170results about How to "Improve power reliability" patented technology

The present invention provides a highly reliable electric power converter reduced in parasitic inductance.

An electric power converter that includes a capacitor module which has a DC terminal, an inverter which coverts a direct current into an alternating current, and heat release fins which cool the inverter, is constructed so that: the inverter has a power module including a plurality of power semiconductor elements; the power module further has a metallic base, a dielectric substrate provided on one face of the metallic base, a power semiconductor element fixed to the dielectric substrate, and a DC terminal; the metallic base has the heat release fins on the other face; the DC terminal in the power module and the DC terminal in the capacitor module are each formed by stacking flat plate conductors via an insulator; the two positive and negative DC terminals have respective front ends bent in opposite directions; a plane including the bent sections is used as a surface for connecting the power module and the capacitor module; and the insulators overlap each other at the connection surface.

The invention relates to an intelligent home system accessing to an intelligent power gird and new energy and an energy efficiency managing method. The system comprises a bus and an intelligent interaction terminal, wherein the bus is provided with an electric supply input end and a new energy input end, the electric supply input end is serially connected with an electric supply accessing switch and an intelligent electricity meter, the input end of the intelligent electricity meter is accessed to an optical cable compound cable and the output end is connected to the bus through the electric supply accessing switch; the new energy input end is connected with corresponding new energy equipment through the corresponding new energy accessing switch; the intelligent interaction terminal comprises a microprocessor and a peripheral interface circuit thereof, the intelligent interaction terminal is connected with the new energy equipment through an RS485 interface and an acquisition device used for acquiring information of the intelligent electricity meter; and the intelligent interaction terminal is in wireless communication connection with the electric supply accessing switch and the intelligent home equipment through wireless radio interfaces, wherein the electric supply accessing switch is provided with a corresponding wireless interface. The intelligent home system realizes dual-direction interaction of users and a power grid, can receive various kinds of information from the power grid and preferential measures in real time through the intelligent interaction terminal of the intelligent electricity meter, guides the users to optimize home electricity and saves cost.

The disclosure provides for an aircraft galley and lavatory energy system capable of independent operation from a separate aircraft energy generating system. The galley and lavatory energy system comprises an energy source providing electrical energy, heat energy, and at least one by-product; a plurality of galley and lavatory devices for receiving the electrical energy, the heat energy, and the at least one by-product; and, a plurality of connectors for connecting the electrical energy, the heat energy, and the at least one by-product to the galley and lavatory devices. The energy source comprises a fuel cell, a fuel module, and optionally, a supplemental fuel source.

A decrease in the capacity of a power storage device is inhibited by adjusting or reducing imbalance in the amount of inserted and extracted carrier ions between positive and negative electrodes, which is caused by decomposition of an electrolyte solution of the negative electrode. Further, the capacity of the power storage device can be restored. Furthermore, impurities in the electrolyte solution can be decomposed with the use of the third electrode. A power storage device including positive and negative electrodes, an electrolyte, and a third electrode is provided. The third electrode has an adequate electrostatic capacitance. The third electrode can include a material with a large surface area. In addition, a method for charging the power storage device including the steps of performing charging by applying a current between the positive and negative electrodes, and performing additional applying a current between the third electrode and the negative electrode is provided.

A voltage measuring apparatus measures the voltage of a measured object and includes a detection electrode capable of being disposed facing the measured object, a variable capacitance circuit that is connected between the detection electrode and a reference potential and whose electrostatic capacitance can be changed, a voltage generating circuits that generates the reference potential, and a control unit. The control unit causes the voltage generating circuit to change the reference potential while the electrostatic capacitance of the variable capacitance circuit is being changed. A power is measuring apparatus includes the voltage measuring apparatus and a current measuring apparatus that measures current flowing in the measured object, and measures power based on the current measured by the current measuring apparatus and the voltage measured by the voltage measuring apparatus.

A variable capacitance circuit includes a capacitance changing structure constructed by connecting a first construction unit, a second construction unit, a third construction unit, and a fourth construction unit, which each include a first electric element that hinders transmission of a direct current (DC) signal and has a capacitance that changes in accordance with the magnitude of an absolute value of an applied voltage, in the mentioned order in a ring. A voltage measuring apparatus measures the voltage of a measured object and includes a detection electrode capable of being disposed facing the measured object and the variable capacitance circuit described above. A power measuring apparatus includes a current measuring apparatus that measures current flowing in a measured object and the voltage measuring apparatus that measures the voltage of the measured object.

A repeatedly bendable power storage device. A highly reliable power storage device. A long-life power storage device. A repeatedly bendable electronic device. A flexible electronic device. The power storage device includes a film, a positive electrode, and a negative electrode. The film includes a plurality of projections. A difference between the maximum height and the minimum height of a surface of the film is greater than or equal to 0.15 mm and less than 0.8 mm. The modulus of rigidity of the film is less than 6.5×10⁹ N. The film includes a metal layer. The thickness of the metal layer is greater than or equal to 5 μm and less than or equal to 200 μm. The positive electrode and the negative electrode are surrounded by the film.

In order to enhance the tracking performance of power generation equipment with respect to a load variation and increase the reliability of the power generation equipment, a dynamic characteristic model simulating the dynamic characteristics of a multi-shaft gas turbine is used to calculate an output prediction value of a first power generator in a case where a combustor is controlled so as to match the output of the first power generator to an output target value; on the basis of the output target value and the output prediction value of the first power generator, a first power generator output instruction value as an instruction value for the output from the first power generator to a power system and a second power generator output instruction value as an instruction value for the output from a second power generator to the power system are calculated; and the combustor is controlled on the basis of the first power generator output instruction value and a frequency convertor is controlled on the basis of the second power generator output instruction value.

A filtering method, a transceiver and a transmitter are provided. The transmitter comprises a power amplifier amplifying an RF signal and having multiple stages, and a local oscillator, the power amplifier comprising between at least two stages of the power amplifier an impedance circuitry for forming an impedance at a frequency related to the frequency of the local oscillator, and a switch for switching the impedance of the impedance circuitry means to RF frequency.

The system disclosed herein is primarily utilized in the 23–48 volt DC telco, data center and industrial production industry. It will effectively replace today's requirement of purchasing, installing, maintaining and replacing chemical storage batteries. The solution will be capable of deployment partially and in full, inside the building, outside of the building in environmentally enclosed containers or in a mobile version. Additionally, the distribution voltage application will allow for reduction in the size of the power distribution wiring as well as creating an environment that requires less cooling of the critical equipment. This effectively leads to less infrastructure space and equipment, i.e. UPS, air conditioning units, static switch units, generators and chillers, for the same amount of processing, and significantly increases overall system reliability. The system regulates AC power and produces DC power that is considered uninterruptible and that is high quality in nature.

The invention belongs to the technology of rotor transmission of an aircraft, and particularly relates to a multi-shaft rotor aircraft and a transmission mechanism thereof. The multi-shaft rotor aircraft transmission mechanism comprises a reduction gear, a distribution gear and at least four groups of rotor transmission assemblies, wherein the reduction gear and the distribution gear are coaxial and synchronous; the reduction gear is connected with an external engine through a primary gear; each rotor transmission assembly comprises an acceleration gear, a first bevel gear, a second bevel gear, a transmission shaft, a third bevel gear and a fourth bevel gear which are sequentially meshed and connected; the acceleration gears and the distribution gear are meshed and connected, the fourth bevel gears and the rotor are coaxial and synchronous, and the rotor can be driven to rotate, so that the single engine can drive the multi-shaft rotor, a power system for an even number of rotors with more than four shafts can be expanded, and the rotating direction of each shaft can be configured randomly; therefore, the multi-axial rotor aircraft can have higher loading capacity and longer cruise duration than an electric multi-rotor aircraft.

The invention relates to a modular UPS integrated power distribution system which can solve the problems of high cost of purchasing equipment of a user, more fault points of a power utilization loop,poor reliability of power utilization and complicated work of an administrator. The adopted technical scheme is as follows: the modular UPS integrated power distribution system adopts a standardized system cabinet and a modular integrated structure, the structure comprises an anti-thunder device module, a two-way input utility power automatic switching device ATS, an on-line monitoring module, a UPS input port and a UPS output port, a UPS input-output power distribution module structure is connected with the UPS output port by means of an isolation transformer, therefore, a power distributionmodule set output by N branches is formed, wherein N is a positive integer which is larger than 1. The modular UPS integrated power distribution system reduces the cost of purchasing the equipment ofthe user, reduces the number of the fault points of the power utilization loop, improves the reliability of the power utilization and simplifies the work of the administrator.

There is provided a wireless power transmitting device including a transmission coil configured to transmit a wireless power signal to a wireless power receiving device; a driving driver configured to generate a wireless power driving signal which is a driving signal for the wireless power signal; an alternating current sensor configured to detect an alternating current signal of the transmission coil which is generated by a wireless power receiving signal including wireless power receiving information of a wireless power receiving device; an alternating voltage sensor configured to detect an alternating voltage signal of the transmission coil, the alternating current signal being generated by the wireless power receiving signal from the wireless power receiving device; a signal processing unit configured to process the alternating current signal and the alternating voltage signal from the alternating current sensor and the alternating voltage sensor; and a wireless power transmitting controller that, when the alternating current signal and the alternating voltage signal of the transmission coil are detected and signal processing is normally performed on at least one of the alternating current signal and the alternating voltage signal, obtains the wireless power receiving information through the signal on which the signal processing is performed and controls the driving driver on the basis of the wireless power receiving information. Further, there is provided a method for controlling to transmit a wireless power signal in the wireless power transmitting device.

The present invention discloses a power system reliability assessment method considering optimized scheduling of cascade hydropower stations, by which the reliability of the power system is improved, comprising following steps: establishing power system optimization models; inputting the sequential wind speed, runoff and load data within 24h; in accordance with reliability parameters of units and by the sequential Monte Carlo method, sampling the state durations of three kinds of units and segmenting the state durations on a 24-hour cycle; calculating the sequential output of wind farms within 24h according to wind speed data and the state of wind power units; calculating the hourly loss-of-load, according to the state of wind power units and thermal power units as well as the optimization models; optimizing for 365 days according to the method described in the step 4, and calculating reliability indices; and determining convergence or not, and if not, continuously repeating the steps S3 to S7 until convergence.

The invention discloses a mobile intelligent direct current power supply device, comprising a mobile control charging cabinet, a mobile pressure regulating feed cabinet and a mobile battery combined tank, wherein a first group of connecting interfaces on the mobile control charging cabinet are connected with a second group of connecting interfaces on the mobile pressure regulating feed cabinet byvirtue of cables; and the first group of connecting groups on the mobile control charging cabinet on the mobile control charging cabinet are also connected with the mobile battery combined tank by virtue of the cables. By applying the mobile intelligent direct current power supply device disclosed by the invention, electricity utilization reliability is improved, economic loss caused by fault andpower failure time is reduced, production cost is saved, working efficiency is improved, and safety management level is enhanced.

To provide an electronic device having high capacity and high reliability. To provide an electronic device with a small size which can be provided indoors even when it has high capacity. The electronic device includes a plurality of battery cells connected in series. The plurality of battery cells each include a first electrode, a second electrode, and an electrolytic solution between the first electrode and the second electrode. A reaction product, which grows from a surface of the first electrode when a current is supplied between the first electrode and the second electrode, is dissolved from its tip or surface by applying a signal to supply a current reverse to the current. The electronic device is stored in an underfloor space surrounded by a base and a floor of a building.