828results about How to "Avoid power loss" patented technology

In a transmitting arrangement a power amplifier is coupled to a radio-frequency antenna arrangement via a controllable matching apparatus. This allows direct impedance transformation of the output of the power amplifier to the input of the radio-frequency antenna arrangement. There is no need for transformation to the 50 ohm standard. The power amplifier, matching apparatus and a control circuit for controlling the impedance of the matching apparatus form a functional unit, which is advantageously in the form of a monolithically integrated structure in a semiconductor body. A receiving arrangement is produced in the same way, comprising an antenna, a filter device and a matching apparatus connected between them.

The invention discloses a charge control method and system for a low-voltage storage battery of an electric automobile, and a vehicle control unit and relates to the technical field of electric automobile vehicle control. The charge control method comprises the steps that after the electric automobile is started, the vehicle control unit controls a DC / DC convertor to start, and the low-voltage storage battery is precharged; after the low-voltage storage battery is precharged, the vehicle control unit controls the DC / DC convertor to stop, and voltage of the low-voltage storage battery is monitored; the vehicle control unit determines the battery state of the low-voltage storage battery according to the monitored voltage of the low-voltage storage battery; and according to the battery state of the low-voltage storage battery and / or the current operating state of the electric automobile, the DC / DC convertor is controlled to start or stop, and intermittent charge for the low-voltage storage battery is achieved. Through charge control over the low-voltage storage battery, the energy utilization ratio of the electric automobile is increased, and the service life of the low-voltage storage battery is prolonged.

An accumulation conveyor system for supporting and moving a plurality of objects. The conveyor system is divided into a plurality of zones wherein each zone includes a top and bottom conveying surface and wherein a space is defined between the top and bottom surfaces. Each zone also includes its own motor positioned external to the space between the conveying surfaces and coupled to the conveying surfaces via a non-slip connection. A control system is connected to the motor and controls the power to the motor so that the conveying surfaces in each zone can be moved independently. Whenever a sensor detects an empty downstream zone, it signals the control system of the upstream zone to power the motor and move the object to fill the empty zone. The control system may also be configured to allow a soft start wherein motor speed is increased gradually.

The invention relates to the data safety transmission technology, and discloses a configuration method of smart home network nodes and data transmitting and receiving methods. In the invention, long-term secret keys are distributed to the nodes of a smart home network, and encryption and decryption are performed on data information (INFO) through adoption of the long-term secret key (KEY) in the data transmission process, so data safety transmitting and receiving are achieved, a data packet is prevented from being intercepted, counterfeited and falsely issued, and safety of data interactions performed by the smart home network and a terminal is guaranteed.

The present invention provides an intelligent charging control method and device, a vehicle control unit and an electric vehicle, and relates to the technical field of vehicle control. The method comprises: acquiring a wake-up signal and an intelligent charging request signal sent by a remote control unit after the vehicle control unit is powered off; performing waking-up according to the wake-up signal, and calculating charging working time for charging a storage battery according to the intelligent charging request signal and the current voltage of the storage battery of the electric vehicle; and when the current status of the electric vehicle meets the intelligent charging condition of the storage battery, sending a charging signal to a direct current converting unit connected to the storage battery and controlling the direct current converting unit to charge the storage battery according to the charging working time. By applying the scheme, the function of intelligently charging the storage battery is fulfilled, and the problem that the storage battery is lack of electricity as the electric vehicle is parked for a long period of time is solved.

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.

The present invention discloses a function indication method, device and system, wherein the function indication method comprises the steps of sending an instruction carried in a channel or a signal to a UE, wherein the UE needs to receive the channel or the signal when accessing a network initially and before receiving the physical downlink shared channel (PDSCH) or physical downlink control channel (PDCCH) data, the instruction is used to indicate whether the network support a preset function, and the PDSCH data comprises the PDSCH data of a system parameter of a broadcast carrying the UE and the PDSCH data carrying an unicast service. According to the present invention, the problem of covering and enhancing the unnecessary power loss of a machine type communication (MTC) UE is solved, thereby avoiding the excessive power loss of the MTC UE.

The invention discloses a voltage regulation method based on inverter power coordination control. The method comprises the steps that during one sampling period, a constrained and optimized mathematical model is used for conducting power coordination control over photovoltaic inverters; the objective function (shown in the specification) of the constrained and optimized mathematical model is the minimum of the sum of reactive power output by all photovoltaic power sources, and the constraint conditions include the inverter capacity constraint, the node flow constraint, the node voltage constraint and the inverter power adjustment weight constraint; on the condition of meeting all the proposed constraint conditions, a set of reactive power adjustment quantities of the minimum sum of the reactive power output by all the photovoltaic power sources are solved through an optimization algorithm and serve as reactive power reference values for coordination control over all the photovoltaic inverters, and voltage adjustment of grid-connection points in an area is achieved. By means of the method, on the premise of not reducing the photovoltaic output active power, the voltage adjustment capacity of each inverter can be fully utilized, and the situation that unnecessary lien power losses are caused by output of excessive reactive power can be avoided.

The invention discloses an automatic charging method and system for an electric automobile on-board storage battery. The automatic charging method comprises the steps that 1, after an automobile is powered off, the still standing time exceeds the still standing time threshold value, and low-voltage power supply is conducted on a DC-DC converter; 2, whether the voltage of low-voltage power supply is smaller than the low voltage limiting value of the storage battery or not is judged; if not, the voltage of the DC-DC converter is low, and an automobile controller is powered off; and if yes, the automobile controller controls a high-voltage relay to be closed, the DC-DC converter is subjected to high-voltage power supply, and the storage battery is charged; 3, whether the voltage of high-voltage power supply is smaller than the undervoltage limiting value of a power battery or not is judged, and if yes, the DC-DC converter stops working, the automobile controller controls the high-voltage relay to be switched off, and the automobile controller is powered off; and 4, whether the charging current value is smaller than the full current threshold value or not is judged, and if yes, the automobile controller controls the high-voltage relay to be switched off, the voltage of the DC-DC converter is low, and the automobile controller is powered off. According to the automatic charging method and system for the electric automobile on-board storage battery, the problem that an error exists between the estimated still standing time and the estimated charging time is solved.

A circuit is disclosed for determining which of a multiplicity of LED strings in an illumination system has a fault. A group of circuits determines the maximum, minimum, midpoint between maximum and minimum, and average voltage of the group of LED string voltages in use, and examines the statistical properties of the LED string voltages. Comparators are used to find the strings which have the highest and lowest operating voltages, and to compare the midpoint and average voltages to determine whether the highest or lowest voltage string is responsible for causing a fault in the illumination system operation. Memory means are used to keep the said determined string turned off to prevent faulty operation.

The invention provides a parameter design method for a high-voltage high-capacity VSC (voltage source converter). The VSC is connected with an electric grid through an LCL (lower control limit) filter, the LCL filter comprises an electric grid side electric reactor, a valve side reactor and a filter capacitor, and the filter capacitor is connected in parallel between the valve side reactor and the electric grid side electric reactor. The problems for filtering out harmonic waves filled into the electric grid by the VSC and inhibiting the converter main loop resonance led in by the LCL filter are solved through setting the parameters of the LCL filter and a controller of the VSC. Compared with the simple experience algorithm and the complicated calculating method of the existing LCL filter, the method has the advantages that the parameter of the filter is designed according to the operation characteristics of the VSC and the frequency-domain characteristics of the LCL filter, simplicity is realized, the implementation is easy, the engineering construction can be realized, the theoretical basis is full, the harmonic pollution to the electric grid is low, and the grid-connected electric energy quality requirement of the national standard on the VSC can be met.

The present invention relates to a multi-mode wireless power transmission method and a device for the same. A wireless power transmitter for supporting a plurality of wireless power transmission modes, according to one embodiment of the present invention, can comprise: a first transmitter for transmitting a first power signal corresponding to a first wireless power transmission mode; a second transmitter for transmitting a second power signal corresponding to a second wireless power transmission mode; and a first power cutoff circuit coupled to the first transmitter so as to block the incoming second power signal and allow the first power signal to pass therethrough. Therefore, the present invention can minimize power consumption in the wireless power transmitter supporting the plurality of wireless power transmission modes, and can maximize power transmission efficiency.

The invention provides a mobile communication base station transceiver employing a software radio technology which is applied to a mobile communication system based on a time division (TD) / frequency division multiple address (FDMA) technology. The transceiver comprises three components, namely a multi-mode control device, radio frequency front end and a digital signal processing device. The invention also provides a method for realizing the transceiver. The invention flexibly adapts to receiving and transmission of the signals from single carrier base station to multiple carrier base station, and supports multichannel diversity receiving; due to the adoption of a wideband transmitter, the invention flexibly adapts to emission of multiple carriers with irregularly distributed frequency and also avoid power loss when the multiple carriers are combined; by adoption of multiple narrow band radio frequency receiving channels, the invention can meet requirements for high dynamic and high blocking resistance performance of signal receiving; and by the invention, the mobile communication base station which has low power consumption, small size, high performance and flexible configuration can be realized.

The invention relates to an automobile starting and stopping protective system and method. The automobile starting and stopping protective system comprises a storage battery, an electric quantity sensor and an automobile body controller which is connected with a CAN bus. The electric quantity sensor is arranged at the output end of the storage battery, is used for detecting the discharge current of the storage battery and is connected with the communication end of the automobile body controller through a LIN bus. When an ignition lock ON gear switch is disconnected, the automobile body controller sends a network dormant message through the CAN bus, so that idle electronic equipment connected with the CAN bus enters the dormant state, and the automobile body controller enters the dormant state after the discharge current of the storage battery is smaller than a first threshold value. After the automobile body controller enters the dormant state, if the discharge current of the storage battery is larger than a second threshold value, constant electricity output by the storage battery is controlled to be disconnected in the set time, and a forced outage message and a failure warning message are sent through the CAN bus. Through the automobile starting and stopping protective system and method, the safety of an automobile can be improved, and the energy consumption of the automobile is reduced.

The invention discloses a maximum power point tracking (MPPT) controller for a solar photovoltaic system. The MPPT controller comprises a temperature sensor module, a control module, a memory module and a counter module, wherein the memory module receives data transmitted by the temperature sensor module and voltage and current data transmitted by the control module, looks up a local data table and finds out duty ratio data required for adjusting the current operating point to the maximum power point; and the counter module outputs a square wave which corresponds to a duty ratio to a driving circuit module according to the duty ratio data. By the control method of the MPPT controller, due to a method for looking up the data table, the position of the maximum power point is not required to be calculated or searched on site, and the duty ratio of a direct current-direct current (DCDC) circuit is adjusted at a time by utilizing the position of the calculated maximum power point in the table, so that a solar cell works in a maximum power point state. The power loss caused by continuous tracking or on-site calculation is avoided, and the circuit share complexity is effectively reduced.

The invention provides a switching device driving unit that, even in a case where a threshold voltage of a switching device is varied, can suppress variations in switching speed, and prevent a power loss caused by an unnecessary gate current in a constant ON operation state of the switching device, so that a desired slew rate can be easily set. A control current source circuit (21) sets to different values based on a first input driving signal (UD), in a driving current to be source-outputted to a gate or a base of the switching device (11), a current (I1+I2) in a stage of an initial ON operation of a switching operation of the switching device and a current (I1) in a stage after completion of the switching operation.

The invention discloses a raising speed control energy saving system and a raising speed control energy saving method for an excavator. The raising speed control energy saving system comprises a pilot pressure sensor, a controller and an accelerator control mechanism. The pilot pressure sensor is used for detecting pilot pressure signals of all actions of the excavator; the controller is connected with an accelerator knob and the pilot pressure sensor of the excavator; the accelerator control mechanism is connected with the controller; and the controller controls the openness of an accelerator based on working gears transferred by the accelerator knob and load conditions detected by the pilot pressure sensor according to different stages by the accelerator control mechanism. By the system and the method, the power loss of an engine is avoided, and the engine and a main pump run in the most economic state. Moreover, the efficiency of large excavators is improved, and oil consumption is reduced under the condition that auxiliary equipment is not added.

The invention discloses an escalator safety system which comprises a monitoring relay, a processing module, a laser emitter and a laser receiver. The output end of the monitoring relay is connected into an escalator operation loop. The processing module controls the monitoring relay to be closed and opened. The laser emitter is provided with a laser emitting opening and arranged at the high end of an escalator and the emitting opening faces the low end of the escalator or the laser emitter is arranged at the low end of the escalator and the emitting opening faces the high end of the escalator. The laser receiver receives laser from the laser emitter and is in signal connection with the processing module. The laser receiver and the laser emitter which are matched are arranged at the high end and the low end of the escalator respectively. The laser emitter and the laser receiver are arranged in a well of the escalator. According to the escalator safety system, the problem that power is consumed due to the fact that infrared detectors are arranged densely or response is not in time due to the fact that infrared detectors are arranged sparsely is solved, one induction line can monitor multiple stairs at the same time, the detectors can achieve feedback immediately once the stairs fall down, the number of required detectors is small, and power consumption is low.

The invention provides a dual-network-segment controlling method and system. The method comprises: after the power of an overall vehicle is off, an ESC collects a current vehicle speed and a gateway collects a state of a vehicle body CAN bus; the ESC sends a power CAN message including current vehicle speed information to the gateway by a power CAN bus; if the vehicle body CAN bus does not enter a sleep state, the gateway converts the power CAN message into a vehicle body CAN message and sends the vehicle body CAN message to a PEPS by the vehicle body CAN bus; the PEPS determines whether the vehicle speed information in the vehicle body CAN message is zero; if so, a steering wheel delocking operation is executed; and if the vehicle body CAN bus enters a sleeping state, the gateway sends information of stopping sending of the power CAN message including the current vehicle speed to the ESC by the power CAN bus. Therefore, a problem of unnecessary storage battery power consumption due to data sending by the ESC to the vehicle body CAN bus in a sleeping mode in the prior art can be solved.

A hybrid injection device for a die casting machine, in which a large electric power loss is prevented from occurring by avoiding a large current during pressurizing and holding operation and in which the size of a motor is reduced. The injection device has an injection cylinder (16) for receiving an injection piston (15) for injecting a molten metal into a mold and an electric booster (8) operating with a hydraulic cylinder. A head chamber (8H) of an electric booster is fluidically communicated with the head chamber (16H) of the injection cylinder. The head chamber (8H) linearly moves a booster piston rod (5) received in the electric booster (8) to push and move the injection piston, performing injection molding. Because a stop valve (25) is installed in a pipe interconnecting the head chamber (16H) of the injection cylinder and the rod chamber (8R) of the booster (8), the injection device can produce pressure by the head area of the electric booster during the boosting and produce pressure by the rod area thereof during pressurizing and holding operation.

The invention discloses a local dormancy awakening method for a CAN bus star network management architecture scheme. The method comprises the following steps that a CAN network management message anda plurality of controllers corresponding to multiple operations are provided, wherein the CAN network management message is based on an OESK network management message format and is provided with a destination address (DA) and a network management state bit CF; and when a vehicle executes the operation, only the controller related to the operation is awakened by the CAN network management message,and the controller unrelated to the operation is not awakened and is still in a dormant state in order to reduce the number of the awakened controllers. According to the method, the number of the awakened controllers is reduced to the minimum value through the local network dormant awakening, and the lack of electricity of a storage battery is effectively prevented.

The invention discloses a method and device for reducing camera power consumption, and a mobile terminal, wherein the method comprises following steps of receiving a photographing preview instruction; detecting environment brightness and a focusing triggering condition; judging whether the environment brightness change exceeds an appointed threshold value or not and whether the focusing triggering condition is satisfied or not; when the environment brightness change does not exceed the appointed threshold value and the focusing triggering condition is not satisfied, locking an AE / AF function and a camera image signal processor ISP; and otherwise, unlocking the AE / AF function and the camera image signal processor ISP, and returning to the step of detecting the environment brightness and the focusing triggering condition. According to the method, the device and the mobile terminal, through detecting external environment factors such as the environment brightness and the focusing triggering condition, the AE / AF is dynamically locked or unlocked; AE / AF algorithms are reduced; the operation time of the camera image signal processor ISP is reduced; the camera power consumption is reduced; and the electric quantity of the mobile terminal is reduced and the battery duration of the mobile terminal is improved.

An assembly includes an analog signal processing unit. An analog signal path and an amplifier an automatic gain control unit are coupled to the signal path. Further to the output of the amplified analog signal, a gain information is provided as an analog or digital signal at a gain information output. This information can be used for further processing the signal, e.g., by automatic noise compression or to control further signal processing units.

The invention provides a data synchronization method, a data synchronization system and a terminal of multi-system equipment. The data synchronization method of the multi-system equipment comprises the steps that judgment on whether data of any system in multiple systems is updated or not is conducted; judgment on whether system switching instructions are received or not when the data of any system in the multiple systems is updated is conducted; packing the updated data to generate data packets to be synchronized is conducted when receiving the system switching instructions is judged; sending the data packets to a system to be switched to complete data synchronization process is conducted. According to the technical scheme of the data synchronization method, the data synchronization system and the terminal of the multi-system equipment, the data synchronization effect among the multiple systems is achieved; in addition, power loss caused by conducting data synchronization whenever the system is switched is avoided due to the fact that the data synchronization is conducted according to the system switching instructions only when the data is updated, so that memories of the multi-system equipment are reduced, the fluency of the multi-system operation is guaranteed, and the usage experience of users is improved.

The invention relates to the field of intelligent charging technologies, and provides an AGV (automatic guided vehicle) wireless charging system and a charging method implemented by the same. By the aid of the AGV wireless charging system and the charging method, the shortcoming that vehicles are difficult to automatically work for a long term due to low automation degrees of existing AGV charging modes can be overcome. The AGV wireless charging system comprises a vehicle charging device and a ground charging device. The vehicle charging device comprises a navigation device, a charging module and a master controller; the navigation device is used for acquiring position information and attitude information of vehicles; the charging module is used for detecting electric quantity information of batteries of the vehicles and transmitting charging or charging stopping instruction information to the ground charging device; the position information, the attitude information and the electric quantity information can be received and processed by the master controller, the vehicles can reach charging positions of the ground charging device or can return working positions under the control of the master controller according to the information, and the instruction information can be transmitted to the ground charging device by the charging module under the control of the master controller according to the information; the ground charging device is used for receiving the instruction information and outwardly transmitting power according to the instruction information.

The invention relates to an automatic charging device for a static electric automobile storage battery, which comprises a direct current-direct current (DC-DC) converter, a charging control circuit and an automobile startup switch, wherein the DC-DC converter is connected with an automobile power battery; the charging control circuit, under the condition that the automobile startup switch is turned on, is connected with the DC-DC converter directly to enable the DC-DC converter to work and charges the storage battery by using the power battery of an automobile, and the charging control circuit, under the condition that the automobile startup switch is turned off, detects the voltage of the storage battery automatically, and when the voltage of the storage battery is overlow (lack of power), triggers the working of the DC-DC converter and charges the storage battery by using a vehicle-mounted power battery; and the automobile startup switch is used for starting or turning off the engine of the automobile.

The invention relates to a branch crushing vehicle. The vehicle comprises a chassis, a transmission shaft, a power distributor, a gear case, a material storage bin, a belt transmission mechanism, a crusher, a hydraulic valve, a hydraulic pump, a hydraulic motor, an engine, a rear axle and support legs, wherein the engine, the hydraulic pump, the power distributor, the gear case and the rear axle are fixed on the lower side of the chassis of the vehicle; the crusher and the material storage bin are arranged above the chassis of the vehicle; the transmission shaft is connected with an output shaft of a gear box of the engine and an input shaft of the power distributor, and a first output shaft of the power distributor is connected with a transmission input shaft of the gear case; and both ends of a transmission output shaft of the gear case are in transmission connection with the belt transmission mechanism and the hydraulic pump respectively, the belt transmission mechanism and the hydraulic pump are in transmission connection with a cutter head shaft and a feeding roller of the crusher respectively, and a second output shaft is connected with the rear axle. The vehicle has the advantages that: branches are crushed at any time and in any place, the conveying efficiency is improved, and the operating cost is lowered; because the milling mode is adopted for cutting, the crushing efficiency is high; and the occupied area is small, and the vehicle hardly affects traffic when working.