1866 results about "Converter circuit" patented technology

The invention discloses a high-voltage circuit for an electric flame stove. The high-voltage circuit comprises a PFC circuit, a high-frequency conversion circuit, a boosting transformer, an energy coupling circuit and a voltage doubling circuit which are electrically connected in sequence. According to the EMI filter circuit, common-mode interference and differential-mode interference are filtered out, and pure alternating current input is provided for a back-end PFC circuit; two chips are adopted in the PFC circuit, so that the PFC circuit 300 finally realizes the consistency of the current waveform and the voltage phase; in the other embodiment of the invention, double chips are adopted, so that'fault linkage protection 'is realized; stable discharging of multiple groups of positive and negative electrodes is achieved through multiple groups of single energy coupling capacitors and independent voltage doubling rectifier bridges which are connected in parallel.

The invention relates to the technical field of motor control, and discloses a permanent magnet synchronous motor control system and method for an electric drive hydraulic source, and the system comprises a data collection module which is used for collecting the state parameters of the electric drive hydraulic source and the operation data of a permanent magnet synchronous motor in real time through multiple sensors; the sensor redundancy and fault-tolerant module is used for performing parallel sampling through hardware dual-redundancy configuration and dual sensors; the self-adaptive fuzzy logic control module is used for dynamically adjusting a rotating speed instruction and a torque instruction of the permanent magnet synchronous motor based on the collected state parameters; a data driving optimization module; and a digital twinning prediction maintenance module. A self-adaptive fuzzy logic control module is used for dynamically generating a motor rotating speed and torque instruction based on parameters such as real-time pressure, flow deviation and change rate, a fuzzy logic algorithm is used for processing a nonlinear time-varying load and quick response, a self-adaptive fuzzy logic control rule weight and a power conversion circuit parameter are optimized through a reinforcement learning algorithm, and the control precision is improved. And dynamic self-optimization of permanent magnet synchronous motor control is realized.

A linear voltage regulator includes a converter circuit that provides a serial bitstream having a pulse density that is indicative of a difference between a regulated voltage of the linear voltage regulator and a reference voltage. The linear voltage regulator also includes a digital to analog converter circuit that includes an input to receive the serial bitstream. The digital to analog converter circuit includes an averager circuit that produces an output signal to control a voltage of a control terminal of a power transistor of the linear voltage regulator for regulating the regulated voltage based on the pulse density of the serial bitstream.

In accordance with some embodiments of the present disclosure, a multi-level power converter circuit includes a flying capacitor, a balancing capacitor to control a voltage across the flying capacitor, a plurality of converter switches, a control switch coupled between the flying capacitor and the balancing capacitor, and control circuitry to open and close the control switch based on states of at least two converter switches of the plurality of converter switches. In some embodiments, the multi-level power converter is a three-level buck converter, and the balancing capacitor maintains a voltage across the flying capacitor to be within a threshold range of half the input voltage of the buck converter. In some embodiments, a method for operating the multi-level power converter includes using control circuitry to operate the plurality of converter switches and the control switch to selectively couple the balancing capacitor to either side of the flying capacitor.

The invention relates to an electromagnetic interference suppression method and device based on high-frequency GaN switching characteristics. The method comprises: in a power conversion circuit constructed based on a GaN switching device, edge analysis processing is performed on a driving signal of the GaN switching device to obtain edge feature data, and the edge feature data comprises a rising edge change rate and a falling edge change rate in a plurality of continuous switching periods; determining an equivalent network model constructed based on parasitic parameters in the power conversion circuit, and performing frequency domain response calculation on the equivalent network model according to the edge feature data, interference frequency band distribution information caused by the edge change is obtained, analysis processing based on spectrum energy adjustment is carried out on a driving signal of the GaN switching device according to the interference frequency band distribution information, and an adjustment control instruction used for restraining key frequency band interference is obtained. By adopting the method, an effective suppression strategy oriented to a specific interference frequency band can be realized.

A pulse width modulation control circuit for controlling a power converter circuit includes: a main loop control circuit; and a light-load loop control circuit. The light-load loop control circuit includes a current synthesis circuit configured to generate a synthesized current signal according to an input voltage and a target value of an output voltage and an inductance value of an inductor in a power stage circuit of the power converter circuit. The light-load loop control circuit generates a pulse modulation signal in light-load mode according to the synthesized current signal, to control a duty ratio of the power stage circuit. In the light-load mode, the main loop control circuit enters a power-saving state to reduce the power consumption of the pulse width modulation control circuit. The power-saving state includes: reducing the power consumption of the current sense circuit or stopping the operation of the current sense circuit.

A direct-current conversion circuit, which is used for providing direct-current conversion between a first direct-current voltage and a second direct-current voltage is described. The direct-current conversion circuit comprises: a transformer, which comprises a primary-side winding and a secondary-side winding, wherein the primary-side winding comprises a center tap, and a first primary-side winding and a second primary-side winding, which are respectively connected to the center tap; a primary-side circuit, wherein a first side of the primary-side circuit is connected to the primary-side winding, a second side of the primary-side circuit comprises a first end, a second end, and a third end, and a first direct-current voltage is provided between the first end and the second end of the primary-side circuit; and a secondary-side circuit, wherein a first side of the secondary-side circuit is connected to the secondary side winding.

The embodiment of the invention provides a power transmission system and a power generation system. The power transmission system comprises: a power conversion circuit for performing power conversion on an input electric signal; the filter circuit comprises a first filter circuit and a second filter circuit, and the first filter circuit is coupled between the input end of the power transmission system and the input end of the power conversion circuit; the second filter circuit is coupled between the output end of the power conversion circuit and the output end of the power transmission system; one end of the bridging capacitor bank is coupled with the input end of the power transmission system, and the other end of the bridging capacitor bank is coupled with the output end of the power transmission system, so that a loop is formed, and interference signals in the electric signals output by the output end of the power conversion circuit can flow back to the input end of the power conversion circuit. According to the embodiment of the invention, the interference signal can flow back, the common-mode interference current at the input end and / or the output end is reduced, a safety Y capacitor does not need to be adopted, the size of the filter inductor can be reduced, and the cost is reduced.

The invention is suitable for the technical field of resonant converters, and provides a starting control circuit and a resonant converter. The starting control circuit comprises a feedback module, a comparison selection module and a logical operation module, the comparison selection module is electrically connected with the feedback module and the logical operation module, the feedback module is used for being electrically connected with the output end of a resonant conversion circuit in the resonant converter, and the logical operation module is used for being electrically connected with a driving circuit in the resonant converter. According to the starting control circuit provided by the embodiment of the invention, the resonant capacitor voltage constraint threshold value which is gradually enlarged along with the starting process can be constructed, smooth establishment of resonant capacitor direct current bias is realized, the fluctuation amplitude of the resonant capacitor voltage is limited, the problem that the total bus voltage is applied to the resonant inductor in a traditional scheme is avoided, and the starting control circuit is suitable for a high-voltage power supply. Finally, the resonance current peak value in the starting stage is effectively suppressed, and the impact of current stress on core devices such as a switching tube and a resonance inductor is reduced.

The invention provides a control method of a single-stage AC / DC conversion circuit, a controller and a power supply module. The single-stage AC-DC conversion circuit comprises a primary side bridge arm switching circuit, an isolation circuit and a secondary side bridge arm switching circuit. The method comprises the following steps: acquiring an alternating current side voltage, and determining a maximum phase voltage and a minimum phase voltage based on the alternating current side voltage; and in response to a shutdown instruction, controlling the primary side bridge arm circuit corresponding to the maximum phase voltage and the primary side bridge arm circuit corresponding to the minimum phase voltage to act, so that an electrical loop is formed between the midpoints of the two bridge arms and the primary side of the isolation circuit, and the direction of the inductive current and the direction of the inductive voltage on the primary side of the isolation circuit in the electrical loop are opposite. The invention aims to realize safe shutdown of the primary side bridge arm switching circuit in the single-stage AC / DC conversion circuit and improve the safety and stability of the shutdown execution process of the single-stage AC / DC conversion circuit.

Controlling a power converter circuit for a direct current (DC) power source is disclosed. The power converter may be operative to convert input power received from the DC power source to an output power and to perform maximum power point tracking of the power source. The power converter is adapted to provide the output power to a load that also performs maximum power point tracking.

The invention provides a correlated double-sampling program-controlled gain amplifier for a high-energy particle detection pixel sensor and an implementation method, and solves the technical problem that a large dynamic range and high readout precision cannot be considered at the same time during existing high-energy particle detection. The circuit comprises a correlated double-sampling circuit, a signal polarity conversion circuit, an amplification feedback circuit and a configuration automatic judgment circuit. The correlated double sampling circuit is used for performing double sampling on the output voltage of the pixel signal to obtain twice sampling voltage; the configuration automatic judgment circuit is used for selecting configurations for switching according to the voltage difference between the two sampling voltages to obtain an output signal; and the amplification feedback circuit is used for performing fixed gain voltage amplification on the output signal to obtain an amplified voltage signal. The circuit can be widely applied to the technical field of integrated circuits.

Described herein is a method of operating a power electronic converter device for an electrical power conversion system. The power electronic converter device includes a converter circuit including an input side, an output side, a first converter, and at least one second converter. The second converter includes at least one floating cell with a DC intermediate circuit and semiconductor devices. The method includes: switching the semiconductor devices of the floating cell at switching instants determined with optimized pulse patterns or carrier-based pulse width modulation; determining a fundamental voltage component for the floating cell; and generating the fundamental voltage component in the actual voltage of the floating cell by modifying the switching instants, such that a voltage VC AF of the DC intermediate circuit is lying in a given reference voltage range for balancing the DC intermediate circuit of the floating cell.

The utility model discloses a single-stage and double-stage switching type circuit, which belongs to the technical field of electric energy conversion and comprises a first inductor, a second inductor, a third inductor, a three-phase rectifier bridge, a first control tube, a second control tube, a third control tube and a direct current regulation module, three input ends of the three-phase current bridge are respectively connected in series with the first inductor, the second inductor and the third inductor, and middle points of three bridge arms of the three-phase rectifier bridge are respectively connected with an input end of the direct current adjusting module after passing through the first control tube, the second control tube and the third control tube. The output end of the direct current adjusting module is connected with the load; according to the invention, the single-stage and double-stage rectification conversion circuit can be switched according to needs.

The present application provides a power converter, comprising: a power conversion circuit and a control circuit. The power conversion circuit comprises an inverter circuit, a direct-current bus capacitor, and a detection circuit, wherein the direct-current bus capacitor is connected in parallel to the inverter circuit. The direct-current bus capacitor comprises a positive bus capacitor and a negative bus capacitor which are connected in series. The inverter circuit comprises bridge arms. The detection circuit is used for measuring the voltage on the two sides of the positive bus capacitor, the voltage on the two sides of the negative bus capacitor, and an output current of each bridge arm. The control circuit is used for, in response to a preset condition, controlling the bridge arm to be switched from outputting two types of levels to outputting three types of levels in one switching period. The preset condition is a condition based on the voltage of the positive bus capacitor, the voltage of the negative bus capacitor, and the output current of the bridge arm. According to the present application, the three-level and two-level hybrid modulation is used, so that the power converter can achieve balance on the output quality of electric energy and power consumption, improving the performance of the power converter.

The invention discloses a charge control method and circuit applied to a resonant conversion circuit, and electronic equipment. The charge control method comprises the following steps: acquiring an input voltage and an output voltage of the resonant conversion circuit; an adjustment output signal is obtained by using an error signal between the output voltage and the benchmark reference voltage; acquiring the amplitude change rate of the input voltage; obtaining a slope compensation slope by using the amplitude change rate; performing slope compensation on the adjustment output signal by adopting the slope compensation slope to obtain a feedback adjustment signal; generating a driving control signal by using the feedback regulation signal; and the driving control signal is sent to the resonant conversion circuit to adjust the on-off state of the resonant conversion circuit so as to adjust the output voltage. Through the above mode, the charge control method provided by the invention effectively improves the dynamic performance, avoids subharmonic oscillation under extreme conditions, dynamically adjusts the slope compensation slope in real time, and further ensures the stability in a relatively wide input voltage range.

The invention discloses a preparation method and device of a quantum state, equipment and a storage medium, and relates to the field of quantum. The method comprises the following steps: determining an initial quantum state of n quantum bits, wherein n is a positive integer; based on the n quantum bits and the Hamming weight k, constructing an initial first quantum state unitary transformation circuit through recursive decomposition; performing circuit depth compression on the weight allocation transformation operator based on idle quantum bits in the initial first quantum state unitary transformation circuit to obtain a first quantum state unitary transformation circuit; and acting the first quantum state unitary transformation circuit on the initial quantum state to obtain a first quantum state circuit. Idle quantum bits in an initial first quantum state unitary transformation circuit are used as auxiliary quantum bits, the operation parallelism of a quantum state preparation operator is improved through the auxiliary quantum bits, and circuit depth compression is performed on a weight distribution transformation circuit, so that the circuit depth of the first quantum state unitary transformation circuit is compressed; on this basis, the depth of the first quantum state circuit is compressed.

The invention provides an electric power energy system, a line impedance measurement method and a related device, and relates to the technical field of electric power systems. The controller obtains an impedance measurement instruction based on a power scheduling instruction of the electric power energy system and issues the impedance measurement instruction to a target power conversion circuit which needs to operate in a network following control mode, and the target power conversion circuit obtains first operation information of a grid connection point before a target controller responds to the impedance measurement instruction. And obtaining second operation information of the grid-connected point after the target controller responds to the impedance measurement instruction, wherein the first operation information and the second operation information are used for determining the line impedance of the grid-connected point of the target power conversion circuit. In the embodiment, the line impedance of the grid-connected point of the target power conversion circuit is determined by analyzing the change of the operation information of the grid-connected point before and after the target power conversion circuit responds to the impedance measurement instruction, and the purpose of accurately measuring the line impedance at the PCC of the grid-connected point is achieved.

A converter circuit may require sensing an average current as feedback for regulating the average current supplied to a load. Sensing the average current may be inaccurate due to the non-ideal behavior of devices in the converter circuit. The disclosed circuits and methods help to improve the accuracy of the sensed average current by ignoring portions of a PWM cycle. Some of the ignored portions are based on a peak threshold for a rising current of a PWM cycle and a valley threshold for a falling current of a PWM cycle. The peak threshold and the valley threshold may be adjusted to control the average current and the switching frequency of the converter circuit.

The invention relates to a charger, a charger control method and a vehicle. The charger comprises a magnetic integrated transformer, an AC-side single-stage conversion circuit, a high-voltage-side conversion circuit and a low-voltage-side conversion circuit. The first end of the alternating-current side single-stage conversion circuit is connected with an alternating-current side, and the second end is connected with a primary winding of the magnetic integrated transformer; the first end of the high-voltage side conversion circuit is connected with a high-voltage secondary winding of the magnetic integrated transformer, and the second end is connected with a power battery; the first end of the low-voltage side conversion circuit is connected with the low-voltage secondary winding of the magnetic integrated transformer, and the second end is connected with a low-voltage system. A power factor correction function can be realized through the alternating current side single-stage conversion circuit, a power factor correction circuit and a bus electrolytic capacitor can be omitted at the same time, and the service life of the charger is prolonged. In addition, the high-voltage side conversion circuit and the low-voltage side conversion circuit share one magnetic integrated transformer, so that the size of the charger is reduced, the consumption of power switch devices is reduced, and the cost and the highest power density are reduced to the maximum extent.

An image sensor assembly includes a pixel circuit and a converter circuit. The pixel circuit includes a first amplification transistor and a first selection transistor, wherein the first amplification transistor and the first selection transistor are electrically connected in series. The first amplification transistor and the first selection transistor output first pixel signals at a first pixel output, when the first selection transistor is turned on. The converter circuit receives the first pixel signals from the first selection transistor. The converter circuit further receives second pixel signals from the first selection transistor or from a second selection transistor. The converter circuit converts voltage differences between the first pixel signals and the second pixel signals into digital coefficients (DR, DQ, d0, . . . , dn).

The invention discloses a battery pack activity heat recovery control method for a low-temperature environment, and particularly relates to the technical field of battery activity heat recovery control, and the method comprises the steps: deploying a sensor for a target battery pack, carrying out the monomer division of the battery pack, and collecting the parameter data of each battery pack monomer in real time; preprocessing the collected battery pack monomer parameter data, and setting a threshold value; generating a heat recovery starting instruction; generating a low-frequency alternating-current excitation signal; controlling a power conversion circuit according to the low-frequency alternating-current excitation signal, and outputting alternating current for battery pack thermal recovery; and generating a thermal recovery stop instruction according to the limitation condition of the battery pack monomer. According to the method, the problems of low heat efficiency, poor safety, insufficient control precision, weak adaptability and the like in the battery heat recovery process are solved by collecting the parameter data of the single battery pack, setting the threshold value, generating the heat recovery starting instruction, calculating the joule heat generated by the current and generating the heat recovery stopping instruction according to the limiting condition.

The invention provides a high-voltage direct-hanging energy storage system and method with a battery state self-balancing capability, and the method comprises the steps: enabling a battery module to be connected to a DC bus of a multi-level AC-DC power conversion circuit through a battery state self-balancing energy storage module, and enabling the multi-level AC-DC power conversion circuit to convert the electrochemical energy in the battery module into electric energy; the main control unit generates modulation information of the battery state self-balancing energy storage module through control by sampling voltage and current information of a power grid side and collecting battery state information uploaded by the battery state self-balancing energy storage module; the sub-module distributed control unit receives the modulation information generated by the main control unit, transmits the battery state information to the main control unit, and converts the received modulation information into a switching signal corresponding to the battery state self-balancing energy storage module. According to the invention, the number of switches of the system can be reduced, the state self-equalization of the batteries in the sub-modules is realized, the control difficulty of main control is reduced, and an energy storage system with a higher voltage level and a larger single-machine capacity is facilitated.

The present application provides a power converter, comprising: a power conversion circuit and a control circuit. The power conversion circuit comprises an inverter circuit, a DC bus capacitor and a detection circuit, and the DC bus capacitor is connected in parallel with the inverter circuit. The DC bus capacitor comprises a positive bus capacitor and a negative bus capacitor connected in series. The inverter circuit comprises a bridge arm. The detection circuit is used to detect the voltage on both sides of the positive bus capacitor, the voltage on both sides of the negative bus capacitor and the output current of the bridge arm. The control circuit is used to control the bridge arm to switch from outputting two levels to outputting three levels within one switching cycle in response to preset conditions. The preset conditions are conditions based on the voltage of the positive bus capacitor, the voltage of the negative bus capacitor and the output current of the bridge arm. The present application uses a hybrid modulation of three levels and two levels, so that the power converter can achieve a balance between the quality of power output and power consumption, thereby improving the performance of the power converter.

In certain embodiments, a memory module includes a printed circuit board (PCB) having an interface that couples it to a host system for provision of power, data, address and control signals. First, second, and third buck converters receive a pre-regulated input voltage and produce first, second and third regulated voltages. A converter circuit reduces the pre-regulated input voltage to provide a fourth regulated voltage. Synchronous dynamic random access memory (SDRAM) devices are coupled to one or more regulated voltages of the first, second, third and fourth regulated voltages, and a voltage monitor circuit monitors an input voltage and produces a signal in response to the input voltage having a voltage amplitude that is greater than a threshold voltage.

The present application provides an on-board charger and a control method thereof. Since the transformer side of the AC / AC conversion circuit is connected to the AC side of the AC / DC conversion circuit via a transformer, the on-board charger has a single-stage structure. Furthermore, since the instantaneous sampling value of the grid-side current is equal to its instantaneous reference value when stable, and the instantaneous reference value of the grid-side current is determined by the phase of the instantaneous sampling value of the grid-side voltage and the reference peak value of the grid-side current, the on-board charger has a PFC function. Furthermore, since the battery-side charging power can be indirectly controlled by controlling the grid-side current, the on-board charger has a battery-side voltage and current control function. Furthermore, since phase shift control is performed on the two conversion circuits, and the phase shift control enables soft switching of the power devices in the two conversion circuits, and the single-stage structure reduces the current flowing through the devices, efficiency is improved. Therefore, the single-stage structure efficiently implements the PFC and battery-side voltage and current control functions of the two-stage isolated on-board charger.

The invention discloses a surge current suppression method and a surge current suppression system for an electricity utilization and acquisition terminal power supply, and the method comprises the steps: designing a surge current suppression circuit which comprises a current input circuit, an EMI circuit, a rectification circuit, a low-power-consumption surge current suppression circuit, an energy storage capacitor and a flyback power conversion circuit; external alternating current is obtained through the current input circuit, and then the external alternating current is converted into first high-voltage direct current through the EMI circuit and the rectifying circuit; the first high-voltage direct current is limited to charge the energy storage capacitor through the low-power-consumption surge current suppression circuit; and the second high-voltage direct current in the energy storage capacitor is transmitted to the flyback power conversion circuit for voltage conversion, and the low-voltage direct current is acquired and transmitted to an acquisition terminal power supply. The low-power-consumption surge current suppression circuit can automatically switch working states, efficiently suppress surge current and reduce circuit power consumption, is high in portability, can adapt to different power supply products by adjusting elements, and meets various surge suppression requirements.

The single-phase bidirectional single-stage isolation matrix converter comprises a pre-stage circuit and a post-stage circuit, and the pre-stage circuit comprises an LC filter on the power grid side, a pre-stage single-phase matrix conversion circuit and an LLC resonance circuit with a high-frequency transformer; the post-stage circuit comprises a post-stage conversion circuit and an output filter capacitor; the front-stage single-phase matrix conversion circuit comprises four bidirectional switch assemblies of a full-bridge structure. Each bidirectional switch assembly comprises two unidirectional controllable MOS tubes which are reversely connected in series, one end of each bidirectional switch assembly is connected to an L line or an N line of a power grid, and the other end of each bidirectional switch assembly is connected to the LLC resonance circuit. The rear-stage conversion circuit comprises a bidirectional MOS (Metal Oxide Semiconductor) tube bridge circuit and three high-frequency transformer secondary windings which are in triangular connection or star connection; and two end points of each secondary winding are respectively connected to the upper MOS tube and the lower MOS tube of the corresponding bridge arm and then are connected to output positive and negative ends. The converter has the advantages of high power density, low current harmonic, high power factor and the like, and is small in size, strong in anti-interference capability, wide in buck-boost range, and safe and reliable in commutation.