magnetic pole elements each connect to the first and second non-magnetic rings and the soft magnetic pole elements are separated from each other by the first and second non-magnetic rings. Permanent magnets are disposed between the soft magnetic pole elements.

Various implementations include a six-phase electric motor including an annular stator and a rotor. The stator defines an opening having an inner surface. First and second three-phase sets of concentrated windings are circumferentially spaced along the inner surface of the opening. The first and second sets of concentrated windings are circumferentially offset from each other. The stator defines voids located radially outwardly from, and circumferentially between, each of the windings. The rotor includes permanent magnets circumferentially spaced around the rotor axis. The outer circumferential surface of the rotor defines grooves located circumferentially between each of the permanent magnets. The rotor is disposed within the stator opening such that the stator and rotor are coincident with each other. Flux from the permanent magnets interacts with a stator magnetic field created by a current flowing through the first and second sets of concentrated windings to cause the rotor to rotate.

The present disclosure provides a motor rotor and a permanent magnet motor. The motor rotor includes a rotor body. In a section perpendicular to a central axis of the rotor body, a first slot side has a first and a second endpoint, and a second slot side has a third and a fourth endpoint. A distance from a connecting line between the first endpoint and the third endpoint to a center of the rotor body is denoted by h1, a radius of the rotor body is denoted by R, and h1 and R satisfy 0.96≤h1/R≤0.99. A connecting line between the first endpoint and the center of the rotor body is a first connecting line, a connecting line between the third endpoint and the center of the rotor body is a second connecting line, and an included angle between the two connecting lines is denoted Φ and satisfies: 3.7°≤Φ≤5.6°.

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 rotor and a motor including the same. The motor includes a stator and a rotor configured to rotate by interacting with the stator. The rotor includes a plurality of permanent magnets disposed in a circumferential direction of the rotor and rotor cores disposed between the plurality of permanent magnets. The rotor core includes a notch cut inward from a circumferential surface thereof, and the notch is formed in an asymmetric shape. The rotor core has a notch formed on one side of the circumferential surface and the rotor core has a shape inverted left and right with the rotor core are alternately stacked, so that a magnitude of a synthetic cogging torque generated in the rotor is reduced.

A rotor includes magnets and a core including arcuately arranged pole segments. Each pole segment includes first and second prongs that extend away from the rotor axis and are at least in part arcuately spaced apart to define a cutout therebetween. Each pair of arcuately adjacent pole segments defines therebetween a respective magnet-receiving slot, with the first prong of one of the pole segments and the second prong of the other of the pole segments defining the slot. The magnets are received in slots, such that each of the magnets is at least in part interposed between one of the pairs of adjacent pole segments. The magnets and the pole segments are dimensioned and configured so that at least one of the first and second prongs is deflected by the magnet received in the respective slot, such that the prongs cooperatively apply a clamping force on the magnet.

According to one aspect of the present disclosure, a rotor includes a plurality of permanent magnets and a support supporting the permanent magnet. The support includes at least one of an outside support fixed to a radial outside of the outer cores to circumferentially support an end face of the permanent magnet from both sides and an inside support fixed to a radial inside of the outer cores to circumferentially support the end face of the permanent magnet from both sides. Each of the outer cores includes an opposite face parallelly opposed to the end face of the permanent magnet in the circumferential direction. The outside support and the inside support each includes a support face circumferentially supporting the end face. The support face is disposed on a side closer to a center line of the permanent magnet than the opposite face in the circumferential direction.

A rotor for an electric machine may include a stack of ferrous laminations and a rotor core. The stack may be divided into a plurality of segments in a circumferential direction. At least one permanent magnet may be arranged between two adjacent segments of the plurality of segments. Each of the plurality of segments may have an opening extending in a radial direction outwards from a radially inner surface. The rotor core may connect the two adjacent segments. The rotor core may be formed via casting a non-ferrous material in a space disposed radially inwards of the plurality of segments and into the radially outwards extending opening of each of the plurality of segments. The opening of each of the plurality of segments may have a generally fir-tree shaped section profile.

A motor and a spoke-type rotor structure thereof are disclosed. The rotor structure comprises a rotor core which has a plurality of spoke-type first magnetic members. Two oblique second magnetic members arranged in a V shape are provided between every adjacent two of the first magnetic members. A radius of the rotor core is R. A length of the first magnetic member is ls. A length of the second magnetic member is lv. A length component of the second magnetic member on the radius of the rotor core is x. An included angle between the first magnetic member and the second magnetic member is β. An included angle between every adjacent two of the first magnetic members is α. The parameters satisfy:
ls+x<R, wherein x=lv.Math.cos(180°−β);
90°+α/2<β<180°.