A power supply system to provide power to a load connected between first and second connectors. The system includes a generator that produces an alternating current generator output and a rectifier that receives the alternating current generator output and converts it into a direct current output and provides the direct current (DC) output between the first and second connectors. The system also includes a filter connected to the rectifier and between the connectors and that smooths the DC output. The filter includes a midpoint configured to be connected to ground. The system also includes a fault clearing source connected to the first connector that provides a clearing voltage to the first connector when a ground fault occurs on the first connector.

A power supply system to provide power to a load connected between first and second connectors. The system includes a generator that produces an alternating current generator output and a rectifier that receives the alternating current generator output and converts it into a direct current output and provides the direct current (DC) output between the first and second connectors. The system also includes a filter connected to the rectifier and between the connectors and that smooths the DC output. The filter includes a midpoint configured to be connected to ground. The system also includes a fault clearing source connected to the first connector that provides a clearing voltage to the first connector when a ground fault occurs on the first connector.

According to one embodiment, a control system includes a chopper, a short-circuit unit, a voltage detector circuit, and a controller. The chopper reduces a direct current voltage between a converter connected to a stator in a wound induction machine and an inverter connected to a rotor in the wound induction machine. The short-circuit unit shorts a wire used for connection between the rotor and the inverter and the voltage detector circuit is to detect the direct current voltage. The controller causes driving the chopper and, at the same time, outputting from the inverter an alternating current over which a direct current component is superimposed when a voltage value exceeds a first predetermined value, and causes driving the short-circuit unit and, at the same time, halting the inverter when the voltage value exceeds a second predetermined value.

According to one embodiment, a control system includes a chopper, a short-circuit unit, a voltage detector circuit, and a controller. The chopper reduces a direct current voltage between a converter connected to a stator in a wound induction machine and an inverter connected to a rotor in the wound induction machine. The short-circuit unit shorts a wire used for connection between the rotor and the inverter and the voltage detector circuit is to detect the direct current voltage. The controller causes driving the chopper and, at the same time, outputting from the inverter an alternating current over which a direct current component is superimposed when a voltage value exceeds a first predetermined value, and causes driving the short-circuit unit and, at the same time, halting the inverter when the voltage value exceeds a second predetermined value.

A power generation system is provided. The system includes a prime mover for transforming a first energy to a second energy. The system also includes an induction generator operatively coupled to the prime mover and configured to generate electrical power using the second energy. The system further includes an inverter electrically coupled to the induction generator for controlling a terminal voltage of the induction generator during a grid-loss condition. The system also includes a power dissipating device operatively coupled to the inverter for dissipating power generated by the induction generator during the grid-loss condition.

System (17) for managing a supply voltage (B+A) of an onboard electrical network of a motor vehicle comprises a device (2, 4, 9, 16) for regulating the supply voltage and a device (10, 11) for protecting the onboard electrical network against overvoltages, the two devices together controlling an excitation of an alternator supplying the onboard electrical network. According to the invention, the protection device is separate from the regulating device. An overvoltage signal (OVD) generated by the protection device (11) and controlling the excitation has priority over an excitation signal (EXC) generated by the regulating device. The regulating device and the protection device can be in the form of two separate electronic blocks on separate substrates.

An output of a generator may vary according to the speed of the engine, physical characteristics of the engine, or other factors. A profile for a generator that describes a periodic fluctuation in an operating characteristic for the generator is identified. A field current of an alternator associated with the generator is modified based on the profile for the generator in order to counter variations in the output of the generator.

A regulator, and vehicle alternator and rotating speed detection method thereof are provided. The vehicle alternator includes a rotor coil, a stator coil portion, a rectifier circuit and a regulator. The regulator is configured to control a current flowing through the rotor coil. The rotor coil collaborates with the stator coil portion to convert mechanical energy to alternating current (AC) electrical energy. The rectifier circuit converts the AC electrical energy provided by the stator coil portion to direct current (DC) electrical energy. When the vehicle alternator performs auto start operation by using residual magnetism, the regulator detects a frequency of a rotor voltage signal on the rotor coil to serve as a basis of calculating a rotating speed of the vehicle alternator.

A rotary electric machine for a vehicle is provided. The rotary electric machine includes a power system circuit which has a power element and is grounded via a first ground terminal and a first connecting line and a control system circuit which controls the power system circuit and is grounded via a second ground terminal and a second connecting line.

A rotary electric machine for a vehicle is provided. The rotary electric machine includes a power system circuit which has a power element and is grounded via a first ground terminal and a first connecting line and a control system circuit which controls the power system circuit and is grounded via a second ground terminal and a second connecting line.