25 results about "Converter design" patented technology

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.

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.

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.

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.

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 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 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.

The present application belongs to the field of electric locomotive application, and particularly relates to a novel multi-topology conversion traction converter and a control method thereof. The present application solves the technical problem that the main circuit topology structure of the traction converter is determined in the current traction converter design, and cannot be converted according to the actual scene or working condition. When a switching device in the power module of the traction converter is damaged, the whole vehicle power loss is caused, and the reliability and operation efficiency of the locomotive operation are greatly affected. The present application optimizes the main topology of the traction converter, adopts modular design, reduces the types of power modules, reduces the inventory of spare parts, and the main topology structure of the four-quadrant converter can be flexibly converted according to the scene demand. When the switching device is damaged, the normal operation of the traction converter can still be realized through topology switching. The application environment and application working condition are redundantly designed, and the reliability and operation efficiency of the traction converter are greatly improved.

The application provides a low common-mode noise double full-bridge converter design method of flying bypass capacitor, by analyzing the common-mode equivalent path and noise source characteristics of the double full-bridge converter considering the parasitic parameters, a flying bypass capacitor is arranged between the specific high-frequency node and the reference node of the double full-bridge converter, which is used for providing a low-impedance bypass path for the high-frequency common-mode noise current, and part of the high-frequency common-mode current is locally closed in the converter through the flying bypass capacitor to reduce the common-mode noise; by constructing the low-impedance high-frequency common-mode return path in the converter, the common-mode noise is reduced to be transmitted to the outside, the electromagnetic compatibility performance of the converter is improved, and the volume, weight and cost of the external EMI filter are reduced.

This invention discloses a method and device for determining the voltage fluctuation of a submodule capacitor in a modular matrix converter, belonging to the field of flexible low-frequency power transmission technology. By constructing a complete method chain of "electrical quantity acquisition → bridge arm current and power calculation → power-voltage dynamic modeling → analytical derivation of fluctuation," it achieves a systematic and analytical determination of the voltage fluctuation of the bridge arm submodule capacitor. This method eliminates the reliance on simulation or empirical formulas, enabling efficient performance evaluation and parameter optimization in the early stages of design. It also provides key theoretical basis for control strategy design, device stress analysis, and system reliability assessment, significantly improving the scientific rigor, foresight, and economy of frequency converter design.

The invention relates to an on-board charger (1) for an electric or hybrid vehicle, comprising a mains connection (U, N) for an external AC power supply, a rectifier (2) and a galvanically isolated DC / DC converter (3), wherein at least one capacitor (CB) is arranged between the rectifier (2) and the DC / DC converter (3), wherein at least one control unit (7, 9) is provided for controlling the rectifier (2) and the DC / DC converter (3), wherein the galvanically isolated DC / DC converter (3) is designed as a resonant converter (6) which has a fixed control (9), and wherein the control unit (7) for the rectifier (2) is designed as a battery current regulator (8).

The present invention relates to a power converter and to a method for operating same, wherein the power converter is designed to receive two input potentials DC+ and DC−, the power converter comprising a first anti-interference capacitor in order to connect the input potential DC+ capacitively to earth, a second anti-interference capacitor in order to connect the input potential DC− capacitively to earth, a first voltmeter for measuring a first voltage drop Uyp across the first anti-interference capacitor, a second voltmeter for measuring a second voltage drop Uyn across the second anti-interference capacitor, and a calculation unit which is designed to determine a DC link voltage Uzk dropping between the input potential DC+ and the input potential DC− using the first voltage drop Uyp and the second voltage drop Uyn.

This invention discloses an automatic construction method for DC-DC converters based on loop matrices. This method utilizes a two-mode loop matrix generated by the flux balance design method or the state equation method to construct all DC-DC converters that conform to the loop matrix. The process includes: converting the mode 1 loop matrix into a branch-node relationship matrix; adding a switch to each basic loop; selecting two non-adjacent nodes and connecting a diode in parallel until the number of diodes and switches is equal; disconnecting the switches and short-circuiting the diodes, while simultaneously removing other incomplete branches; searching for loops using a depth-first search algorithm to form the loop matrix; comparing the obtained loop matrix with a given mode 2 loop matrix; if they are the same, recording them as the corresponding branch-node relationship matrix; and finally outputting a redundancy-free, fully functional DC-DC converter. Compared with traditional manual converter design methods, this invention offers speed, determinism, and completeness.

A converter including a semiconductor module and a cooling housing. The semiconductor module includes a semiconductor chip, a substrate having a first side and a second side, a base plate having a first side and a second side, and a molding compound. The semiconductor chip connects to the first side of the substrate. The second side of the substrate connects to the first side of the base plate, the second side of the base plate has a first region and a second region. The first region has a surface expansion, and the first region having the surface expansion contacts with a coolant liquid in an operating state. The second region forms a closed path around the first region, the cooling housing has a plate including at least one hole, and the plate is connected around the hole to the second region of the base plate by welding.

A DC-to-DC converter for an electrical aircraft propulsion system designed to be connected in series with an electrical energy storage unit of the electrical propulsion system. The DC-to-DC converter includes an inverter, a transformer and a rectifier, and further includes a current source that is connected to the rectifier and is configured to control the power passing through the DC-to-DC converter. The transformer includes a primary and two secondaries, the two secondaries sharing a common terminal designed to be connected to a high-voltage DC bus of the electrical propulsion system and two other terminals that are connected to the rectifier. The rectifier includes two arms including at least two transistors that are each in series and are connected, on the one hand, to the two other terminals of the transformer and, on the other hand, to the current source.