1114 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.

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.

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 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.

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.

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.

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.

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.

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.

The invention concerns a method to supply electric power to furnaces (100) for melting and / or heating metal materials (M), which provides the supply of a mains voltage (Ur) and a mains current (Ir), both having a predefined mains frequency (fr); the transformation of said mains voltage (Ur) and mains current (Ir) into selectively settable alternating secondary voltage (Us) and secondary current (Is); the rectifying of said secondary voltage (Us) and secondary current (Is) and the conversion of the direct intermediate voltage (Ui) and intermediate current (Ii) into selectively settable alternating supply voltage (Ua) and supply current (Ia); the feeding of said supply voltage (Ua) and supply current (Ia) to a plurality of electrodes (102) of the furnace (100). The invention also concerns an apparatus (10) for supplying electric power to furnaces (100) for melting and / or heating metal materials (M).

The utility model discloses a simple insulation and voltage resistance testing device, which is characterized in that all PINs in a power semiconductor module comprising a plurality of ceramic substrates are connected in series through a contact chip, a lead and a switch on an insulating plate, are cut off and grouped according to the ceramic substrates to which the PINs belong, and form a complete current loop together with a power supply, a current tester and a metal plate; according to the invention, which ceramic substrate in a power semiconductor module comprising a plurality of ceramic substrates has poor insulation points can be accurately detected in an insulation and voltage resistance test, the overall structure is simple, the manufacture is convenient, the cost is low, and in addition, the contact sheet matched with the shape of the PIN is adopted, so that the damage risk of the PIN is reduced.

The invention discloses an LNG transport ship emergency pump motor power source quick connection device and method, and belongs to the technical field of transport ship cable quick connection. The LNG transport ship emergency pump motor power source quick connection device comprises a junction box, three sets of motor cable access pipes are fixedly installed at one end of the junction box, and two sets of main power source cable access pipes are fixedly installed at the other end of the junction box; the top of the junction box is detachably provided with a junction box cover plate, the junction box is also internally provided with a power supply cable quick connection device, the power supply cable quick connection device is detachably installed in the three groups of motor cable access pipes and the two groups of main power supply cable access pipes, and the power supply cable quick connection device and the cable quick connection male and female heads are matched for use, so that the power supply cable can be connected to the junction box. The cable quick-connection male head and the cable quick-connection female head both adopt the silver coating to improve the conductivity of the contact surface, and the male head and the female head can adapt to different power supply current capacity requirements by adjusting the size, length and diameter, can adapt to all cable quick-connection requirements, and are very strong in universality.

The invention provides a power supply circuit and a dual-plane redundant power supply system, which can be applied to the technical field of power supply current sharing. The current sharing control circuit comprises an output voltage generation module used for converting an output current provided by a power supply circuit to a load into an output voltage; the current-sharing control module is used for generating a current-sharing control voltage for adjusting the reference voltage of the far-end sampling point according to a comparison result obtained by comparing the current sensing voltage with the current-sharing voltage of the current-sharing bus; the feedback voltage generation module is used for generating a feedback voltage according to the far-end feedback voltage, the near-end feedback voltage and the resonant voltage; and the voltage regulation module is used for regulating the reference voltage according to the current sharing control voltage, comparing the feedback voltage with the regulated reference voltage to obtain error voltage, and regulating the output voltage of the power supply circuit according to the error voltage.

A power converter includes a first set of switching elements and a second set of switching elements communicatively coupled with a first capacitor and a second capacitor. The controller is configured to periodically command a first operation of the first set of switches to supply current to the first capacitor for a first duration, followed by terminating a first interval of current to the first capacitor. The controller is also configured to periodically command a second operation of the second set of switches to provide current to the second capacitor for a second duration, followed by terminating a second interval of current to the second capacitor.

According to one aspect of the invention, a water heater is provided comprising an electric heating element circuit; a circuit coupled to the electric heating element circuit and configured to supply current to the electric heating element; a sensor coupled to the circuit and configured to detect a temperature associated with operation of the electric heating element circuit; and a controller coupled to the circuit. The controller is configured to perform a spike test on the operation of the electric heating element circuit by comparing a rate of change of the temperature associated with the operation of the electric heating element circuit to a positive threshold and a negative threshold; identifying a negative spike when the rate of change of the temperature associated with the operation of the electric heating element circuit is below the negative threshold indicating that the electric heating element circuit may have failed or failing operation caused by an open circuit; and identifying a positive spike when the rate of change of the temperature associated with the operation of the electric heating element circuit is above the positive threshold indicating that the electric heating element circuit may have failed or failing operation caused by a shorted circuit. The controller is also configured to perform a signature test on the operation of the electric heating element circuit by in response to identifying the negative spike, supplying or continuing to supply the current to the electric heating element for a first predetermined time period: terminating the supply of current after the first predetermined time period; and determining if a drop occurs in the temperature associated with the operation of the electric heating element circuit, indicating no failed or failing operation caused by an open circuit, or does not occur, confirming the failed or failing operation caused by the open circuit; and in response to identifying the positive spike terminating the supply of current to the electric heating element for a second predetermined time period; and determining during the second predetermined time period if an increase occurs in the temperature associated with the operation of the electric heating element circuit, confirming the failed or failing operation caused by the shorted circuit, or does not occur, indicating no failed or failing operation caused by the shorted circuit.

The invention provides a vehicle door unlocking control method and system based on a super capacitor and a storage medium, and relates to the technical field of vehicle safety. The method comprises the following steps: configuring a super-capacitor bank as a standby power supply; continuously monitoring a vehicle collision detection signal, a main power supply voltage and a main power supply current; and when the collision detection signal is effective, the voltage of the main power supply is lower than a first set value and the current of the main power supply is lower than a second set value for a preset time, the connection between the main power supply and the vehicle door unlocking system is controlled to be disconnected, the voltage conversion circuit is activated to take over the power supply of the vehicle door unlocking system, and the voltage conversion circuit is powered by the super capacitor bank. When the main power supply loses power or drops suddenly due to collision, the super capacitor bank is switched to supply power through the voltage conversion circuit, so that stable power supply support is ensured in an unlocking instruction execution stage, and the core problem that an execution mechanism cannot act due to power loss when the main power supply is abnormal in a traditional scheme is remarkably solved.

The utility model relates to a power supply circuit, a power supply chip and electronic equipment. The power supply circuit comprises a voltage conversion circuit which comprises an input end, an output end and a plurality of inductors, the input end is used for being coupled with a power supply, the output end is used for being coupled with a display driving circuit, and the voltage conversion circuit is used for converting voltage of the power supply and outputting the converted voltage to the display driving circuit to supply power to the display driving circuit; the switching circuit is coupled with at least one inductor, the switching circuit is coupled with the inductor in a one-end coupling or two-end coupling mode, the switching circuit is coupled between the input end and the output end, and the switching circuit is used for controlling the coupled inductor to be connected or disconnected between the power supply and the display driving circuit. Since the inductance affects the efficiency of the power supply circuit when the power supply current required by the display driving circuit is different, the inductance of the power supply circuit is adjusted by changing the number of the inductance between the power supply and the display driving circuit through the switching circuit, thereby improving the efficiency of the power supply circuit.

The invention belongs to the field of power source detection, and provides a computing power server power source current sharing detection device and method.The computing power server power source current sharing detection device comprises a power source detector, a guiding piece, a centering assembly, a straightening mechanism and a driving mechanism; the acquisition module comprises a Hall current sensor which is connected with an acquisition port of the power supply detector through a plurality of groups of wires; by arranging the centering assembly and the straightening mechanism, the power supply wire can be centered and fixed from the two sides of the Hall current sensor, and then the fixed power supply wire is straightened, so that the power supply wire in the through hole is in a relatively straightened state, the problem of non-uniform magnetic field distribution caused by improper position of the wire is effectively avoided, the measurement error is reduced, and the measurement accuracy is improved. Meanwhile, the straightened wire also reduces the possibility that the sensor is interfered by an external magnetic field, and further improves the accuracy and stability of current collection.

To improve power efficiency of a synchronous motor in a wide speed range from a low speed to a high speed.SOLUTION: In a pole-number switching method, the current value of AC current supplied to an armature is reduced at low speed by increasing the number of poles and increasing the torque multiplier of the electric motor, thereby reducing copper loss, and loss at high-speed rotation (mainly iron loss) is reduced at high speed by decreasing the number of poles and lowering the voltage and frequency of the AC current supplied to the armature. Furthermore, a further power-efficiency improvement effect is provided by connecting the circuit such that, during driving of the electric motor, inverter power-supply current of an armature winding becomes a power supply for a field winding, and such that, during regenerative braking, current generated from the armature winding is regenerated to a battery efficiently.SELECTED DRAWING: Figure 2

The invention discloses an intelligent communication power supply current fault classification method. The method comprises the following steps: acquiring original current data of a communication power supply system; preprocessing the original current data; extracting multi-dimensional features from the preprocessed current data; dimensionality reduction and optimization are carried out on the extracted multi-dimensional features by using a pre-trained enhanced Gap-DBN auto-encoder; a hierarchical XGBoost classification model is used to carry out current fault classification on the processed features, and a three-level classification architecture is used to refine classification results step by step. The invention further provides a corresponding system. By implementing the invention, the response timeliness of the current fault in the communication power supply system can be improved, and the accuracy of fault classification is improved.

An electrical axial flux machine, in particular for a drive train of a hybrid or fully electrically operated motor vehicle is provided. The axial flux machine includes a stator having a plurality of stator coils distributed over the circumference of the stator; power electronics for supplying current to the stator coils; and a high-voltage terminal for establishing an electrical connection between the stator coils and the power electronics. Busbars are located above the stator coils, in the radial direction. The busbars enclosing, in an annular manner, the stator and / or a rotor that can be rotated relative to the stator, and electrically conductively connecting the stator coils to the high-voltage terminal.