321 results about "Reserve power" patented technology

In a communications system, such as a Power-Over-Ethernet system, where power supply equipment (PSE) supplies power to powered requiring devices (PRDs), a system and method of dynamic power management is implemented. The system and method monitors the power consumed at each port by the PRDs. Based on this monitoring, the PSE dynamically determines the minimum power which can be allocated to each PRD, and so dynamically maximizes the available reserve power. The PSE maintains a queue or queues wherein PRDs are listed in order of a power allocation priority. When additional power is available, the PSE preferentially allocates power to a PRD or PRDs which have higher priority. The system and method of the present invention minimizes the power allocated to each individual network device, as a result of which the total number of network devices that can be supported with the available power may be maximized.

A network of collection, charging and distribution machines collect, charge and distribute portable electrical energy storage devices (e.g., batteries, supercapacitors or ultracapacitors). Locations of collection, charging and distribution machines having available charged portable electrical energy storage devices are communicated to or acquired by a mobile device of a user, or displayed on a collection, charging and distribution machine. The locations are indicated on a graphical user interface on a map on a user's mobile device relative to the user's current location. The user may use their mobile device select particular locations on the map to reserve an available portable electrical energy storage device. The system nay also warn the user that the user is near an edge of the pre-determined area having portable electrical energy storage device collection, charging and distribution machines. Reservations may also be made automatically based on information regarding a potential route of a user.

A memory device and techniques for its operation are presented. After operating on power received from a host, the memory device determines that it is no longer receiving host power and, in response, activates a power source on the memory device itself. Using this reserve power, the memory device can then perform data management operations. The techniques can also be applied to a digital appliance having a non-volatile memory. The memory device or digital appliance can prioritize its memory management operation during the host / user operating window based on the ability to perform these operations outside of the host / user operating window. Additionally, in a data write operations, where the memory device receives data from a host, stores the data in volatile memory, and then writes the data into the non-volatile memory, the memory device sends the host an acknowledgment of the data having been written into the non-volatile memory after it has been store in the volatile memory, but before the write into the non-volatile memory is complete.

There is disclosed apparatus and methods for providing a reserve power source for a ventricular assist device. In an embodiment, the apparatus includes a primary power source for powering the device, and a controller housing having a reserve battery for powering the device when the primary power source provides inadequate power, and the controller housing configured for use externally of the patient with a percutaneous cable to the device. In another embodiment, a method includes powering the device with a primary power source, monitoring power provided to the device, powering the device when the power is monitored as inadequate to the device with a reserve power source disposed within a controller housing, the device disposed subcutaneously within a patient, the controller housing disposed externally of the patient, and the device and the controller housing connected by a percutaneous cable. Other embodiments are also disclosed.

An embodiment of the present invention discloses using an on-board microcontroller typically found on a control board or power supply board to momentarily toggle a switching mode power supply off and on. In one embodiment, the power consumption of the circuit is lowered by allowing the power supply and other circuit components to shut down while using a capacitor to provide reserve power to the microcontroller. In another embodiment, the microcontroller is also placed in a low power consumption mode for a predetermined period of time, which decreases the power requirement of the microcontroller and effectively lengthens the amount of time the other circuit components can be shut down. As described herein, this circuitry required to achieve this lower power state is minimal in comparison to known systems and, in one embodiment, requires an optoisolator (or alternatively, a transistor), a resistor and a capacitor.

An uninterruptible power supply (“UPS”) is provided with a backup power supply that has an adjustable reserve power level that is based on a user's input and / or is configured to notify a user if a battery included in the UPS needs to be replaced. In one embodiment of the present invention, the UPS (or a circuit included therein) estimates a remaining life (ERL) of the battery by considering various battery conditions, including, but not limited to, a predetermined battery life expectancy, whether the battery is being used to power a load, and battery temperature. If it is estimated that the ERL is low, or below a predetermined threshold, then the UPS (or a circuit included therein) is configured to notify a user that the battery needs to be replaced.

A method of power output level control for a hybrid powertrain system includes the step of checking if there is a predetermined level of energy stored in a energy storage apparatus. The method further includes the step of checking if there is a predetermined level of power available if there is a predetermined level of energy. The method also includes the step of reserving a predetermined power level amount from the energy storage apparatus if there is power available. The method includes the step of determining if a predetermined enabling condition is met and releasing the reserved power level amount if the predetermined enabling condition is met.

A method and apparatus for mobile terminal power management is provided in this invention, which belongs to communication field. The method comprises: obtaining a reserving condition and power consumption per unit time of an application requiring power reservation, the reserving condition comprising a reserving time; according to the reserving condition and the power consumption per unit time, calculating an amount of power required to be reserved for the application; and reserving power for the application according to the amount of power required to be reserved for the application. The apparatus comprises: an obtaining module, a calculation module, and a power reservation module. Through calculating an amount of power required to be reserved during a reserving period of time for the application requiring power reservation, this invention can guarantee the use of an important application or application of priority as selected by a user.

A power management and load shedding method and system comprises the steps of:a) Calculating a reserve power, RP as:RP=APT−APh−GPT where APT is a total generation capacity of a plurality of running generators in a power system, APh is a highest capacity of any one of the running generators, and GPT is a total current generated power from the running generators;b) if the reserve power, RP, is negative, generating a load shedding list identifying one or more loads of the power system to be shed substantially simultaneously, such that a total power consumption of the loads in the load shedding list is equal to or greater than a deficit in the reserve power, RP;c) storing the load shedding list in a buffer;substantially continuously repeating steps a) to c); andshedding the loads identified in the load shedding list stored in the buffer on detection of a failure of any one of the generators.

A fabric power panel insert for brief cases, backpacks and other luggage embedding a controller, battery pack, AC adapter, retractable power cord, a computer connector cord, 5 volt USB port and wires with connectors linking components. The fabric power pack provides a power system that enables the user to recharge both the mobile device batteries and the backup battery pack at the same time with one retractable power cord and AC adapter and then use the backup battery pack to provide reserve power for those mobile devices when the mobile device batteries lose their power. All of the components are embedded in the panel within fabric pockets that hold each component in a specific location with elastic straps and fabric tie downs. The panel is then inserted into the case and secured by hook and loop straps to hold it in the case.

A method and apparatus are provided for operating a wireless communication device. The method includes the steps of providing a plurality of battery powered modules that are carried by a user and together operate as the wireless communication module (ensemble), detecting a battery reserve power level of a first module of the plurality of modules and transferring a processing function from the first module to a second module of the plurality of modules based upon the detected battery reserve power.

The invention discloses a bus capacitance discharging system for an electric automobile and a control method of the bus capacitance discharging system. The system comprises a reserve power supply, a switch, a discharging resistor, a controller and a power conversion module. The positive electrode of the reserve power supply is connected with the positive electrode of a high-voltage bus, and the negative electrode of the reserve power supply is connected with the negative electrode of the high-voltage bus. The first end of the switch is connected with the reserve power supply; one end of the discharging resistor is connected with the second end of the switch, and the other end of the discharging resistor is connected with the reserve power supply; when it is detected that power failure happens to the high-voltage bus, the controller is used for controlling the switch to be switched off so as to discharge capacitance in the bus capacitor by discharging resistance, and after the high-voltage bus is powered on, the switch is controlled to be switched off; and the power conversion module is connected with the reserve power supply and controller so as to supply power to the controller. The bus capacitance discharging system has the advantages of being short in discharging time, safe and reliable in discharging process, and easy and precise in control, and is low in cost. In addition, the system has the autodiagnosis function, and controllability and knowability of discharging can be improved.

The invention relates to a method and a system for randomly switching alternating current. The system comprises a voltage detecting circuit, a current detecting circuit, a first switching circuit, a second switching circuit, a control circuit, a pulse width modulator (PWM) and an APFC circuit, wherein the first switching circuit is used for switching on or off a main power supply; the second switching circuit is used for switching on or off a reserve power supply; the control circuit is used for controlling the first switching circuit and the second switching circuit to switch on or off and transmitting a pulse signal to the PWM; the PWM is used for modulating an output dutyfactor according to the pulse signal transmitted by the control circuit; the APFC circuit is used for receiving the output dutyfactor of the PMW so as to control the output current, and thereby the linear rectification of the output current is realized to ensure the synchronization of the output voltage and the current phase of the APFC circuit. The state of the power supply can be automatically recognized by adopting the random switching so as to adapt to power supplies in different environments, and the switching time is greatly reduced and fixed. The current linear rectification can be randomly switched as alternating current to solve the peak interference brought by the random switching, and the power compensation is carried out to realize the minimum loss of circuit power.

A method for primary regulation of a combined gas and steam turbine installation in network operation, wherein the combined gas and steam turbine installation includes a gas turbine and a steam turbine arranged along at least one shaft includes operating at least one steam turbine actuating valve on a restricted basis along a working steam supply line to at least one pressure stage of the steam turbine so as to provide a steady-state steam turbine reserve power, wherein the at least one steam turbine actuating valve is changed to a less restricted state if a network frequency decreases so as to require network frequency support.

The invention discloses a primary frequency modulation control method and system for a photovoltaic power station based on multi-master station coordination control. The method comprises the steps that the active power of the grid-connected point of the photovoltaic power station is collected in real time; since AGC load shedding control reserves power reserve capacity for the photovoltaic power station, the active power of the grid-connected point of the photovoltaic power station is active power Pref when the photovoltaic power station has the load shedding level described in the description; when the grid frequency exceeds the artificial dead zone DB disturbance of primary frequency modulation, a PFC control system calculates the active power variation delta P after frequency fluctuation, and the target value Pset=Pref+ delta P is given to the active power issued to an inverter group; and the active power of the photovoltaic power station is changed to achieve primary frequency modulation. The scheme simply needs to upgrade the algorithm of the control software of a conventional photovoltaic power station inverter, and adds a PFC master station coordination mechanism based on the existing AGC function of the power station, so as to realize multi-master station coordination control of AGC and PFC. Cost can be maximized. The primary frequency modulation function of the photovoltaic power station is used to speed up the frequency recovery of a grid.

Systems, methods and apparatus are provided for limiting power consumption in a wireless communication device. The described aspects provide for power limiting thresholds to reserve power for, or limit power usage by, one or more predetermined applications executable by the wireless communications device. The described aspects are highly user-configurable, allowing a device user and / or a third party to define which applications have a battery power consumption limit or reserve, and the amount of battery power associated with the limit or reserve.

A wind power plant, including a generator driven by a rotor in order to generate electrical power and a controller that includes a pitch module for adjusting a pitch angle of blades of the rotor. The controller has an input for a required power reserve and determines a target pitch angle depending on an operating point of the wind power plant. A secondary pitch controller is also provided, which includes a detector for available power and a dynamic offset module. Input signals for the available reserve power determined by the detector, the required reserve power and the generated electrical power are applied to the dynamic offset module, which is designed to determine a value for a pitch angle offset. An activation element varies the target pitch angle by the pitch angle offset.

A demand-supply planning device includes: a power demand predicting unit that predicts power demand; an expected rebate value predicting unit that calculates an expected profit value per unit amount of reduced power based on an occurrence probability of a demand response and a rebate value to be acquired through the demand response; and an optimal operation plan creating unit that sets an addition result of a first cost for power purchase, a second cost for power generation in power generators and storage batteries, and a multiplication result of the expected profit value and reserve power, which is an amount of power capable of being further generated by the power generators and the storage batteries after an amount of power supplied satisfying the power demand is generated, as an evaluation function and determines an operation plan of the reserve power and the power generators and the storage batteries.

A method for operating a photovoltaic system with a plurality of photovoltaic modules and with a DC motor connected to the photovoltaic modules is proposed. The motor shaft of the DC motor is coupled to a generator shaft of a three-phase generator, wherein the three-phase generator can be connected to a power grid. The motor shaft of a second DC motor can also be connected with the generator shaft, and the electric energy produced by the photovoltaic modules is initially only used for driving a single DC motor and is during the subsequent operation divided between those DC motors. A battery is provided which can be connected with the second DC motor instead of the PV system by changing the excitation of the second DC motor such that it's motor voltage corresponds to the open-circuit voltage of the battery.

The invention provides a transmitting power control method and device, equipment and a storage medium. The transmitting power control method is applied to terminal equipment. When there is transmission overlap between uplink carriers in at least two PUCCH (Physical Uplink Control Channel) groups in the time domain, the terminal equipment obtains the minimum reserved power of each PUCHH group according to the transmission time and / or transmission content. During the transmission of uplink information, the uplink information is transmitted after performing power reduction on the uplink carriersof each PUCCH group according to the maximum transmitting power and the minimum reserved power of the uplink carriers of each PUCCH group. The transmission power of the uplink carrier after the powerreduction cannot be less than the minimum reserved power. If the power of an overlapping part of the uplink carriers of the first PUCCH group is less than the minimum reserved power thereof, information of the overlapping part of the uplink carriers of the first PUCCH group is discarded. The transmitting power control method solves a problem of transmission power allocation in the PUCCH groups under a low delay condition.

The invention discloses an efficient electric power cabinet dehumidification device. The efficient electric power cabinet dehumidification device comprises a cabinet body, wherein a heat radiation cabin is arranged at the back part of the cabinet body; a heat radiation fan is mounted in the inner cavity of the heat radiation cabin; a drying layer is arranged on the inner wall of the cabinet body and at a part corresponding to the position of the heat radiation cabin; a heating net is mounted in the middle of the drying layer; a plurality of temperature sensors are arranged on the inner wall of the cabinet body; and the temperature sensors are electrically connected with a control panel. Through the mutual matching of the drying layer and the heat radiation fan, humid air in the cabinet can be dried so that the humid air is prevented from reflowing; the heating net is arranged in the middle of the drying layer so that a drying agent in the drying layer can be used for a plurality of times and does not lose effect; a powerless draught fan at the top of the cabinet body and a wind motor arranged at the bottom are mutually matched, so that power can be supplied to electric appliances in a whole process and a reserve power supply also can be provided; and meanwhile, the powerless draught fan also can be used for exchanging air in the cabinet body.

The aim of the invention is to improve a method for the primary control so that reserve power that is practically completely available for the effective frequency boost within seconds is available also in the stem turbine part of a gas / steam turbine installation. To this end, the pressure stage is operated with a control valve (6, 7, 8) that is throttled to such an extent that a frequency boost power reserve is built up. Said power reserve is used for frequency boosting in the event of an underfrequency by correcting the desired value depending on the underfrequency. Said corrected value corresponds to an effective area of the flow that is increased vis-â-vis the throttled condition of the control valve (6, 7, 8) and acts on the effective area of flow of the control value (6, 7, 8) with an impressed signal that approaches zero after a predetermined time. Said signal is chosen in such a manner that, despite the correction of the desired value, a stable operative condition is maintained in accordance with the response behavior of the gas / steam turbine installation to the increased effective area of flow.

The invention discloses a device and a method for protecting sensitive information of a chip system. The device comprises a clock input module, a detection module, an OR-gate circuit, a signal setting device, a switch, a discharging resistor, a reserve power supply and a storage. The storage stores the sensitive information, and the detection module performs timing completeness detection on temperature, voltage, frequency, light intensity and physical deformation of the chip system to guarantee safety operation of the chip system. When the chip system is attacked and abnormity of the chip system is detected, the OR-gate circuit generates a high level signal; after receiving the high level signal, the signal setting device controls the power input end of the storage to be disconnected from the reserve power supply, and controls the power input end of the storage to be connected with one end of the discharging resistor to form a discharging access between the storage and the ground, so that sensitive data in the storage are cleared away quickly and sensitive information is not stolen by an attacker due to quick clearing.

The invention discloses a distribution network terminal power supply device which comprises a power supply filter circuit, a high-frequency full-bridge inversion circuit, a high-frequency transformer, a rectification filter circuit, a sampling circuit and a digital signal processor, wherein the power supply filter circuit, the high-frequency full-bridge inversion circuit, the high-frequency transformer, the rectification filter circuit, the sampling circuit and the digital signal processor are connected in sequence, and the digital signal processor is connected with the high-frequency full-bridge inversion circuit and the sampling circuit. An impulse waveform-shaped duty ratio which is output by the high-frequency full-bridge inversion circuit is changed by the digital signal processor to control output of sampling values, safety of power supply control is improved, and size of the distribution network terminal power supply device is reduced. In addition, a reserve power supply is accessed to meet use requirements of a power supply under various installing environment and prolong working time of the distribution network terminal power supply device when power is off. Therefore, the distribution network terminal power supply device supplies power for a distribution network terminal, adapts to wide input power supply range, and is strong in power grid adaptability.

The invention relates to the technical field of electronic equipment, in particular to a power supply switching circuit. A switch composed of a field-effect tube is controlled by branch voltages of main power supply voltages, a voltage-regulator diode is arranged as a protection unit, a low break-over voltage low-loss diode separates a main power supply from a reserve power supply, the circuit is simplified while the main / reserve power supply is rapidly switched, and the process cost is reduced; and simultaneously, and damages to power apparatuses caused by charging between the main power supply and the reserve power supply are prevented effectively by using the low break-over voltage low-loss diode while the switch is protected for the protection unit.