Abstract: An alternator includes an exciter field device generating an exciter magnetic field in a first air gap, an exciter armature device configured to rotate with respect to the exciter magnetic field and impart a first voltage in a first set of coils at the first air gap, a main stator device including a second set of coils, and a rotor field device configured to be energized by the first current in the first set of coils and generate a main magnetic field that imparts a second voltage on the main stator device at a second air gap. The main stator device and the exciter field device lie in on a common plane normal to an axis of rotation, and the exciter armature device is inwardly spaced from the exciter field device, main stator device, and the rotor field device.

Abstract: The method of control according to the invention slaves a DC voltage generated by the alternator to a predetermined setpoint value by controlling an excitation current flowing in an excitation circuit comprising an excitation winding of a rotor of the alternator. The excitation current is controlled by means of a semiconductor switch, in turn controlled by a control signal having a predetermined period. The method comprises a detection of a failure of the excitation circuit. At least one short-circuit of the excitation winding is detected. According to another characteristic of the method, the control signal is generated on the basis of a combination of a setpoint signal formed by pulses of the predetermined period exhibiting a duty ratio representative of the setpoint value and of a detection signal indicative of the short-circuit.

Abstract: The present disclosure relates to motor vehicles. The teachings thereof may be embodied in the operation and control of an externally excited electrical generator in an on-board electrical system of a motor vehicle. An example method may include: setting the excitation voltage within the scope of regulating an actual output voltage of the generator at a predetermined setpoint output voltage of the generator; evaluating load requirements of at least one peak load consumer supplied from the on-board electrical system; identifying exceptional situations based on the load requirements; and in the event of an exceptional situation, setting an associated temporary excitation output voltage of the generator.

Abstract: A power monitoring system includes a plurality of current sensors suitable to sense respective changing electrical current within a respective conductor to a respective load and a conductor sensing a respective voltage potential provided to the respective load. A power monitors determines a type of circuit based upon a signal from at least one of the current sensors and a signal from the conductor, wherein the type of circuit includes at least one of a single phase circuit, a two phase circuit, and a three phase circuit. The power meter configures a set of registers corresponding to the determined type of circuit in a manner such that the configuring is different based upon each of the single phase circuit, two phase circuit, and three phase circuit suitable to provide data corresponding to the determined type of circuit.

Abstract: A power regulator has an input terminal to receive an input voltage, an output terminal to output an output voltage, a transistor connected to the input and terminals, a feedback terminal to receive a feedback voltage, and a control circuit to control the transistor based on the feedback voltage at the feedback terminal and a reference voltage so as to keep the output voltage constant. Various implementations include an open detection circuit to detect an open state of the feedback terminal and, on detecting the open state, to vary the reference voltage and thereby keep the transistor in an OFF state, or a voltage holding circuit configured to hold the output voltage constant at a second voltage lower than the first voltage when the feedback terminal is in an open state.

Abstract: When an electrical primary frequency of power fluctuation of a motor is smaller than a determination threshold value fth1 that is a lower limit frequency of a frequency band where resonance occurs in a circuit including a reactor and a capacitor of a boosting converter or greater than a determination threshold value that is an upper limit frequency of the frequency band where resonance occurs, a value G2 is set as a gain G and when the electrical primary frequency is equal to or greater than the determination threshold value fth1 and equal to or smaller than the determination threshold value, a value G3 at which the upper limit frequency of the resonant frequency band has a low frequency than the determination threshold value fth1 is set as the gain G, and a current control in the boosting converter is executed using the gain G set in this way. The resonance of the circuit including the reactor and the capacitor of the boosting converter can be prevented.

Abstract: A hybrid-vehicle power generator control apparatus includes an integrated control unit that issues a driving command and a control command to an engine control unit and an electric-power conversion system control unit, respectively, based on requested electric power requested by a load apparatus, and a limiter that limits the control command from the integrated control unit such that when rotation frequency of an electric power generator is same as or lower than a predetermined value, the value of torque generated by the electric power generator becomes smaller than the value of torque generated by an engine. A limitation of the control command by the limiter prevents torques of the engine and the electric power generator from stepping out of the stable operating points.

Abstract: Example implementations relate to circuits. For example, an implementation includes a detection circuit including a comparator circuit. The comparator circuit includes a first input terminal, a second input terminal, and an output terminal. The detection circuit also includes a reference voltage circuit to provide a set point voltage to the comparator circuit via the first input terminal. The detection circuit further includes a diode to reduce the set point voltage from a first magnitude to a second magnitude when the first magnitude is equal to or lower than a magnitude of the load voltage.

Abstract: The invention relates to apparatus (40) comprising: an inductor; a rectifier coupled to the inductor; a voltage converter coupled to the rectifier; a battery coupled to the voltage converter; a load coupled to the voltage converter; and a control unit coupled to the voltage converter and arranged to cause either the battery to be charged by the rectifier, or the load to be powered by the rectifier, or the load to be powered by the battery, as a function of the state of a switch for controlling powering of the load and as a function of the output voltage of the rectifier.

Abstract: The invention relates to a voltage regulator (43) for a motor vehicle alternator (44). The device comprises a control module (I) for controlling an excitation current (lexc) in an excitation winding (3) of the alternator (44) according to a difference (5) between a setpoint voltage (DO) and a control voltage (Dbat) of an on-board network (9). The on-board network (9) of the vehicle is powered by a battery (10) to which the alternator (44) is connected. According to the invention, the voltage regulator (43) further comprises a safety module (30) that monitors the control voltage (Ubat) and which is separate from the control module (I). In a particular embodiment, the control module (I) and the safety module (30) are connected electrically by external bonding interconnections.

Abstract: A method for implementing energy saving for a mixed insertion system (80) of rectifiers with different power includes: acquiring work-related input information, and identifying a type of a rectifier (100); determining a power-on/power-off control mode of each rectifier (200); and performing power-on/power-off rotation, and load change rotation (400) and periodic rotation (500) starting according to the power-on/power-off control mode of each rectifier (300). A mixed insertion system of rectifiers with different power and a device for implementing energy saving thereof are further disclosed.

Abstract: A system to control an electrical device, such as a lighting component or set of components. The system includes a set of connection lines, a power control module and a load interface component. The power control module is responsive to an alternating current source being connected to one of a first connection line and a second connection line to provide a regulated voltage signal output. A load interface component receives the regulated voltage signal output to control the electrical device.

Abstract: The invention relates to a grid synchronizer for connecting an AC output of a power converter to the AC grid mains. In one aspect the invention provides a grid synchronizer comprising an inverter controller to control an AC output of the inverter, the controller including a receiver to receive grid data from a grid sensor location remote from said inverter. In another aspect we describe techniques for rapid removal of charge from a control terminal of a power switching device such as a MOSFET, IGBT or Thyristor using a particular driver circuit.

Abstract: A hand dryer comprising a universal brushed AC blower vacuum motor, one or more resistive circuits of a heating element, and a universal voltage controller that selectively alternates the configuration and the electrical connection of the resistive circuits, in response to a detected input voltage is disclosed.

Abstract: The invention relates to a method for controlling a generator of electric energy that is connected to an electric supply grid on a grid connection point, comprising the following steps: incorporating at least one grid characteristic of the electric supply grid related to the grid connection point, and controlling the generator in such way that it feeds power into the electric supply grid depending on the incorporated grid characteristic.

Abstract: A static vacuum shafting device for an integrated rotary transformer includes: a driving component, a vacuum sealing cover, a position detection component, a shafting base, a vacuum insulation sleeve, three O-shaped seal rings, a first rolling bearing, a second rolling bearing, a bearing gap ring, a transmission shaft, a shafting flange, a walking rolling bearing, and two bearing glands. The driving component includes a motor stator, a rotary transformer stator, a motor and rotary transformer integrated rotor, a rotor flange plate and a stator-fixing pressing block which are coaxially assembled. The vacuum sealing cover includes a sealing cover upper flange, a sealing cover, and a sealing cover lower flange. The shafting device couples a motor shaft to a load rigidly, thereby achieving a “zero-transmission” method and a “zero-leakage” sealed transmission of a shafting, and is particularly suitable for a power transmission of a vacuum robot in a high-vacuum environment.

Abstract: A switching converter having a high-side switching transistor and a low-side switching transistor and an inductor, having a circuit for generating a simulated waveform representing a sawtooth inductor current waveform. A circuit for monitoring and voltage at a switch node between the high-side and low-side transistors to determine a time during which the inductor current is increasing and a time during which the inductor current is decreasing wherein voltage across the low-side transistor when it is conducting represents a first portion of the simulated sawtooth inductor current waveform. A circuit for utilizing the time when the inductor current is increasing, the time when the inductor current is decreasing and the voltage across the low-side transistor when it is conducting to generate a portion of the simulated inductor current waveform when the high-side transistor is conducting. A method and a power supply utilizing this circuit are also disclosed.

Abstract: An uninterruptible power supply (UPS) includes a line terminal, a load terminal, a double-conversion circuit coupled in series, and further includes a bypass circuit, and a synchronize circuit. The line terminal couples to a doubly fed induction generator (DFIG). The load terminal couples to a load having a demanded power. The double-conversion circuit regulates grid power from the line terminal to the demanded power at the load terminal. The bypass circuit is coupled between the line terminal and the load terminal, and configured to deliver regulated power generated by the DFIG to the load terminal when the grid power is lost. The synchronize circuit is coupled between the double-conversion circuit and the DFIG, and, when the grid power is lost, the synchronize circuit injects a current through the double-conversion circuit and into the DFIG, synchronizing the regulated power generated by the DFIG to the demanded power.

Abstract: A synchronous machine and related systems include a stator and rotor separated by an air gap. The rotor includes a rotating DC power supply coupled to exciter windings disposed adjacent the air gap. Power from air gap harmonics, including air gap slot harmonics induce current in the exciter windings, which is rectified and supplied to the rotor field windings. In operation, a desired current level in the rotor field windings can be achieved through control of the DC power supply or superposition of harmonics into the stator winding current which induces the prescribed current in exciter windings.

Abstract: The present invention relates to the field of generator technology. It is an object of the invention to control the stability in an electric grid in which a plurality of generators are connected providing electric power to the grid. A static exciter system includes a control device for controlling the field voltage of the field winding of at least two generators connected to a grid system via a busbar.

Abstract: This system for supplying electrical power to a load includes an asynchronous generator including a cage rotor intended to be driven by motor means and a rectifier adapted to rectify the voltage delivered by the generator. The rectifier is a rectifier employing unidirectional electronic components. The power supply system further includes a reactive power source for magnetizing the asynchronous generator.

Abstract: In a power generator, a determiner determines whether a phase voltage output from each of multiphase armature windings has exceeded a threshold voltage. A turn-on unit turns on at least one of the protective switches as a target protective switch to limit the output voltage of the rectifier circuit to be lower than the threshold voltage upon the phase voltage output from at least one of the multiphase armature windings corresponding to the at least one of the protective switches has exceeded the threshold voltage.

Abstract: A method and apparatus for operating a generator control unit having power bridge, further including having an input and at least one output, wherein the input is operably coupled with a generator power output, and a controller communicatively coupled with the power bridge and configured to operate the power bridge.

Abstract: A discharge switch device is provided that includes a comparator portion, a temperature compensation diode, and a trigger portion. The comparator portion is configured to compare an input voltage value to a reference voltage value. The temperature compensation diode is configured to reduce variation of the reference voltage value. The trigger portion is configured to discharge stored energy when the input voltage value exceeds the reference voltage value.

Abstract: An estimating section detects a signal including counter electromotive voltage information of the motor, and estimating a magnetic pole electric angle and a rotational speed of the motor. A driving current controller repeats generation and cut-off of the driving current supplied from a power supply to the motor via the inverter circuit or regenerated from the motor to the power supply in a low-speed period between a stopped state and a predetermined rotational speed in an accelerating operation at a motor starting time or a decelerating operation at a motor stopping time. The estimating section detects the signal at the cut-off time so as to estimate the magnetic pole electric angle and the rotational speed in the low-speed period.

Abstract: A voltage regulator system for regulating an output voltage of a genset includes a voltage regulator for reducing terminal voltage in response to a reduction in terminal frequency. A plurality of under-frequency roll-off (UFRO) states is provided in the voltage regulator, with each UFRO state being configured to implement a UFRO characteristic. An operational signal indicative of an operating condition of the genset forms the basis for selection of the UFRO characteristic.

Abstract: A system and method for controlling the main field current in an electrical generator is disclosed. The system can include a controller to sense the voltages and currents in the system to identify load faults. The system can also comprise one or more switches and an energy dissipator to absorb, store, or dissipate the main field current in the event of a load fault, such as a short circuit. In the event of a load fault, the controller can change the position of the one or more switches to redirect the main field current from the main field windings of the rotor to the energy dissipator. The energy dissipator can absorb or store the main field current significantly reducing the time required to stop the output current of the generator.

Abstract: Methods and a voltage regulator are provided for distributing power sourcing in a hybrid power plant system. The voltage regulator is configured to monitor an output power of a generator and control an excitation signal provided to the generator based at least in part on the generator output power.

Abstract: A method for controlling an alternator or alternator-starter of a motor vehicle, the electric machine being capable of providing an electric current, the strength of which varies on the basis of the excitation signal (EXC). A duty cycle is associated with each excitation signal. The method includes comparing the difference between the duty cycle values of two consecutive excitation signals at a predetermined threshold. If the difference is greater than the predetermined threshold, a gradual response phase is released, during which the duty cycle of the excitation signals is gradually increased, particularly in a substantially linear manner. At the start of the gradual response phase, the duty cycle of the consecutive excitation signals is increased by a predetermined jump (D,B), then the duty cycle is gradually increased. The duty cycle jump at the start of the gradual response phase being less than or equal to the release threshold of the gradual response phase.

Abstract: There is provided an electronic device system including a plurality of battery packs, and an electronic device that is driven by a power source supplied from the battery packs. At least one battery pack of the plurality of battery packs outputs one or both of discharge information indicating whether the battery pack is dischargeable and charge information indicating whether the battery pack is chargeable, and the electronic device includes a control unit that performs one or both of control of discharge of the battery pack based on the discharge information and control of charge of the battery pack based on the charge information.

Abstract: A power supply includes: a first connection terminal connectable with a DC power supply to which a first load and a generator are connected in parallel; a second connection terminal connectable with an electric storage which stores regenerative power generated by the generator; a third connection terminal connectable with a second load; a DC-DC converter; and a controller which controls the DC-DC converter. The power supply further includes: a first power path including one end connected to the first connection terminal and the other end connected to a first input/output terminal of the DC-DC converter; a second power path including one end connected to the second connection terminal and the other end connected to a second input/output terminal of the DC-DC converter; and a third power path including one end connected to the third connection terminal and the other end connected to the second power path.

Abstract: A transmission having a plurality of tilting balls and opposing input and output discs provides an infinite number of speed combinations over its transmission ratio range. The transmission provides multiple powerpaths and can be combined with electrical components to provide motor/generator functionality, which reduces the overall size and complexity of the motor and transmission compared to when they are constructed separately. In one embodiment, rotatable components of a continuously variable transmission are coupled separately to an electrical rotor and to an electrical stator so that the rotor and stator rotate simultaneously in opposite directions relative to one another. In other embodiments, an electrical rotor is configured to transfer torque to or from a disc that is in contact with a plurality of speed adjusters, while an electrical stator is configured to transfer torque to a shaft that is operationally coupled to the speed adjusters via an idler.

Abstract: A method for activating a rectifier having active switching elements in the event of a load dump, the active switching elements being activated during the voltage clamping in such a way that the clamp voltage in at least one switching branch complies with a signal form predefined as a function of time within at least one half-period of the current to be rectified.

Abstract: An AC measurement circuit includes a rectifier for receiving an AC signal; a peak detection circuit; and a voltage divider, interconnected with an output of the rectifier, and the input of the peak detection circuit to provide the peak detection circuit with a voltage value equal to a fraction of the AC signal. An analog to digital converter, has its analog input interconnected with an output of the peak detection circuit, for providing a digital output corresponding to its analog input. A summing circuit sums n samples of the digital output. The voltage divider is configured so that the summing circuit calculates an average measurement of the AC signal by summing n samples and without floating point division.

Abstract: A system (for controlling cooling of an alternator) comprises a control system, an alternator, and a blower fan, the alternator having a stator and a rotor. The control system is adapted to estimate one or more temperatures of the stator and/or rotor of the alternator using a thermal model. The control system is also adapted to control the blower fan to cool the alternator by providing a specified amount of air flow across the stator and rotor of the alternator, based on the estimated one or more temperatures of the stator and/or rotor.

Abstract: An electrical rotating machine system that can be easily maintained and can provide improved power generation efficiency. The electrical rotating machine system includes: a first electrical rotating machine having a first stator that has first stator windings, and a first rotor that has first rotor windings and is disposed on the internal diameter side of the first stator so as to have a gap between the internal diameter side of the first stator and the first rotor itself; a second electrical rotating machine having a second stator that has second stator windings, and a second rotor that has second rotor windings and is disposed on the internal diameter side of the second stator so as to have a gap between the internal diameter side of the second stator and the second rotor itself; and at least one power converter that is electrically connected to the first rotor windings and the second rotor windings, and configured to rotate when the first rotor rotates.

Abstract: A permanent magnet machine includes two stationary stators and a rotating rotor. Electromagnetic fields occurring in one stator are displaced by an angle of thirty electrical degrees with respect to electromagnetic fields occurring in the other stator due to currents fed to the stators.

Abstract: The invention relates to a method for operating a stationary power plant, wherein a fuel/air mixture is burned in an internal combustion engine and wherein the internal combustion engine drives an alternating current generator, which is connected to an energy supply network and provides energy to the energy supply network, wherein if the actual rotational speed of the alternating current generator or of the internal combustion engine exceeds a predefinable maximum value due to a failure of the energy supply network, the combustion in the internal combustion engine is stopped at least partially, while the connection to the energy supply network is maintained.

Abstract: There are provided methods for preparing lithium carbonate. For example, such methods can comprise reacting an aqueous composition comprising lithium hydroxide with CO2 by sparging the CO2 the said composition, thereby obtaining a precipitate comprising the lithium carbonate. The methods can also comprise inserting at least a portion of the precipitate into a clarifier and obtaining a supernatant comprising lithium bicarbonate and a solid comprising the lithium carbonate, separating the solid from the supernatant; and heating the supernatant at a desired temperature so as to at least partially convert the lithium bicarbonate into lithium carbonate.

Abstract: An alternator has a field coil that produces a magnetic field which induces electricity in a coil arrangement. A field coil excitation system includes a generator with an output coil assembly for producing alternating electricity. A rectifier converts the alternating electricity into voltage and direct current at two nodes. A capacitor, between the nodes, has capacitance that forms a resonant circuit with inductance of the output coil assembly. Due to that resonant circuit, the voltage and direct current oscillate in a predefined phase relationship. A switch and the field coil are connected in series between the nodes. A controller renders the switch conductive for a time period specified by a received control signal. The switch is rendered non-conductive at the first occurrence of a minimum current level after the time period ends. The predefined phase relationship enables the minimum current level to be detected by sensing the voltage.

Abstract: A vehicle comprises a rotary electric machine, an inverter and an electronic control unit. The inverter is configured to supply current to the rotary electric machine. The electronic control unit is configured to set a control mode of the inverter to a first mode on a condition that the electronic control unit determines that there is no possibility of occurrence of the electrolytic corrosion. The electronic control unit configured to set the control mode of the inverter to a second mode and maintain output of the rotary electric machine at user request output on a condition that the electronic control unit determines that there is a possibility of occurrence of the electrolytic corrosion. The second mode is a mode in which occurrence of the electrolytic corrosion is further suppressed compared to the first mode.

Abstract: A power supply system for EV and a control method thereof are provided, the system including a high voltage battery generating a driving voltage to a motor of the EV, a low voltage battery generating a driving voltage for other electronic equipment, an LDC (low voltage DC-DC Converter) converting a high voltage generated by the high voltage battery to a low voltage, and generating a control power for charging the low voltage battery, an alternator generating a control power for charging the low voltage battery using a rotary power of the motor, and a control power selector selectively supplying the control power generated by the LDC or the alternator to the low voltage battery.

Abstract: A method for determining the position of an at least two-phase, in particular three-phase bmshless electric drive comprising at least two phase windings, each of which has a first and a second terminal, a second terminal of a first phase winding being electrically connected to the first terminal of a second phase winding at a common connecting terminal. In order to be able to reliably determine the position of the electric drive even at low speeds, a voltage pulse is applied between the first terminal of the first phase winding and the second terminal of the second phase winding, the resulting voltage at the connecting terminal or at a third phase winding connected thereto is detected and the voltage ratio between the first phase winding and the second phase winding is determined therefrom, and the ratio between the variable inductances is determined from said voltage ratio.

Abstract: A synchronous rectification alternator for a motor vehicle is disclosed. The alternator includes a stator, a rotor, and a synchronous rectification system for rectifying into a DC voltage the alternating voltages supplied by the stator, and a voltage regulator for regulating the DC voltage. The alternator also includes fault detection for detecting faults in the synchronous rectification and supplying fault detection information to the voltage regulator. In one version, the fault information is supplied to the voltage regulator at fault inputs also receiving phase signals representing the alternating voltages supplied by the stator. At least one of the items of fault information is used to cause, in the voltage regulator, opening of an excitation circuit supplying current to an excitation coil of the rotor so as to produce, in the voltage regulator, a fault indication.

Abstract: A magnetic-field detection microcomputer includes: a magnetic-field detection device; a differential amplifier; a variable voltage circuit which generates a reference voltage that is variable; a comparator which compares an output from the differential amplifier with the reference voltage; a register which outputs a voltage control value to the variable voltage circuit; a ROM which previously store a first table in which a magnetic-field intensity and the voltage control value are associated with each other; and a CPU which sets, to the register, the voltage control value, and determines presence or absence of the magnetic-field intensity associated with the voltage control value based on a result of the comparison by the comparator and the first table.

Abstract: Embodiments of the present invention relate to the field of electronic technologies, and provide a current-limiting circuit and apparatus to reduce costs of the current-limiting circuit and an occupied PCB board area. The circuit comprises a detecting resistor, a current-limiting resistor, a precise current unit, a power metal oxide MOS transistor, an operational amplifier OP and an input voltage end.

Abstract: [Problem to be Solved] To provide a regulator capable of more appropriately preventing the voltage of a battery from increasing beyond a full-charge voltage during a battery chattering. [Solution] A regulator 1 includes a rectifying circuit 2, a first battery detecting circuit 3, a first full-charge detecting circuit 4, a first differentiating circuit 5 having a fifth resistor r5 connected between a first terminal T1 and one end of a first capacitor C1 and a second capacitor connected in series with the fifth resistor r5 between the first terminal T1 and one end of the first capacitor C1, and a first driving circuit DR that controls the rectifying circuit 2 to rectify an alternating current according to output of an alternating-current generator ACG and controls the rectifying circuit 2 to operate or stop according to signal at one end of a first battery connecting switch element SW1.

Abstract: A device for minimizing the current consumption of a motor vehicle generator from the battery during the starting phase of a motor vehicle, has a generator unit and a generator regulator. The generator regulator includes a regulator control, which has a unit for providing a first control signal having a fixedly specified pulse duty factor, a unit for providing a second control signal having a pulse duty factor that is a function of the excitation current, and a unit for selecting the control signal having the smaller of the two pulse duty factors, which is supplied to the output stage of the generator regulator as the control signal.

Abstract: A semiconductor device includes a rectifier coupled between a circuit ground and a terminal for coupling to an external circuit, a transistor-enhanced current path coupled to the rectifier, and a switching circuit coupled to the transistor-enhanced current path and coupled between the terminal and the circuit ground. The switching circuit is configured to turn off the transistor-enhanced current path during normal operation, and turn on the transistor-enhanced current path when an electrostatic discharge occurs at the terminal.

Abstract: A magnetic shielding arrangement, including: at least one magnetic flux source; a superconductor magnetic shield at least partially surrounding the magnetic flux source; a second shield at least partially surrounding the superconductor magnetic shield.