A rotary electric machine in accordance with the invention includes: a case including a front-side housing and a rear-side housing; a rotor having a field winding placed in the case; a stator having an armature winding placed in the case; a power module for energizing armature current that flows in the armature winding; a heat sink, on which the power module is mounted, for cooling the power module; a field circuit module for controlling field current that flows in the field winding; and a control circuit for controlling the operation of the power module and the field circuit module, wherein the power module includes a pair of power modules mounted opposite to each other on a base surface of the heat sink, and the heat sink includes a plurality of cooling fins placed thereon.

An electric power generating system (EPGS) may comprise a permanent magnet generator (PMG) comprising a rotor comprising a permanent magnet, and a stator comprising a plurality of armature windings configured to output a plurality of three-phase voltages, and a plurality of rectifiers corresponding to the plurality of armature windings and configured to rectify the plurality of three-phase voltages, wherein the plurality of rectifiers are connected in series.

In the vehicular AC power generator of the present invention, a part where the blade pitch is narrow and a part where the blade pitch is wide are provided in the circumferential direction on a fan fixed in an annular shape to a pole core. In the narrow-pitch part, two or more blade portions are provided in contact with each of the end surfaces of the two or more adjacent claw magnetic poles. This configuration can suppress deformation of the blade portions caused by rotation and can suppress increase in noise occurring from the fan.

A rotor portion of a synchronous machine includes a rotor. The rotor carries a field winding and a re-chargeable power storage device. The re-chargeable power storage device is electrically connected to the field winding to provide electrical power to the field winding while in generate or motor mode, and to provide electrical power to the re-chargeable power storage device while in a charge mode.

A cover covering a rectifying device includes a cover end wall portion, a cover outer wall portion, and a cover intermediate portion interposed between the cover end wall portion and the cover outer wall portion. The cover end wall portion includes an inner peripheral side intake portion, and the cover intermediate portion includes an outer peripheral side intake portion. The outer peripheral side intake portion includes an axial direction covering portion existing in a position that is closer to a rotary electric machine main body than the cover end wall portion in an axial direction, and a radial direction covering portion that connects the axial direction covering portion to an outer peripheral portion of the cover end wall portion. Intake holes are provided respectively in the inner peripheral side intake portion, the axial direction covering portion, and the radial direction covering portion.

A method for detecting an imminent pole slip of a synchronous generator electrically connected to a power supply network, whereby a signal characteristic of a power fault is detected and an imminent pole slip is determined via a predefinable value when a load angle of the synchronous generator increases, whereby the following steps are performed. Determination of a first load angle during operation without a power fault, determination of a generator frequency as a function of time when a power fault occurs, and precalculation of a second value of a load angle resulting from the power fault by adding the first value of the load angle to a load angle difference occurring during the power fault, whereby this load angle difference is caused by a deviation of a generator frequency relative to a power frequency.

A method for detecting an imminent pole slip of a synchronous generator electrically connected to a power supply network, whereby a signal characteristic of a power fault is detected and an imminent pole slip is determined via a predefinable value when a load angle of the synchronous generator increases, whereby the following steps are performed. Determination of a first load angle during operation without a power fault, determination of a generator frequency as a function of time when a power fault occurs, and precalculation of a second value of a load angle resulting from the power fault by adding the first value of the load angle to a load angle difference occurring during the power fault, whereby this load angle difference is caused by a deviation of a generator frequency relative to a power frequency.

An axial flux switched reluctance motor and/or generator, and controls are provided. It includes a stator, which includes a front surface and a rear surface, and sidewalls that extend from the front surface to the rear surface. The stator includes salient stator poles positioned on the front surface. Each one of the salient stator poles including: a bobbin protruding out from the front surface in a direction along an axis of the bobbin that is perpendicular to the front surface; the bobbin comprising a bobbin front surface that is substantially parallel to the front surface of the stator; and a coil of electrically insulated wire wound around the bobbin. A rotor includes a front rotor surface and an opposite facing rear rotor surface; and further includes a plurality of rotor poles. The rotor is affixed to a shaft and rotates about an axis of rotation that is aligned with the shaft.

An axial flux switched reluctance motor and/or generator, and controls are provided. It includes a stator, which includes a front surface and a rear surface, and sidewalls that extend from the front surface to the rear surface. The stator includes salient stator poles positioned on the front surface. Each one of the salient stator poles including: a bobbin protruding out from the front surface in a direction along an axis of the bobbin that is perpendicular to the front surface; the bobbin comprising a bobbin front surface that is substantially parallel to the front surface of the stator; and a coil of electrically insulated wire wound around the bobbin. A rotor includes a front rotor surface and an opposite facing rear rotor surface; and further includes a plurality of rotor poles. The rotor is affixed to a shaft and rotates about an axis of rotation that is aligned with the shaft.

An auxiliary winding for use in an engine-driven generator system is disclosed. The auxiliary winding is separate from but resides with the main winding in the stator slots of an alternator in the generator system. The auxiliary winding is configured to utilize the fundamental component of the flux in the airgap of the alternator along with selected spatial harmonic components to provide power to an automatic voltage regulator during all operating conditions.