3524 results about "Power circuits" patented technology

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 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.

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 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.

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 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 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 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.

The invention relates to the technical field of welding, and provides a low-load voltage circuit and a lithium battery welding machine. The circuit comprises a main control module, a voltage detection unit, a switching circuit, a pulse modulation unit and a current sampling feedback unit. The voltage detection unit monitors the end voltage of a welding gun of a welding machine in real time, the switching circuit limits the output voltage to be smaller than a safety threshold value of 36 V in a no-load mode, and a built-in bidirectional thyristor achieves isolation of a high-voltage loop and a low-voltage loop. The pulse modulation unit adjusts the on-off frequency of a main power loop, and the current sampling feedback unit dynamically adjusts the pulse duty ratio so as to accurately control the welding current. The lithium battery welding machine integrates the circuit and is provided with a welding gun assembly, a main transformer and a power supply module, the electric shock risk is effectively reduced, and the welding quality and efficiency are improved.

A power supply circuit having a current control mechanism is provided. The power supply circuit includes a charging driver, a plurality of input current processing circuits, a charging circuit and a control circuit. The charging driver includes a plurality of switch components and a driver circuit. The control circuit controls the plurality of input current processing circuits respectively to switch the plurality of switch components. At least one of a plurality of input currents that are supplied by a plurality of external input power sources flows to the driver circuit through at least one of the plurality of switch components. The driver circuit transmits the at least one of the plurality of input currents to the charging circuit, and drives the charging circuit to use the at least one of the plurality of input currents to charge an electronic device.

The invention relates to a multi-parameter compensation type combustible gas detection method and system based on a thermal conductivity coefficient principle. The method comprises the following steps: measuring heat conductivity coefficient change of target gas by using a thermal conductivity detector to calculate gas concentration; the environment isolation technology is adopted to maintain constant temperature and humidity in the detection cavity; collecting data through an embedded processor, and dynamically correcting a gas concentration calculation result based on a pre-trained compensation algorithm model; and executing grading alarm control according to the compensated concentration value. The compensation algorithm model adopts a BP neural network model based on a particle swarm optimization algorithm. The system comprises a power supply circuit, a communication interface, a thermal conductivity sensor module, a constant temperature and humidity detection cavity, an embedded processor, a compensation algorithm module and a linkage control module, and a software multi-task hierarchical scheduling framework is also constructed. The device is suitable for hydrogen detection, and can effectively improve the accuracy and reliability of gas detection.

The invention discloses an LDO (Low Dropout Regulator) circuit based on a level conversion and pre-adjustment module. The LDO circuit comprises a reference source, an error amplifier, a pre-adjustment module, a level conversion module, a power switch tube P1, a power circuit tube N1 and resistance feedback networks R1 and R2. The pre-adjustment module carries out voltage reduction processing on an input high-voltage power supply, and the level conversion module generates bias voltage according to an enable signal and the high-voltage power supply, controls a power switch and a switch in the operational amplifier, and ensures that the circuit is resistant to high voltage and extremely low in drain. The error amplifier adjusts the grid voltage of the power circuit according to the feedback and reference voltage difference value, and controls the current to stably output the voltage. And the resistance feedback network realizes closed-loop regulation of the output voltage. Under the condition that the LDO is enabled to be closed, the power tube can be ensured to be completely closed no matter the LDO is under the working voltage of 3V or 5V, so that the electric leakage condition of the LDO is greatly improved, and the LDO has the characteristic of low electric leakage.

The invention discloses an intelligent crane control method and system based on digitization, and belongs to the technical field of intelligent crane control, and the method comprises the steps: employing an AS5600 magnetic encoder to accurately recognize the angle change of an operation handle, improving the data transmission rate and the anti-interference capability through a CAN bus communication protocol, and combining a non-contact magnetic induction technology to reduce the energy consumption. Troubleshooting and maintenance are simplified through modular design, and the standby power consumption of the system is reduced through combination of a non-contact magnetic induction technology and a low-power-consumption circuit design; the control system is divided into independent functional units through the modular design, and the cable consumption is reduced through standardized interfaces; the CAN bus replaces a multi-core cable and is integrated with a photoelectric isolation and self-checking mechanism, so that the wiring complexity is reduced; the modular design supports rapid fault positioning and plug-and-play maintenance, and the labor cost is reduced; and through module unique ID tracing and a triple detection mechanism, the product quality consistency is ensured, a closed-loop optimization production process is formed, and the comprehensive operation cost is further reduced.

The invention provides a control system for suppressing peak of output voltage and current of a power amplifier. The system comprises a PS signal processing module, a PL signal processing module and a high-voltage power circuit, wherein the PS is configured to receive a bus signal issued by an upper computer, execute digital Gaussian filtering processing on the bus signal and then transmit the bus signal to the PL signal processing module; meanwhile, relevant data of the power amplifier are collected and uploaded; the PL signal processing module is configured to receive a signal which is issued by the PS and is subjected to digital Gaussian filtering processing, and pre-process the signal; and transmitting the processed signal to a high-voltage power circuit to control the high-voltage power circuit to execute power conversion operation on the load. According to the method provided by the invention, smooth transition is realized at the phase jump position of the signal by adjusting the parameters of the digital Gaussian filter, so that the peak of the output voltage and current of the power amplifier is inhibited, the stress of a post-stage high-voltage power circuit device is reduced, the post-stage output power is effectively improved, and the stability of the power amplifier is improved.

The invention discloses a constant-current electrical stimulation system with impedance monitoring and a use method thereof. The system comprises a main control unit, a digital isolator, a voltage-controlled constant current source circuit, a current acquisition circuit, an impedance detection circuit, a main power supply circuit, a power supply isolation module, a secondary power supply circuit, a booster circuit, an interaction host and the like which are connected in order. Safe and reliable pulse electrical stimulation output with adjustable parameters is provided, human tissue impedance and real-time current during stimulation are monitored in real time, an interaction host can display related information, and a user is warned when impedance or current is abnormal, so that accurate and safe electrical stimulation is realized.

A soft-start circuit for soft-starting a main power circuit, the main power circuit being configured to receive an input voltage and to generate an output voltage, the soft-start circuit can include: an auxiliary power supply circuit configured to receive the input voltage, and to generate a first voltage; where the auxiliary power supply circuit is configured to supply power to a control circuit of the main power circuit based on the first voltage; and where during a startup phase of the main power circuit, the auxiliary power supply circuit is configured to charge an energy storage capacitor of the main power circuit based on the first voltage.

The invention discloses an electronic device and a voltage leakage circuit, the electronic device comprises a control circuit and a power circuit, the control circuit is connected with the power circuit and is used for controlling the power circuit to perform leakage or stop leakage, and the control circuit comprises a voltage division circuit; the comparison circuit is connected with the voltage division circuit and is used for receiving the first voltage from the voltage division circuit and comparing the first voltage with a preset reference voltage; the driving circuit receives the first reference voltage, is connected with the comparison circuit and the power circuit, and is used for outputting the first reference voltage to the power circuit when the first voltage is greater than or equal to the reference voltage so as to control the power circuit to discharge; one end of the hysteresis circuit is connected with the power circuit, the other end of the hysteresis circuit is connected between the voltage division circuit and the comparison circuit, and the hysteresis circuit is used for increasing the first voltage when the driving circuit outputs the first reference voltage to the power circuit. The power circuit is controlled through the voltage division circuit, the comparison circuit and the driving circuit, the cost can be reduced, and the occupied space is small.

The invention provides a power supply regulating device and a voltage-adjustable power supply circuit thereof, and relates to the technical field of power supply regulation, the circuit is additionally provided with a sampling resistor, an operational amplifier unit and an MCU on the basis of keeping the original sampling partial voltage, and adjustable analog level output by the MCU is injected into a DC-DC feedback pin after being subjected to operational amplifier gain, so that the voltage-adjustable power supply circuit is formed. The potential of a feedback node is biased in a voltage superposition mode, so that the output voltage and the analog level are in an approximately linear relation; according to the invention, higher resolution adjustment can be obtained in a preset full range only by changing the DAC level or the PWM duty ratio, the gear intervals are uniform, digital potentiometers or segmented switching are not needed, the calculation is simple, the hardware cost is low, and the control is convenient. The high-precision power supply can be widely applied to occasions requiring a software controllable high-precision power supply, such as a thermal printing head test fixture, ink-jet head ink quantity control, motor torque adjustment and the like. The invention aims to solve the problems that the resolution of a low-voltage section is suddenly reduced and the fineness is insufficient due to resistance-voltage nonlinearity during wide-range voltage regulation of a traditional digital potentiometer type DC-DC feedback network.

The utility model discloses a power supply circuit and a power line carrier communication module, and relates to the power line carrier communication and power supply technology field, the power supply circuit comprises a capacitor circuit and a boost circuit, the input end of the boost circuit is electrically connected with the discharge end of the capacitor circuit, and the output end of the boost circuit is electrically connected with the power supply input end; the input end of the step-down circuit is electrically connected with the power supply input end, and the output end of the step-down circuit is electrically connected with the charging end of the capacitor circuit; the detection end of the voltage detection circuit is electrically connected with the power supply input end, and the voltage detection circuit is used for detecting the voltage of the power supply input end; the signal receiving end of the control circuit is electrically connected with the output end of the voltage detection circuit, and the control end of the control circuit is electrically connected with the controlled end of the booster circuit; the control circuit, the booster circuit and the step-down circuit are all integrated in the same chip; the utility model aims to solve the problem that the size of the existing power supply circuit is large.

The utility model discloses a power output distribution device of a power supply circuit. The power output distribution device comprises a control unit; the at least one input end is connected with the control unit, and the at least one output end is connected with the control unit; the power circuit with at least one pair of input end and output end is directly connected with the data line or is connected with the data line through a control switch, or the power circuit with at least one pair of input end and output end is directly connected with the data line or is connected with the data line through a control switch; and the control unit obtains input power through each input end, redistributes the obtained input power according to the output power required by each output end, and outputs the distributed input power to each output end. According to the utility model, under the condition that the performance and compatibility of the original power supply device or power adapter are not changed, the practicability and application range of the original product are expanded by adjusting the voltage range, expanding the output port and intelligently and controllably distributing the output power again.

The invention provides a power circuit control method, electronic equipment and a computer readable storage medium. The power circuit includes a target sampling point. The method comprises the following steps: determining a first compensation parameter according to a first sampling value, a preset first given parameter and a first loop control model when the first sampling value output by sampling a target sampling point by a first sampling circuit is obtained; determining a compensation given parameter according to the first given parameter and the first compensation parameter; when a second sampling value output by sampling the target sampling point by a second sampling circuit is obtained, determining a control signal according to the second sampling value, the compensation given parameter and a second loop control model, and controlling the power circuit based on the control signal; the sampling frequency of the first sampling circuit is lower than that of the second sampling circuit, and the first sampling value and the second sampling value are sampling values of the same type. The method can give consideration to sampling precision and response speed, and control precision is remarkably improved.

The invention relates to an electric leakage suppression system for an alternating-current power system, and the system comprises a variable-frequency compensation control module which adjusts the frequency and signal amplitude in a circuit according to the equipotential characteristics of a power utilization loop of the power system, so as to match the load characteristics and achieve the dynamic fixation of the signal amplitude; the real-time monitoring module is used for monitoring the frequency, current and voltage of the power system; the central processing unit is used for processing data from the monitoring module, executing data analysis and identifying frequency and current changes under the condition of electric leakage or electric shock; and the electric leakage suppression module is connected with the real-time monitoring module, is provided with a mechanism which is automatically activated when frequency and current are detected to be abnormal, and is used for dynamically adjusting circuit response to suppress leakage current. And the modules are connected in parallel to the power utilization loop, perform rapid self-adaptive modified modulation compensation on the parallel frequency resonance of the load loop, and dynamically adjust the current phase and amplitude so as to realize the zero potential difference of the target load end and the current suppression on the target load, and form the suppression and shielding effects on the leakage of the circuit.

The invention relates to the technical field of electronic circuits, and discloses a power supply circuit, a chip and electronic equipment. The output end of the power supply circuit is connected with the input end of a load circuit, and the power supply circuit comprises a control module, a combined switch module and an adjusting module. Wherein the control module is used for outputting a switch control signal to the combined switch module; the combined switch module is used for switching to a corresponding target switch mode according to different switch control signals; and the adjusting module is used for correspondingly adjusting the input voltage of the power supply circuit according to the target switching mode, so that mode switching of boosting the input voltage of the power supply circuit by different multiples can be realized, and the boosting efficiency is improved.

The invention discloses a minimum working voltage value testing method and device, a medium and equipment. The method comprises the following steps: acquiring an initial working voltage value and a preset step value of a circuit to be supplied with power; and based on the initial working voltage value and a preset step value, performing iterative calculation by using a dichotomy, and determining the minimum working voltage value of the circuit to be supplied with power. By adopting the scheme, the test time of the minimum voltage value of the normal work of the circuit can be shortened, so that the test efficiency is improved.

The invention provides a control device of a power switch tube and a power conversion device, and relates to the technical field of power electronics. According to the invention, the parasitic capacitor in the power switch tube is rapidly charged by the first resistor with a small resistance value, so that the rising time of the voltage between the grid electrode and the source electrode in the power switch tube is shortened; and by introducing the auxiliary module, when the voltage between the grid electrode and the source electrode in the power switch tube reaches the turn-on voltage, the auxiliary capacitor in the auxiliary module is equivalently connected to the two ends of the parasitic capacitor in parallel, so that the total capacitance value is increased, the voltage rising speed of the parasitic capacitor is slowed down, and the switching speed is reduced. Therefore, when the power switch tube is switched on, the switching speed can be reduced by adjusting the equivalent parallel connection mode of the auxiliary capacitors, the EMI requirement is met, the parasitic capacitor can be rapidly charged through the first resistor with the small resistance value, the rising time of the voltage between the grid electrode and the source electrode in the power switch tube is shortened, and the performance of the power circuit is improved.

The present application relates to a charging circuit, a power supply circuit, an electronic device, and a power supply system. The charging circuit (10) comprises a resonant circuit (110) and a transformer circuit (120); the transformer circuit (120) comprises a primary coil, and a plurality of secondary coils having dotted terminals connected to each other; and an external power supply device can be isolated from first loads (20) by means of the coupling between the primary coil and each secondary coil. The charging circuit (10) can be connected to a plurality of first loads (20) by means of the plurality of secondary coils, and non-dotted terminals of two adjacent secondary coils can independently output two first power supply voltages so as to provide electric energy to different first loads (20).

An induction cooktop comprises a cooktop surface, induction heating coils beneath it, a power supply with power semiconductors for the induction heating coils, and an external electrical connection. The power supply is located on a power circuit board, and the electrical connection is located on a connection circuit board. At least one cooling device is also provided, comprising at least one fan with a fan inlet for intake and a fan outlet for exhaust air to cool the power supply, a cooling air duct, and at least one heat sink to which the cooling air duct leads. In a vertical direction perpendicular to the cooktop surface and to one of the circuit boards, the fan is positioned lower than the heat sink.The connection circuit board runs below the power circuit board, the connection circuit board has an electrical connection to the outside, and the cooling air duct runs with a bend and deflection of 90° or 180° between the fan outlet and the heat sink.