1612 results about "Supply current" patented technology

Air conditioning device (1) for motorhomes, comprising: - at least one first heat exchanger for exchanging heat with the air circulating through it; - a cooling circuit (8) for a cooling fluid, with a path passing through the first heat exchanger; - a compressor (7) which includes an electric motor, for circulating the cooling fluid in the cooling circuit (8); - a power supply unit that can be connected to an external power supply to receive an electrical input current or electrical input power and to generate a variable supply voltage to drive the electric motor with an electrical supply current, - a controller (11) connected to the power supply unit that is suitable for receiving input data representative of a reference value of the electrical input current or electrical input power and that is programmed to adjust the power supply unit to generate the supply voltage with a reference amplitude and / or frequency such that the electrical input current or electrical input power is below the reference value; - a positioning device designed to determine the position of the air conditioning device (1); and - a memory containing a plurality of reference values ​​corresponding to a plurality of locations, wherein the controller (11) is capable of receiving a location signal from the positioning device and of setting as input data one of the reference values ​​present in the memory depending on the location signal.

A circuit arrangement and to a method for operating the circuit arrangement, particularly a circuit arrangement for the DC power supply of a plurality of parallel electrolysers, where the circuit arrangement has a rectifier which converts an input-side alternating voltage into an output-side first DC voltage. Each electrolyser is respectively connected in parallel to the output of the rectifier by a down converter converting the first DC voltage into a second DC voltage such that the second DC voltage drops over the electrolyser. Each of the down converters is controllable and / or regulatable in order to adapt the level of the second direct voltage.

The invention relates to the technical field of power supply current waveform adjustment. The power supply current waveform self-adaptive adjustment method comprises the steps of obtaining real-time operation information of a power supply, analyzing the real-time operation information through a load trend recognition algorithm, judging whether the load state of the real-time operation information changes or not, obtaining a judgment result, and determining the current waveform of the power supply according to the judgment result. And if the judgment result is that the load state is changed, predicting a target current output waveform matched with the current load state by using the trained current prediction model based on the real-time operation information, and performing real-time adjustment on the output current of the power supply according to the target current output waveform to obtain a power supply output result. According to the invention, the self-adaptive adjustment effect of the current waveform is realized.

Methods and systems are provided for an electric heavy-duty vehicle. In one example, the vehicle includes a battery pack for supplying current to an electric motor of the vehicle, the battery pack arranged in a chassis of the vehicle and configured to form part of a floor of the vehicle. The vehicle also includes a motor coupled to front wheels of the vehicle, the front wheels having hub assemblies housing drive shaft adapters configured to permanently couple the hub assemblies to drive shafts of the front wheels, and a cradle configured to be mounted with electrical sub-systems of the vehicle.

The present application relates to the technical field of power supply circuits, and discloses a current backflow prevention circuit, a dual power supply current backflow prevention circuit, and an electronic device. The current backflow prevention circuit includes: a conduction control module, a voltage hysteresis comparison module; the voltage hysteresis comparison module, the two input ends of which are respectively connected to the first end and the second end of the conduction control module, and the output end is connected to the third end of the conduction control module; the voltage hysteresis comparison module is used to compare the voltage of the first end and the voltage of the second end of the conduction control module after connecting to the power supply, and output a corresponding level signal according to the comparison result; the conduction control module is arranged in the power supply path between the power supply and the load, and is used to conduct the first end and the second end when receiving a level signal of a first state, so as to conduct the power supply path; when receiving a level signal of a second state, the first end and the second end are turned off to turn off the power supply path. The present application can prevent the load from backflowing the current of the power supply.

The invention relates to the technical field of repulsive force switches, and particularly discloses a repulsive force mechanism buffer device based on magnetorheological fluid, which comprises a piston type magnetorheological damper, a magnet exciting coil, a displacement sensor and a control system, the magnet exciting coil is wound on the outer surface of a piston assembly of the piston type magnetorheological damper; the piston type magnetorheological damper adjusts the rheological property of magnetorheological fluid through a magnetic field generated by the magnet exciting coil. The displacement sensor is used for detecting the movement of a repulsive force disc in the repulsive force mechanism; the excitation coil and the displacement sensor are electrically connected with the control system; the control system regulates the power supply current intensity of the magnet exciting coil at least according to detection information of the displacement sensor; according to the repulsive force mechanism buffering device based on the magnetorheological fluid, the magnet exciting coil is used for generating a magnetic field, discharging control is conducted on the coil through the capacitor, and therefore real-time adjustment of the magnetorheological fluid damper is achieved, impact and vibration of the repulsive force mechanism are effectively reduced, the operation stability of equipment is improved, and the service life of the equipment is prolonged.

The invention provides a current detection and circuit protection method and system for a chip, and relates to the technical field of chips, and the method comprises the steps: obtaining a current detection result of a target chip; comparing the current detection result with a preset current threshold value, if the target chip is over-current, adaptively determining a multi-gear protection grade corresponding to the comparison result according to the comparison result of the current detection result and the preset current threshold value, and determining a corresponding protection strategy based on the multi-gear protection grade; according to the protection strategy, an adjustable current limiting module in a power supply circuit of the target chip is controlled to gradually recover the power supply current of the target chip in stages, and whether the current detection result exceeds the preset current threshold value or not is judged when each recovery stage is ended; and if so, returning to the previous recovery stage to continue recovery until the power supply current of the target chip is recovered to the normal working state within the preset recovery time.

The invention discloses a multi-mode perovskite and laminated cell comprehensive test system and method. The system comprises a darkroom, a test platform, an LED light source module, a CCD camera, a laser, an adjustable constant current source, an electronic load and an upper computer. The darkroom is used for shielding external ambient light and providing a dark test environment; the test platform is installed in the darkroom, and a to-be-tested battery is placed on the test platform; the LED light source module is used for providing a test light source; the CCD camera is used for capturing an optical signal generated by the battery to be tested in the testing process; the laser is used for emitting a laser beam to excite the to-be-detected battery to generate a specific optical response; the adjustable constant current source and the electronic load module can be electrically connected with a to-be-tested battery on the test platform, the adjustable constant current source is used for supplying current to the to-be-tested battery, and the electronic load module is used for simulating different load conditions; and the upper computer is used for realizing intelligent control of the test process and processing and display of test data.

The invention discloses an intelligent charging control method and system and an intelligent control socket, and the method comprises the steps: obtaining the charging state data of charging equipment, and drawing a first charging current curve; when a plurality of charging devices are charged at the same time, the first charging current curves of all the charging devices are accumulated based on time, and a total charging current curve is determined; determining the part, greater than the rated current of the power supply line, of the total charging current curve as a first power supply current curve, and determining a corresponding first time interval; dividing the first time interval into a plurality of second time intervals; adjusting the charging current of each charging device in each second time interval based on the rated current of the power supply line; and after all the second time intervals are analyzed, determining a second charging current curve of each charging device, and adjusting the output current of the corresponding intelligent control socket. According to the invention, the charging stability is improved by adjusting the charging current of the multiple charging devices.

A leakage current detection and interruption device for a power cord includes a switch module that controls an electrical connection of first and second power supply lines because input and output ends; a leakage current detection module, including first and second leakage current detection lines, which respectively detect leakage current signals on the first and second power supply lines and generate self-test fault signals in response to the first and second leakage current detection lines having an open circuit; and a drive module including at least one solenoid, a first semiconductor device forming a first current path from the first to the second power supply line when conductive, and a second semiconductor device forming a second current path from the second to the first power supply line when conductive, to supply current to the solenoid which in turn drives the switch module to disconnect the electrical connection.

A control method of a dual active bridge converter, an energy storage device and a readable storage medium, the control method comprising: determining a feedforward value of an external phase shift angle and an adjustment value of the external phase shift angle according to an electrical parameter of the dual active bridge converter; and controlling the energy conversion of the dual-active bridge converter according to the feed-forward value of the external phase shift angle and the adjustment value of the external phase shift angle. When the dual active bridge converter performs energy conversion according to the generated driving signal, the feed-forward value of the external phase shift angle can be actively adjusted based on the target alternating current so as to adjust the given value of the external phase shift angle, so that the given value of the external phase shift angle can change along with the change of the target power supply current; therefore, the generated driving signal can actively adjust the output actual alternating current in time, and the purpose of reducing the output current or voltage waveform oscillation of the dual-active bridge converter is achieved.

The present invention relates to a method for producing an ionization rod and an ionization rod produced according to the method. The invention is characterized in that in a U-shaped duct profile (1) a main line (4) for supply current is placed, in that from this main line branch lines (3) are connected with adjacent carbon fibre brushes held in protective sleeves and in that a thermosetting plastic are laid into the duct profile covering the main part of the protective sleeves.

The invention discloses an intelligent detection system for identifying aging of a charging pile circuit and an intelligent charging pile thereof. An intelligent detection system for identifying aging of a charging pile circuit comprises a power supply conversion module used for converting a high voltage into a power supply which can be used by a circuit aging detection and defect processing device; the current detection module is used for detecting the current change of the circuit in real time; a microcontroller module; and a Bluetooth transmitting module. The intelligent charging pile comprises the intelligent detection system. According to the intelligent detection system for identifying the circuit aging of the charging pile, the current change of the circuit in the charging pile can be monitored in real time, data are analyzed by using an intelligent algorithm, and the circuit aging condition is identified in time. According to the intelligent charging pile, flaws on the surface of the connecting line can be detected in the winding and unwinding process of the connecting line of the charging gun, then the flaws are temporarily and automatically processed, shutdown is not needed before formal manual maintenance, the labor cost and the time cost are reduced, and potential safety hazards of equipment are isolated.

A rotational atherectomy device includes an elongate flexible shaft and an abrasive element connected to a distal end of the elongate flexible shaft. A handle includes a housing that includes an electric motor operatively connected to the elongate flexible shaft to rotate the elongate flexible shaft. A power source is electrically connected to the electric motor for supplying power thereto. A controller is configured to monitor a motor supply current of the electric motor and monitor a speed of the electric motor using a signal from a sensor. If the motor supply current is above a first predetermined threshold, the controller reduces a speed of the electric motor while attempting to maintain motor supply current of the electric motor. Then, if the motor supply current is above a second predetermined threshold higher than the first predetermined threshold, the controller stops the electric motor.

The invention provides an optimized winding method and system for a high-frequency transformer winding. A comprehensive parameter database based on current density distribution data of a high-frequency switching power supply is established, the axial temperature of a winding layer is collected in real time in combination with a self-calibration multi-axis winding device, and tension and interlayer gap compensation parameters are generated through temperature gradient feedback. The tension parameter drives the machine to adjust the winding tightness, and the gap parameter optimizes the heat dissipation channel. And synchronously fusing the current distortion data of the LLC resonant topology and an electromagnetic field simulation result, and generating a resonant frequency adjustment signal to suppress abnormal high-frequency current distribution. And dynamic matching of winding tightness, current distribution and heat dissipation requirements is realized through cooperative control. According to the system, electromagnetic, mechanical and thermal field multi-dimensional linkage is adopted, the skin effect and hot spot concentration are reduced, the temperature rise gradient is balanced, and the high-frequency working condition stability is enhanced. According to the technical scheme, through electromagnetic, mechanical and thermal field cooperative regulation and control, the temperature rise peak value of the high-frequency winding is greatly reduced, and the efficiency is greatly improved.

The invention relates to the field of fault detection, and discloses a display screen power supply fault detection method and system, which is used for solving the problem that early warning is mistakenly touched due to environment temperature change during display screen power supply fault detection, and comprises the following steps: acquiring power supply temperature data, power supply current data and power supply voltage data in real time; evaluating to obtain a temperature stability coefficient, a current stability coefficient and a voltage stability coefficient, performing first fault judgment, evaluating to obtain a power supply fault index if the first fault judgment judges that the current power supply does not have a fault, performing second fault judgment, and acquiring an environment temperature in real time if the second fault judgment judges that the current power supply has a fault; the fault threshold value is dynamically adjusted in real time according to the environment temperature, the fault adjustment threshold value is obtained, third-time fault judgment is carried out, if it is judged that the current power supply breaks down, related workers are prompted that the power supply breaks down, and the accuracy of fault detection is effectively improved.

Disclosed is a test device to test the operation of an MMC by fabricating only one or several SMs constituting the MMC testing under real-time operating conditions. The test device for a modular multi-level converter (MMC) includes a simulation model of an MMC having at least one arm to which sub modules (SMs) are serially connected, at least one test target SM among the serially connected SMs being replaced with a dependent voltage source; an arm current simulation circuit including an equivalent SM that implements the test target SM as actual physical hardware and an inverter that supplies current to the equivalent SM; and a control unit configured to control the arm current simulation circuit to correspond to an operation of the simulation model and set a voltage corresponding to a charge / discharge voltage of the equivalent SM of the arm current simulation circuit to the dependent voltage source.

A power supply control apparatus controls power supply from a DC power source to a load by switching on or off a power supply FET. The current adjustment circuit adjusts the current flowing through the resistor circuit to a value obtained by dividing the voltage between the drain and the source of the power supply FET by the resistance value of the resistor circuit. A drive circuit switches off the power supply FET when a voltage across the detection resistor exceeds a predetermined voltage. The on-resistance value of the power supply FET fluctuates according on the ambient temperature of the power supply FET. The resistance value of the resistor circuit fluctuates in the same direction as the on-resistance value according to the ambient temperature of the power supply FET.

Disclosed are exemplary embodiments of control circuits for supplying current to actuate solenoids, such as refrigerant valves in HVAC systems, other valves, “solenoid” style contactors, other coil driven actuators, etc. In exemplary embodiments, a control circuit for supplying current to actuate a solenoid comprises a solenoid coil and a switch coupled with the solenoid coil. The control circuit may be configured such that the solenoid coil is operable as a load coil and a switch mode supply coil and such that the switch is configured to operate a load and power supply of the control circuit. Additionally, or alternatively, the control circuit may include a current monitoring shunt and a flyback diode that are located in a circulating current loop defined by and / or including the solenoid coil, the current monitoring shunt, and the flyback diode.

The invention provides a current sharing method for multiple power supply racks, which can be applied to the technical field of server power supply current sharing. The current sharing method comprises the following steps: a master controller detects the number of first current power supply units in a plurality of first power supply units and a first total current output quantity, receives the number of second current power supply units in a plurality of second power supply units from a slave controller and a second total current output quantity, and determines a current mean value, a current-sharing signal including a current average value is synchronously issued to the master controller and the plurality of slave controllers; the main processor detects a heartbeat signal of the main controller, controls the first switch module to disconnect the electric connection between the main controller and the plurality of first power supply units and controls the second switch module to disconnect the electric connection between the main controller and the fourth switch module under the condition that the heartbeat signal is not detected within a preset time period; and the second switch module is electrically connected with the plurality of first power supply units and the fourth switch module so as to realize the function of the main controller.

The invention relates to the technical field of power management control, in particular to a power management control system of a thermal infrared detection system. The power supply conversion and distribution unit is used for converting an external power supply into multiple paths of voltage and distributing the voltage for the first time; the voltage monitoring stability control unit monitors the power supply voltage state of each module in the system in real time; the current protection current limiting unit monitors a power supply current state in real time; the dynamic load regulation unit uses an entropy weight optimization load regulation technology to monitor the entropy change of load fluctuation and the power supply of a priority weight dynamic regulation module in real time; and the redundant power supply switching unit predicts the state change of the main and standby power supplies by using a nonlinear predictive switching optimization technology to optimize a switching path, and performs power supply switching according to the switching path and the switching time. The power supply management control system of the thermal infrared detection system dynamically distributes power supply resources through an entropy weight optimization load adjusting technology, and seamless switching of a main power supply and a standby power supply is realized through a nonlinear prediction switching optimization technology.

A connector that enables electronic assemblies to be efficiently configured for any of multiple power requirements. The connector may have multiple interfaces such that when the connector is mounted to a printed circuit board (PCB), it may receive power through an interface and distribute it to components on the PCB through another interface. The connector may also have an interface that supports a connection to a conductive interconnect, which may distribute power to a second connector mounted to the same PCB. Power may be distributed to components mounted to the PCB without passing through the mounting interface of the first connector. As a result, the current density in the PCB adjacent the first connector is reduced relative to current density required to supply current to all components through the mounting interface of the first connector. The PCB may have fewer layers than a conventional PCB assembly supporting comparable functionality.

Provided is a contactless electronic system configured for contactless communications with a reader over an electromagnetic field and comprising a power supply, a current monitor, a processing system comprising a hardware processor configured for performing operations, a dynamic extra current loader and a clock generator, wherein the power supply includes a clamp circuit, and wherein, continuously until the end of an execution phase of said hardware processor. The current monitor is configured for determining the maximal current Imax that can be provided by the power supply to the processing system from the electromagnetic field by comparing a current into the clamp circuit to at least one predetermined threshold. Other embodiments disclosed.

A charging system includes a first device; a second device; and a power adjustment device including a DC-to-DC conversion unit; and a micro-control unit for receiving a charging instruction, a first power information of the first device and a second power information of the second device and performing the following steps: controlling the DC-to-DC conversion unit to convert a first supply current received by the first device into a first charging current according to the first power information and the second power information when the charging instruction instructs the first device to charge the second device; and controlling the DC-to-DC conversion unit to convert a second supply current received by the second device into a second charging current according to the first power information and the second power information when the charging instruction instructs the second device to charge the first device.

The present application relates to a circuit for measuring resistance, comprising: a combined constant current source and constant voltage source for providing a constant supply current and a supply voltage, respectively, the supply current being less than or equal to 1 ampere; the resistor to be measured and the reference resistor are connected with each other in series and are electrically connected with the constant current source or the constant voltage source respectively; the load signal conditioner and the reference signal conditioner are electrically connected with the resistor to be measured and the reference resistor respectively; the two-way synchronous AD conversion module is electrically connected with the load signal conditioner and the reference signal conditioner respectively; the controller is electrically connected with the two-way synchronous AD conversion module; and the gear switcher is electrically connected with the controller and is used for switching between the constant current source and the constant voltage source. According to the circuit for measuring the resistance, the mode of combining the constant voltage source and the constant current source is adopted, and the resistance can be measured in a self-adaptive and high-precision mode in an ultra-wide range.

The invention provides an expansion board card, a peripheral equipment safety detection device, a peripheral equipment safety detection method and a medium. The expansion board card comprises a first expansion connector, a microcontroller, a first power supply connector, a current monitoring chip, a storage chip, an input and output expansion chip and a peripheral equipment slot, the voltage output end of the power connector is connected with the microcontroller, and peripheral equipment is connected to the peripheral equipment slot; the current monitoring chip is connected with the microcontroller based on a current interface, the input and output expansion chip is connected with the microcontroller based on an input and output expansion interface, the peripheral equipment slot is connected with the microcontroller based on a peripheral equipment interface, and the storage chip is connected with the microcontroller based on a storage interface. The microcontroller is connected with the first expansion connector based on the microcontroller interface. And a function of monitoring the power supply current of the board card to the peripheral equipment and obtaining the current state of the expansion board card are added, so that a hardware basis is provided for realizing the safety detection of the peripheral equipment.

The invention relates to a synchronous electric machine (10) for an aircraft, comprising a stator (13) comprising two sets of stator coils (47, 49) intended to be connected to different power converters and a wound rotor (38) inserted in the stator, and comprising a rotor shaft (11) and two rotor coils (39, 40), each rotor coil is intended to be supplied by a different supply current. The two sets of stator coils are arranged in the stator such that when a first set of stator coils (47) fails, a second set of stator coils (49) cooperates with at least a second rotor coil (40) powered by an associated supply current to generate a mechanical torque on the rotor shaft, and such that the power converter connected to the first set of stator coils does not deliver any electrical power.

A system and method for locating magnetic material. In one embodiment the system includes a magnetic probe; a power module in electrical communication with the magnetic probe to supply current to the magnetic probe; a sense module in electrical communication with the magnetic probe to receive signals from the magnetic probe; and a computer in electrical communication with the power module and the sense module. The computer generates a waveform that controls the supply of current from the power module and receives a signal from the sense module that indicates the presence of magnetic material. The magnetic probe is constructed from a material having a coefficient of thermal expansion of substantially 10−6 / ° C. or less and a Young's modulus of substantially 50 GPa or greater. In one embodiment magnetic nanoparticles are injected into a breast and the lymph nodes collecting the particles are detected with the probe and deemed sentinel nodes.

The utility model provides a detection circuit and a detection system which are applied to the technical field of power electronics, the detection circuit is used for testing a current sensor in an inverter, the detection circuit comprises a main control circuit and the inverter, the inverter comprises two or more inverter bridge arms, and the main control circuit is connected with the inverter bridge arms. Each inverter bridge arm comprises a first power switch device and a second power switch device which are connected in series, the input end of the inverter is connected with a detection power source, and the current sensor is connected with the first power switch device of one inverter bridge arm in parallel. The main control circuit is connected with the control ends of the first power switch device and the second power switch device of each inverter bridge arm, controls the first power switch device connected with the current sensor in parallel to be switched off and controls one of the second power switch devices to be switched on, so that the current sensor is communicated with a detection power supply, and the detection power supply is switched off. The inverter is used for converting electric energy of the detection power supply into current, detection current is provided for the current sensor, and the accuracy of a detection result is effectively improved.

A voltage generator including an LDO (low dropout) regulator that supplies a current to an internal voltage node of a sense amplification circuit as feedback control based on a voltage level of the internal voltage node; and a power switch circuit including a plurality of power switches each having one end connected to an external voltage and an opposite end connected to the internal voltage node, and that supplies the current to the internal voltage node as feed-forward control based on a known number of sense amplifiers to be activated. The voltage generator may efficiently supply current according to an operation mode of the sense amplification circuit.