A three-phase generator charges a battery under high and low load conditions through a bridge rectifier. The windings of the A.C. generator are connected in a Y connection when the system under high load and in series when the system is under low load.

A power source unit for an automotive vehicle comprises an alternator, a rectification unit for converting an alternating current output of the alternator to a direct current, and outputting same through first and second output sections, a first power accumulation unit connected in parallel with a first load, for receiving a power supply through the first output section, a second power accumulation unit connected in parallel with a second load, for receiving a power supply through the second out...

A static excitation system for self-excitation of a large generator with an electromagnetic energy converter having a rotating secondary winding supplying power through rotating rectifiers to the generator field. An AC regulated power source for the primary winding of the electromagnetic energy converter is supplied from internal windings in the generator stator having current-responsive and potential-responsive characteristics to provide a "compounded" power source. The potential-responsive win...

A rotary electric machine has two sub-windings shifted by 30 degrees from each other. Each sub-winding is connected to an individual bridge which has MOS transistors on the ground sides. It is possible to supply a charging current even at a low rotational speed by switching the MOS transistors at a high-frequency. The basic components of magnetic force are canceled because of the shifted sub-windings. The switching components of the magnetic forces generated by the switching operation are cancel...

A dual voltage supply system supplies high and low voltage electrical power to separate high and low voltage loads. The system includes an AC alternator and first and second rectifier circuits, each connected to the alternator and a corresponding high and low voltage load. The first rectifier circuit commutates the alternator voltage to the high voltage load when the alternator voltage is higher than a voltage of the high voltage load. The second rectifier circuit commutates the alternator volta...

An alternator generates output power at two or more independent voltages. The alternator has two independent output windings configured to generate the power needed for each output. Each output voltage is sensed by a regulator that controls switching rectifiers to supply the current needed to satisfy the electric power demand of the loads connected to each output. After both output load demands are satisfied, the regulator switches off the alternator field. When power demand from either load ris...

An alternator generates output power at two or more independent voltages. The alternator has two independent output windings configured to generate the power needed for each output. Each output voltage is sensed by a regulator that controls switching rectifiers to supply the current needed to satisfy the electric power demand of the loads connected to each output. After both output load demands are satisfied, the regulator switches off the alternator field. When power demand from either load ris...

An automobile ac generator system comprises a generator driven by the engine of the automobile, a system controller for converting the ac power generated by the generator to dc power, controlling the generator on the basis of the voltage of the converted dc power and converting the dc power to ac power of commercial line frequency, and a mode switch for selecting among control operating modes of the system controller.

A device such as an electric motor, an electric generator, or a regenerative electric motor includes a rotor arrangement and a stator arrangement. The stator arrangement has a dielectric electromagnet housing and at least one energizable electromagnet assembly including an overall amorphous metal magnetic core. The overall amorphous metal magnetic core is made up of a plurality of individually formed amorphous metal core pieces. The dielectric electromagnet housing has core piece openings formed...

A first and a second full-wave rectifying network are respectively connected with both ends of phase coils of a current generator for respectively generating alternating current thereat. A first and a second additional diode are respectively connected between both positive and negative direct current terminals of the first and second full-wave rectifying network. A switching device has normally closed contacts connected across the positive and negative terminals of the second full-wave rectifyin...