A stator core includes plate-shaped core members laminated to define the stator core. Each core member includes an annular core back portion, and tooth portions that project radially inward from an inner circumferential surface of the core back portion. The core back portion includes at least one recessed portion recessed radially inward from an outer circumferential surface of the core back portion, and at least one welded portion arranged at a corresponding one of the at least one recessed portion to join axially adjacent ones of the core members. The at least one recessed portion is recessed in a radial direction is in a range of about 0.2 mm to about 1.5 mm, both inclusive.

In an installation structure of a magnet plate for installing a magnet plate for a linear motor to a machine mounting part via a joining member, the magnet plate includes a first face, a second face, a first female threaded part at the second face, and an opening at the first face; the machine mounting part includes a second female threaded part having a winding direction opposite to the first female threaded part on a side opposing the magnet plate; the joining member includes a first male threaded part and a second male threaded part; and the magnet plate is installed to the machine mounting part with the first female threaded part being screwed with the first male threaded part, and with the second female threaded part of the machine mounting part being screwed with the second male threaded part.

In an installation structure of a magnet plate for installing a magnet plate for a linear motor to a machine mounting part via a joining member, the magnet plate includes a first face, a second face, a first female threaded part at the second face, and an opening at the first face; the machine mounting part includes a second female threaded part having a winding direction opposite to the first female threaded part on a side opposing the magnet plate; the joining member includes a first male threaded part and a second male threaded part; and the magnet plate is installed to the machine mounting part with the first female threaded part being screwed with the first male threaded part, and with the second female threaded part of the machine mounting part being screwed with the second male threaded part.

A polarity-switching magnetic diode provides a method of gating or rectifying N and S polarized flux contained within the closed-loop flux circuit of a magnetic flux element. Gaps separate the opposing magnetic polarities, and strategically placed control coils are disposed to break the magnetic circuit in at least two places upon electrical activation of the deviceforming high density flux zones of opposite polarity. Switching the control coil's magnetic flux flow allows for the high density flux zones to alternate N and S polarity.

The present disclosure relates to a motor, in particular a compact, lightweight and high torque motor. The rotor comprises a Halbach array magnet structure in which the projected magnetic field is directed toward the rotation axis of the motor and the stator comprises a plurality of poles within the Halbach array. The individual magnets making up the Halbach array have a thickness in the radial direction, with respect to the rotation axis, which is determined to be the minimum thickness required to stop demagnetisation of the magnets when the maximum current to generate peak torque output of the motor is driven through the stator at the maximum expected temperature at which the motor will be used.

A method is presented for producing an arrangement of coil elements for a plug-in coil of an electric machine. The method includes providing a workpiece carrier and producing an arrangement of rod-shaped coil elements for a plug-in coil of an electric machine on the workpiece carrier, wherein the following is respectively provided for the rod-shaped coil elements: accommodating and holding the coil elements by means of a displacement device; supplying the coil element onto the workpiece carrier by means of the displacement device into an assigned proximal position on the workpiece carrier, wherein the coil elements are hereby displaced form a distal position into the assigned proximal position with respect to the workpiece carrier; and transferring the coil elements in the proximal position on the workpiece carrier from the displacement device by a gripping device, which is formed on the workpiece carrier.

A method is presented for producing an arrangement of coil elements for a plug-in coil of an electric machine. The method includes providing a workpiece carrier and producing an arrangement of rod-shaped coil elements for a plug-in coil of an electric machine on the workpiece carrier, wherein the following is respectively provided for the rod-shaped coil elements: accommodating and holding the coil elements by means of a displacement device; supplying the coil element onto the workpiece carrier by means of the displacement device into an assigned proximal position on the workpiece carrier, wherein the coil elements are hereby displaced form a distal position into the assigned proximal position with respect to the workpiece carrier; and transferring the coil elements in the proximal position on the workpiece carrier from the displacement device by a gripping device, which is formed on the workpiece carrier.

A starter includes a three-phase switched reluctance electric motor including a rotor and a stator, a pinion gear, a power inverter that is connected to the stator, and a rotational position sensor. The rotor includes a quantity of rotor poles that is between 6 and 16, and the stator includes a quantity of stator poles that is between 8 and 24. An outer diameter of the electric motor is less than 85 mm. An active length of the motor is less than 50 mm. An airgap distance between the rotor and the stator is between 0.1 mm and 0.5 mm. A ratio between a rotor pole arc and a stator pole arc is at least 1.0:1. A ratio between a stator diameter and a rotor diameter is at least 2.0:1, and a ratio between a stator pole height and a rotor pole height is at least 2.5:1.

A starter includes a three-phase switched reluctance electric motor including a rotor and a stator, a pinion gear, a power inverter that is connected to the stator, and a rotational position sensor. The rotor includes a quantity of rotor poles that is between 6 and 16, and the stator includes a quantity of stator poles that is between 8 and 24. An outer diameter of the electric motor is less than 85 mm. An active length of the motor is less than 50 mm. An airgap distance between the rotor and the stator is between 0.1 mm and 0.5 mm. A ratio between a rotor pole arc and a stator pole arc is at least 1.0:1. A ratio between a stator diameter and a rotor diameter is at least 2.0:1, and a ratio between a stator pole height and a rotor pole height is at least 2.5:1.

An electromagnetic armature comprising an electromagnetic yoke having a cylindrical surface of axis z, intended to be facing an air-gap. Said cylindrical surface is the interaction surface and comprises a plurality of teeth forming poles, associated with the interaction surface and projecting from same, and disposed at regularly spaced intervals around the whole yoke. Each tooth comprises a recess arranged on one of the faces of the tooth in a so-called polar plane. Each recess is intended to receive the winding. Said teeth are disposed on the yoke in such a way that the recesses are disposed alternately to either side of the polar plane. Alternatively, one or more teeth of the armature can be removed from the yoke.