A vehicle seat comprises a seat bottom having a bottom cushion and a seat back coupled to the seat bottom with the seat back having a back cushion. At least one of the bottom cushion and the back cushion defines a passage. The vehicle seat further comprises a blower assembly coupled to one of the seat bottom and the seat back. The blower assembly comprises a housing and a stator, which is coupled to the housing and comprises a plurality of driving coils. The blower assembly further comprises a rotor rotatably coupled to the housing about a rotational axis, with the rotor comprising a plurality of permanent magnets arranged to generate a flux concentrated on the driving coils. The blower assembly further comprises an impeller coupled to the rotor to rotate about the rotational axis to generate a flow of air through the passage.

A motor vehicle lock having a positioning element, especially a control shaft, and a drive unit for moving the positioning element, wherein the drive unit has a rotor and a stator, the stator having a coil arrangement and at least two magnetically conducting poles associated with the coil arrangement for conducting the magnetic field created by the coil arrangement. It is proposed that the poles each time form, with the rotor, an axial air gap relative to the geometrical rotor axis, possibly in dependence on the rotor position, and a first segment of the coil arrangement with at least two coils and a second segment of the coil arrangement with at least two coils are arranged along the geometrical rotor axis on opposite sides of the rotor.

An arrangement has at least one electrical winding having a one-part or multi-part component produced from a soft-magnetic powder composite material, which component conducts an electromagnetic flow of the winding, at least in certain regions, and has a recess provided in the region of this flow conduction, and having a one-part or multi-part, particularly metallic connector part, which has a greater mechanical strength and/or electrical conductivity and/or thermal conductivity as compared to the component, and projects into the recess of the component. In order to achieve particular thermal, mechanical and/or electrical properties, the recess penetrates the component in the region of its flow conduction, and the connector part that projects through this recess forms a mechanical, electrical and/or thermal bridge that bridges the component.

Methods, controllers and electric machine systems are described for multi-phase control of electric machines (e.g., electric motors and generators).

An axial field rotary energy device has a PCB stator panel assembly between rotors with an axis of rotation. Each rotor has a magnet. The PCB stator panel assembly includes PCB panels. Each PCB panel can have layers, and each layer can have conductive coils. The PCB stator panel assembly can have a thermally conductive layer that extends from an inner diameter portion to an outer diameter portion thereof.

A motor stator locating method for locating a motor stator structure on a circuit board is disclosed. The motor stator structure includes a base and a contact pad set. The base is provided at a central portion thereof with a raised portion, which is wound around by a coil having a plurality of turns. The contact pad set is correspondingly attached to one side of the base opposite to the raised portion, and has a first and a second contact pad. The coil has two ends respectively connected to the first and the second contact pad. With these arrangements, the motor stator structure can be manufactured at largely improved production efficiency and reduced error rate.

The disclosure relates to printed circuit board motors and specifically to printed circuit boards used in motors and generators. Windings formed from copper on printed circuit boards have been used for purposes of forming antennas, inductors, transformers, and stators that can be incorporated in permanent magnet brushless DC (permanent magnet synchronous) machines. For energy conversion devices using modern permanent magnet materials and PCB stators, the magnetic field is not strongly confined by magnetically susceptible materials. Thus, the interaction between fields from adjacent turns in a winding, and/or windings on adjacent layers (for a multilayer configuration) may be significant. The structures disclosed hereinafter reduce the effective resistance in the windings, and therefore reduce the associated losses to achieve a reduced current density in portions of the rotating energy conversion devices. The effect of the disclosed structures is a measurable reduction in loss mechanisms as a function increasing frequency, compared to the currently available devices. These effects are significant in frequency ranges important to energy conversion processes as well as typical control strategies, for example, pulse-width modulation.

For cooling an electric machine having stator windings, a housing including a series of interleading compartments is provided, the compartments being adapted for sealingly and removably enclosing one or more of the stator windings, so that during operation of the machine, a fluent coolant passing through the compartments and immersing the windings removes heat from the windings by thermal conduction. The disclosure has application to electric machines such as electric motors and generators, providing a modularised cooling system for the individual stator windings, allowing each one to be removed if necessary without requiring removal of the whole stator winding assembly.

The present invention relates to a DC motor that is used in overall industrial fields producing electric cars, cordless vacuum cleaners, drones, and the like, and the existing high-efficiency DC motor, in which top and bottom permanent magnets have different polarities are arranged in a state where their centers alignedly face each other and electromagnets are disposed between the top and bottom permanent magnets to utilize magnetic forces to the maximum and to produce a rotation force thereof, is suggested. However, the existing high-efficiency DC motor has the following problems. Firstly, the rotation direction is not constant according to the initial position of the rotor, and secondly, the top and bottom permanent magnets attract the magnetic materials of the electromagnets to inhibit the rotation, and to solve such problems, accordingly, a high-efficiency DC motor according to the present invention is configured to allow centers of bottom permanent magnets to be facingly disposed between top permanent magnets, thereby exhibiting excellent rotation force and torque when compared to a general BLDC motor.

A permanent-magnet synchronous motor or generator with at least one rotor (2) and at least one stator (3, 8). The motor includes two rotors (2), four stators (3, 8) and a cooling system (7, 7a). The cooling system includes three cooling circuits (7, 7a), i.e. two outer circuits (7) which are each accommodated in a longitudinal outer wall of a casing (8), adjacent to an outermost stator (3, 8), for cooling said outermost stator (3, 8), and an intermediate circuit (7a) located between the two innermost stators (3, 8) in the motor for simultaneously cooling said two stators (3, 8), the central shaft (5) being common to the two rotors (2) which are connected to the central shaft (5) by mechanical means.