226results about How to "Control power" patented technology

The invention discloses a downlink power control method and a downlink power control device applied to a long term evolution (LTE) system. The method comprises the following steps of: configuring an absolute power value ECRS_dBm for a resource element (RE) including a cell reference signal (CRS); configuring parameters indicating a transmission power of a same type for all downlink physical channels or downlink physical signals except the CRS according to the ECRS_dBm; and performing power control on the transmission of the downlink physical channels or the downlink physical signals according to the ECRS_dBm and the parameters indicating the transmission power. In the invention, the method for configuring the power value of the all downlink physical channels or the all downlink physical signals in the implementation of an LTE product is provided, so that the correct demodulation of receiving data by user equipment can be guaranteed, and the safety of network-side base station equipment can be guaranteed.

Provided is a method of controlling power of a downlink channel in a wireless communication system, the method including: transmitting at least one data to a user equipment; receiving feedback information for the data from the user equipment; and controlling downlink transmission power using the feedback information. It is possible to control the power without time delay and additional use of radio resources in a VoIP service which is responsible for satisfying a fixed transmission rate in real time. Moreover, it is possible to control the power without waste of control channels to perform PDCCH link adaptation.

The invention relates to an electric automobile power battery management system and method. The electric automobile power battery management system comprises a battery information detection module, a central processing module, a logical switch array switching module and a power module, wherein the battery information detection module can be used for detecting the voltage of each battery monomer; the central processing module is used for receiving the voltage of each battery monomer detected by the battery information detection module, comparing all voltages in the detection result, calculating an average voltage value and finding out the battery monomer the voltage of which is lower than the average voltage value and is the lowest in a battery set; the battery monomer the voltage of which is lower than the average voltage value and is the lowest in the battery set is conducted with the logical switch array switching module by the central processing module; and the power module is used for supplying power for the central processing module and charging the battery monomer the voltage of which is lower than the average voltage value and is the lowest in the battery set. With adoption of the electric automobile power battery management system, the charging power of a battery can be accurately controlled, and the charging efficiency is high.

The invention relates to an energy control method of an urban rail super capacitor storage system. The method comprises the following steps that: a direct-current power supply network voltage Udc and a super capacitor module group terminal voltage Usc are collected respectively and an output branch current Isc of the super capacitor module group is connected within each control period; a charging-discharging threshold calculation module outputs a charging threshold value Uchar and a discharging threshold value Udis in real time based on the super capacitor module group terminal voltage Usc within each control period; and according to a relation between the charging threshold value, the discharging threshold value, and the direct-current power supply network voltage Udc, a current control period of an urban rail super capacitor storage system is determined to be in a charging state, discharging state or a standby state. According to the energy control method provided by the invention, multiple sets of urban rail super capacitor storage systems can work in a coordinated mode and thus the urban rail super capacitor storage systems can absorb brake energy of the train fully and effectively, thereby improving the energy utilization efficiency of the urban rail power supply system. Moreover, fluctuation of the direct-current side voltage of the power supply system can be inhibited.

The invention discloses a hybrid direct current power transmission system control method and device. The hybrid direct current power transmission system adjusts in real time the total number of used submodules of a modular multilevel converter, and the output level polarity of the used submodules according to the direct current voltage of a rectifier station at the other end; or adjusting in real time the total number of used submodules of a modular multilevel converter, and the output level polarity of the used submodules according to direct current or direct current power; or adjusting in real time the total number of used submodules of a modular multilevel converter, and the output level polarity of the used submodules meanwhile according to the direct current and the direct current voltage of a rectifier station at the other end. The method can effectively control system direct current voltage and direct current, and avoid power transfer interruption of a hybrid direct current power transmission system.

The invention relates to a power battery balance charging method and a power battery balancing circuit. The circuit comprises a voltage detection, analysis and comparison circuit, a balance switching circuit, an internal constant current source circuit and a power supply management and protection chip, wherein the voltage detection, analysis and comparison circuit is used to detect the voltage of each battery unit in a battery pack in real time and to respectively transmit detection results to the balance switching circuit and the power supply management and protection chip; the balance switching circuit makes a comparison and a judgment to all voltage values to find the battery unit with the voltage which is lower than the preset voltage value and is the lowest among the voltage of all battery units in the battery pack, a compensation battery is connected with the battery unit through the switching circuit to compensate the battery unit with electricity, and the electricity compensation is stopped when the voltage of the battery unit reaches the average voltage or the highest battery voltage; and by parity of reasoning, other battery units are charged. The invention has the advantages that the compensated electricity of the battery can be accurately controlled; the compensation current is large and the efficiency is high; and the compensation conditions can be flexibly adjusted.

The invention relates to a method, a system and a mobile terminal for radio frequency power calibration. The method comprises the following steps of: demodulating reference frequency of a forward pilot signal; performing clock synchronization according to the reference frequency of the forward pilot signal; and transmitting a power test signal corresponding to the calibration reference frequency to make a radio frequency tester detect the power value of a power test signal. By synchronizing the reference clock frequency of the mobile terminal with the reference clock frequency of the radio frequency tester and setting the same calibration reference channel number in the radio frequency tester and the mobile terminal, the embodiment of the invention ensures that the radio frequency signal transmitted by the mobile terminal has the same frequency as the measured frequency of the radio frequency tester and has the same bandwidth range as that of the measured frequency; and thus the power of the radio frequency signal transmitted by the mobile terminal is completely received by the radio frequency tester, so that the accuracy of testing the power of the radio frequency signal of the mobile terminal is improved and the mobile terminal can accurately select the PDM value to control the power of the radio frequency signal during the use.

The invention relates to a non-isolated three-port DC-DC converter and a method for using the same. The converter is applied to a photovoltaic battery / battery / DC microgrid, and is provided with three ports of a photovoltaic battery PV, a battery BT, and a direct current bus DC. It includes two boost circuits and a buck-boost circuit, a boost circuit is used to connect the photovoltaic cell and the DC bus, a boost circuit is used to connect the photovoltaic cell PV and the battery BT, and a boost-boost circuit is used to connect the battery BT and DC bus DC; the specific circuit composition is: the positive pole of the photovoltaic cell PV is connected to the inductance L 1 After that, three branches are drawn, the first branch is connected to the switch tube S 1 The drain of the switch tube S 1 The source of the ground is grounded; the second branch is connected to the diode D 1 the anode of the diode D 1 The negative pole is connected to the DC bus DC; the third branch is connected to the diode D 2 the anode of the diode D 2 The negative pole of the switch is connected to S 4 The drain of the switch tube S 4 The source of the battery is connected to the positive pole of the battery BT; the positive pole of the battery BT is connected in series with the inductance L at the same time 2 Then lead out two branches, one branch is connected to the switch tube S 2 the drain.

The invention discloses a fire evacuation system and an evacuation method. The fire evacuation system comprises a fire evacuation acoustic-optical indicating system, an acoustic-optical power supply system, a fire parameter detection system, a control system and a fire alarm system; the fire evacuation acoustic-optical indicating system, the acoustic-optical power supply system and the control system and electrically connected mutually; the acoustic-optical power supply system continuously supplies power for a lamp assembly in the fire evacuation system; the control system controls the acoustic-optical power supply system to supply power for a voice prompt device in the fire evacuation acoustic-optical indicating system through a second power supply circuit and controls the luminance of the lamp assembly and acoustic-optical contents of the fire evacuation acoustic-optical indicating system through the control circuit; the fire parameter detection system and the control system are electrically connected to the fire alarm system through data transmission lines respectively. The fire evacuation system can provide different evacuation guidance for users at different floors according to point locations of fires and fire conditions of fire scenes and avoids the users from running to error channels or taking error actions and accordingly gets into danger.

The invention discloses an electric cooker with fresh-keeping and refrigerating functions. The electric cooker comprises a cooker body, a cooker cover arranged on the cooker body as well as a pot body, an electromagnetic heating furnace core, a refrigerating and fresh-keeping device and a controller which are arranged in the cooker body, wherein the electromagnetic heating furnace core comprises a furnace core casing and an electromagnetic heating coil, and an electromagnetic coil part is formed after the electromagnetic heating coil wounds around the furnace core casing and corresponds to a circular arc transition part of the pot body; the electromagnetic heating coil is electrically connected with a heating control end of the controller; the refrigerating and fresh-keeping device comprises a semi-conductor refrigerating module and a heat dissipating device, a cold surface of the semi-conductor refrigerating module is attached to the bottom wall of the pot body, the heat dissipation device is arranged on the hot surface of the semi-conductor refrigerating module, and the semi-conductor refrigerating module is electrically connected with a refrigerating control end of the controller. The electric cooker also has fresh-keeping and refrigerating functions except conventional functions and can cool and refrigerate the pot body and food materials in the pot body, so that the food materials in the pot body can be kept fresh and refrigerated.

The invention provides a device for removing dew on glass, comprising a dew removing unit, a temperature detection unit and a control unit, wherein the dew removing unit is used for removing dew on the outer surface layer of the glass; the temperature detection unit is used for detecting the temperature inside and outside the glass; and the control unit is used for confirming whether reaches a dewpoint or not according to the temperature difference detected by the temperature detection unit inside and outside the glass, controlling whether the dew removing unit is started or not and carrying out power control in the dew removing process. The invention also provides a method for removing the dew on the glass, comprising the following steps of: detecting the temperature inside and outside the glass; then confirming whether reaches the dewpoint or not according to the detected temperature inside and outside the glass; and controlling the starting and the power of dew removing on the outer surface layer of the glass. The invention can be used for solving the dew condensation trouble under different temperature differences.

The present disclosure is characterized by including the steps of obtaining a resource pool for use in D2D communication in a wireless communication system, wherein the resource pool includes at least one of a scheduling assignment (SA) resource pool that represents a resource region to which the SA is transmitted, or a data resource pool that represents a resource region to which D2D data is transmitted; transmitting SA including information related to D2D data transmission to a second terminal through the SA resource pool; and transmitting D2D data to the second terminal.

The invention discloses a control method for a phase change heat storage heating system. The phase change heat storage heating system comprises a central processing unit, a storage device, an electric heating boiler, a heat reservoir and a detection device. The central processing unit is connected with the electric heating boiler, the heat reservoir, the detection device and the storage device. The control method includes the following steps that firstly, heat storage is conducted on the heat reservoir through the electric heating boiler in the valley electricity time, heat release is conducted on the heat reservoir in the peak electricity time, and the rest of heat Qs of the electric heating boiler is calculated; secondly, the heat Qx needed in the period from the current time to the valley electricity starting time is estimated; and thirdly, whether Qs is smaller than Qx is judged, if the judgment result shows that Qs is smaller than Qx, the electric heating boiler is immediately started to store energy for the heat reservoir or store energy for the reservoir in the low-electricity-price time period, and if the judgment result shows that Qs is not smaller than Qx, the first step is executed. The whole phase change heat storage heating system is monitored, the starting time of the electric heating boiler can be elaborately controlled, when the heat of heat reservoir energy is insufficient for maintaining use of a user at a certain moment, heat storage and energy storage are conducted on the heat reservoir automatically in a relatively-ordinary-electricity-price time period or a valley-electricity-price time period.

The invention relates to an air compressor with ultrasonic bearings. The air compressor with ultrasonic bearings comprises a shell, a motor stator, a motor rotor and a rotor shaft from outside to inside, and further comprises the ultrasonic bearings and a spiral groove type thrust bearing, wherein bearing bushes are arranged at the two ends of the shell, impellers are arranged at the two ends of the rotor shaft respectively, the impellers are sleeved with impeller shells, the impeller shells are in sealing connection with the bearing bushes and are provided with air inlets and air outlets, the air outlet of the impeller shell at one end is connected with the air inlet of the impeller shell at the other end, the ultrasonic bearings are arranged on the bearing bushes at the two ends and are in noncontact connection with the rotor shaft, the spiral groove type thrust bearing is arranged on the part, between the bearing bush at one end and the impeller at the same end, of the rotor shaft, and a thrust bearing cap is arranged between the spiral groove type thrust bearing and the corresponding impeller. Compared with the prior art, the air compressor with ultrasonic bearings has the advantages of being high in rotation speed and efficiency, long in service life, free of lubricating oil and the like.

The invention discloses a drive circuit of a laser source of a laser projector, which comprises an input interface, a first drive generation circuit, a second drive generation circuit and an output interface, wherein the first drive generation circuit and the second drive generation circuit are two parallel drive generation circuits and are symmetrically distributed between the input interface and the output interface; and the two parallel drive generation circuits are integrated together and connected with an external power supply system through the input interface, and output a transformed voltage through the output interface. The invention satisfies the electric demands for the laser source of the laser projector, greatly reduces the volume of the drive circuit board, implements control on the power of the laser device, and has the function of current control for accurately controlling the emergent light ratio.

The invention belongs to the technical field of illumination, and relates to a temperature-controllable high-power light-emitting diode (LED) lighting system. The lighting system comprises a power-free heat pipe, a revolution speed-controllable fan, a heat-sensitive sensor, a microprogrammed control unit (MCU), an LED driving chip, a power control circuit and a multichannel LED module. The base of the LED module is closely fit with one end of the power-free heat pipe so as to realize heat dissipation through conduction, the other end of the power-free heat pipe is connected with the revolution speed-controllable fan, the heat-sensitive sensor is encapsulated between a fluorescent powder layer and a plastic lens layer of the multichannel LED module, the output end of the heat-sensitive sensor is connected with the MCU and outputs a temperature sensing curve. The MCU is internally provided with and operates a fuzzy logic dynamic control program and is used for sending control signals to the LED driving chip and the fan. The closed loop dynamic branch control of the temperature of the high-density high-reliability high-power LED lighting system can be realized, the temperature is dynamically adjusted by utilizing configurable fuzzy logic intelligent control, the luminous efficiency of an LED is guaranteed.

The invention discloses a vehicle electronic system constant-electric node state switching method, a constant-electric node network and a vehicle. The method comprises the steps of: entering a pre-dormancy state under an activation state when a pre-dormancy condition is met; continuously monitoring states of other constant-electric nodes under the pre-dormancy state; entering a dormancy waiting state when all other constant-electric nodes are judged to maintain the pre-dormancy state, and entering the activation state when a wake-up signal is received; entering the pre-dormancy state when any one of other constant-electric nodes is monitored to be in the activation state under the dormancy waiting state, entering the dormancy state when other constant-electric nodes are monitored not to be in the activation state in a first preset time, and entering the activation state when the wake-up signal is received; and under the dormancy state, one constant-electric node continuously monitoring the states of other constant-electric nodes: entering the activation state when any one of other constant-electric nodes is monitored to be in the activation state, and entering the activation state when the wake-up signal is received.

The invention relates to a mixed gas feeder of a target knife and a method for controlling refrigeration capacity output. The feeder comprises two steel cylinders, two gas flow controllers, a mixing chamber, a high-voltage pressure controller, a high-voltage magnetic valve, a low-voltage pressure controller, a low-voltage magnetic valve, a controller, a pre-cooling system and a target knife, wherein different gases with the Joule-Thomson effect are filled in the two steel cylinders; the gases flow out of the steel cylinders, enters the mixing chamber to be fully mixed after being subjected to flow regulation by the flow controller, flows through the pressure controllers and the magnetic valves in sequence, enters the pre-cooling system to be pre-cooled, and flows to a target zone for throttling cooling. According to the invention, the flow of the two steel cylinders can be regulated to be different through the controller so as to realize the situation that two gases are mixed in an arbitrary mixing rate; the throttling cooling property of N2 and Ar is fully utilized, so that the cooling capacity of an input knife head is accurately controlled, different cooling capacity requirements for cryoablation of tumors at different parts are met, the cryoablation effect is guaranteed and effective utilization rate of the cooling capacity of the pre-cooling system is improved at the same time, the gas source is saved, and burdens of a patient are alleviated.

The invention belongs to the technical field of avionic technology, and in particular relates to a super capacitor charging circuit which comprises a switch power circuit2, a voltage-current conversion circuit 5, a current-voltage conversion circuit 3, a power-current conversion circuit 6 and a feedback selection circuit 4. The super capacitor charging circuit mainly performs charging control on a super capacitor, enables the super capacitor to be charged by adopting constant current when the super capacitor is in low voltage, and is charged by adopting constant power when the voltage is high. Electric charge is complemented for the super capacitor by adopting a constant voltage method when the voltage achieves a set value. By adoption of the charging circuit, the situation that after the voltage at the end of the super capacitor is increased, the requirements for power of a power supply are over-high through a method of constant current charging can be avoided.

The invention discloses a method for achieving coherent laser beam combination, and belongs to the technical field of lasers. The method includes the steps of dividing signal light emitted by a laser device into multiple routes of laser beams, leading out one of the multiple routes of laser beams as current reference light, enabling the rest of the multiple routes of laser beams to be coupled with corresponding blue light beams respectively, conducting amplification on the coupled beams, and outputting the beams in a collimation mode after the beams undergo light modulation to obtain a coherent laser beam. The light modulation is achieved through the step of modulating blue light in each route of light beams into laser phase positions. The power of the current blue light beam which is coupled with the laser beam depends on the phase position difference between previous reference light and the corresponding route of light beam which is outputted in the collimation mode after the light modulation is conducted. Meanwhile, the invention further provides a device corresponding to the method. The method is easy and convenient to achieve, the device is easy and convenient to obtain, accurate phase position modulation can be achieved without specific requirements for the thermal bearing capacity of devices, high-power coherent laser output is achieved, and the method and device can be widely applied to the laser technology.

The invention discloses a power control method and device for controlling power of a retransmitting confirmation indication channel in high-speed uplink packet access. The method comprises the steps of: respectively counting frequency of transmission faults of feedback information on an E-HICH (Enhanced-Hybrid Indication Channel) and comparing the frequency with a preset value, and counting transmission block error rate on an E-PUCH (Enhanced-Physical Uplink Channel) of UE (User Equipment) corresponding to each feedback information, comparing smoothened transmission block error rate with a preset block error rate to obtain a power gain factor increment and a second power gain factor increment of each feedback information; respectively weighting the first power gain factor increment and the second power gain factor increment and summating; and regulating the power gain factor of each feedback information according to the summated value. The power gain factor of the feedback information multiplexed on the E-HICH is regulated through controlling the E-PUCH, thus the sending power of the feedback information is regulated, and the purpose of controlling the power of the E-HICH is realized.

Disclosed is a pixel circuit including a light emitting element having one terminal and the other terminal, a driving transistor that supplies a driving current to the one terminal of the light emitting element, a first power line electrically connected to the other terminal of the light emitting element and receiving a first potential, a control transistor provided between a second power line, which receives a second potential, and a source of the driving transistor, and having a gate that receives a control signal through a control line, a first capacitor provided between the second power line and a gate of the driving transistor, a second capacitor provided between the gate and the source of the driving transistor, and a select transistor provided between a data line, which receives a data potential, and the gate of the driving transistor, and having a gate that receives a scanning signal through a scanning line.

The invention discloses a charging control method. The charging control method is applied to first electronic equipment, and the first electronic equipment is used for transmitting electric energy to second electronic equipment in a wired or wireless way. The charging control method comprises the following steps of in the electric energy transmitting process, detecting the transmitted electric energy or the remained electric energy; judging whether the transmitted electric energy or the remained electric energy reaches the preset first threshold value or not, so as to obtain a first judging result; when the first judging result shows that the transmitted electric energy or the remained electric energy reaches the preset first threshold value, generating a first instruction; according to the first instruction, stopping the transmitting of the electric energy. The invention also discloses electronic equipment. By adopting the technical scheme, the electric amount of charging can be controlled in the charging process.

The invention relates to a power control circuit and an electric stabilizer with the same. the power control circuit, which can regulate power effectively, includes a load circuit, a power switch unit, a voltage detecting unit, an error amplifier, a current detecting unit, a comparator and a drive die set, wherein the load circuit being connected with loads and outputting an output voltage; the power switch unit receiving an input voltage to provide for the load circuit in switch; the voltage detecting unit detecting the output voltage and generating a first voltage signal; the error amplifier receiving the first voltage signal and a reference voltage, and outputting a second voltage signal; the current detecting unit detecting the current across the power switch unit and generating a third voltage signal; the comparator comparing the second and the third voltage signals; the drive die set generating a drive signal based on the comparative result of the comparator; the driver power switch unit switching, controlling and providing a load power. The electric stabilizer includes a power control circuit, a rectification circuit and a commutation circuit. The invention can regulate power instantly, and saves cost and is suitable for high illumination intensity air discharge lamp.

The invention provides a ship tail end power distribution system. The system comprises a power network used for power transmission and an information network used for managing a regional power distribution system, a digital control mode is adopted, the power flow of all branches or ports is accurately controlled, the power scheduling function is optimized, the simultaneous parallel power supply ofmultiple paths of power sources is achieved, and a power supply mode is converted from passive power distribution to active power distribution; by connecting an electric energy interconnection deviceand port equipment thereof and communicating with a ship energy management system and a comprehensive platform management network, the accurate guarantee and reasonable distribution of the electric energy in the area are effectively performed as required, and the fusion of the energy flow and the information flow is realized.

The invention relates to the technical field of power system automation, in particular to a power and energy balance optimization method based on wind power capacity credibility. The power and energybalance optimization method comprises the steps that data of thermal power and hydropower units of provinces in a study area are collected; load forecast curves and wind power forecast outputs of theprovinces in a decision-making period are obtained; wind power credible forecast outputs are obtained according to the wind power capacity credibility and the wind power forecast outputs; a tie line transmission power plan is drawn up, the maximum and the minimum of transmission power are set in time segments; the minimum operating cost of the whole network is used as a target operation function,and power balance constraint, unit operation constraint, tie line transmission constraint, electric quantity constraint and rotation reserve constraint are used as constraint conditions, so that a power and energy balance optimization model is established; and the optimal outputs of generator sets of the provinces and the transmission power of tie lines between the provinces are obtained by solving the model. The uncertain wind power outputs are converted into credible unit outputs through wind power credibility calculation, and the problem that a traditional power and energy balance method cannot properly consider wind power is solved.

A magnetic resonance wireless power transmission device capable of adjusting resonance frequency is disclosed. A wireless power transmission device according to an embodiment of the present invention comprises: a power amplifier for amplifying a wireless power signal using a driving frequency signal; a resonator for configuring a resonance tank and wirelessly transmitting, through magnetic resonance, the wireless power signal output from the power amplifier using a resonance frequency of the resonance tank; and a resonance control unit for controlling a duty ratio using a frequency applied to the resonator or a frequency signal generated by the resonator and adjusting the resonance frequency of the resonator.

The invention discloses a cladding light stripper for optical fiber lasers and a making method thereof. The stripper comprises a cladding optical fiber, multiple optical gratings, and a cooling tube sleeve. The making method comprises the following steps: coating the outer surface of a bare optical fiber inner cladding with ultraviolet photoresist of which the refractive index is greater than or equal to that of the inner cladding; etching multiple gratings on the ultraviolet photoresist, and stripping out the residual light in the inner cladding through diffraction of the multiple gratings; and sleeving the finished multiple gratings in a metal tube, and sealing the metal tube with a sealing sleeve, wherein the wall of the metal tube is fully covered with a heat absorption material which absorbs the light stripped from the inner cladding, and circulating cooling water is fed to take away the generated heat. The light transmittance of the cladding light is adjusted by gratings of different structures so as to achieve the purpose of efficient and uniform light stripping, avoid overheated spots of the stripper and ensure high stability of optical fibers. The stripper has the characteristics of simple structure, wide applicability, high reliability, and the like.