Abstract: A starter-motor, and alternator-generator apparatus for an internal combustion or gas turbine engine wherein the major electro-magnetic circuit of the apparatus is utilized for both the starting and generating functions is disclosed. The rotor may have two windings on it, a main rotor winding that acts as both a starter armature winding and an alternator field winding, and a small exciter armature winding. For slip ring machines the exciter is eliminated. The main rotor winding is wound in progressive simplex lap. The exiter armature or slip rings are connected to this winding at the equalizer connections through a rectifier and automatically activated switch circuit. During starter-motor operation, the main rotor winding is connected in series with its starter field winding through a commutator in a conventional series connected DC machine, and the exciter-armature winding or slip rings are disconnected from the main rotor winding.

Abstract: An internal combustion engine starting circuit for a system including a combination direct current motor generator unit having an armature coil and field coil in series therewith to be connected to a source of direct current to function as a starter motor when the ignition switch is first closed and to function as a generator when the internal combustion engine starts to bring the motor generator unit to generating speed is provided with a starting solenoid to be energized to close a contact for connecting the motor generator unit to the source when energized. An ignition switch is adapted to be closed to complete a circuit through one coil of a double coil starting relay having a normally open contact to be closed to energize the starter solenoid in series with the ignition switch and the source.

Abstract: Method and apparatus for accelerating a large inertia load from rest to a predetermined speed of rotation by means of a synchronous dynamoelectric machine. A synchronous dynamoelectric machine, such as a turbine generator, which is mechanically coupled to a gas turbine prime mover, is started synchronously to bring the gas turbine up to a speed which exceeds its stall speed under load. The rotor field winding of the synchronous dynamoelectric machine is connected to receive direct current excitation from a rotatable rectifier assembly of a brushless exciter. During starting, a quadrature axis winding disposed around the stator of the brushless exciter is energized by single phase alternating current. Alternating current excitation is induced by transformer action within the rotor armature winding of the exciter and is applied to the rotor field winding after being rectified by the rotatable rectifier assembly.

Abstract: A power system comprising a generator mounted on the propulsion unit of an outboard motor through an interposed adaptor which exposes the drive connection between the generator and propulsion unit to allow access thereto for employment of the drive mechanism for the driving of accessories other than the outboard motor. Clutch means selectively couple the drive means of the generator and the driven means of the propulsion unit for a selective operation of the mounted generator independently of the propulsion unit.

Abstract: The instant invention describes an improvement in a starter-generator arrangement in which a dynamoelectric machine is driven as a brushless DC motor to start a dynamic load such as a jet engine and as a cynchronous constant frequency generator after the jet engine is ignited and brought up to speed. A plurality of cycloconverters utilizing phase controlled rectifier banks are operated from a constant frequency supply source to supply current to the armature windings of the machine in the starting mode. Position sensing elements such as Hall generators sense the rotor position relative to the machine windings and generate enabling signals to control conduction of the phase controlled rectifiers to supply current to the proper armature windings so that the machine functions essentially as a DC brushless motor to drive a dynamic load such as a jet engine.