1868 results about "Power circuits" patented technology

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 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.

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 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 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.

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.

A power supply circuit of an embodiment includes a first transistor including a source connected to an input terminal, and a gate connected to a first node; a second transistor including a drain connected to a drain of the first transistor, and a source connected to an output terminal; a third transistor including a source connected to the input terminal, a drain connected to the first node, and a gate connected to a second node; and a Zener diode including an anode connected to the input terminal, and a cathode connected to the second node.

Provided are an audio playing module and an audio processing circuit thereof, and an electronic device, which belong to the technical field of electronics. In the audio processing circuit, by adding a feedback control circuit between a power circuit and an audio amplifier, the feedback control circuit can control, according to a change in the amplitude of an audio signal received by the audio amplifier, the power circuit to adjust a power supply voltage provided for the audio amplifier. Thus, when the amplitude of the audio signal changes, an appropriate power supply voltage can be matched for the audio amplifier by means of the feedback control circuit, thereby solving the problem of the audio playing module generating whistling when the amplitude of the audio signal changes, and thus optimizing the sound quality of played sounds.

A lighting system includes a power supply circuit configured to generate a drive signal for powering a light source based on an input power signal; a temperature sensor configured to measure a light source temperature corresponding to the light source; a current control circuit coupled to the light source and configured to adjust a current of the light source based on the drive signal and a reference signal; a channel controller configured generate the reference signal based on a dimmer setting, and to generate a compensation drive signal based on the light source temperature; and an auxiliary light configured to generate compensation light for compensating a correlated color temperature (CCT) drift in an output light of the light source based on the compensation drive signal.

The utility model belongs to the technical field of pulse power supplies, and particularly discloses a pulse power supply circuit, which comprises a power supply input module, a PWM (Pulse Width Modulation) signal input module, a feedback control module, a control chip and an output module, the power input module provides working power for the control chip and the whole circuit. The PWM signal input module is used for transmitting an external PWM signal to a signal input pin of the control chip; the feedback control module collects an electric signal in the circuit and transmits a processed feedback signal to the control chip; the control chip drives the output module to output a pulse power supply to provide electric energy for a load based on an input PWM signal and a feedback signal. According to the utility model, the feedback signal acquired by the feedback control module is compared with the reference voltage, the difference value is amplified, the control chip adjusts the duty ratio of the PWM signal according to the amplified error signal, the pulse waveform is effectively optimized, and the output stability and reliability of the pulse power supply are improved.

The invention relates to a power supply circuit with a monitoring function comprising a first current branch (2) with a first controllable section (20) and at least one load (21) arranged in series therewith, and a second current branch (3) with a second controllable section (30) and at least one load (31) arranged in series therewith. A controllable converter (4) is connected to the first and second current branches (2, 3) to supply a total current. A control circuit (5) with a control input, which is connected to the set input (10), wherein the control circuit (5) is coupled to the first controllable section (20) to adjust a current through the first current branch (2) depending on a provided first set signal.The second controllable branch (30) is coupled to the first current branch (2) and to the set input (10) in a dependent control loop, which is influenced by the current flowing in the first circuit (2) and the forward voltage of the two loads (21 and 31). It is configured to control a current through the second current branch (3) depending on an operating state through the first current branch (2) and a second set signal. Furthermore, a current-controlled monitoring circuit is provided, which is connected to a node between the respective current branch and the load connected in series with it. This circuit is configured to generate an error signal in response to a predefined deviation of one of the currents flowing into the current-controlled monitoring circuit, which reflects the state of the respective load.

The utility model, which relates to the technical field of the LED, discloses a leakage protection circuit comprising a power supply circuit, a step-down circuit, an LED circuit and a detection circuit. The input end of the power supply circuit is connected to the output pin of the power supply end, the output end of the power supply circuit is connected with the input end of the step-down circuit and the input end of the LED circuit, and the power supply circuit is used for rectifying the output power supply of the power supply end so as to output the power supply to the step-down circuit and the LED circuit; the output end of the step-down circuit is connected with the detection circuit, and the step-down circuit is used for carrying out step-down processing on the power supply output by the power circuit to output reference voltage to the detection circuit; and the detection circuit is respectively connected with the output pins of the power supply end and the LED circuit, and is used for controlling the working state of the LED circuit according to the real-time voltage difference and the real-time voltage between the output pins of the power supply end and the reference voltage output by the step-down circuit. According to the utility model, the working state of the LED circuit can be controlled according to the real-time voltage difference, the real-time voltage and the reference voltage, thereby realizing anti-creeping protection.

The utility model provides a millimeter wave isolation drive circuit and an electronic device. The drive circuit comprises a low-voltage side control module, a high-voltage side control module and a millimeter wave isolation module. The low-voltage side control module is connected with the high-voltage side control module through the millimeter wave isolation module; a power supply circuit is also included; the power supply circuit comprises an inverter, a transformer, a rectifier and a feedback adjustment module which are connected in sequence; primary coils of the inverter and the transformer are positioned on the low-voltage side; the input end of the inverter is connected with a low-voltage side power supply; a secondary coil of the transformer, the rectifier and the feedback adjustment module are located at a high-voltage side; the output end of the rectifier is also connected with the high-voltage side control module; the output end of the feedback adjustment module is connected with the low-voltage side control module through the millimeter wave isolation module; and the low-voltage side control module is also connected with the inverter. According to the utility model, the power supply design can be optimized, and the isolation performance can be improved.

A series-type hybrid circuit breaker to provide protection against short circuit faults in DC or AC power circuits. A series-type hybrid circuit breaker (SHCB) forces a fault current into a high-frequency AC current with zero crossings and allows a mechanical circuit breaker to disconnect the faulty branch. The SHCB injects a transient counter voltage pulse via a pulse transformer into the main power loop upon detection of an overcurrent condition and forces the fault current to change its original direction and cross zero to a negative peak value. A generation power electronic circuit on the primary side of the transformer controls the discharge of a capacitor to generate the counter voltage pulse during the first phase of each switching cycle of the fault interruption process. The power electronic circuit then changes the polarity of the injected secondary voltage and forces the fault current to change direction and cross zero again.

The invention provides a handheld shock wave generating system which comprises a shock wave balloon and a driving circuit, and the driving circuit comprises a primary power supply circuit, a high-voltage booster circuit, a voltage doubling circuit and a control circuit. After a voltage signal VCCS2 output by the primary power supply circuit is subjected to self-oscillation and boosting of the high-voltage boosting circuit and multiple rounds of voltage multiplication of the voltage doubling circuit, the voltage signal VCCS2 can be increased by hundreds or even thousands of times, a storage battery and a mains supply do not need to be used, miniaturization can be achieved, and carrying is convenient.

The invention relates to a visual on-load voltage regulation tap switch control system, device and medium, which comprises a single chip microcomputer control circuit, the single chip microcomputer control circuit is connected with a signal processing circuit and a power supply circuit, and the signal processing circuit is connected with a voltage zero cross detection circuit, a voltage sensor and a data acquisition unit. The voltage zero-cross detection circuit, the voltage sensor, the data acquisition unit and the power supply circuit are all connected with the isolation reduction transformer, and the isolation reduction transformer is connected with the low-voltage side voltage of the distribution transformer; the single-chip microcomputer control circuit is further connected with a switch position sensor, a communication circuit, a switch drive circuit and a thyristor trigger circuit. The communication circuit is in communication connection with a remote computer through an RS485. The method has the advantages of realizing automatic voltage regulation conversion, stabilizing voltage, accurately setting visual parameters and realizing non-impact voltage regulation.

Certain aspects of the present disclosure provide techniques and apparatus for supplying power, including short circuit protection. One example power supply circuit generally includes a switching regulator including an output coupled to a first power supply node, a battery node for coupling to a battery, a switch coupled between the first power supply node and the battery node, a first transistor including a gate coupled to the first power supply node and a source coupled to a reference potential node of the power supply circuit, and a first current source or a resistive element, coupled between a power supply rail and a drain of the first transistor. The power supply circuit may be configured to detect a short circuit on the first power supply node and trigger an automatic fault protection (AFP) mode after completion of a soft start of a voltage on the first power supply node.

A power supply circuit for an x-ray production system, which has an inverter circuit with an output for connecting the inverter circuit with an x-ray source of the x-ray production system, includes a rectifier circuit including an input to connect the rectifier circuit with a power supply network, the rectifier circuit further including an output to connect to an input of the inverter circuit; and a backup circuit including a plurality of electrical energy storage cells, the plurality of electrical energy storage cells being connectable in series between the input of the inverter circuit and the output of the rectifier circuit.

The invention discloses a self-powered synchronous rectification active bridge, a control method thereof and a power supply system. An active bridge belongs to the technical field of power electronics and comprises a full-bridge rectifying circuit composed of four switching devices, a self-powered circuit taking electricity from an alternating current input end and a control circuit. And the control circuit detects an alternating current input phase, generates a driving signal with dead time, and controls the switching device to be alternately conducted in positive and negative half cycles to realize synchronous rectification. The self-powered circuit is preferably a charge pump, and an external auxiliary power supply is not needed. Through integration of synchronous rectification, self-power supply and intelligent control, the rectification efficiency and the power density are remarkably improved, a traditional rectifier bridge is conveniently and directly replaced through the modular design, and the high-power rectifier bridge can be widely applied to high-power scenes.

A smart air ionizer is disclosed herein. The smart air ionizer includes a power circuit, a high voltage circuit, an electrode coupled to the high voltage circuit, the electrode configured to ionize air surrounding the electrode, and a controller circuit coupled to the power circuit and the high voltage circuit, the controller circuit including a controller configured to control a voltage output of the high voltage circuit to the electrode based on a feedback received from the high voltage circuit.

An antenna module includes a mounting board with a flat plate shape, and a power supply circuit to supply a radio frequency signal. The power supply circuit is mounted on the mounting board, and a radiating electrode is arranged on the power supply circuit. A dielectric fills a region around the power supply circuit and the radiating electrode. A conductive layer covers at least part of the dielectric. In the dielectric, a lens part is formed at a position overlapping the radiating electrode in plan view of the mounting board. The dielectric includes a first region in which the lens part is formed and a second region other than the first region, and the conductive layer is formed in the second region.

The invention discloses a network following-construction flexible control converter and a self-adaptive ratio coefficient selection method thereof, a DNT-GCC comprises a control structure and a converter power circuit, and the control structure comprises a GFL control module, a GFM control module, a self-adaptive control module, a shared current loop and a stability analysis module; the control method comprises the following steps of: depicting a DNT-GCC stability domain which is a short-circuit ratio SCR coefficient and a GFM control coefficient, and correspondingly obtaining values of dynamic adjustment and GFL control coefficients corresponding to a stability domain boundary according to the strength of a power grid working condition so as to control a converter power circuit.

A redundant power supply system delivers the power required by an electro-mechanical braking system. This is achieved through at least two independent power supply circuits, each containing energy storage device modules, e.g. batteries, which are supplied from the vehicle's board network. Additionally, a partitioning of the energy storage device modules in each supply path is provided, such that in case of failure in one or two of the energy storage device modules there is still adequate power to supply the braking system as well as other safety critical components.

The utility model relates to the technical field of nuclear fusion, and discloses a power supply circuit for an electrostatic probe, which comprises a power supply module and a sampling module, the power supply module is connected with the electrostatic probe through the sampling module, the power supply module comprises a plurality of linear power supply branches which are input in parallel and output in series, each linear power supply branch comprises a linear voltage regulator and a voltage regulating unit, and the input end of each linear voltage regulator is connected with a corresponding external power supply; the output end of the linear voltage regulator is connected with the electrostatic probe through the voltage regulating unit, and the voltage regulating unit corresponding to the last stage of linear voltage regulator is connected between the output end of the current linear voltage regulator and the ground. And the voltage regulating unit corresponding to the previous-stage linear voltage regulator is connected between the output end of the current linear voltage regulator and the output end of the next-stage linear voltage regulator. The power supply voltage with small enough voltage ripple and high enough voltage value can be provided for the plasma acquisition device, and weak ion saturation current signals can be accurately detected.

A converter allows a portable power storage system to be charged from an external DC power source, such as a vehicle's DC power outlet. The converter contains a DC-to-DC power circuit within a housing. This circuit receives a lower DC voltage from the external source and boosts it to a higher, regulated output voltage. A first connector links to the external source while a second connector, such as an MC4 or Anderson Powerpole, mates with the power storage system's solar panel inlet. The converter's output voltage and current are regulated to emulate a solar panel array's power-voltage characteristics, enabling the power storage system's existing charging circuitry to function without modification. The device may be bidirectional, allowing power to flow back to the vehicle for tasks like jump-starting. The system enhances versatility of portable power storage units by enabling charging from diverse DC sources when solar power isn't available.

The utility model relates to the technical field of electronic circuits, in particular to a magnetic clamp control circuit and imaging detection aperture equipment, the magnetic clamp control circuit comprises a power supply circuit unit, a control circuit unit and a load circuit unit, the power supply circuit unit comprises a first switch, a switching power supply and a DC-DC voltage reduction module, the control circuit unit comprises an adjustable potentiometer and a knob switch, and the load circuit unit comprises a magnetic coil. According to the magnetic clamp control circuit of the utility model, through reasonable power supply conversion, voltage regulation and control design, the reliability and economical efficiency of imaging detection aperture equipment are effectively improved.

Support multi -way communication free switching intelligent LED drive power supply circuit, including;MCU, the MCU is connected with first communication circuit, second communication circuit and third communication circuit;Still include with first communication circuit's first relay, with second communication circuit connection's second relay and with third communication circuit connection's third relay, first relay, second relay and third relay one end common connection, and this common connection point is connected with EMI circuit, EMI circuit is used for according to communication mode connection corresponding communication dimming line;Still include with the MCU is connected and is used for controlling each relay conduction's relay closure normally open circuit, the present application can support multiple application scenarios without replacing power supply, it is convenient for factory production and user uses, and multiple communication modes can be freely switched, and the practicality is stronger.

The present invention provides an equipment control device capable of properly protecting a system that controls equipment via a coaxial cable. [Solution] The device control device 100 comprises a power supply circuit, a communication circuit, a filter, a high-side switch, and a control unit 110. The control unit 110 includes a power supply voltage detection unit 111 that detects the power supply voltage supplied from the power supply circuit, and a current data acquisition unit 112 that acquires current data of communication signals transmitted and received from the communication circuit. The control unit 110 also includes a duty cycle acquisition unit 113 that acquires the duty cycle of the current data, and a current value determination unit 114 that determines whether the current value of the current data is equal to or greater than a predetermined current threshold. Furthermore, the control unit 110 includes a duty cycle adjustment unit 115 that reduces the ON ratio of the duty cycle when it is determined that the current value is equal to or greater than the current threshold.

This invention discloses an integrated wiring and commissioning method for a precision-processed low-voltage distribution cabinet and a field control box in a steel plant. The method includes: in the wiring stage, standardized and modular wiring between the GGD type low-voltage distribution cabinet and the matching field control box is performed based on a modular partitioned wiring method. The modular partitioned wiring method includes: based on the bottom-in / bottom-out wiring specifications of the low-voltage cabinet, modular partitioning of terminals according to power circuits, control circuits, and signal circuits; selection of cable specifications and error-proof wiring for power circuits, control circuits, and signal circuits; and independent wiring and anti-corrosion treatment of the neutral / ground busbars within the distribution cabinet. In the commissioning stage, based on a step-by-step commissioning method, the following steps are performed sequentially: single-cabinet component setting of the distribution cabinet, single-point local control commissioning of the control box, and linkage switching commissioning between DCS remote control and local control. The accuracy of fault signal feedback is verified simultaneously to ensure the operational stability and linkage adaptability of the entire system.

A power supply circuit and a power supply device, and the power supply circuit includes a bridge switching circuit, a transformer, a resonant circuit, a rectifier circuit. The bridge switching circuit, the transformer, the resonant circuit, and the rectifier circuit are sequentially connected in series. The resonant circuit includes an induction coil connected in series between the transformer and the rectifier circuit. In the case that the inductive coil is connected in series in the circuit, the inductive coil can participate in conductive charging as an inductor in the resonant circuit. Further, the inductive coil can also receive the inductive voltage wirelessly transmitted by the external circuit through electromagnetic induction, and the inductive voltage can be transmitted to the load through the rectifier circuit to achieve inductive charging.