An alternator system includes an alternator with a stator having at least one stationary winding and a rotor with a rotatable field coil for producing alternating current, a main voltage regulator having a main controller and a main power switch configured to control the current through the field coil, a redundant voltage regulator having a redundant controller and a redundant power switch configured to control the current through the field coil. The main power switch, the field coil and the redundant power switch are connected in series, in that order. A power supply for an electrical system includes a battery and the alternator system. A vehicle includes the power supply.

Methods and systems for determining an alternator condition in a motor vehicle are provided. The method includes receiving a maximum cranking voltage and a maximum cranking voltage time stamp from the motor vehicle over an asset interface of the telematics device; receiving a maximum device voltage and a maximum device voltage time stamp from the motor vehicle over the asset interface, and determining a potential alternator undercharging condition if a duration between the maximum cranking voltage time stamp and the maximum device voltage time stamp is greater than an undercharging indicator duration threshold. Advantageously, an alternator may be repaired or replaced before it fails thus averting having the motor vehicles inoperable.

A method for controlling a multi-phase rotary electric machine is disclosed. The stator of the machine is controlled by a control bridge having a plurality of parallel mounted switching arms, with each arm comprising a high-side switch and a low-side switch connected at a center tap connected to a phase of said rotary electric machine. The machine operates as a generator and is connected to an electrical network on board a motor vehicle. The method involves short-circuiting a phase winding of the stator when a measurement of the voltage of said network exceeds a first predetermined value, and after this, activating a switching arm, the center tap of which is connected to said at least one short-circuited phase winding, during which the intensity in the short-circuited winding is measured, if the measured intensity is positive, the high-side switch of said activated switching arm is moved to the closed position, otherwise, it is moved to the open position.

An aircraft with an electrical network including electrical subnetworks; a turbo generator including a gas turbine, an electricity generator with permanent magnets having phase groups respectively connected to the electrical subnetworks, and, for each phase group, an isolation device; and a control device designed to detect a short circuit in at least one of the phase groups, each phase group in which a short circuit is detected being described as defective and each other phase group being described as healthy and, in response to the detection of the short circuit, to disconnect this defective phase group from its associated electrical subnetwork and to command the shutdown of the gas turbine. The control device is also designed, in response to the detection of the short circuit, to keep each healthy phase group connected to its electrical subnetwork.

An Integrated Starter Generator System The present invention relates to an Integrated Starter Generator system (100) comprising a battery (110) and a three-phase brushless DC electric machine (130). The electric machine (130) has a stator (132) with 6n stator teeth (132′), ‘n’ being a natural number, and each stator tooth (132′) has a coil corresponding to one of the three phases. The electric machine (130) further has a rotor (134) with 6n±2 rotor poles (134′) facing the stator, and magnets on the rotor poles (134′) are disposed with an alternating sequence of magnet polarity facing the stator (132).

A fluid sprayer includes a housing, a pump, a nozzle, a high voltage direct current (HVDC) brushed electric motor that drives the pump, and a motor controller electrically connected to the motor. The motor controller drives the motor with a high speed pulse width modulated (PWM) drive signal that switches current through the motor on and off. The motor controller varies the PWM signal as a function of a spray setting input and sensed current through the motor.

The invention relates to a device for controlling an alternator of the type that controls a DC voltage (B+A) generated by the alternator (11) according to a predetermined set voltage (U.sub.0) by monitoring the intensity of an energising current (I.sub.EXC) flowing through an energising circuit of the alternator. According to the invention, the device includes a voltage-control loop (7) and a temperature-control loop (17) which comprises a temperature sensor supplying a current temperature (T) of components of the alternator, a subtracter (19) supplying a temperature error (ε.sub.t) between the current temperature (T) and a maximum acceptable temperature (T.sub.max) and a control module (20) supplying a maximum admissible energising percentage (r.sub.max) in accordance with the temperature error according to a predetermined control law.

A high voltage power generating system includes a first poly-phase permanent magnet generator including at least one control winding and a plurality of power windings, a second poly-phase permanent magnet generator including at least one control winding and a plurality of power windings, the first and second poly-phase permanent magnet generators being arranged in series in at least one operational mode, and the first poly-phase permanent magnet generator being phase shifted relative to the second poly-phase permanent magnet generator such that residual voltage output of the first poly-phase permanent magnet generator is offset by the second poly-phase permanent magnet generator during a first operational mode.

A high voltage power generating system includes a first poly-phase permanent magnet generator including at least one control winding and a plurality of power windings, a second poly-phase permanent magnet generator including at least one control winding and a plurality of power windings, the first and second poly-phase permanent magnet generators being arranged in series in at least one operational mode, and the first poly-phase permanent magnet generator being phase shifted relative to the second poly-phase permanent magnet generator such that residual voltage output of the first poly-phase permanent magnet generator is offset by the second poly-phase permanent magnet generator during a first operational mode.

A high voltage DC electric power generating system includes a poly-phase permanent magnet generator having at least one control winding and a plurality of power windings. Each of the power windings is a phase of the poly-phase permanent magnet generator. A passive rectifier connects a switch to an input of each of the power windings such that the switch is a neutral node in a closed state and a disconnect in an open state.