Abstract: A climate control system for use in a transport vehicle is disclosed. The climate control system includes a variable speed electric load, a controller configured to determine a load of the variable speed electric load, and a battery pack voltage configurator circuit. The battery pack voltage configurator circuit includes a first battery bank providing a first voltage and a first current, a second battery bank providing a second voltage and a second current, and a plurality of switches. The controller is configured to control the plurality of switches based on the determined load of the variable speed electric load. The battery pack voltage configurator circuit is configured to provide an output voltage and an output current to drive the variable speed electric load. The output voltage and the output current vary in magnitude based on the control of the plurality of switches.

Abstract: Aspects of a local lagged adapted generalized method of moments (LLGMM) dynamic process are described herein. In one embodiment, the LLGMM process includes obtaining a discrete time data set as past state information of a continuous time dynamic process over a time interval, developing a stochastic model of the continuous time dynamic process, generating a discrete time interconnected dynamic model of local sample mean and variance statistic processes (DTIDMLSMVSP) based on the stochastic model, and calculating a plurality of admissible parameter estimates for the stochastic model using the DTIDMLSMVSP. Further, in some embodiments, the process further includes, for at least one of the plurality of admissible parameter estimates, calculating a state value of the stochastic model to gather a plurality of state values, and determining an optimal admissible parameter estimate among the plurality of admissible parameter estimates that results in a minimum error among the plurality of state values.

Abstract: A generator system may include two or more generators electrically connected through a generator bus. A controller receives operation data from a first generator. The operation data may describe a power flow from a second generator to the first generator. From the operation data, either a loss of speed control or a loss of voltage control may be identified at the second generator. The controller may generate a command for the second generator based on the loss of speed control or the loss of voltage control.

Abstract: A method of performing a charging function by using different types of energy sources and an electronic device thereof are provided. The electronic device includes different types of circuits configured to acquire different types of energy sources, and a processor configured to determine an energy source for charging among the different types of energy sources based on respective current values for the different types of energy sources, and control the determined energy source for charging so as to be used in battery charging of the electronic device or in a system operation of the electronic device.

Abstract: An electrical cogeneration system and AC coupling method for efficiently distributing power from multiple AC sources. The system includes a main AC source, an AC generator, a solar panel, and an automatic transfer switch. The main AC source and the AC generator are connected to the transfer switch. The system also includes a DC/AC inverter, which is in communication with the solar panel. The transfer switch and the inverter are both connected to a common AC load panel where the power provided by the solar panel, the AC generator, and the main AC source is used to satisfy a common electrical load. The system further includes a system control device that is in communication with the inverter and the transfer switch and is capable of selectively determining power input to the AC load panel. An AC coupling method for distributing power from multiple AC sources is also provided.

Abstract: A power supply device is connected to an external power supply and supplies electric power to a load. The power supply device includes a battery terminal that is used to connect a secondary battery, a superposition unit that superposes second electric power output from the secondary battery on first electric power supplied from the external power supply, and that outputs resultant electric power to the load; a power consumption amount retrieve unit that retrieves a power consumption amount of the load; and a controller that controls an amount of the second electric power to be output from the secondary battery, based on the power consumption amount.

Abstract: An electrical cogeneration system and AC coupling method for efficiently distributing power from multiple AC sources. The system includes a main AC source, an AC generator, a solar panel, and an automatic transfer switch. The main AC source and the AC generator are connected to the transfer switch. The system also includes a DC/AC inverter, which is in communication with the solar panel. The transfer switch and the inverter are both connected to a common AC load panel where the power provided by the solar panel, the AC generator, and the main AC source is used to satisfy a common electrical load. The system further includes a system control device that is in communication with the inverter and the transfer switch and is capable of selectively determining power input to the AC load panel. An AC coupling method for distributing power from multiple AC sources is also provided.

Abstract: An overvoltage suppression device which suppresses overvoltage that occurs when breakers which turn on/off the connection between a power source bus and a power transmission line, are turned on after the breakers are turned off. The overvoltage suppression device measures the waveform of voltage on the side of the power source and the voltage on the side of the power transmission line, and extracts the waveform of a component in a predetermined frequency band on the basis of the waveform obtained by multiplying the wave shape of the voltage on the side of the power source by the waveform of the voltage on the side of the power transmission line. The breakers are turned on on the basis of a cycle wherein the waveform is peaked.

Abstract: A method and apparatus for an electrical bus leveling unit are provided. The electrical bus leveling unit includes a first power supply configured to generate electrical energy having a first set of electrical parameters and a power converter electrically coupled to said power supply. The power converter is configured to be coupled to an electrical bus couplable to a second power supply. The electrical bus leveling unit also includes a controller including a processor that is communicatively coupled to the power supply and the power converter The controller is configured to receive information relating to the operation of the electrical bus from a plurality of sensors, control an output of at least one of the power supply and the power converter to transfer electrical energy to the electrical bus when the second set of electrical parameters on the electrical bus is outside a predetermined range.

Abstract: This disclosure describes techniques for operating a corded electronic device in which a battery and a power control unit manage power draw from an external power source electrically coupled to the corded electronic device using a physical cord, such as a universal serial bus (USB) cable. The power control unit automatically supplements an electrical current continuously drawn by the corded electronic device from the external power source with an electrical current from the battery, when needed. Moreover, the power control unit operates to limit the current drawn from the external power source and the physical cord so as to ensure the current does not exceed any limitations or requirements associated with the external power source or the physical cord.

Abstract: A sequential shunt regulator switch system and method is disclosed. A power switch is controlled to switch a first current from a power source to an electrical bus. Further, a current controllable switch provides a controlled current from the power source to the electrical bus.

Abstract: A control unit of a system stabilization device uses a fluctuation detection block (60) to determine fluctuation components included in the active component and reactive component currents of a system current and fluctuation components included in the frequency signal and the amplitude signal of a system voltage. The high frequency cut-off of the fluctuation detection block (60) is set to be f1; the low frequency cut-off is set to be f2. The fluctuation detection block (60) is composed of a low-pass filter (61) with a time constant of T1, a low-pass filter (62) with a time constant of T2, a subtracter (63) which outputs the difference, between the output signals of the filter (61) and the filter (62), and a feedback circuit (64) which provides feedback on the output of the subtracter (63) to the filters (61, 62). Thus, stability is ensured without using a current detector.

Abstract: An apparatus and method for controlling an electrical stimulation system to increase the resolution of the stimulation region with multiple independent power source electrodes is proposed. In the apparatus, the electrode set contains at least three electrodes of which two adjacent electrodes are of the same power polarity to control the location of the composite stimulation signal and the others are of an inverse power polarity to balance the total power polarity and narrow the stimulation region. The method for the apparatus comprises steps of: receiving a target stimulation location and level, generating at least one parameter to adjust power settings of the electrodes, thereby obtaining a composite stimulation signal corresponding to a virtual channel of which a location and level match the target stimulation location and level.

Abstract: A semiconductor IC device capable of power-sharing includes a first power line configured to be supplied with a first power, a second power line configured to be supplied with a second power, a switching block configured to connect the first power line with the second power line in response to a first control signal, and a power-sharing control block configured to generate the control signal in accordance with a plurality of operation command signals.

Abstract: A dual-energy storage system is described, having two energy sources: (a) a fast-energy storage device (FES) such as an ultracapacitor, and (b) a long duration or steady power device, such as a fuel-cell or battery. A power converter or controller executes an energy management algorithm to determine when to provide bursts of additional power/current from the fast-energy storage device, and when to recharge the fast-energy storage device.

Abstract: A method and system of active power reserve regulation in a wind farm with a communication network having a plurality of wind turbines that provide an active power reserve in order to support eventual power grid contingencies and to deliver an increase of power in case it is needed.

Abstract: A semiconductor module has switching semiconductor elements connected in parallel to each other and at least a free wheeling semiconductor element reversely connected in parallel to the switching semiconductor elements. The free wheeling semiconductor element is placed between the switching semiconductor elements. At both end parts of the semiconductor elements, each of the switching semiconductor elements is placed. A longitudinal side of each of the switching semiconductor elements and the free wheeling semiconductor element is placed in parallel to a short side of the semiconductor module. An electric-power conversion device has a plurality of arms. Each arm is composed of the semiconductor elements.

Abstract: The present disclosure is a supplemental power system which may operate in conjunction with a power supply to provide supplemental power to a load. Supplemental power system may include a power storage device, a boost converter and a power storage charger. Supplemental power system may supply extra power required for a storage system load at startup whereby the power supply system may be sized for steady state operation of the load.

Abstract: A method and circuit to output adaptive drive voltages within information handling systems is disclosed. According to one aspect of the disclosure, a method of outputting power within an information handling system can include sensing a load current of a power output stage operable to employ more than one drive voltage level. The method can also include comparing the load current to a threshold current setting, and selecting a first output drive voltage from a plurality of input drive voltages in response to comparing the load current to the threshold current setting. The method can also include coupling the first output drive voltage to the power output stage.

Abstract: Method and apparatus are provided for controlling electrical current supplied to an electronic device, such as a computer system. The method includes drawing up to a predetermined amount of an electrical input current from a first current source, and supplying a first portion of the drawn electrical input current to the electronic device, wherein the amount of the first portion may change over time to supply the amount of electrical current demanded by the electronic device without exceeding the predetermined amount. A second portion is supplied to charge an energy storage device during a period that the first portion is less than the predetermined amount. The stored energy device is discharged, as needed, to supply supplemental electrical current to the electronic device. A power supply including an energy storage device, such as a rechargeable battery, may be used to carry out the method.

Abstract: The invention relates to an electrical emergency source device fitted on an aircraft, which comprises an energy source capable of outputting the power necessary for vital electrical loads (10) to operate correctly, wherein there are two types of these loads: first loads, that absorb a constant power with time, second loads, that absorb variable power with time. Wherein this device comprises: a power source (12) sized to output the average power absorbed by all loads, a power source (15) capable of supplying power peaks absorbed by the second loads, and wherein, since the power of several loads is reversible, the power of the said device is also reversible.

Abstract: A DC-DC converter for generating a stable output voltage and being applicable to a transient load fluctuation. The DC-DC converter detects an input current, and compares the input current with a rated current of an external power supply. The DC-DC converter controls a positive charging current that is supplied to a secondary battery in accordance with a consumption current of a load so that the input current does not exceed the rated current. The DC-DC converter further controls a negative charging current that is supplied from the secondary battery to the load when the load requires an input current exceeding the rated current.

Abstract: A vehicle electrical system includes at least one battery, at least one fan and a device for detecting a critical state in the vehicle electrical system. The fan is activated when a critical state of the vehicle electrical system is detected. In this context, use is made of the fan's ability to store mechanical energy in the form of inertias. The fan operates in a regenerative manner and electrically feeds the mechanically stored energy back into the on-board electrical system.

Abstract: A system and method for responding to abrupt load changes on a power system transfers an initial amount of power from an external power source to the AC power system through a secondary converter module; senses an abrupt load change occurring-on the AC power system; and transfers auxiliary direct current (DC) power to the secondary converter module.

Abstract: A method and a device for non-contact energy transmission from one or more medium-frequency current sources, whose medium frequencies may have deviations around fM, to one or more moving consumers via one or more transmission lines and from or via transformer heads, allocated to the moving consumers, having one or more downstream matching controllers for adjusting the power received from the transmission lines. The currents fed into a matching controller are brought together with the aid of a single switch, depending upon the power demand of the consumers connected to the matching controller. The switching frequency of the switch is selected as a fixed value from a 10%-wide tolerance band around 1/fM. The output voltages of a plurality of matching controllers are able to be parallel-connected via diodes for supplying a consumer.

Abstract: The present invention discloses an electrical power supply for providing electrical power to a load, the power supply comprising a plurality of energy storage elements each having a different operating characteristic and connected in an electrical circuit to the load, and a circuit element interposed between at least one of the storage elements and the load and operable to segregate the energy storage elements therefrom, the circuit element being selected to match supply of energy to the load to the characteristics of the storage elements.

Abstract: Methods and systems of providing power to a central processing unit (CPU) provide for enhanced surge protection and increased battery life. In one approach, an integrated circuit as a power output stage with an output node, and a voltage regulator coupled to the power output stage. The voltage regulator selectively switches the power output stage into a current ramp down mode based on detection of a voltage surge at the output node. The power output stage has an associated current ramp down rate. The CPU is coupled to the output node and a surge notification input of the power output stage, where the power output stage accelerates the current ramp down based on a notification signal from the CPU.

Abstract: Apparatus built-in backup power supply system has a “peak cut” function for sharing a part of the load current at the time of a peak load using a secondary battery. For this purpose, a two-way DC—DC converter 5 and the secondary battery 4 are installed on the DC output side of the AC-DC converter 3, and that portion of the load current that exceeds a predetermined peak cut level is discharged from the secondary battery 4 during peak loading. When the load is less than the predetermined cut level, the secondary battery 4 is charged from the AC-DC converter 3 via the two-way DC—DC converter 5. A suitable peak cut level is determined according to the state of charge of the secondary battery and load pattern, and is changed dynamically.

Abstract: A device for supplying voltage to an electrical machine, in particular a paper-processing machine, having a plurality of electric drives (11, 12, 21, 22, 32), electric drives (11, 12) of the same supply voltage being combined into one voltage level (14, 23, 33). The voltage supply device is characterized in that provision is made for a first DC voltage level (14) having electric drives (11, 12) as well as an electrical component (1, 13) for dissipating surplus electric energy, and provision is made for at least one second DC voltage level (23) which is connected to the first voltage level (14) via a bidirectional voltage transformer (2) and has further electric drives (21, 22), and one of the voltage levels (14, 23) is connected to the mains supply (4) via a voltage transformer (1).

Abstract: An energy generation network according to the present disclosure includes energy generating elements organized in a tree structure of superior and inferior system levels, with control systems and a communication network. In a currently preferred embodiment, energy generating elements are turbogenerators as described above. Communications and processing are distributed throughout the systems and sub-systems of energy generating elements. Inferior sub-systems and systems of sub-systems appears as a single unit to the superior system or sub-system level. Thus, the energy generating elements appears as a seamless single energy generating unit. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

Abstract: A working machine, such as an excavator, provided with a condenser, capable of satisfying condensing conditions required for various works, while minimizing the condensers and maintaining a light-weight. The working machine includes a generator and at a an electrically-operated actuator for generating power for operating a work member by electric power generated by the generator. Further, as for charging-discharging electric power, a plurality of kinds of condensers are provided, and the condensers used are selectively switched according to power required, work contents, or the like.

Abstract: A new method and apparatus for recursive parameter estimation which closely approximates actual values is taught. Briefly stated, the within invention estimates impedance parameters of network branches in both on-line and off-line modes, providing accurate estimation of branch parameters in the presence of noise in measurements and rejecting gross measurement errors, by use of a Kalman type Markov filter scheme using maximum likelihood estimation.

Abstract: A new method and apparatus for recursive parameter estimation which closely approximates actual values is taught. Briefly stated, the within invention estimates impedance parameters of network branches in both on-line and off-line modes, providing accurate estimation of branch parameters in the presence of noise in measurements and rejecting gross measurement errors, by use of a Kalman type Markov filter scheme using maximum likelihood estimation.

Abstract: Method for the storage and controlled supply of electric energy for discontinuous loads in steelworks and in particular for metal melting systems and rolling mills, the method comprising at least one main supply line (18) connected to a main supply source (11) of electric energy and a plurality of loads (12-13-14-114-20), whereby the level of maximum active power supplied by that main supply source (11) to the steelworks is limited by a sub-station (27) to a level "P.sub.0 " lower than the peaks of maximum absorption by those loads (12-13-14-114-20), the method comprising at least one accumulation line (16) connected in parallel to the main supply line (18) and supplying at least one storage assembly (17), which is connected to the loads (12-13-14-114-20) through a secondary supply line (19).

Abstract: A load current sharing circuit is disclosed that allows multiple independent power modules, either switching or linear, to be connected in a parallel configuration such that each module delivers only its proportionate share of the load current. Each module measures the common output voltage, compares that voltage to an internal reference voltage signal, and generates an error voltage signal to be used as feedback for regulating its output voltage. The internal reference voltage signal is a function of the extent to which the current within each module differs from the current of the module with the highest current. That module functions as the master, and all the other modules act as slaves. Each slave increases its share of the load current so as to asymptotically approach the load current of the master to within a preset offset voltage, while the load current of the master decreases.

Abstract: A low dissipation shunt or series regulator apparatus is described comprising dump switching means coupled in parallel to each power source, which dump switching means is arranged for being responsive to a control signal produced by comparator means arranged for comparing the level of the error signal with a respective reference level. Each power source has its output connected to the reference level input of the corresponding comparator through feedback circuit means in order to set two operation thresholds for the comparator, thereby allowing each dump switching means to switch cyclically between two states, a first state serving to short the corresponding power source and a second state serving to allow the power source to provide current to the load.