Abstract: A primary and at least one backup alternating voltage source are coupled to a common load to provide interrupt free electric current to the load through a simplified interconnecting network. Phase control of all but one of the sources is accomplished by monitoring the phase difference across choke coils coupling the sources to the load.
Abstract: A rotary converter machine which includes a stator with three-phase primary, and secondary windings, and a rotor mounted within the stator which includes a damping winding. The primary and secondary stator windings are arranged on a common stator pack and located in continuous stator slots, both windings extending over the whole axial length of the common stator pack. The converter machine provides a direct transfer of the electrical energy by flux linkage between the two windings. The rotor is driven by the rotating magnetic field either asynchronously, if a drum rotor is provided, or synchronously, if a salient-pole rotor is provided.
Abstract: A system for conveniently and safely accessing and utilizing the electrical system of a vehicle to provide suitable electrical power output for emergency use with conventional appliances and lighting fixtures, by electrifying the existing parallel distribution wiring system of a home or otherwise. Said system may further access and utilize the electrical system of a vehicle to provide suitable electric power for remote or mobile use, and is amenable to automotive, marine, aircraft, industrial or stationary use.
Abstract: An uninterrupted power source (UPS) system is provided by utilizing a synchronous motor to power an alternator which provides the desired uninterrupted output power. Normally, the synchronous motor is powered by utility line power. However, an interruption in utility power will cause the motor-alternator set to slow down, although the inertia of the system will continue generating power. If the utility power interruption is sufficient such that the alternator output frequency drops more than 1 Hz, or if reverse power flow is detected from the synchronizing motor back into the utility grid, the motor is automatically powered by an inverter driven from a battery-powered current source. A feedback system from the alternator output insures that the inverter is synchronized with the synchronous motor in order to quickly bring the alternator's output back up to the desired voltage and frequency level.
Abstract: A control circuit for automatically controlling and transferring various power sources for a recreational vehicle or the like. More particularly, the system responds to various load demands, contingencies and conditions to control and transfer the power supplied to the recreational vehicle between a land line, a motor generator, and an inverter.
Abstract: A battery/mains generator set for the production of a continuing electricity supply in the event of failure of the mains supply, the set comprising an a.c. machine capable of operating either as a generator or as a motor and, mechanically coupled thereto, a d.c. machine also operable either as a generator or as a motor, the a.c. machine being, in operation, permanently connected, with the mains supply through a static switch, which prevents back-flow of power into the mains, the a.c. machine, when mains driven, being operable as a motor and driving the d.c. machine, which then operates as a generator and charges a battery in accordance with a required I/V characteristic curve, and, on failure of the mains supply, the d.c. machine being operable as a motor powered by the battery to drive the a.c.