869 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 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.

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 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.

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.

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 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 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 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.

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 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.

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.

A measurement circuit including a power supply, a load output terminal connected to the power supply and connected to a system ground via a load, an amplifier comprising power terminals connected to the power supply, and an output terminal connected to the system ground via a measurement resistor, the amplifier is configured to supply current from the power supply to the load via the measurement resistor and the system ground producing a voltage across the measurement resistor that corresponds to the supply current through the load.

A light-emitting diode (LED) die can include a p-n junction between a p-doped semiconductor material and an n-doped semiconductor material. The LED die can include vias that can electrically power the p-n junction. The vias can optionally be electrically connected in parallel to one another. A controller can supply current to the vias to electrically power the LED die. The vias can be distributed with a density that peaks at or near a center of the LED die and decreases with increasing distances away from the peak of the density, such that when the vias are electrically powered, the LED die emits light with a surface luminance that peaks at or near the center of the LED die and decreases with increasing distances away from the peak of the surface luminance.

The present application discloses a motor control circuit, a motor control chip, and a motor control system. The motor control circuit comprises a boost-buck controller, a motor gate driver, a first switch transistor, a second switch transistor, and a third switch transistor. When detecting that a charging device is inserted and receiving a request for entering a driving working mode, the boost-buck controller controls the second switch transistor and the third switch transistor to charge a battery and distribute a power supply current to a motor; further, when detecting that the charging device is inserted and receiving a charging instruction signal, the boost-buck controller controls the second switch transistor and the third switch transistor to step down the voltage at a system voltage node to a target step-down voltage; in addition, when detecting that no charging device is inserted and receiving the request for entering the driving working mode, the boost-buck controller turns off the first switch transistor, and controls the second switch transistor and the third switch transistor to step up the voltage at the system voltage node to a target step-up voltage.

An induction heating apparatus according to one embodiment includes a working coil disposed in a position corresponding to a heating zone, an inverter circuit that includes a plurality of switching elements and supplies current to the working coil, a driving circuit that supplies a switching signal to each of the switching elements included in the inverter circuit, a current sensor that measures a resonance current value and a magnitude of resonance current flowing in the working coil, and a controller that supplies a control signal for adjusting a duty ratio and a frequency of the switching signal to the driving circuit, to drive the working coil.

The invention provides a current sharing low-ripple voltage source based on equivalent resistance negative feedback, which is characterized by comprising a common-mode filtering module, a direct-current converter module, a direct-current filtering module, a reference current module, a linear voltage regulator module based on equivalent resistance negative feedback regulation and the like. High-ripple direct-current voltage from 24V to 36V is input, and common-mode noise is suppressed through the common-mode filtering module; the direct-current converter module realizes primary voltage conversion and outputs 9V direct-current voltage; the direct current filtering module filters ripples in 9V direct current voltage; a linear voltage regulator in the reference current module provides reference; the linear voltage stabilizer module based on equivalent resistance negative feedback regulation reduces 9V direct current voltage to 5V direct current to be output, power supply current is improved through multi-path parallel connection and expansion, high ripple rejection ratio is achieved, and power output power is increased. The power density is high, output currents of the linear voltage stabilizer modules connected in parallel are balanced, the output power is large, the power supply rejection ratio is high, and the power supply is suitable for the field of precise instrument equipment power supply.

This invention discloses a method for calculating electromagnetic anomalies in fracturing fractures of a charging conductor, comprising the following steps: S1, establishing a fracture model by monitoring the well location, burial depth, fracture size, power supply current, and frequency settings; S2, calculating the formation equivalent resistivity using multi-layer profile parameters; S3, dividing the charging conductor into Nd electric dipole sources and obtaining the vector potential and scalar potential Φ of each electric dipole source at the surface; S4, obtaining the E and H values ​​of the electric dipole sources at the surface according to the electric field and magnetic field calculation formulas, determining the reference point N, and obtaining the electric field E in the MN direction. MN and magnetic field H MN S5. Based on the principle of vector superposition, the electromagnetic fields of all the segmented electric dipole sources are superimposed to obtain the electromagnetic fields before and after fracturing, and the electric field anomaly E caused by the fracturing fracture is obtained by differential calculation. a and magnetic field anomaly H a The present invention aims to construct a model of a charging conductor crack to obtain electromagnetic anomalies generated by fracturing cracks, providing a theoretical basis for electromagnetic monitoring and crack identification.

The invention belongs to the technical field of mechanical structures, and relates to a non-contact dynamic balance automatic adjusting method. The method is realized based on a dynamic balance automatic adjusting device, and the device comprises a vibration sensor, a permanent magnet, a magnetic ring and a controller, according to the device, dynamic compensation can be carried out in time according to the actual dynamic unbalance detection result of the shaft, and compensation can be further carried out by adjusting the magnitude of the power supply current of the magnetic ring after device parameters change (for example, the magnetic induction intensity of the permanent magnet is reduced). In addition, the motion state and the dynamic unbalance degree change of the shaft can be monitored through the change of the actual compensation current, when the compensation amount reaches a set value, the fault condition can be avoided through alarm reminding, and considerable safety benefits are achieved.

The utility model relates to a photographing sliding rail device which comprises a base, a control assembly, a sliding seat, a pillow block and a conductive sliding ring. An electrical module is fixedly arranged in the sliding base and electrically connected with the control assembly. The plummer block is rotationally installed on the sliding base, the plummer block is used for being connected with an electric control installation platform of the camera, and the plummer block is provided with a conductive terminal used for being in conductive contact with the electric control installation platform. The conductive slip ring is electrically connected between the electrical module and the conductive terminal of the plummer block. The control assembly and the electrical module are electrically connected to the electric control mounting platform through the conductive slip ring and the conductive terminal, so that power supply current can be output to the electric control mounting platform through the conductive terminal, and the situation that the electric control mounting platform needs to be independently equipped with a battery is avoided. And meanwhile, the control assembly and the electrical module are in wired signal butt joint with the electric control mounting platform through the conductive terminals, so that the problem that the synchronous control accuracy among different actions is insufficient due to signal delay is avoided, and the experience feeling of the photographing slide rail device is ensured.

A method is described for operating at least two laser devices for generating a display, in which the at least two laser devices generate a sequence of light points. In a first step, a first one of the sequence of light spots is generated during a first period of time by at least one of the at least two laser devices and a voltage drop across the at least one of the at least two laser devices is detected within the first period of time. A target brightness is then determined for a second of the sequence of light points for at least one of the at least two laser devices. Subsequently, a supply current and / or a turn-on time is determined during a second time period for generating the target brightness for the at least one of the at least two laser devices.

Injection molding machine (10), comprising: a mold closing / clamping motor (160) that moves a mold closing / clamping unit (100) to perform mold closing / clamping of a mold unit (800); a drive unit (721) that supplies power to the form-closing / clamping motor (160); a changeover switch (730) provided in a wire (722) connecting the mold closing / clamping motor (160) and the drive unit (721), which is capable of switching between supplying and stopping the current from the drive unit (721) to the mold closing / clamping motor (160), and which is capable of switching between not activating a brake of the mold closing / clamping motor (160) and activating the brake; and a digital circuit (711) connected to the changeover switch (730) and controlling the changeover switch (730), wherein the digital circuit (711) controls the changeover switch (730) based on the detection of a trigger signal to stop the mold closing / clamping motor (160) in order to perform the feed stop and activation of the brake, the digital circuit (711) controls the feed stop of the switch (730) and the activation of the brake after waiting for a waiting period that is set from the time at which the trigger signal is detected, and The waiting time is set to be equal to or longer than the time in which pressure relief is completed from a state in which the forming unit (800) is pressed by the forming closing / clamping unit (100).

The disclosure relates to a method for operating a drive train for a working machine, in which a working drive of the working machine is driven by a first electric motor via a first gear arrangement, a travel drive of the working machine is driven by a second electric motor via a second gear arrangement and, in a shifting procedure of the second gear arrangement, the rotational speed of the second electric motor is synchronised and the temperature of said second electric motor is recorded. In the disclosed method, the rotational speed is synchronised by supplying current to the second electric motor, and in the event of a threshold temperature being exceeded, at least one measure is carried out to relieve the thermal load of the second electric motor. The disclosure further relates to a corresponding drive train and to a working machine.

Steering control device (200) comprising: a control current calculation unit (210) that calculates an initial control current for a steering wheel based on acquired steering information; a resistance calculation unit (220) that calculates an internal resistance based on a detected internal temperature; a supply current estimation unit (230) that estimates a supply current of a battery (100) based on the internal resistance, the first control current and an input supply voltage of the battery (100); and a control current application unit (240) that compares the supply current with a preset reference current, changes the first control current into a second control current by reducing it by a decrement if the supply current is greater than the reference current, and applies the second control current to a steering motor (500); wherein the second control current is a current reduced by a predetermined value compared to the first control current.

This suppresses power waste caused by discharging residual charge. [Solution] The emitter 10 of the distance measuring device 1 for measuring the distance to an object comprises a transmitting unit that outputs a transmission wave to irradiate the object, a capacitor 120 that is charged by a power supply and supplies current to the transmitting unit, a switching element 150 that controls the current flowing to the transmitting unit, a drive circuit that controls the switching element, and a control unit 180 that, after irradiating with a transmission wave, sends a control signal to the drive circuit to continuously irradiate with a transmission wave of an irradiable distance according to the residual charge of the capacitor 120.