Abstract: The invention concerns a method for determining a mechanical stress of a runner (40), of a hydraulic machine (10), wherein the runner is arranged to rotate around a rotation axis, wherein the hydraulic machine comprises a hydraulic channel delimited by hydraulic surfaces of the runner, the hydraulic surfaces being the surfaces against which a stream of water exerts the forces when the runner is driven in rotation by said stream of water, wherein the runner further comprises a sensor (G) on protected areas positioned away from the hydraulic channel, the method comprises the steps of: a) collecting a physical quantity measured by the sensor (G), b) determining a mechanical stress on a specific location of the hydraulic surface, via a transfer function that correlates the physical quantity measured in step a) and said mechanical stress on the specific location.

Abstract: A revolution position of an engine is set to a revolution position suitable for a start. A control apparatus for an electric vehicle includes an engine, a motor which generates electricity, a battery, a first controller which drives the engine, a second controller which drives the motor, and a sensor. The second controller confirms a relative position relationship between a revolution position of the engine and a rotation position of the motor by acquiring information of the revolution position of the engine from the first controller during the electricity generation driving by the motor and monitors the revolution position of the engine based on the relative position relationship and a signal from the sensor, and the second controller checks the stop position of the engine through the monitoring of the revolution position of the engine when the motor finishes the electricity generation driving.

Abstract: An interface system for connecting a vehicle and a transport climate control system (TCCS) is disclosed. The interface system includes a two-way communication interface that connects a vehicle electrical system (VES) controller and a TCCS controller. The interface system also includes a power interface that connects a vehicle energy source of the VES to the TCCS and a TCCS energy source of the TCCS to the VES. The two-way communication interface is configured to distribute a TCCS status from the TCCS controller to the VES controller, and is configured to distribute a VES status from the VES controller to the TCCS controller. The power interface is configured to distribute power from the vehicle energy source to the TCCS when a VES instruction is received, and distribute power from the TCCS energy source to the VES when a TCCS instruction is received.

Abstract: An interface system for connecting a vehicle and a transport climate control system (TCCS) is disclosed. The interface system includes a two-way communication interface that connects a vehicle electrical system (VES) controller and a TCCS controller. The interface system also includes a power interface that connects a vehicle energy source of the VES to the TCCS and a TCCS energy source of the TCCS to the VES. The two-way communication interface is configured to distribute a TCCS status from the TCCS controller to the VES controller, and is configured to distribute a VES status from the VES controller to the TCCS controller. The power interface is configured to distribute power from the vehicle energy source to the TCCS when a VES instruction is received, and distribute power from the TCCS energy source to the VES when a TCCS instruction is received.

Abstract: A power conversion device includes a power converter to output AC power by converting input DC power, an electric leakage detector to detect electric leakage in a power supply line through which the AC power output by the power converter flows when the AC power is being output by the power converter, and a power conversion controller configured to control power conversion of the power converter. The power conversion controller is configured to stop power conversion operation of the power converter based on a detection result of the electric leakage detector.

Abstract: The invention relates to a battery system, particularly for using in a local electrical grid, comprising: at least one battery module (1); an output terminal (2) which is electrically connected to the battery module (1) and used to charge and/or discharge the battery module (1) from and/or into the local electrical grid; a disconnector (3) which is arranged between the battery module (1) and at least one pole (21, 22) of the output terminal (2) and is designed to break the electrical connection between the battery module (1) and the at least one pole (21, 22) of the output terminal (2), when open; and a first signal circuit (41) which is designed to generate the triggering of the disconnector (3) in the event of a faulty state detected by the battery module (1) in such a way as to interrupt the electrical connection between the battery module (1) and the at least one pole (21, 22) of the output terminal (2).

Abstract: A power apparatus for a vehicle manages power for a vehicle by performing a power-up operation according to a power-up method determined on the basis of a voltage formed at a power input node connected to a battery of the vehicle when a power-up signal is applied. The power apparatus including a regulator configured to regulate a battery voltage inputted through the power input node; a switch driving circuit configured to turn on/off a switch that controls a connection between the battery and the regulator through the power input node; and a main logic circuit configured to receive control authority for the switch driving circuit from the power apparatus when receiving the power-up signal and the operating voltage generated by the regulator, and to control an on/off operation of the switch.

Abstract: Circuits and methods for reducing lagging responses of a power converter to changes in circuit voltages or current, over-shoot/under-shoot when a target output voltage changes faster than the power converter's response, and open loop conditions. Embodiments include scanning a feedback voltage from a load powered by a voltage output by a power converter controlled by a PWM control signal; detecting an under-regulation condition; and, while the under-regulation condition is detected, increasing a clock signal rate to a counter outputting a count value usable to generate the PWM control signal. Embodiments include comparing a target output voltage to a signal representative of an output voltage of the power converter; indicating an under-shoot or over-shoot condition if the voltage difference exceeds a corresponding offset value; and limiting the range of values for an M-bit count value used to generate the PWM control signal to mitigate the under-shoot or over-shoot condition.

Abstract: A method for operating a wind farm having a plurality of wind turbines, each of which is assigned a minimum power limit (CMPLj), wherein a power setpoint value (SPP) for a power which is to be fed in is specified for the wind farm, in dependence on which power setpoint value (SPP), individual wind turbines are activated or shut down, wherein the activation or shut-down of one or more wind turbines in the wind farm takes place in dependence on the respectively assigned minimum power limits (CMPLj), wherein each wind turbine of the wind farm is assigned a current value for its minimum power limit, and wherein the value takes into account variable operating conditions and/or ambient conditions of the respective wind turbine.

Abstract: A method for diagnosing the operating state of an electrochemical system in real-time comprising a stack of cells, said method comprising steps for performing voltage measurements of said cells. Said method further comprises: real-time processing of the voltage measurements (61) thus performed, in order to extract specific waveforms (40) therefrom, converting said specific waveforms in order to generate specific points (65) therefrom of the real-time operation of the electrochemical system, and comparing these specific points of the real-time operation and specific points (75) of an off-line operation of the electrochemical system that originate from a conversion of specific waveforms (74) extracted from voltage measurements (78) performed off-line, while the electrochemical system is placed in known operating states including fault states, so as to produce information (69) relating to the real-time operating state of the electrochemical system.

Abstract: A system of reactive power compensators for a wind farm includes a multi-winding transformer and a plurality of modular reactive power compensators (MVBs). The multi-winding transformer includes a primary winding and a plurality of secondary windings. The primary winding is configured to be coupled to a point of common coupling (POCC) for the wind farm. The plurality of MVBs are each coupled to a corresponding winding of the plurality of secondary windings.

Abstract: A motor vehicle electrical system which includes an electric machine, an active bridge rectifier, and at least one control device, the at least one control device being configured for converting an alternating voltage which is output by the electric machine at a number of phase connections into a direct voltage by controlling active switching elements of the bridge rectifier. An arrangement is provided configured for initiating a short circuit of at least two of the phase connections as soon as a signal characterizing the direct voltage exceeds an upper threshold value, and for deactivating the short circuit as soon as the signal characterizing the direct voltage subsequently falls below a lower threshold value. An evaluation device is provided configured for detecting a value of the direct voltage, for filtering the detected value, and for providing the filtered value as the signal characterizing the direct voltage.

Abstract: A power system architecture for a vehicle includes a source management unit having at least a generator, a first stored energy component, and a second stored energy component. A high voltage DC bus connects a high voltage load to the source management unit. At least one low voltage DC bus connects at least one low voltage DC load to the source management unit. The source management unit includes a plurality of multi-functional power modules configured such that the source management unit includes a multi-level active rectifier connecting the generator to a multi-level DC bus, a first multi-level multi-function converter connecting the first stored energy component to the multi-level active rectifier, a second multi-level multi-function converter connecting the second stored energy component to a multi-level isolated DC bus, and an isolated multi-level DC-DC converter connecting the multi-level DC bus to the multi-level isolated DC bus.

Abstract: A field current limiting section includes a field current limitation instructing section for, when a field current limitation determining section determines that a determination value has reached a predetermined determination threshold value, generating a field current limiting instruction to a field current control section so as to limit field current to be equal to or smaller than a predetermined permissible value during a predetermined field current limitation time Tlim. A field current limitation releasing section outputs a field current limitation releasing instruction to the field current limiting section so as to release limitation of the field current during a predetermined field current limitation release time TC. When having received the field current limitation releasing instruction from the field current limitation releasing section, the field current limiting section releases limitation of the field current during the predetermined field current limitation release time.

Abstract: Systems and methods for testing a motor drive are disclosed. The techniques enhance motor drive testing by not using a dyne-unit, thereby reducing the initial installation costs, maintenance costs, and size of the setup. The setup may include a rectifier and an inverter configured to operate in an active-reactive power control mode during testing under a simulated load by generating the corresponding active (P) and reactive (Q) power (e.g., torque and flux, respectively). The active-reactive power control mode may receive a desired P and Q and determine one or more gate drive signals to provide to switches in the rectifier and/or the inverter based on the desired P and Q, where the gate drive signals are configured to operate the rectifier and/or the inverter under a simulated load. The gate drive signals may be transmitted to the rectifier and/or the inverter accordingly.

Abstract: A control system for a plug-in hybrid vehicle includes a drive system including a starter motor, a transverse engine, and a motor/generator, and a power supply system including a high voltage battery, a capacitor, and a hybrid control module that controls charging and discharging of the capacitor. In the control system for an FF plug-in hybrid vehicle in which an external charging of the high-power battery is available, the hybrid control module starts the starter, performs mode selection control and charge/discharge control, maintains a capacitor voltage at or below a deterioration free voltage when the CS mode is selected during ignition on, and recharges the capacitor to a starter start-up permission voltage that allows the starter to start when a pre-forecast of the reverse transition from the CS mode to the CD mode is established.

Abstract: An on-demand electric power system for providing on-demand electric power in remote locations. The on-demand electric power system generally includes a protective housing, an engine-generator within the protective housing, a control switch electrically positioned between the engine-generator and an electric load, and a control unit in communication with the engine-generator and the control switch to control operation of the engine-generator along with electrical power to the electric load. The control unit detects when electrical power is required by an electric load and then first starts the engine-generator. After a period of time, the control unit then closes the control switch to provide electrical power to the electric load.

Abstract: A method for operating an energy supply unit for a motor vehicle electrical system, including at least one first subsystem and one second subsystem having different voltage levels, the energy supply unit including an electric machine which is connected via a converter circuit to the first subsystem and the second subsystem. In a first operating mode, a switchable switch element of the converter circuit which connects the converter circuit to the second subsystem is opened, the converter circuit is activated as an inverter circuit and the electric machine is motor or generator operated. In a second operating mode, the switchable switch element of the converter circuit is closed, the converter circuit is activated as a DC-DC converter and the DC-DC conversion takes place between the voltage levels of the first and the second subsystem.

Abstract: An on-demand electric power system for providing on-demand electric power in remote locations. The on-demand electric power system generally includes a protective housing, an engine-generator within the protective housing, a control switch electrically positioned between the engine-generator and an electric load, and a control unit in communication with the engine-generator and the control switch to control operation of the engine-generator along with electrical power to the electric load. The control unit detects when electrical power is required by an electric load and then first starts the engine-generator. After a period of time, the control unit then closes the control switch to provide electrical power to the electric load.

Abstract: A dual-generator assembly includes a first generator configured to generate a first current and a second generator configured to generate a second current modulated based on harmonic current in the first current.

Abstract: An adaptive sliding-frequency triggering ignition method for electronic ballast of high pressure gas discharge lamp includes the steps of: measuring an accurate value of free oscillation frequency of the ballast load loop by using a single-chip before sliding-frequency triggering ignition, implementing safe and reliable sliding-frequency triggering ignition after calculating the initial frequency and ending frequency of sliding-frequency triggering ignition according to the accurate value. The method can safely and reliably finish sliding-frequency triggering ignition course, thus improving the parameters such as the quality, life of the high pressure gas discharge lamp electronic ballast.

Abstract: An approach for converting a synchronous generator to a synchronous condenser is disclosed. In one aspect, a variable frequency driver is used to provide a starting power source to accelerate a synchronous generator decoupled from a turbine to an operational speed to act as a synchronous condenser. In another aspect, the synchronous condenser can be recoupled back to the turbine to form the synchronous generator.

Abstract: This invention relates to a method of controlling torque oscillations in a mechanical drive train of an electrical generation system which provides electrical power to an isolated electrical network, the method including the steps of: a. monitoring for changes in the electrical condition of the electrical network; b. determining whether a change in the electrical condition of the network falls within a predetermined range; c. adjusting the power in the network using an auxiliary power source when the electrical condition of the network falls within the predetermined range so as reduce or substantially prevent the build up of torque oscillations in the mechanical drive train.

Abstract: A generator set including a prime mover, a generator coupled to the prime mover, and a controller that is associated with a temperature controlled space and operates the generator set in one of a start/stop mode and a continuous mode depending on a demand defined at least in part by contents within the temperature controlled space.

Abstract: A Gen-Set (10) control system is disclosed. The control system has an engine (12) having a desired operating range and a generator (14) driven by the engine to produce an electrical power output. The control system also has an engine control module (30) communicatively coupled with the engine, and configured to change and operating parameter of the engine based on a load command before a load on the engine causes the engine to deviate from the desired operating range. The control system further has an automatic voltage regulator (32). The automatic voltage regulator is configured to monitor at least one of a voltage output, a current output, and a power factor of the generator and generate the load command based on a change in at least one of the voltage output, the current output, and the power factor. The automatic voltage regulator (32) is also configured to deliver the load command to the engine control module (30).

Abstract: A control system for a combined power generation and metallurgical plant facility integrates generator-side and load-side control to provide coordinated operation of the two processes. The power generation facility includes one or more generator units and the metallurgical plant facility includes one or more controllable loads. Operating characteristics of the one or more loads are fed back to the one or generator units through a master controller to determine input control parameters for the one or more generator units. Similarly control signals and operating characteristics of the one or more generators are fed forward to the one or more loads through the master controller to determine input control parameters for the one or more loads. Using feed-forward as well as feed-back loops to exchange generator output and load set-point information, power balance between the generator units and controlled loads is maintained within an operating envelope.

Abstract: A position sensorless control methodology for an electrical machine is provided. In particular, one aspect provides a method for position sensorless operation of an electrical machine using direct position error computation from stator flux observation results and stator current measurement.

Abstract: A system and method are provided for controlling the speed of a motor driving a load that is electrically connected to a generator driven by an engine, through use of a first control feedback loop configured to control the rotor flux of the motor by controlling the field excitation of the generator, and a second control feedback loop configured to control the speed of the motor by controlling the throttle position of the engine.

Abstract: A method for operating a wind turbine when a grid fault with a voltage drop occurs. The turbine has a rotor with a rotor blade having an adjustable blade pitch angle, a generator connected to the rotor for generating power for a power grid and a converter connected to the generator and the power grid. The grid fault is identified and a present value of a turbine variable representing a power is detected and a hold setpoint for the variable representing a power of the turbine is preset. A maximum and/or minimum permissible setpoint for the variable of the turbine is determined. The setpoint is increased or reduced once the hold time has elapsed. The turbine is driven with a setpoint preset which corresponds to the rotational speed. A presetting of the maximum permissible setpoint is ended when the rotational speed-dependent setpoint is lower than the maximum permissible setpoint.

Abstract: An electromagnetic motor having a frame, and at least one disc rotatably mounted to the frame. At least one permanent magnet is mounted on the disc, and at least one electromagnet is mounted to the frame in magnetic proximity to the at least one permanent magnet. A battery is electrically coupled to the motor for powering the at least one electromagnet. A switch controls electrical power between the battery and the at least one electromagnet, and a sensing means is provided for controlling the switch to activate the at least one electromagnet with respect to the at least one permanent magnet to cause the at least one disc to rotate. Preferably, a generator is mechanically coupled to the motor and electrically coupled to the battery for generating electrical power to the battery, and a renewable energy source such as a photovoltaic cell is electrically coupled to the motor to supplement any net electrical loss.

Abstract: Embodiments herein relate to an arrangement and method for improving the performance of a safety-critical vehicle actuator, in particular a safety-critical vehicle actuator powered directly or indirectly from a vehicle electrical system. The safety-critical vehicle actuator is arranged to, upon activation thereof, signal to an alternator of the vehicle to output a raised voltage for a pre-determined time period.

Abstract: A device includes a rotor and a stator with coils arranged to form a phase element. The phase element includes a first coil group including a first coil and a second coil and a second coil group including a third coil and a fourth coil, where the rotor is positioned between the first coil group and the second coil group. The device also includes one or more switches that enable reconfiguration of the phase element by switching an electrical configuration of the coils. In a first mode, the coils are arranged with the first coil in a first coil path and the second coil in a second coil path that is coupled in parallel with the first coil path. The coils are arranged such that a voltage generated across the first coil path is substantially equal to a voltage generated across the second coil path.

Abstract: This invention discloses a power control system comprising a prime mover and a generator driven by the prime mover. A control device is coupled with the generator to ascertain a change in speed of the generator and vary an output power of the generator according to the change. The control device applies a signal to reduce the generator output power and another signal to restore the generator output power. The power control system may include a transmission, a speed converter, and/or an accessory.

Abstract: Method for controlling at least one adjustment mechanism of a wind turbine, said method comprising the steps of: establishing at least one load or operational value of the wind turbine, choosing a combination of at least two control strategies from a set of different control strategies based on the established at least one load or operational value, and applying the chosen combination of control strategies to control said at least one adjustment mechanism. The invention also relates to a wind turbine and a wind park.

Abstract: A system provides generator control for a power system within a vehicle. The system includes a battery, a generator that outputs power to charge the battery. A sensor detects a state of charge (SOC) value, a health value, a voltage, a current, a temperature, and a charging voltage of the battery. A controller controls a voltage output mode of the generator in response to at least one of a state of charge (SOC) value, a health value, a voltage, a current, a temperature, and a charging voltage of the battery detected by the sensor, the voltage output mode is in response to the SOC and the temperature of the battery.

Abstract: A generator set including a prime mover, a generator coupled to the prime mover, and a controller that is associated with a temperature controlled space and operates the generator set in one of a start/stop mode and a continuous mode depending on a demand defined at least in part by contents within the temperature controlled space.

Abstract: An electrical machine has been developed that opportunistically regulates the voltage supplied to the coil of the electrical machine. The electrical machine includes a stator winding, a rotatable electromagnet, and a voltage regulator. The voltage regulator is configured to control an output voltage of the electrical machine. The regulator is configured to vary the magnitude of the output voltage based at least in part on acceleration of the vehicle.

Abstract: A vehicle drive mechanism includes a power transmission mechanism which has a rotary electric motor and a gear mechanism for transmitting mechanical power from the rotary electric motor to a drive shaft disposed coaxially with an output shaft of the rotary electric motor, and a control unit formed of a plurality of elements and controlling an operation of the rotary electric motor. At least one of the elements which constitute the control unit is disposed on a periphery of at least one of the rotary electric motor, the drive shaft, and the gear mechanism.

Abstract: A fault tolerant generator apparatus includes subsystems isolated from each other, so that the generator may operate in a fault mode with low torque ripple. The apparatus comprises a machine and a power controller unit. In an embodiment, the machine has a plurality of electrical three phase windings and the power controller unit has a plurality of power converters. Each three phase winding of the machine is coupled to a separate corresponding power converter to form an operating subsystem. The operating subsystems are physically and electrically isolated from each other to provide fault tolerant operation of the apparatus. Accordingly, each of the operating subsystems is effective to provide a balanced electrical load for the machine.

Abstract: A power generation control apparatus of a rotating electrical machine for a vehicle is obtained which achieves load response control in a plurality of electric power generation control modes even if a generation voltage final target value rapidly changes. The apparatus includes a power control unit 103 and a storage battery 104 connected to a rotating electrical machine 102, and a rotation speed detection part 105 for detecting a rotational speed Na. The power control unit 103 controls power generation in a first mode when the rotational speed Na during operating as a generator is less than or equal to a predetermined value, and controls power generation in a second mode when the rotational speed Na is higher than the predetermined value.

Abstract: An electric motor comprising a stator having two coil sets arranged to produce a magnetic field of the motor, each coil set comprising a plurality of coil sub-sets; and two control devices, wherein the first control device is coupled to the plurality of coil sub-sets for the first coil set and the second control device is coupled to the plurality of coil sub-sets for the second coil set and each control device is arranged to control current in the respective plurality of coil sub-sets to generate a magnetic field in each coil sub-set to have a substantially different magnetic phase to the other one or more coil sub-sets in the respective coil set; and wherein the first control device and the second control device are mounted adjacent to the stator.

Abstract: An aircraft starting and generating system includes a starter/generator that includes a main machine, an exciter, and a permanent magnet generator. The system also includes an inverter/converter/controller that is connected to the starter/generator and that generates AC power to drive the starter/generator in a start mode for starting a prime mover of the aircraft, and that converts AC power, obtained from the starter/generator after the prime mover have been started, to DC power in a generate mode of the starter/generator. The exciter includes a stator and a rotor, and wherein the exciter rotor includes a three-phase AC winding.

Abstract: A method of coupling a mechanical power source through an electrical power generator to an electrical load is disclosed. A characteristic of an electrical output is measured from the electrical power generator produced during a power generation cycle during which there is a coupling of the mechanical power source through the electrical power generator to the electrical load. The coupling of the mechanical power source is adjusted through the electrical power generator to the electrical load during a subsequent power generation cycle based at least in part on the measured characteristic of the electrical output.

Abstract: An electric power generating system connectable to a reconfigurable power distribution network, and wherein a number of alternators, driven by internal combustion engines running at different speeds ?1, ?2, . . . , ?n, supply alternating voltages to rectifiers (14) generating rectified voltages V(r1), V(r2), . . . , V(rn) which are maintained substantially equal.

Abstract: A wind energy converter has a generator adapted to be coupled directly to a wind turbine without need for a mechanical gear unit. A rectifier is coupled to the generator and a converter is coupled to the rectifier to provide a regulated DC bus voltage as a function of a controlled duty cycle. An inverter is coupled to the converter for providing a regulated AC output to a load.

Abstract: An output voltage regulator for an engine-driven generator that can satisfactory suppress fluctuation in output voltage, even when an output waveform of the generator is distorted. An engine revolution period that represents a period of output voltage is detected by use of an ignition signal. Data that represents an output waveform is obtained by squaring and adding up an instantaneous value of the output voltage for one period of engine revolution. Furthermore, a square root of the data is extracted as an effective value. An operation duty of a transistor Q1 provided in an output circuit of an excitation winding L2 that supplies a field current “if” is determined based on a difference between the effective value and a target voltage. The field current “if” changes according to the difference, and the output voltage is thereby regulated according to a load.

Abstract: Compensator device, for the stabilisation of electromechanical oscillations destined to provide a reference signal to a voltage regulator device of a synchronous alternator for the delivery of electrical power to a distribution network, said device including: first processing means to receive electrical measurement signals representing operative parameters characteristics of said synchronous alternator and/or to generate an electrical signal to be controlled; and a first electrical signal corresponding to a sliding surface of a control of the “sliding modes” type, second processing means of the first signal to generate the reference signal so that it has a first order “sliding modes” profile.

Abstract: Power balancing techniques for a synchronous power generation system are provided. One exemplary method for balancing power in a synchronous generator system includes determining an output power characteristic of a synchronous generator driven by a prime mover and comparing the characteristic to a value derived from the output power of a plurality of synchronous generators. The method also includes providing a correction signal to the synchronous generator to modify the output power produced by that generator. A synchronous power generation system having a plurality of synchronous generators driven by a common prime mover is also provided.

Abstract: An integrated circuit for controlling an alternator circuit in an alternator regulator charging system. The integrated circuit includes a first circuit for performing core regulation functions; a second circuit having a mask selectable operation circuit that allows the integrated circuit to select an operational mode thereof, the mode being selectable from one of a stand-alone mode, a remote controlled mode wherein the first circuit is controlled by an external circuit, and a combination of the stand-alone mode and the remote controlled mode; and a third circuit having an output driver circuit for controlling a field winding of the alternator circuit.

Abstract: An aircraft starting and generating system includes a starter/generator that includes a main machine, an exciter, and a permanent magnet generator. The system also includes an inverter/converter/controller that is connected to the starter/generator and that generates AC power to drive the starter/generator in a start mode for starting a prime mover of the aircraft, and that converts AC power, obtained from the starter/generator after the prime mover have been started, to DC power in a generate mode of the starter/generator. The exciter includes a stator and a rotor, and wherein the exciter rotor includes a three-phase AC winding.