4761 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 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.

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 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.

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.

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.

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.

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.

The utility model discloses terminal equipment and a control panel thereof. The hardware health of a data storage unit is guaranteed. The control panel of the terminal equipment comprises a power supply circuit 1 and a plurality of loads, the plurality of loads comprise a main chip 2, a data storage unit 3, a power-off detection circuit 4 and an energy storage unit 5; wherein the power supply output end of the power supply circuit 1 is connected with each load; the power supply circuit 1 is used for receiving input of an external power supply and converting the input into voltage required by working of each load; the charging and discharging end of the energy storage unit 5 is connected with the power input ends of the main chip 2, the data storage unit 3 and the power failure detection circuit 4; the signal output end of the power-off detection circuit 4 is connected with the signal input end of the main chip 2; the power failure detection circuit 4 is used for detecting whether the external power supply is powered off or not, if not, a first signal is sent to the main chip 2, and if yes, a second signal is sent to the main chip 2; and the main chip 2 is in communication connection with the data storage unit 3.

The invention provides a digital twin unmanned aerial vehicle circuit state monitoring method and system, and the method comprises the steps: firstly collecting a partial discharge pulse sequence of an unmanned aerial vehicle switching power supply circuit, separating environment electromagnetic noise through polarization filtering operation, and extracting real discharge pulses to generate partial discharge fingerprint data; inputting the fingerprint data into a pre-established fault search tree model, judging the type of a capacitor or inductor component through a first-stage branch node, and matching a degradation mode such as capacitance attenuation or magnetic saturation through a second-stage branch node to determine the fault type; then, corresponding component parameters of the equivalent circuit model are dynamically updated in the digital twin body, and the circuit operation state change trend is simulated; and finally, according to the state change trend, predicting the residual effective working time of the fault component and outputting a monitoring result. According to the invention, the accuracy of service life evaluation of key components in a complex electromagnetic environment is improved.

The invention discloses a direct current SSPC current limiting control system and a control method thereof, and relates to the field of power electronics and electricians. The RC network generates a control voltage according to the switch control signal; the driving power amplification circuit carries out power amplification processing on the control voltage; the main power circuit conducts or cuts off the branch power distribution channel according to the processed voltage so as to provide a current path; the current-limiting state judgment circuit judges whether to enter or exit a current-limiting state according to information data fed back by the feedback circuit, and outputs a signal to the current closed-loop current-limiting control circuit; and the current closed-loop current-limiting control circuit receives the signal output by the current-limiting state judgment circuit and adjusts a control voltage corresponding to a main branch power tube in the RC network according to the SSPC channel current so as to realize constant-current control of the power distribution channel. The invention aims to improve the stability and thermal reliability of direct current SSPC current-limiting control.

A control system for a direct current (DC) microgrid is described. The control system includes a DC bus with a positive bus line and a negative bus line, DC battery circuits with a positive coupler connected to the positive bus line and a negative coupler connected to the negative bus line, switches including a control input terminal located in each DC battery circuit, a distributed generator circuit connected to the DC bus, a constant load power circuit connected to the DC bus, a computing device connected to each control input terminal, the DC bus, the distributed generator circuit and the constant load power circuit. The computing device includes an electric circuitry, a memory, and at least one processor to determine a DC bus voltage, determine the SoC of the DC battery circuits, generate PWM signals that control the DC bus voltage, and balance the SoC of the DC battery circuits.

The invention relates to the technical field of direct current motor driving, and provides a high-speed direct current motor driving system which comprises a control module, a driving module and a feedback module and is based on an analog switch and an FPGA. By implementing the scheme, in the first aspect, the two sides of the direct current motor of the middle bridge arm of the full-bridge power circuit are each connected with a sampling resistor in series, and high-precision bidirectional current measurement of the direct current motor is achieved and the reliability of a driving system is improved through full-path detection and common-mode rejection under the condition that the power extension time and power consumption are not increased; and on the second aspect, the common-mode input voltage of the operational amplifier is relatively small through the use of the analog switch and the amplitude limiting diode, and the operational amplifier is not required to be limited by high common-mode voltage, so that the type of the operational amplifier with higher response speed can be selected. And thirdly, a fault detection unit and a redundancy check unit are arranged in the FPGA, and the safety and the reliability of the system are improved through cooperative work of the FPGA, a double-sampling resistor, an amplitude limiting diode and an analog switch.

The invention provides a high-adaptability rotary cutter handle self-powered device which comprises a cutter handle, a stator retainer sleeving the lower portion of the cutter handle, a bearing, a rotor core, a winding, a permanent magnet, a stator core, a self-powered circuit board, a circuit board protection cavity, an inner cylinder, an inner cylinder outer ring annular disc and a taper shank straight groove spade drill cutter bar arranged at the lower end of a cutter handle body. Self power supply of the device is realized by adopting an electromagnetic induction principle, the winding on the internal rotor and the permanent magnet of the external stator are designed to cut magnetic induction lines to generate induced electromotive force, and the rotating kinetic energy of the rotating knife handle is converted into electric energy required by the intelligent knife handle, so that power is supplied to the intelligent knife handle. The power supply management circuit is arranged inside, and rectification, filtering voltage stabilization output, overload protection and the like can be carried out on voltage. An external power source and a wire are not needed for power supply and signal transmission of the device, the cutter handle and the cutter are not damaged, and conversion from a common cutter handle to an intelligent cutter handle can be achieved.

The invention discloses a multi-channel audio switching test circuit for a rail transit vehicle-mounted radio station and an implementation method, and is applied to the field of production test and fault maintenance of rail transit vehicle-mounted radio station equipment. Comprising a power supply circuit, an analog switch switching circuit, an audio channel switching circuit, an indicating lamp circuit, a tested equipment interface and an audio comprehensive tester interface. The audio channel switching circuit is respectively connected with the analog switch switching circuit, the tested equipment interface and the audio comprehensive tester interface; the power supply circuit is respectively connected with the indicator lamp circuit, the analog switch switching circuit and the audio channel switching circuit; the audio channel switching circuit comprises an audio switching circuit I, an audio switching circuit II, an audio switching circuit III, an audio switching circuit IV and an audio switching circuit V; according to the invention, the indexes of all audio channels of the tested equipment can be tested only through one-time equipment connection, and a tester does not need to carry out frequent line plugging and unplugging on each channel, so that the testing efficiency is greatly improved.

The invention discloses a multi-level pulse compensation type active EMI (Electro-Magnetic Interference) filter suitable for a multi-noise source switching power supply and a control method of the multi-level pulse compensation type active EMI filter. The invention provides a multi-level pulse compensation scheme based on switch behavior modeling, aiming at the problem of common-mode noise of adjacent rising edges and falling edges generated by a high-frequency switch in a multi-noise-source switching power supply. The time sequence delay and the edge slope of the compensation signal are calculated by analyzing the dv / dt characteristics in the switching-on and switching-off processes of the switching device, and accurate matching and offset with a noise source in phase and amplitude are achieved. Compensation control logic is realized by sharing a main control chip with a power circuit, and an additional controller and a high-precision sampling system are not needed; the self-adaptive tracking of the compensation amplitude is realized through the voltage following circuit; a multi-level compensation signal is output through the totem-pole circuit and injected into a common-mode path, and effective suppression of electromagnetic interference is achieved. The converter has the advantages of small size, low cost, simplicity and convenience in installation, high stability and the like, and is suitable for various multi-noise-source power electronic systems including a dual-active bridge converter, a phase-shifted full-bridge converter and an interleaving Buck converter.

The invention discloses an ion pump power supply circuit. The circuit comprises a voltage regulation output module, a control module and a current-voltage conversion module, the input end of the voltage regulation output module receives low-voltage direct-current input voltage; the high-voltage output end of the voltage regulation output module is connected with the anode of the ion pump; the ion pump shell is electrically connected with the input end of the current and voltage conversion module through the electron gun shell; the output end of the current-voltage conversion module is electrically connected with the control module; the grounding end of the current-voltage conversion module is connected with the signal ground; the voltage regulation output module converts the low-voltage direct-current input voltage and outputs high-voltage direct-current voltage to the anode of the ion pump, so that working current is generated in the cavity of the ion pump and returns to the current-voltage conversion module through the shell of the ion pump and the shell of the electron gun; the current and voltage conversion module detects working current in the ion pump cavity and converts the working current into a voltage signal; and the control module determines the vacuum degree in the ion pump cavity according to the voltage signal.

The application discloses a detection circuit used for short circuit detection of a power supply output port, comprising a short circuit detection circuit used for short circuit detection, a first port of the short circuit detection circuit is connected in series with a first auxiliary power supply circuit, a second port of the short circuit detection circuit is connected in parallel with the power supply output port, and a detection signal output by the short circuit detection circuit is input to a processor; the processor controls the power supply output port and the power supply to be in an isolated state in response to the power supply starting operation, and the detection current from the first auxiliary power supply circuit flows into the first end of the first port. Detection current flowing into the first end flows back to the first auxiliary power supply circuit through the second port, currently in the short circuit state, of the short circuit detection circuit and the second end in the first port of the short circuit detection circuit in sequence, so that the short circuit detection circuit outputs a first level signal used for representing existence of short circuit. According to the invention, short-circuit detection consumes less time, rapid residual voltage discharge can be realized, and damage to a power supply and internal components of a load is avoided.

The utility model discloses an intrinsic safety power supply circuit and a fuel electrochemical oxygen analyzer. The intrinsic safety power supply circuit comprises a first MOS tube, a first capacitor, a second capacitor, a first resistor, a first Schottky diode, a first Zener diode and a second Zener diode, the power supply module of the fuel electrochemical oxygen analyzer comprises the intrinsic safety power supply circuit and further comprises a sensor module, an AD conversion module, a key module, a single chip microcomputer module, an analog output module and a display driving module which are connected with the power supply module, and the single chip microcomputer module is connected with the AD conversion module, the key module, the analog output module and the display driving module. The sensor module is connected with the AD conversion module, and the analog output module is connected with external equipment; the fuel electrochemical oxygen analyzer adopts the intrinsically safe power supply circuit to limit the working current and voltage in the circuit so as to control the power consumption of the whole machine, so that explosion prevention is realized, and the fuel electrochemical oxygen analyzer can measure the oxygen concentration in a flammable and explosive environment.

This substrate production device comprises a work unit, a housing, a motor drive fan, a first power supply circuit, and a second power supply circuit. The work unit performs a substrate production action. The housing accommodates the work unit. The motor drive fan ventilates the inside of the housing. The first power supply circuit actuates during the operation of the device when the substrate production action is performed, and supplies power to the work unit and the motor drive fan. The second power supply actuates during the shutdown period of the device when the substrate production action is not performed, and supplies power to the motor drive fan.

The present application provides a vertical power supply system. The vertical power supply system comprises a processor, a main board, and a vertical power circuit. The vertical power circuit comprises a PB carrier board and PB modules. The processor is connected to a first surface of the main board by means of a plurality of first fixing members, and the PB carrier board is connected to a second surface of the main board by means of a plurality of second fixing members. The plurality of second fixing members are in one-to-one correspondence with the plurality of first fixing members, and the second fixing members are connected to the first fixing members corresponding thereto by means of via holes in the main board. Each PB module is connected to the PB carrier board by means of a plurality of third fixing members, and the PB module is used for converting an input power source into a target power source. The target power source passes through the plurality of third fixing members, the PB carrier board, the plurality of second fixing members, the via holes in the main board, and the plurality of first fixing members to supply power to the processor. By means of the technical solution of the present application, transmission loss during power supply can be reduced, thereby achieving good heat dissipation for the power supply system.

The invention provides a floating power supply, a circuit system and electronic equipment. The floating power supply comprises a voltage drop bias unit, a bias current source, a power supply transistor, a first voltage stabilizing transistor and a second voltage stabilizing transistor, the voltage drop bias unit carries out fixed voltage drop on an external input power supply according to the bias current of the bias current source to obtain a bias voltage and outputs the bias voltage; the power transistor follows the bias voltage to obtain a power supply voltage and outputs the power supply voltage to a load from a first end of the power transistor. The first voltage stabilizing transistor and the second voltage stabilizing transistor form a current mirror structure, and the width-to-length ratio of the first voltage stabilizing transistor and the second voltage stabilizing transistor is greater than 1, so that the load current flowing through the power supply transistor is at least doubled, and the area requirement on the power supply transistor is at least doubled, namely, the influence of power supply voltage jump on the bias of the power supply transistor is reduced; therefore, rapid stabilization of the power supply voltage can be realized through a current source with smaller output, and finally low-cost and low-power-consumption power supply voltage stabilization is realized.

A system of tracking load switching operations and fault clearing operations of at least one circuit breaker in a power circuit includes at least one coil antenna sensing changes in a magnetic field around the coil antenna. The changes in the magnetic field induce corresponding changes to a current or voltage in the at least one coil antenna. A receiver is connected to the at least one coil antenna and receives the current or voltage. A computer is connected to the receiver and stores a data stream that corresponds to the changes in magnetic field around the at least one coil antenna. The computer uses the data stream to generate a plurality of characteristic magnetic field waveforms for the at least one circuit breaker. The computer assembles a low frequency magnetic signature for a respective circuit breaker from the characteristic magnetic field waveforms generated for the respective circuit breaker.

A sine half-wave generating device comprises a power supply circuit and a test circuit connected with the power supply circuit, a main loop of the test circuit is provided with a connection interface for connection of a test sample, and the test circuit comprises a current peak selection module, a control module, an output module and a waveform direction switching module. The current peak value selection module is used for changing the current peak value on the main loop, and the waveform direction switching module is used for changing the waveform generation direction on the main loop. The beneficial effects of the utility model are that the test circuit is divided into functional modules of current peak value selection, control, output, waveform direction switching and the like, a modularized residual current test system architecture is formed, and sine half-wave pulses which can be flexibly adjusted can be provided according to the performance test requirements of the residual current operated circuit breaker.

The invention discloses an automatic configuration method and system for a power supply loop, and relates to the technical field of intelligent power distribution. After a plug device is rotationally locked, an identity is read in a near field, and corresponding voltage and power templates are called; inputting the power template and bus real-time current into an edge algorithm to obtain residual capacity and generate an initial power distribution matrix; when the residual capacity is higher than a safety threshold value, a phase sequence, a breaking value and overcurrent delay are issued to the intelligent circuit breaker, and zero-voltage window spark-free closing is realized; during operation, load change is predicted, time dislocation and power coupling parameters are calculated, a peak regulation coefficient is obtained through fuzzy reasoning, and a non-critical load migration stabilizing peak value is triggered; and finally, synchronizing the identity, the power distribution matrix and peak regulation parameters to the digital twin model, and realizing self-learning, energy efficiency improvement and system stability improvement by means of a parallel simulation optimization rule and second-level multiplexing during similar access.