A electromagnetic machine system includes a rotor and a stator positioned about the rotor. A current injection mechanism is coupled with windings of the stator and structured to inject electrical currents therein so as to change a flux distribution of a magnetic field produced by the stator. The injected currents may be harmonic currents. The rotor further includes an inductor positioned to interact with the magnetic field when the flux distribution is changed, to produce an electrical excitation current for exciting windings in the rotor. The machine system may be a synchronous motor or generator, and may be brushless. Applications of the current injection strategy to direct torque control and vector control are also disclosed.

A two phase wind power generator system for producing an electrical output having twice the voltage relative to single phase systems includes a shaft connected to an external shaft rotator, a generator aspect integral with the shaft and an output aspect connected to the generator aspect. The generator aspect includes a power source, switching commutator with integrated brushes, first rotor assembly, first stator assembly, second rotor assembly, and a second stator assembly, with the switching commutator, the first rotor assembly and second rotor assembly discretely mounted to shaft, with the rotor assemblies oriented 180 degrees out of phase. The power source energizes the rotor assemblies, and when the shaft is rotated by an external force, electricity is induced in the stator assemblies. The output aspect is operative to receive electricity induced thereby and convert it to a desired form of electrical current as well as combine it for output.

The present invention concerns a synchronous generator of a gearless wind power installation, comprising a stator and a multi-part external rotor. The invention also concerns a wind power installation having such a generator. Furthermore the present invention concerns a transport arrangement for transporting a synchronous generator of a gearless wind power installation.

A synchronous machine for connection to an electrical system may include a stator configured as a portion of the synchronous machine; a rotor configured as a portion of the synchronous machine being rotatable with respect to the stator; and a control circuit to control the rotor to allow the rotor to continuously slip with respect to the stator.

A rotating electric machine comprises a field winding provided on a rotor iron core and a neutral ring supported independently of the field winding, wherein: the field winding and the neutral ring are electrically connected to each other through a connecting wire; the neutral ring is disposed spaced with respect to the rotor iron core; and the connecting wire absorbs the stress difference between the field winding and the neutral ring when a centrifugal stress is applied.

A rotating electric machine comprises a field winding provided on a rotor iron core and a neutral ring supported independently of the field winding, wherein: the field winding and the neutral ring are electrically connected to each other through a connecting wire; the neutral ring is disposed spaced with respect to the rotor iron core; and the connecting wire absorbs the stress difference between the field winding and the neutral ring when a centrifugal stress is applied.

The present invention relates to a flux-switching machine, including a stator having phase windings and field coils, wherein, in the machine, at least one field coil is arranged in a pair of notches separated by at least three teeth.

The present invention relates to a flux-switching machine, including a stator having phase windings and field coils, wherein, in the machine, at least one field coil is arranged in a pair of notches separated by at least three teeth.

The present invention relates to a non-rotating direct current electric generator capable of generating a direct current with high efficiency without rotating a field magnet or an armature. The non-rotating direct current electric generator according to the present invention is a direct current electric generator generating a direct current, and is characterized by comprising a drive unit and a generator unit, wherein the generator unit comprises: a rod-shaped core member; a field magnet having a first hollow part in the center part along with the winding of an electric line, and disposed on the outside of the core member through the first hollow part; and an armature having a second hollow part in the center part along with the winding of an electric line, and disposed on the outside of the core member through the first hollow part, wherein a pole piece is provided between the field magnet and the armature, an insulating plate is disposed between the field magnet and the pole piece and between the armature and the pole piece, and the drive unit supplies a field current to the generator unit on the basis of an alternating current from an alternating current power source.

The present invention relates to a non-rotating direct current electric generator capable of generating a direct current with high efficiency without rotating a field magnet or an armature. The non-rotating direct current electric generator according to the present invention is a direct current electric generator generating a direct current, and is characterized by comprising a drive unit and a generator unit, wherein the generator unit comprises: a rod-shaped core member; a field magnet having a first hollow part in the center part along with the winding of an electric line, and disposed on the outside of the core member through the first hollow part; and an armature having a second hollow part in the center part along with the winding of an electric line, and disposed on the outside of the core member through the first hollow part, wherein a pole piece is provided between the field magnet and the armature, an insulating plate is disposed between the field magnet and the pole piece and between the armature and the pole piece, and the drive unit supplies a field current to the generator unit on the basis of an alternating current from an alternating current power source.