6482 results about "Power circuits" patented technology

A display device includes: a display operable in a landscape mode and a portrait mode; a stand and including a power circuit configured to receive external power, a first battery, and a charging and discharging circuit configured to control charging and discharging of the first battery; and one or more processors configured to: control the charging and discharging circuit to charge the first battery using the external power, based on a user command for turning on the display being received, provide a portion of the external power to the display as first driving power, and control the charging and discharging circuit to provide another portion of the external power to the first battery as charging power, where the one or more processors are configured to provide output power of the first battery to the display as second driving power in a battery priority use mode.

The invention provides a multipath solid-state power controller detection device and method, and belongs to the technical field of integrated testing and fault diagnosis, and the device comprises an MCU control circuit module which is used for achieving the full-process automatic control and data analysis of the testing device; the load control module is used for controlling a load environment provided in a test process; the data acquisition circuit module is used for acquiring an SSPC channel, a switching value, a small voltage signal and a current signal; the power circuit module is used for providing power; the communication interface circuit module is used for communicating with the outside; and the display screen and key circuit module is used for man-machine interaction in the detection process. According to the detection device, SSPC all-condition performance verification is realized through multi-channel synchronous excitation, distributed data acquisition and dynamic loading; the core pain points of low test efficiency and difficult fault positioning of the multi-channel SSPC board card are solved.

The invention discloses an electronic load system, a power supply test method, an electronic device and a storage medium, and relates to the technical field of electrics. A main control circuit can provide a reference voltage for a current sampling and control circuit, and can also obtain load current setting parameters; the current sampling and control circuit determines a control voltage mainly by acquiring a sampling voltage and comparing the sampling voltage with a reference voltage so as to control an on-resistor in the power circuit through the control voltage and further control the magnitude of the current passing through the on-resistor, and meanwhile, the change rate of the current can be controlled due to a load current parameter. Therefore, the rapid change of the load current can be realized. Therefore, the technical problems of how to realize the rapid change of the current and improve the accuracy of the test result can be solved, and the technical effects of meeting the rapid change requirement of the current and improving the test result are achieved.

The present invention discloses a prediction method for a crosstalk spike in a half bridge of current-source inverter with silicon carbide devices, where, the prediction method includes calculation of the crosstalk voltage spike in the circuit of current-source type double-pulse test and analysis of the effect of each parameter on the magnitude of the crosstalk spike. The prediction method of the present invention analyzes the horizontal conduction crosstalk mechanism between the gate-source junction of the MOSFET caused by the high-frequency switching action of the silicon carbide (SiC) MOSFET and the SiC Schottky diode connected in series, and derives the prediction model for the crosstalk voltage spike in the half-bridge of current-source inverter. Based on the equivalent circuit of the current-source-type double-pulse test and the crosstalk-induced mechanism, the extreme value of crosstalk voltage spike is accurately predicted, which is helpful to analyze the effects of the drive circuit and the parameters of the power circuit on the crosstalk voltage spike through the prediction model.

The invention discloses a low-output-ripple automatic-current-sharing interleaving buck converter and a control method thereof.The converter comprises a main power circuit and an auxiliary compensation circuit, and the main power circuit adopts two interleaving main branches to achieve voltage conversion and energy transmission; automatic current sharing of the circuit is realized through the integrated network switch module and PWM signal control; the auxiliary compensation circuit adopts a current mirror image compensation principle, and adjusts the magnitude of the compensation current by comparing the difference between the output current of the main power circuit and the reference current, so as to effectively suppress the output current ripple; the control method comprises the steps of output voltage monitoring, PI adjustment, duty ratio modulation and a complementary control mechanism, current ripple phase offset is ensured, and the system stability and efficiency are improved. Compared with the prior art, the method has the advantages that the complexity of a control system is reduced, the working efficiency is improved, the current ripples are effectively eliminated, and the method has relatively high practical value and popularization prospect.

The invention discloses a high-power all-gallium nitride LED driving power supply circuit which comprises an EMI filtering and rectifying circuit, a GaN active power factor correction circuit, a GaN half-bridge LLC resonant converter circuit and a GaN synchronous rectifying and filtering circuit. The PFC and LLC combined control module integrates a power factor correction function and a resonance circuit frequency regulation function, the GaN active power factor correction circuit is connected with the PFC and LLC combined control module to realize power factor correction, and the GaN half-bridge LLC resonant converter circuit is connected with the PFC and LLC combined control module to realize output power regulation; and a constant-current voltage-limiting feedback circuit for outputting current and voltage detection feedback is arranged between the GaN synchronous rectification filter circuit and the PFC and LLC combined control module. The advantages of high efficiency of the GaN switching tube and high working frequency of the circuit are utilized, so that power loss and heat dissipation requirements are reduced, and the efficiency and power density of the LED power supply are improved. The invention has the advantages of high efficiency, high power density, high reliability and the like.

A power circuit for a computer system is disclosed. The power circuit includes a voltage regulator circuit and a pull-down circuit. While activated, the voltage regulator circuit generates a particular voltage level on a regulated power supply node. In response to the voltage regulator circuit being deactivated, the pull-down circuit couples a first resistor between the regulated power supply node and a ground supply node. After a period of time has elapsed since the deactivation of the voltage regulator circuit, the pull-down circuit decouples the first resistor, and couples a second resistor, whose value is greater than the first resistor, between the regulated power supply node and the ground supply node.

An integrated circuit for a power supply circuit that generates an output voltage from an AC voltage. The power supply circuit includes a full-wave rectifier circuit rectifying the AC voltage, a filter receiving the rectified voltage, an inductor receiving a voltage from the filter, and a transistor controlling an inductor current flowing through the inductor. The integrated circuit is configured to switch the transistor, and comprises: a terminal configured to receive a first voltage corresponding to a sum of a first current, which flows from the filter to a ground, and the inductor current; and a switching control circuit configured to turn on the transistor in response to the inductor current becoming smaller than a predetermined value, and turn off the transistor such that a peak value of the sum and the rectified voltage have waveforms that are in phase, and are proportional in amplitude, to each other.

A vacuum machine has a deck, an interface to attach to a tractor, sidewalls from the deck, an opening for pulling in air and insects, a first plenum having a lower periphery enclosing the opening through the deck and a height, a fan assembly having a fan housing with a lower periphery joined to the upper circumferential edge of the first plenum, the fan assembly having a first fan driven by a motor, fan adapted to draw air upward, through the first plenum, perforated panels in the second plenum for killing insects, one or more ultrasonic transmitters positioned in a structural element on a forward portion of the vacuum machine, oriented to transmit in a direction of the vacuum machine; and power circuitry coupled to the one or more ultrasonic transmitters providing electrical power producing an ultrasonic wave projecting forward in the direction of travel of the vacuum machine.

An image capturing apparatus includes an image sensor, a power supply circuit, and a power storage device. A charging unit charges the power storage device using power from the power supply circuit. A control unit performs control such that in a first operation state of the image capturing apparatus, power is supplied from the power supply circuit to the image sensor without power being supplied from the power storage device to the image sensor. The control unit further performs control such that in a second operation state of the image capturing apparatus in which a maximum power consumption of the image sensor is higher than in the first operation state, power is supplied from the power supply circuit and the power storage device to the image sensor.

The utility model discloses a motor controller power supply framework and a new energy vehicle, and relates to the field of new energy vehicles, and the motor controller power supply framework comprises a plurality of power supply modules, a protection module, an upper bridge power supply circuit and a lower bridge power supply circuit. A plurality of redundant power supply modules are arranged, the upper bridge and the lower bridge of the driving circuit for driving the power modules are separated, and independent power supply of the upper bridge driving circuit and the lower bridge driving circuit is realized through the upper bridge power supply circuit and the lower bridge power supply circuit; the motor control module can still control the drive circuit to enter a safe state when a single-point failure condition exists in a power supply framework, so that the problem of overvoltage damage of a power module and a bus capacitor caused by power loss of a system is avoided, and the operation safety is improved.

The invention belongs to the technical field of semiconductor device packaging, and discloses a power semiconductor module three-dimensional stacking vertical commutation low-inductance packaging structure. The two vertical commutation structures are stacked and integrated on the same substrate; different from traditional two-dimensional packaging in which all elements are laid on a two-dimensional plane, three-dimensional stacked packaging suitable for power devices is proposed for the first time, and power loops are stacked and integrated; the magnetic fluxes of the stacked power loops are cancelled, so that ultra-low inductance (pH level) integration is realized; under the condition that the areas of the substrates are the same, the capacity of the module is doubled; meanwhile, dynamic current sharing design is considered, and one driving chip simultaneously drives eight GaN chips to realize parallel dynamic current sharing for the first time; the method is suitable for various topological structures including half-bridge structures, full-bridge structures, three-level ANPC structures and the like; the method is suitable for various packaging schemes, including PCB on DBC packaging, DBC substrate welding / sintering packaging and embedded packaging. Taking the packaging of the half-bridge module double-sided parallel PCB on DBC as an example, low-inductance, low-thermal-resistance and high-power-density integration is realized.

Power monitors, power supply circuits, and methods for operating a power supply. The method includes determining a voltage of a power rail provided to a load device from the power supply. The method also includes detecting that the voltage of the power rail is greater than or equal to an over-voltage threshold. The method further includes incrementing an over-voltage counter when the voltage of the power rail is detected as being greater than or equal to the over-voltage threshold. The method also includes detecting that the over-voltage counter is equal to a threshold value. The method further includes generating an interrupt signal when the over-voltage counter is detected as being equal to the threshold value.

The invention relates to the technical field of power supply, in particular to a power supply circuit with low energy consumption and high stability. According to the low-energy-consumption and high-stability power supply circuit provided by the invention, the starting circuit is controlled by a voltage signal provided when the external power circuit works normally to output a high-level starting signal, so that the current detection circuit and the internal control circuit are started to work; when the current detection circuit works, voltage signals provided by the parameter adjustment circuit and the power switch tube control the current detection signal generation circuit to output a current detection signal, and the internal control circuit controls the working state of the power switch tube based on the current detection signal in the working state to realize power supply; parameters of circuit elements of the parameter adjusting circuit are adjusted, so that energy consumption of the current detection circuit is reduced while the parameter adjusting circuit provides a large voltage signal, the battery power supply circuit is prevented from being mistakenly triggered to be turned off, and stability and reliability of the battery power supply circuit are ensured.

The invention relates to a semiconductor power module, and belongs to the technical field of device packaging. The module comprises a heat dissipation bottom plate, an insulation substrate, a metal layer, a power terminal, a signal terminal, a chip and a temperature sensing resistor. The insulating substrate is arranged on the surface of the heat dissipation bottom plate, the metal layer is arranged on the surface of the insulating substrate, and the power terminal, the signal terminal, the chip and the temperature sensing resistor are all arranged on the insulating substrate and electrically connected with the metal layer. Part of chips form a lower bridge in the middle area of the insulating substrate, the other part of chips form upper bridges on the two sides of the lower bridge, and the number of the upper bridge chips is equal to that of the lower bridge chips. The power terminals, the upper bridge chip and the lower bridge chip jointly form power loops which are equal in size and opposite in direction in the power module. According to the invention, the problems of over-high temperature of individual chips caused by non-uniform current distribution and electromagnetic interference caused by over-large parasitic parameters can be solved.

The invention provides a gateway power supply circuit, a circuit board and edge gateway equipment, relates to the technical field of electronic circuits, and solves the problem of poor stability of the edge gateway equipment in the related art. The gateway power supply circuit realizes real-time monitoring of a main power supply voltage, and once it is detected that the main power supply voltage exceeds a preset safety range, the edge gateway equipment can be switched off. When the power supply fails, the system immediately triggers a power supply switching mechanism and seamlessly switches to the auxiliary power supply to supply power, so that the downtime of equipment caused by power supply failure is greatly shortened, and the continuity and the stability of the system are ensured. And when the power supply is suddenly interrupted, the power supply of a key circuit can be quickly cut off, and the power supply can be used as a back-up power supply to quickly provide electric energy support through a high-performance super capacitor, so that key data is not lost, and the data safety and integrity of the system are effectively protected.

A multi-phase resonant power converter includes: a power stage on a primary side of the multi-phase resonant power converter, the power stage including bridge converter legs each configured to receive an AC input voltage and implement a separate phase of the power converter; a transformer device having a primary side winding for each bridge converter leg and a secondary side winding for each primary side winding; a power circuit electrically connected to the secondary side windings on a secondary side of the multi-phase resonant power converter; a primary-side controller configured to operate the bridge converter legs at a switching frequency; and a separate resonant tank electrically connected to a midpoint of each bridge converter leg. Each resonant tank includes a resonant capacitor in series with the primary side winding for that bridge converter leg. A resonant frequency of each resonant tank is tuned to within + / −50% of the switching frequency.

A cooktop appliance is provided. The cooktop appliance includes an induction heating system having an induction heating element, a power supply circuit, a battery assembly, and a controller. The induction heating element is operable to inductively heat a load with a magnetic field. The power supply circuit includes an inverter and is coupled to an alternating current (AC) power supply configured to supply a power signal to the induction heating system. The battery assembly is coupled to the power supply circuit via a switching element and is configured to provide a supplemental power signal to the induction heating system. The controller is operably coupled to the power supply circuit and the battery assembly and is configured to control operation of the induction heating system based, in part, on a power requirement of the induction heating system that corresponds to a total power output required by the induction heating system.

The present description concerns a converter comprising an AC-DC conversion stage comprising a first thyristor, a first power supply circuit delivering a first reference voltage between a first node and a second node, and a second power supply circuit delivering a second reference voltage between third and fourth nodes, the cathode of the first thyristor being coupled to the first node of the first power supply circuit by a first switch and being connected to the fourth node, the second power supply circuit comprising a first rectifying element coupled to the second node of the first power supply circuit and coupled to the third node.

A control circuit controls a power supply circuit to generate transmitting power having a frequency varying within a frequency range. The control circuit determines a stably transmitting frequency based on a detected output voltage of a power receiver apparatus, the stably transmitting frequency indicating a frequency of the transmitting power at which dependency of the output voltage on a load value of the power receiver apparatus is at least locally minimized within the frequency range. The control circuit determines a transmitting voltage based on the detected output voltage, the transmitting voltage indicating a voltage of the transmitting power at which the output voltage reaches a target voltage when generating transmitting power having the stably transmitting frequency. The control circuit controls the power supply circuit to generate transmitting power having the stably transmitting frequency and the transmitting voltage.

Voltage command values are set according to voltage fluctuations of a plurality of power supply sources, and one of outputs from a plurality of power supply circuits which output DC voltages obtained by performing conversion according to the voltage command values is supplied to a power conversion circuit as control power so that the system can be continuously operated even at the time of an abnormality due to a device failure and a power outage, and control power consumption can be suppressed in the case of voltage fluctuations of the power supply sources.

The invention provides a synchronous zero voltage modulation system and method of a cascade system, a medium and equipment wherein the synchronous zero voltage modulation system of the cascade system comprises a power circuit module and a modulation system; the power circuit module comprises a front-stage four-switch buck-boost converter and a rear-stage LCC-LCC compensated bidirectional wireless charging system; the modulation system comprises a voltage compensation module, a current compensation module, a current comparison module, a synchronization module and a switch driving signal generation module, the output end of the voltage compensation module is connected with the input end of the synchronization module, and the output end of the current compensation module is connected with the input end of the synchronization module. The output end of the current comparison module is connected with the input end of the synchronization module, and the output end of the synchronization module is connected with the driving signal generation module. According to the invention, a plurality of time scales are adopted, the implementation condition of synchronous zero-voltage switch modulation is accurately calculated, the calculation speed is high, the memory occupation amount is small, and the zero-voltage switch synchronous modulation of the cascade system is realized.

The invention provides a self-powered circuit of a switching power supply and the switching power supply, and the self-powered circuit comprises a first linear voltage stabilizing circuit which is connected between a common connection end of a main power tube and an auxiliary power tube and a power supply capacitor; the second linear voltage stabilizing circuit is connected with the second linear circuit in parallel; the adjusting circuit is connected with the second linear voltage stabilizing circuit and generates adjusting voltage to adjust the first charging current flowing through the second linear voltage stabilizing circuit when the second linear voltage stabilizing circuit is switched on; wherein after the switching power supply is started, the first linear voltage stabilizing circuit is switched on, and the power supply capacitor is charged; and when the PWM signal generated by the control chip of the switching power supply is effective, the second linear voltage stabilizing circuit is controlled to be switched on. According to the invention, power supply loss can be saved and system EMI can be optimized.

An uninterruptible power supply includes an input configured to be coupled to a renewable power source and an energy storage component configured to receive and store energy and to provide stored power. Power circuitry is configured to receive the renewable power and the stored power and provide output power to a load. A controller coupled to the power circuitry determines whether an amount of available renewable power exceeds the output power level provided to the load and, if so, provides excess power from the renewable power to the stored energy component.

A charging system includes three charging stands, an exhaust heat pipe provided underground, and a heat utilization device that utilizes exhaust heat. The charging stand has an opening and an exhaust heat port. The exhaust heat port is connected to an exhaust heat pipe. Cooling air taken in through the opening exchanges heat with a power supply circuit of the charging stand, and is then discharged from the exhaust heat port into the exhaust heat pipe. The temperature of the cooling air discharged into the exhaust heat pipe is raised by heat exchange with the power supply circuit. The cooling air flows through the exhaust heat pipe and is supplied to a heat utilization device.

Embodiments herein relate to ear-worn devices that can be used to locate other devices such as mobile electronic devices. In a first aspect, an ear-worn device is included having a control circuit, a microphone in electrical communication with the control circuit, an electroacoustic transducer for generating sound in electrical communication with the control circuit, a motion sensor in electrical communication with the control circuit, and a power supply circuit in electrical communication with the control circuit, wherein the ear-worn device is configured to issue a location command to a mobile electronic device and wherein the location command triggers the mobile electronic device to emit a locating signal. Other embodiments are also included herein.

The invention relates to the technical field of power system monitoring, and discloses a power circuit breaker state monitoring and recording system and method based on a signal processing algorithm, and the system comprises a data collection module which is used for collecting the real-time operation data of a power circuit breaker, and storing the real-time operation data as a monitoring record; the signal preprocessing module is used for preprocessing the real-time operation data by using a filtering and denoising algorithm before the state of the power circuit breaker is analyzed; the state analysis module is used for performing state analysis on the preprocessed data based on PLC program optimization and a signal processing algorithm so as to judge the working state of the power circuit breaker; and the recording module is used for recording and storing the analyzed state of the power circuit breaker for subsequent query and analysis. The working state of the circuit breaker can be accurately judged, and potential faults can be found in time, so that electric power accidents are effectively prevented, and the stability and the safety of an electric power system are improved.

The utility model discloses an AC-DC conversion circuit and a charging device, the AC-DC conversion circuit comprises a power factor correction circuit, a DC / DC conversion circuit and an auxiliary power supply circuit, the auxiliary power supply circuit comprises an auxiliary source power supply circuit, a flyback converter, a controllable switch and a control module, and the auxiliary source power supply circuit is connected in parallel between the positive output end and the negative output end of the power factor correction circuit; the flyback converter is connected in parallel with the auxiliary source power supply circuit, and the primary side midpoint is connected with the midpoint of the auxiliary source power supply circuit; one end of the controllable switch is connected with the midpoint of the output bus of the power factor correction circuit, and the other end is connected with the midpoint of the auxiliary source power supply circuit; the input end of the control module is connected with the output end of the DC / DC conversion circuit, the output end of the control module is connected with the control end of the controllable switch, and the control module is used for controlling the controllable switch to be switched off under the condition that the electrical parameters meet preset conditions. Therefore, when the charging module is in light load, voltage regulation is performed on the power factor correction circuit bus, and when the charging module is in heavy load, failure of the auxiliary source is avoided.

A high-integration-level carrier plate includes at least two prefabricated printed circuit board lamination layers, at least one hollowed-out area is formed in the printed circuit board lamination layer, the hollowed-out areas are embedded in the carrier plate, the printed circuit board lamination layers are fixedly connected through an insulating bonding dielectric layer and are electrically connected through at least one bonding material piece, and at least one power supply circuit assembly is arranged in the hollowed-out area; the printed circuit board lamination layer comprises at least a part of windings, and the windings and the magnetic cores are used for forming magnetic elements in the power supply circuit assembly through mutual cooperation.

A power electronics converter includes a substrate and a converter commutation cell including a power circuit. The power circuit includes at least one power semiconductor switching element and at least one capacitor. Each power semiconductor switching element is comprised in a power semiconductor prepackage. An electrical connection side of the respective power semiconductor prepackage is spaced apart in a z direction from the substrate so as to define a prepackage gap between the substrate and the electrical connection side. At least a portion of the prepackage gap is filled with an electrically insulating material having voids. A converter parameter σ defined as an insulation fill factor divided by a maximum void size is greater than or equal to 10 / mm. The insulation fill factor is defined as a cumulated volume of the voids subtracted from a volume of the electrically insulating material divided by the volume of the electrically insulating material.