A charging system is provided. The charging system includes an inverter, a wound rotor synchronous motor that has at least one stator coil supplied with power converted by the inverter and a rotor having a plurality of field coils, and a switching circuit unit that is configured to selectively supply power to the plurality of field coils. Additionally, a controller is configured to operate the switching circuit unit to supply power from the battery to at least one of the plurality of field coils when the wound rotor synchronous motor operates as a motor and isolate the field coils from the battery and operate the switching circuit unit to supply grid power to a portion of the field coils when the wound rotor synchronous motor is charging when the wound rotor synchronous motor supplies the grid power to the field coil side to charge the battery.

A charging system is provided. The charging system includes an inverter, a wound rotor synchronous motor that has at least one stator coil supplied with power converted by the inverter and a rotor having a plurality of field coils, and a switching circuit unit that is configured to selectively supply power to the plurality of field coils. Additionally, a controller is configured to operate the switching circuit unit to supply power from the battery to at least one of the plurality of field coils when the wound rotor synchronous motor operates as a motor and isolate the field coils from the battery and operate the switching circuit unit to supply grid power to a portion of the field coils when the wound rotor synchronous motor is charging when the wound rotor synchronous motor supplies the grid power to the field coil side to charge the battery.

To provide an AC generator equipped with a voltage regulation device capable of cost reduction in terms of both of manufacture and device, a voltage regulation device for the AC generator, and a method for manufacturing the same. In an AC generator equipped with a voltage regulation device 16 for regulating the magnitude of output voltage, the voltage regulation device 16 is composed of: a molded body 15 having a plurality of insert conductors; and a circuit component 14 mounted on the molded body 15 and electrically connected to the insert conductors, and in the voltage regulation device 16, an extended-portion-for-jumper 19ae is integrally provided in a part of the insert conductor 19a.

A rotary electric machine integrated with a control device includes: a housing composed of a front bracket and a rear bracket and supporting a rotor and a stator; and a control device attached to the rear bracket. The control device is composed of: a power module having a switching element that is for energizing a stator winding of the stator; a field module having a switching element that is for energizing a field winding of the rotor; a heat sink cooling the power module and the field module; and a control board having a control circuit that controls the switching elements, the control device also including: a battery end terminal; and a grounding end terminal. Then, the heat sink is attached to the rear bracket while being insulated therefrom.

An externally excited electric synchronous machine may include a machine rotor, a machine stator, and a signal transmission device for contactless transmission of an operating signal corresponding to a DC voltage to the machine stator. The machine rotor may include a rotor shaft and a machine rotor coil. The machine rotor coil may be supplied with DC voltage and may provide a magnetic rotor field. The machine stator may include a machine stator coil that is fixed relative to the machine stator. The machine stator coil may provide a magnetic stator field, which may interact with the magnetic rotor field such that the machine rotor rotates. The signal transmission device may include (i) on the machine rotor, a signal coil connected in series with the machine rotor coil and (ii) on the machine stator, a magnetic field sensor that detects a magnetic field provided via the signal coil.

An externally excited electric synchronous machine may include a machine rotor, a machine stator, and a signal transmission device for contactless transmission of an operating signal corresponding to a DC voltage to the machine stator. The machine rotor may include a rotor shaft and a machine rotor coil. The machine rotor coil may be supplied with DC voltage and may provide a magnetic rotor field. The machine stator may include a machine stator coil that is fixed relative to the machine stator. The machine stator coil may provide a magnetic stator field, which may interact with the magnetic rotor field such that the machine rotor rotates. The signal transmission device may include (i) on the machine rotor, a signal coil connected in series with the machine rotor coil and (ii) on the machine stator, a magnetic field sensor that detects a magnetic field provided via the signal coil.

An inductively electrically excited synchronous machine is disclosed. The synchronous machine includes a rotor including at least one rotor coil for generating a magnetic rotor field, a stator, on which the rotor is rotatably mounted about an axis of rotation, and including at least one stator coil for generating a magnetic stator field, and a rotary transformer for inductively transmitting electrical energy to the at least one rotor coil. The rotary transforming includes at least one stator-fixed transformer primary coil and at least one rotor-fixed transformer secondary coil. A machine controller is coupled to the stator coil and to the at transformer primary coil for operation as a motor and/or as a generator. A demagnetizing circuit is provided that includes at least one dynamo winding arranged on the stator. The demagnetizing circuit has at least one switching device for activating and deactivating the demagnetizing circuit.

An inductively electrically excited synchronous machine is disclosed. The synchronous machine includes a rotor including at least one rotor coil for generating a magnetic rotor field, a stator, on which the rotor is rotatably mounted about an axis of rotation, and including at least one stator coil for generating a magnetic stator field, and a rotary transformer for inductively transmitting electrical energy to the at least one rotor coil. The rotary transforming includes at least one stator-fixed transformer primary coil and at least one rotor-fixed transformer secondary coil. A machine controller is coupled to the stator coil and to the at transformer primary coil for operation as a motor and/or as a generator. A demagnetizing circuit is provided that includes at least one dynamo winding arranged on the stator. The demagnetizing circuit has at least one switching device for activating and deactivating the demagnetizing circuit.

This invention is concerning a rectifying device in an AC power generator, the rectifying device including a broken-ring-shaped heat sink supporting a rectifying element and cooling the rectifying element and a circuit board holding the heat sink. The circuit board includes an engaging projection. The heat sink includes a hole, into which the engaging projection is fit, and a gravity center adjustment portion.

An assembly for a direct current (DC) synchronous machine, according to an exemplary aspect of the present disclosure includes, among other things, a stationary portion including a direct current (DC) armature winding and a rotating portion including alternating current (AC) field winding configured to supply DC output to the DC armature winding. A rotating inverter is configured to selectively communicate current to the AC field winding such that a frequency of the current is adjusted to approach synchronization with a position of the rotating portion. A method for generating DC output from a DC synchronous machine is also disclosed.