44 results about "Converter design" patented technology

A multiport converter designed to supply direct current loads comprising one or more energy sources, a battery, a multiport DC-DC converter connected to the energy sources and to a load, an IoT device for communication and control of the system. The multiport DC-DC converter further comprises an energy management system for selectively controlling the charging or discharging of the battery and the amount of energy directed to the load based on predictions of energy generation from the energy sources, based on a load demand and based on optimized scenarios. The multiport converter is used in green hydrogen generation plants powered by renewable energy sources, such as wind and photovoltaic energy; and a system capable of self-managing and ensuring better use of energy from the sources and better efficiency of green hydrogen generation.

The invention discloses a multi-parameter collaborative optimization design method for a modular multilevel converter, and belongs to the technical field of modular multilevel converter design. In order to solve the problem of reasonable design of main parameters of the modular multilevel converter, a mathematical model of the modular multilevel converter is constructed; designing a capacitor voltage fluctuation model, a sub-module capacitor capacitance value model and a fluctuation quantity model, and analyzing the relationship between the capacitor voltage fluctuation and the operation condition and the relationship between the sub-module capacitor capacitance value and the operation condition; determining an upper limit value of the bridge arm inductance based on consideration of a system power operation range, determining a design initial value of the bridge arm inductance based on consideration of ring current suppression, determining a lower limit value of the bridge arm inductance based on consideration of resonance avoidance and fault current rise rate limitation, and obtaining a design range of the bridge arm inductance; adjusting the bridge arm inductance to obtain a design value of the designed bridge arm inductance; and according to the capacitance value of the sub-module capacitor and the design value of the designed bridge arm inductor, analyzing the peak voltage and the peak current of the power device IGBT to determine the parameter selection of the power device.

The present invention relates to the technical fields of alternating current power grid power flow control and power electronics. Disclosed is a method for designing main circuit parameters for a transformer-free multi-terminal flexible interconnection apparatus, comprising: carrying out MTSNOP main circuit parameter design by means of a series converter design and a parallel converter design; the series converter design comprises a design for a voltage and quantity, and a capacitance value, of a sub-module of a PFCM and a PBCM, and a bridge arm inductance design and an AC-side equivalent filter inductance design of the PFCM and the PBCM; the parallel converter design comprises a parallel CMI capacity design and sub-module voltage and quantity design, a parallel CMI sub-module capacitance value design, and a parallel CMI connection inductance design. The method of the present invention adopts a modular design with easy port expandability, allowing for adaptability to power systems of different scales. The reasonable parameter design effectively improves system transmission capacity, mitigates heavily loaded line problems, optimizes transmission power flow, effectively suppresses voltage fluctuations, and improves voltage quality.

Electronic device comprising a rechargeable battery and a voltage- or current-controlled power converter (150) for charging the battery, wherein the power converter (150) is designed to provide electrical power at an output voltage V out to charge the battery at an output of the power converter (150) from electrical power at an input voltage V into be derived at an input of the power converter (150), wherein the power converter (150) comprises an inductor (L), a first sub-converter (110) with several first switches (S1, S2, S3, S4) and a first capacitor cell (C1), and a second sub-converter (120) with several second switches (S5, S6, S7, S8) and a second capacitor cell (C2); wherein the power converter (150) comprises only a single inductor for the first sub-converter and for the second sub-converter, and a controller; wherein the controller is configured to control the several first and the several second switches such that the first and the second sub-converter are operated in a nested manner, and wherein a commutation cycle of the power converter comprises: - a first phase, during which the first capacitor cell and the inductor are connected in series between the input and the output of the power converter (150), and during which the second capacitor cell and the inductor are connected in series in parallel with the output of the power converter (150); - a second phase, during which the first capacitor cell and the inductor are connected in series in parallel with the output of the power converter (150), and during which the second capacitor cell and the inductor are connected in series between the input and the output of the power converter (150); and - a third phase, during which the first and second capacitor cells are decoupled from the output of the power converter (150), during which the charge of the first and second capacitor cells remains unchanged, and during which the inductor is arranged between the input and the output of the power converter (150) or is connected in parallel to the output of the power converter (150), wherein the controller is designed to control the multiple first and second switches in such a way that the power converter is operated in the third phase following the first phase and / or following the second phase within one commutation cycle, and wherein The controller is designed to do the following: - Determining an output current I out at the end of the first phase and / or at the end of the second phase; - Control the several first and second switches during the third phase such that the inductor is then arranged between the input and the output of the power converter (150) when the output current I out at the end of the first phase and / or at the end of the second phase less than a reference current I ref is; and - Control the several first and second switches during the third phase such that the inductor is then connected in parallel to the output of the power converter (150) when the output current I out at the end of the first phase and / or at the end of the second phase greater than the reference current I ref is.

The utility model relates to a bidirectional buck-boost DC-DC converter. The converter comprises an input terminal; an output terminal; the two-stage conversion circuit is arranged between the input terminal and the output terminal, the first-stage conversion circuit is used for converting an input voltage received at the input terminal into an intermediate voltage, and the second-stage conversion circuit is used for converting the intermediate voltage into an output voltage at the output terminal; and a tank circuit disposed between the two stages of conversion circuits, the tank circuit including a super capacitor and a control switch, the control switch turning on the super capacitor in response to a voltage fluctuation at an output terminal of the bidirectional buck-boost DC-DC converter to stabilize an output voltage at the output terminal. According to the design of the DC-DC converter, the circuit structure is simplified, the cost is reduced, and the overall reliability of the conversion circuit is improved.

DEPCT67 The power converter kit includes: A converter designed to transform AC power fed from a power source. AC power is converted into DC power using a pair of primarily conductive wires; An inverter, which is designed to convert the DC power sent from the converter to... A pair of wires with a second conductor is used to provide AC power; and A capacitor which is connected between the conductive wires of a pair of conductive wires or between... A wire with a conductive second conductor. Where the carrier wave frequency for driving the inverting motor is set to fc, the allowed frequency is... The resonance of an LC filter circuit consisting of one or more reactors and a... The capacitor is set to fLC, and the maximum value of the inverter's output frequency is set to MAX(f0)MAX(f0). It will then be according to MAX(f0)6 times.

A precharging arrangement (10) for a multiphase power converter (20) is disclosed in this document. The multiphase power converter (20), optionally an H-bridge power converter, is designed to be supplied by a multiphase AC power supply (40) via an input filter (30). The multiphase power converter (20) is designed to be connected to and disconnected from the multiphase AC power supply (40) by a first power switch (35). The precharging arrangement (10) comprises an AC power supply (12) which is connected via a transformer (14) having a primary side (14A) and a secondary side (14B) between a first common point (39) of the input filter (30) and a second common point (29) of the multi-phase power converter (20) for precharging DC link capacitors (25) of the multi-phase power converter (20), and a second power switch (15) for connecting and disconnecting the precharging arrangement (10).

There is provided a power electronic device for driving a switched reluctance motor, comprising: a plurality of phase legs, each phase leg comprising a phase winding, in which the plurality of phase legs are connected in series to form a ring; and a main inverter having a plurality of inverter legs, in which the number of the plurality of legs is equal to the number of the plurality of phase legs, in which each leg of the plurality of legs is connected to two of the plurality of phase legs at a switch node and each of the plurality of phase legs is connected to two of the plurality of legs, and in which each of the plurality of phase legs is connected to two of the plurality of legs, and in which the number of the plurality of legs is equal to the number of the plurality of phase legs. At least one of the phase legs includes at least one voltage source connected in series with a respective phase winding.

This invention relates to the field of power converter technology and discloses an interleaved power converter device based on gallium nitride devices. The device includes a power converter body with multiple sets of connectors on its surface. An auxiliary device is also provided on the surface of the power converter body, including side plates located on both sides of the power converter body. In this invention, by providing the auxiliary device, in the non-heat dissipation state, a reset spring drives a shielding ring to reset, sealing the through-hole and preventing dust intrusion. The miniature hollow tube and filter screen form a micro-ventilation channel, allowing air to circulate slowly inside the device, reducing localized heat accumulation in a sealed environment and mitigating the problems of large diameter, dust-prone, and small diameter, poor heat dissipation associated with traditional fixed heat dissipation holes. During heat dissipation, a drive component moves a control component, squeezing multiple sets of moving plates. These moving plates move the miniature hollow tube and shielding ring, causing the through-hole to fold, enabling rapid exhaust operation.

The application relates to the field of digital-to-analog converter design, in particular to a VCM type lower plate sampling CDAC circuit and a switching circuit thereof, a first capacitor array, a second capacitor array, a first switch group, a second switch group and a comparator; wherein the first switch group and the second switch group adopt time sequence controlled multi-selection switches, have natural advantages of reducing the risk of short circuit and glitch of a reference end; unified switch matrix and complementary control are easier to realize injection offset and equivalent capacitor balance, reduce voltage disturbance return to the VCM / VREF during switching of the lower plate, and improve the linearity of the circuit.

A converter system (1) for a vehicle (3) is specified, comprising - a large number of first converters (8), wherein - at least some of the first converters (8) are connected in parallel to each other, - the first converters (8) are designed to be connected at a first side (6) to a traction battery (5) of the vehicle (3), - the first converters (8) are designed to be connected to an electronic on-board network (4) of the vehicle (3) on a second side (7) opposite the first side (6), and - the first converters (8) are designed to provide a quiescent current in a standby mode of the vehicle (3) to the electronic on-board network (4) of the vehicle (3). Furthermore, a system (2), a vehicle (3) and a method for controlling the converter system (1) are specified.

The application relates to a modular energy storage converter and belongs to the technical field of converter design. The application divides the electrical elements into electrical elements with large heat generation and electrical elements with small heat generation according to the different heat generation of the electrical elements of the energy storage converter, and the electrical elements are arranged in different zones, the electrical elements with large heat generation are arranged on the other side of the circuit board and are cooled by the cooling fan, and the electrical elements with small heat generation are arranged on one side of the circuit board and are naturally cooled without the auxiliary cooling device, so that the number of the cooling fans is saved, the cost is reduced, the volume of the energy storage converter is reduced, and the power density is improved.

The invention belongs to the technical field of integrated photoelectronics, and particularly relates to a design method of a photon mode converter with high manufacturing tolerance and wide working bandwidth. The method comprises the following steps: S1, quantitatively characterizing a sensitive area and a tolerance boundary; s2, applying a security boundary design criterion; and S3, collaborative optimization under constraint. The method aims at solving the problems that in the prior art, a photon mode converter is sensitive to manufacturing process deviation and narrow in working bandwidth. According to the method for designing the photon mode converter with the high manufacturing tolerance and the wide working bandwidth, the manufacturing tolerance and the working bandwidth serve as preposed constraint conditions at the beginning of design, and therefore predictable high robustness is achieved.

A multiphase power inverter containing several X-type multistage power converters designed to transfer electrical power between a high-voltage direct current (HVDC) supply and an electrical machine. Each of the multiple X-type multistage power converters is configured as a solid-state integrated circuit (SEC) containing folded branches that include multiple semiconductor switches and clamping diodes. The multiple semiconductor switches, a positive DC power bus, a negative DC power bus, a first AC bus, a second AC bus, a third AC bus, a fourth AC bus, and the clamping diodes are arranged in multiple stages.Such that both the positive DC power bus and the negative DC power bus are parallel to the neutral bus, which generates mutual inductance rejection that minimizes parasitic inductance by coupling the positive mutual inductance and the negative mutual inductance for commutation loop currents in each of the X-type multi-stage converters.

A heat transfer system includes a first electrocaloric module comprising a first electrocaloric material, a first high-side electrode, and a first low-side electrode, arranged to impart an electric field to the electrocaloric material; a second electrocaloric module comprising a second electrocaloric material, a second high-side electrode, and a second low-side electrode, arranged to impart an electric field to the electrocaloric material; a power convertor including a power source configured to supply power to a high side bus and a low side bus; a controller configured to operate the power convertor through a plurality of stages.

The utility model belongs to the field of converter design, and relates to a DCDC output voltage dynamic regulation circuit based on MCU and DAC regulation, which comprises an MCU, a DCDC converter and a control circuit, a pin 14 of the MCU and a pin 8 of the DCDC converter are connected with the control circuit; a pin 14 of the MCU is a pin PA, and a pin 8 of the DCDC converter is a pin FB; the control circuit comprises a first resistor, a triode, a second resistor and a third resistor; the utility model provides a simple, economical and efficient solution which is suitable for cost-sensitive applications. A user can flexibly adjust the output voltage, the requirements of different application scenes are met, and the adaptability of the system is improved. The circuit design is simplified, and complex circuit design and software support are not needed. The implementation is easier, the development difficulty and time cost are reduced, and large-scale production and application are facilitated. The method is not limited by specific application, a universal solution is provided, and the market competitiveness of the product is enhanced.

The invention relates to a drive system (1, 1') for operating a traction motor (6) of an electric vehicle, comprising; - a vehicle battery (2), - an intermediate circuit capacitor (3) in an intermediate circuit connected to the vehicle battery (2) so that an intermediate circuit voltage (U dc ) essentially the battery voltage (U Bat ) corresponds to the vehicle battery (2); - a charging circuit (7) with a supply DC / DC converter (73) configured to convert a supply DC voltage (U) buffered in a supply capacitor (72) HV ) to convert into the intermediate circuit voltage, wherein the supply DC / DC converter (73) is designed for bidirectional operation; - a power driver (4) designed to operate the traction motor (6) with electrical energy from the intermediate circuit; - a control unit (10) designed to operate the supply DC / DC converter (73) in reverse in the event of an overvoltage in the intermediate circuit, so that electrical energy is discharged from the intermediate circuit into the supply capacitor (72) and thus the intermediate circuit voltage (U) dc ) is reduced.

The invention discloses a double-pulse test method, which relates to the technical field of power module test, and comprises the following steps: S1, building a double-pulse test platform; s2, setting parameters; s3, executing a double-pulse test; s4, exporting test parameters; and S5, parameter verification. According to the double-pulse test method, by optimizing the design of a test platform, electromagnetic interference is effectively reduced, the accuracy of waveform and parameter measurement is ensured, the width of the first pulse and the test inductance are quantitatively calculated through a formula, it is guaranteed that the test current accurately reaches a target value, and a foundation is laid for switch parameter extraction; moreover, a test voltage increasing criterion, waveform monitoring key points and a verification process after driving parameter adjustment are defined, consistency and reliability of test results are ensured, finally parameters such as switching loss, voltage spike and delay time are comprehensively extracted, actual characteristics of the power module are directly reflected, and the test accuracy is improved. And a key reference is provided for converter design such as drive circuit optimization and heat dissipation design.

The invention relates to an LLC half-bridge resonant converter parameter design method and related equipment. The method comprises the following steps: S1, respectively obtaining weight coefficients of resonant inductor current and resonant capacitor alternating-current voltage amplitudes of the converter and normalization results corresponding to the resonant inductor current and the resonant capacitor alternating-current voltage amplitudes, and constructing a preset single objective function according to the weight coefficients and the normalization results; wherein the sum of the weight coefficients of the amplitude of the resonant inductor current and the amplitude of the resonant capacitor AC voltage is 1; and S2, obtaining a performance index corresponding to the converter, and carrying out iterative calculation according to the performance index and the preset single objective function by taking the design parameter corresponding to the converter as a variable, so as to obtain a corresponding design parameter when the preset single objective function is the minimum value as a final design parameter of the converter. Converter parameter design difficulty can be reduced, and converter design efficiency can be improved.

The present invention discloses a digital calibration method and device for an R-2R digital-to-analog converter, wherein the method includes: connecting each unit conversion unit between detection circuits to obtain a detection output signal corresponding to each unit conversion unit; obtaining the actual resistance value in each unit conversion unit based on the detection output signal and forming a resistance value set; obtaining a target output voltage based on an ideal digital input signal and an ideal resistance value set, and obtaining the actual digital input signal corresponding to each unit conversion unit when the error between the target output voltage and the actual output voltage is minimized through a minimum mean square error algorithm; thereby obtaining the calibrated actual output voltage, with the minimum error compared to the ideal output voltage. The present invention greatly reduces the accuracy requirements for analog device matching, making it possible to design low-cost digital-to-analog converters using advanced processes, and using relatively inexpensive devices to achieve digital calibration of R-2R digital-to-analog converters.

According to the wind power generation unit system and the topological parameter optimization and control design method thereof, on one hand, rated parameters are determined, then the value ranges of direct current side capacitance, commutation inductance, filter capacitance and damping resistance and the voltage level of the direct current side are calculated and determined, and then machine side and network side current converter control systems are designed; finally, simulation software and a hardware platform are used for conducting simulation verification optimization. On the other hand, a wind power generation unit system topology composed of a wind turbine, a permanent magnet synchronous generator, a back-to-back full-power converter, a filter and a boosting transformer is constructed, and wind energy-mechanical energy-electric energy conversion, processing and grid connection are cooperatively achieved. By accurately calculating system parameters, optimizing converter design, reducing energy loss and cooperating with control system design, parameters of core devices of all parts can be reasonably configured, more excellent control performance is achieved, and therefore the conversion efficiency, the electric energy quality and the system stability of a power generation unit are improved.

The application discloses a double-pulse test method, and relates to the technical field of power module testing, and comprises the following steps: S1, a double-pulse test platform is built; S2, parameter setting; S3, double-pulse test is executed; S4, test parameters are derived; and S5, parameter verification. The double-pulse test method effectively reduces electromagnetic interference by optimizing the design of the test platform, ensures the accuracy of waveform and parameter measurement, quantitatively calculates the first pulse width and test inductance through a formula, guarantees that the test current accurately reaches a target value, lays a foundation for switch parameter extraction, and clearly defines test voltage increment criteria, waveform monitoring points and a verification process after driving parameter adjustment, thereby ensuring the consistency and reliability of test results. Finally, parameters such as switch loss, voltage peak and delay time are comprehensively extracted, which directly reflects the actual characteristics of the power module and provides key references for converter design, such as driving circuit optimization and heat dissipation design.

The application discloses a dynamic comparator with differential charge compensation function. The dynamic comparator mainly comprises an input stage with compensation function and a digital output stage. The application proposes a differential charge compensation mechanism for the influence of input pair tube grid capacitance, which is used for eliminating the influence of input pair tube grid capacitance on signal sampling process. The dynamic comparator changes the input end load capacitance corresponding to the signal sampling process and the differential charge compensation process by the compensation input transistors M1 and M2 and the two-phase non-overlapping clock and introduced signal sampling process and differential charge compensation process, so that the differential equivalent charge on the input grid capacitance in the comparator reset stage after signal sampling is completely offset, the purpose of differential charge compensation is achieved, and the error caused by the existence of the comparator grid capacitance is eliminated. The dynamic comparator is suitable for successive approximation type digital-to-analog converter design of top plate sampling mechanism.

The utility model provides a narrow long type high power density frequency changer design relates to frequency changer technical field, including panel, the inside of panel is provided with direct current reactor, the side of direct current reactor is provided with drive board, the inside of panel is provided with binding post, the inside of panel is provided with expansion card control panel, the utility model discloses a narrow long shape modularization design is adopted to panel, and power unit, direct current bus, reactor vertical arrangement is suitable for the side or back of cabinet installs, saves the space, and it is convenient to adapt to such as the narrow long installation space in industrial control cabinet.

The application discloses an active clamp resonant driving circuit and device, comprising a power supply module, an energy storage clamp module, a switch group module, an additional capacitor module and an output driving module. The device corresponds to the circuit. Through the energy storage clamp module and the switch group module, the application can realize wide-range duty cycle adjustment of quasi-square wave driving output at a frequency of tens of megahertz, adapt to the duty cycle requirements of different working conditions, support a certain width of frequency band work through the same set of circuit parameters, greatly improve the flexibility of super-high frequency power converter design, and reduce the circuit redesign cost under different frequency scenes. Through the energy storage clamp module, the coupling degree of the driving waveform and the line parasitic parameters is effectively reduced, the driving circuit still has good stability when working at high frequency, the anti-interference ability is enhanced, the adverse effects of parasitic parameters or external interference on the driving performance are avoided, and the reliability of the high-frequency work of the power electronic switching device is ensured.

The invention discloses a three-phase interleaved parallel bridgeless totem pole PFC power converter which comprises three pairs of high-frequency bridge arms, each pair of high-frequency bridge arms is formed by connecting two high-frequency switch tubes in series, and PWM carriers of the high-frequency switch tubes in the three pairs of high-frequency bridge arms are staggered by 120 degrees; the pair of low-frequency switching devices are switched on and off at the power grid frequency to realize synchronous rectification; three same input inductors; the two ends of each auxiliary inductor are connected to the midpoints of different high-frequency bridge arms respectively, the three auxiliary inductors are connected end to end, and zero-voltage soft switching of the high-frequency switching device is achieved through energy storage and release of the auxiliary inductors. Compared with a traditional three-phase interleaving bridgeless totem pole PFC circuit, the power converter can meet the high-power application requirement, a power device can achieve soft switching, the converter is allowed to operate under the high switching frequency, the parameter requirements of inductance and capacitance are reduced, the system size is reduced, and the power density of the system is improved.

The utility model provides a matrix converter and AC-DC converter, and the matrix converter comprises a plurality of bridge arms, each bridge arm comprises a first active switch device, a second active switch device, a third active switch device and a fourth active switch device which are connected in series, the first end of the first active switch device is used for being electrically connected with an external load, and the first end of the fourth active switch device is used for being electrically connected with the load; the first ends of the second active switch device and the third active switch device are connected with each other and are used for being electrically connected with an external alternating current power grid, the plurality of first active switch devices share one isolation power supply, the plurality of fourth active switch devices share one isolation power supply, and the second active switch device and the third active switch device of each bridge arm share one isolation power supply. For the N-phase matrix converter, N + 2 paths of power supplies are needed, and compared with 2N paths of power supplies needed in the related technology, the design cost of the converter can be effectively saved, the design complexity is reduced, the size of the converter is reduced, and the integrated design of the system is facilitated.

Polarization is a parameter that plays a pivotal role in communication during transmission and reception of signals. Presence of lumped elements along a signal path or around a region of interaction of incoming waves with surface may trigger distortion in the signals, leading to loss or damage of information. Generally, electronic lumped components are used but their functional abilities are limited during practical operations. The present disclosure addresses the unresolved problems of the conventional system by providing a system and method for real time multi-frequency operation using metasurface-based mechanically controlled tunable polarization conversion. In the present disclosure, a multi-band polarization converter design is provided whose operational parameters including (i) bands of operation, (ii) bandwidth, and (iii) number of bands are controlled together by modulating an air-gap of a reflective unit cell of a two-dimensional array structure of a metasurface using a motorized mechanical arrangement.

The utility model relates to a high-voltage shore power system for a passenger ship, which comprises shore-end power supply equipment and ship-end access equipment, and the shore-end power supply equipment comprises a shore-end high-voltage power distribution cabinet and a shore-end cable winch. The ship end access equipment comprises a port shore power socket box, a starboard shore power socket box, a ship end high-voltage power distribution cabinet, a high-voltage transformer, a first frequency converter, a second frequency converter, a first main power distribution board and a second main power distribution board; according to the system, the equipment layout of a shore end and a ship end is changed, a cable winch is replaced from the ship end to the shore end, socket boxes are arranged on a left ship board and a right ship board respectively, the loading weight of a ship is reduced, occupation of a shore power system on the space of the ship end is optimized, a previously designed multifunctional ship frequency converter is utilized, additional arrangement of a frequency converter special for a high-voltage shore power system is avoided, and the cost is reduced. Two frequency converters and a main distribution board on large ships such as a luxury cruise ship and a high-end ro-ro passenger ship are connected to a shore power system, the additional arrangement cost is reduced, the system redundancy is improved, the average load is achieved, and the stability is improved.

The invention discloses a modular multilevel converter design method, system, device and medium, and belongs to the field of converter design. The method comprises the following steps: obtaining a reference active overload current and a reference modular multilevel converter; determining a reference lower bridge arm modulation voltage, a DC voltage and a bridge arm sub-module rated voltage of the reference modular multilevel converter; obtaining a target converter transformer transformation ratio based on an active overload-converter transformer transformation ratio relation algorithm and the reference active overload current; obtaining a target converter modulation voltage based on the capacitive reactive constraint condition and the target conversion transformer ratio; obtaining the number of newly added bridge arm sub-modules based on the reference lower bridge arm modulation voltage, the DC voltage, the target converter modulation voltage and the rated voltage of the bridge arm sub-modules; and updating the reference modular multilevel converter based on the number of the newly added bridge arm sub-modules and the transformation ratio of the target converter transformer to obtain a target modular multilevel converter. Therefore, the adaptability of the overload operation capability of the modular multilevel converter is improved.