36results about How to "Prevent power transmission" patented technology

The invention discloses a system and a method for controlling an online type photovoltaic power generation microgrid without a storage device. The system comprises a photovoltaic component, a power controller, a grid-connected inverter system, a current detection device and a reverse-power protector, the photovoltaic component is connected with the grid-connected inverter system through the power controller, output of the grid-connected inverter system and grid current are connected to simultaneously supply power to load, the power controller enables a photovoltaic power generation system to be in a variable power output state and dynamically adjusts output power of the photovoltaic power generation system according to changes of the load, the current detection device detects magnitude and phase position of the grid current as current feedback control signals of the grid-connected inverter system, and the reverse-power protector is positioned between the microgrid and an outer grid to stop the microgrid from transmitting current to the outer grid. The system is free of a storage battery energy storage system, the outer grid is only a supplement when the microgrid is in power shortage, and power transmission to the outer grid is effectively avoided, so that effects of electricity saving can be realized without upgrading power transmission networks and power distribution networks, and popularization is facilitated.

A static CT (computed tomography) scanner system comprises a power system, an X-ray source system, a detector system, a data acquisition system and a computer. The detector system is used for receiving X-ray beams emitted by the X-ray source system, the data acquisition system is connected with the detector system, the computer is connected with the data acquisition system, the power system is respectively connected with the X-ray source system, the detector system and the data acquisition system, the X-ray source system comprises a plurality of X-ray source modules based on carbon nanotubes, the X-ray source modules are evenly distributed on an annular rail, a collimator is disposed below each X-ray source module correspondingly, the detector system comprises a plurality of detector modules, the detection faces of the detector modules form a ring and are parallel to the annular rail, and the X-ray source system is capable of projecting emitted X-ray beams to the detection faces of the detector system through slits among the collimators. The static CT scanner system is simple in structure and short in run-down time.

A method for detecting a foreign object in a wireless power transmitter, which wirelessly transmits power to a wireless power receiver through a resonant circuit comprised therein, according to one embodiment of the present invention may comprise the steps of: measuring the strength of power transmitted through the resonant circuit in a power transmission step; receiving, from the wireless power receiver, a feedback packet comprising information on a receive power strength; determining whether the information on the receive power strength is normal; when it is determined that a received power strength corresponding to the information on the receive power strength is abnormal, correcting the received power strength by applying a predetermined offset thereto; calculating a path loss on the basis of the measured strength of the transmitted power and the corrected received power strength; and detecting a foreign object by comparing the calculated path loss with a path loss threshold.

There is provided a hydraulic transmission control system for a vehicle having an automatic engine stop/restart function. The hydraulic transmission control system includes a transmission having a power transmission element, an oil pump driven in synchronism with the engine to generate an oil pressure, a pressure regulator valve that regulates the oil pressure and supplies the regulated oil pressure to the power transmission element so as to allow power transmission through the power transmission element, and a control unit that operates the pressure regulator valve to control the oil pressure supplied to the power transmission element to a higher value when the vehicle is shifted from an automatic engine stop state to an automatic engine restart state, than that when the vehicle is in a normal driving state.

An industrial robot (10) comprising three power transmission units (21, 22, 23) arranged concentrically and three drive means for driving the three power transmission units, respectively, is disclosed. The drive means for at least one of the three power transmission units includes two motors (31, 34). Also, all of the three power transmission units and the three drive means are desirably built into the base (15) of the industrial robot. This configuration makes it possible to have high-duty operation with a comparatively compact structure.

A screw engagement portion between a pulley and a shaft is provided with a thread in a direction to increase the tightening torque when the pulley is driven. A breakable part broken by the axial tension produced when the tightening torque acting on the screw engagement portion is above a predetermined value, is also provided. The stress to break the breakable part is mainly a tensile stress. The tensile stress is substantially uniformly distributed in a cross section and, hence, the stress distribution of the breakable part can be relatively precisely predicted and analyzed. Consequently, the necessity of determining aspects of the breakable part, such as dimension, material, and the like, by trial and error is reduced. The breakable part can be broken without being subject to fatigue fracture.

A vehicle 1 has a torque coupling 8, which is located in a driving power transmission system for transmitting the torque of an engine 2 to front and rear wheels 13f, 13r. The torque coupling 8 changes the torque distribution by adjusting the frictional engaging force of an electromagnetic clutch 16. The vehicle 1 also has a 4WD ECU 21 (CPU), which controls the operation of the torque coupling 8 based on the driving state. The 4WD ECU 21 (CPU) estimates a transfer case oil temperature Tptu. When the transfer case oil temperature Tptu is higher than or equal to a first predetermined transfer case oil temperature KTptu1, the 4WD ECU 21 executes overheat prevention control. When the deviation ΔA between an estimated vehicle acceleration Ae, which is computed based on a predetermined vehicle weight M and a driveline torque τd of the engine 2, and the actual vehicle acceleration Av is greater than or equal to a first predetermined deviation KΔA1, the 4WD ECU 21 (CPU) estimates the transfer case oil temperature Tptu to be higher. This allows the control mode of the torque coupling 8 to be smoothly switched to the overheat prevention control.

The invention relates to a rear axle arrangement for a heavy vehicle, e.g. a freight vehicle. The vehicle incorporates a number of wheels which bear the vehicle and an elongate chassis element which extends in the longitudinal direction of the vehicle. The rear axle arrangement incorporates at least one separate rear axle unit which includes a loadbearing frame structure and two of said wheels. The frame structure extends between a first end region and a second end region in the longitudinal direction of the vehicle and the first end region of the frame structure is designed to be connected to the elongate chassis element. In addition, the two wheels are suspended on the frame structure.

The invention discloses a pneumatic ice storage air conditioning device for downhole rescue. The pneumatic ice storage air conditioning device comprises a mechanical refrigeration module consisting of a compressor, a safety valve, an oil separator, a condenser, a liquid storage device, a drying filter, a liquid spraying valve, a thermal bypass valve, a gas-liquid separator, a stop valve and the like, an ice storage box module consisting of liquid sight glass, a thermal expansion valve, an ice storage box, a stop valve and the like, a gas path module consisting of a compressed air source, an air filter, a pressure release valve, an atomized lubricator, a pneumatic motor, a flow adjustment valve, a pneumatic condensation fan, a muffler and the like, and a cold release module of a compressed air steel bottle, an adjustment hand valve, a pressure adjuster, a pneumatic fan, a muffler and the like. The pneumatic ice storage air conditioning device for downhole rescue is high in refrigeration efficiency; downhole compressed air is used as an air source, and no power supply is needed in a working process; a refrigeration system adopts a supercooling design; the system can realize continuous running, and a press does not need to be automatically controlled to be switched on and switched off; the compressor is connected with the pneumatic motor through a belt in a transmission manner; the pneumatic ice storage air conditioning device is high in assembling efficiency, and the transmission ratio is controllable.

An intelligent ground wire management device disclosed by the present invention comprises a controller, an recognition device and an upper computer, the controller comprises an upper shell and a lower shell, a liquid crystal display screen is fixedly installed on the upper shell, and a card swiping area, an input area, a power switch and a ticket outlet are arranged on the top surface of the lower shell. A card slot, a plurality of communication interfaces and a WAN interface are formed in the end, away from the upper shell, of the lower shell, the recognition device is connected with the upper computer in a wireless communication mode, and the recognition device is connected with the controller in a wireless communication mode. A data monitoring module, a control module, a data statistics module and a storage battery are arranged in the controller, and an indicator lamp used for indication is further arranged on the upper shell. According to the invention, the problems of misconnection and misdisassembly of the grounding wire caused by the fact that the grounding wire is not numbered and placed randomly are effectively avoided, personal safety guarantee is enhanced, related operation of technicians is facilitated, and safe operation of a power grid is ensured.

The notification system is applicable to a wireless power transfer system configured to transmit power in a wireless manner from a power transmission coil of a power transmission device provided in a parking space to a power reception coil mounted on a vehicle. The notification system includes a display device and a control device. When the distance between the power transmission device and the vehicle is less than a predetermined distance, a wireless communication is established between the power transmission device and the vehicle. After the wireless communication is established between the power transmission device and the vehicle, the control device performs a foreign object detection process to detect whether or not a foreign object is present above the power transmission coil. If a foreign object is detected by the foreign object detection process, the control device displays a foreign object detection image on a screen of the display device.

The invention related to a circuit breaker with an electric leakage protection function. The circuit breaker comprises a circuit breaker shell and an electric leakage test apparatus, wherein the electric leakage test apparatus comprises a sliding button, a built-in torsional spring, a metal probe and a metal circular pipe; the built-in torsional spring, the metal probe and the metal circular pipe are connected with a current-limiting resistor in series and then connected with a power supply in parallel; a use method of the circuit breaker with the electric leakage protection function comprises the following steps of step 1, performing a detection method in a normal state: 1.1, upwardly pushing a handle to realize power transmission; 1.2, performing a pressing test; 1.3, performing automatic resetting; and 1.4, performing limiting and releasing prevention; step 2, performing a method for preventing wrong power transmission in a detection state: 2.1, downwardly pulling the handle to realize power outage; 2.2, enabling the sliding button to be normally closed; and 2.3, performing automatic power outage when the handle is upwardly pushed wrongly, wherein an analog electric leakage circuit is in a switched-on state constantly, so that when the handle is upwardly pushed wrongly by an operator, a release apparatus of the circuit breaker acts to enable the circuit breaker to be in a power outage state, and the handle is restored to the downward pulling state, so as to effectively protect the maintenance staff.

The invention relates to a method for online misoperation prevention in a 35kV-110kV power grid accident voltage loss area, which comprises the following steps: intercepting a topological relation between equipment after a switch accident occurs and generating a network tidal current diagram through a built-in topological system of a power grid; according to the network tidal current diagram, taking the transformer substation with the switch accident as a starting point and taking the switch with the accident as a demarcation point of the transformer substation with possible voltage loss during inspection, judging the transformer substations with tidal current connection one by one, and when the bus line voltage of one transformer substation is inspected to drop by 90% suddenly or is lessthan 1kV, determining that the transformer substation is a no-voltage transformer substation; performing self-inspection on all the voltage-loss substations, and determining whether the voltage-loss substations have abnormal conditions or not; and when an abnormal condition exists in the transformer substation without voltage, automatically locking the remote control function of the transformer substation, and sending a control instruction which is used for confirming whether to continue locking or unlocking and contains abnormal condition information to the remote control terminal.

The invention discloses a convenient-to-operate water sample mercury steam stripping and concentrating device. The device comprises a box body in which a pushing mechanism is arranged; a second gear and a mounting plate are arranged on the pushing mechanism; stripping and concentrating equipment is arranged on the mounting plate; power equipment is arranged at the bottom in the box body; the power equipment is provided with two end-toothed discs and a transverse shaft; the transverse shaft is fixedly sleeved with a third gear; and the two end-toothed discs are meshed with each other, and one end-toothed disc is fixed to one end of the transverse shaft. According to the invention, various parts are integrated, so that a laboratory worker can conveniently and rapidly carry out air stripping and concentration operation on water sample mercury vapor, meanwhile, power transmission is conveniently controlled, the stability of the parts in the box body during movement can be well ensured, the damage caused by touch during transfer is effectively avoided, the equipment can be rapidly used, and the working efficiency and progress are improved.

A method of controlling power in a wireless power receiver to wirelessly receive power from a wireless power transmitter and transmit the power to a load, the method comprising of receiving AC power from the wireless power transmitter that receives power from a power supply device, rectifying the AC power to DC power and controlling DC power applied to the load by comparing the DC power with a threshold voltage.

A system for artificially interlocking an automatic transmission includes an engine RPM sensor and a vehicle speed sensor. A pair of ultrasonic sensors measure a relative velocity of a vehicle to a neighbor vehicle, and an angle measuring sensor measures a degree of an angle variation of a steering wheel. An ECU determines whether an accelerator pedal is erroneously operated by monitoring sensing signals of the engine RPM sensor and the vehicle speed sensor, to determine whether the accelerator pedal is erroneously operated by using sensing signals of the ultrasonic sensors, and to determine whether the accelerator pedal is erroneously operated by monitoring a signal of the angle measuring sensor. A transmission control unit (TCU) performs an artificial interlock control of the automatic transmission when a determination signal, which informs that the accelerator pedal is erroneously operated, is received from the ECU.