Abstract: A power converter is provided. The power converter includes first to fourth switches electrically connected in series, a flying capacitor and a controller. Positive and negative terminals of the flying capacitor are electrically connected to the second and third switches respectively. The controller operates the first and fourth switches to perform a first complementary switching with a first dead time, and operates the second and third switches to perform a second complementary switching with a second dead time. The controller determines to regulate the first or second dead time by detecting a capacitor voltage of the flying capacitor, such that the capacitor voltage of the flying capacitor is maintained within a balance voltage range.

Abstract: A power conversion circuit for driving motor and a control method thereof are provided. The control method includes: comparing a control command with a carrier wave to acquire a PWM signal; identifying whether a phase difference between the output voltage and current falls within a range; if the phase difference falling within the range, determining whether a zero-sequence voltage is positive or negative according to the output voltage and current; injecting the zero-sequence voltage into the control command to acquire a synthesized command, and detecting maximum and minimum voltage values of the synthesized command after a period; according to the zero-sequence voltage determined to be positive or negative, selecting the maximum or minimum voltage value to perform a logic reversal operation; after stopping injecting the zero-sequence voltage, acquiring an output expected value; and comparing the output expected value with the carrier wave for adjusting a duty ratio of PWM signal.

Abstract: An immersion cooling system is provided. The immersion cooling system includes a box, an upper cover, plural fixing components, plural latches and a link module. The box has an opening upwardly. The upper cover covers the opening. The fixing components are disposed on the box and arranged adjacent to the outer perimeter of the opening. The latches corresponding to the fixing components are disposed on the upper cover. The link module includes plural crossbars corresponding to the latches. The link module moves downwardly close to the upper cover, scroll-wheels of the latches roll along limiting surfaces of corresponding fixing components and press against the upper cover, the upper cover closes the opening to form an airtight space. The link module moves upwardly away from the upper cover, the scroll-wheels are separated away from the limiting surfaces of corresponding fixing components, allows the upper cover to separate from the opening.

Abstract: A speed reducer comprises a transmission shaft, an eccentric wheel, a first wheel assembly, a rotating wheel and a second wheel assembly. The first wheel assembly comprises a first wheel disc and at least one first roller. The at least one first roller is disposed on the inner wall of first wheel disc. The rotating wheel comprises a main body comprising an outer ring structure and a concave structure. The outer ring structure comprises at least one first tooth. The at least one first tooth is in contact with the corresponding first roller. At least one second roller is disposed within the concave structure. The second wheel assembly comprises a second wheel disc and at least one second tooth. The at least one second tooth is disposed on an outer periphery of the second wheel assembly. The at least one second tooth is in contact with the corresponding second roller.

Abstract: An embedded power supply apparatus is partially buried in an enclosed structure, is configured to provide a first DC voltage to a plurality of electronic devices, and includes a first power conversion circuit, a plurality of switch circuits, a human-machine interface module and a control circuit. The first power conversion circuit is configured to convert an input AC voltage into the first DC voltage and provide the first DC voltage to the switch circuits. The switch circuits each is configured to selectively transmit the first DC voltage to a corresponding electronic device of the electronic devices according to a corresponding first control signal of a plurality of first control signals. The control circuit is configured to receive a second control signal generated by the human-machine interface module, and generate the first control signals to the switch circuits according to the second control signal.

Abstract: An electrical connector includes a housing having a front end and a rear end, an insulator including a tongue portion disposed at the front end and a base disposed at the rear end, and plural terminals including plural ground terminals, plural power terminals and plural signal terminals. Each of the plural terminals has a first contact portion, a second contact portion and a connection portion connecting the first contact portion with the second contact portion. The first contact portions are disposed on surfaces of the tongue portion in a widthwise direction perpendicular to a direction from the front end to the rear end, and the second contact portions are extended out from the base. Widths in the widthwise direction of the second contact portions of the plural ground terminals and the plural power terminals are larger than a width of the first contact portion respectively thereof.

Abstract: A bobbin structure, a magnetic element and a method for leading out a coil are provided. The bobbin structure includes a main body, a guide part and lead-out sleeve. The main body is used for winding a coil; the guide part is disposed at an end portion of the main body in a vertical direction, where, a guide channel is provided in the guide part; the lead-out sleeve is disposed on the guide part and configured to communicate with the guide channel, the lead-out sleeve includes an accommodating structure with an opening, and the accommodating structure is configured to protrude from the guide part; the guide channel is used to guide a coil end into the accommodating structure, the accommodating structure is malleable and configured to be able to close the opening after being pressed to form a closed annular space for wrapping the coil end.

Abstract: An integrated transformer includes: two magnetic cores, wherein each magnetic core includes two magnetic yokes arranged opposite to each other along a first direction and two magnetic columns located between the two magnetic yokes, the two magnetic columns are arranged opposite to each other along a second direction; two short-circuited magnetic blocks, wherein one magnetic yoke in one of the magnetic cores is connected to one magnetic yoke in the other magnetic core through one of the short-circuited magnetic blocks to connect the two magnetic cores in series into a ring; four first windings, wound on four magnetic columns of the two magnetic cores, respectively; and a second winding, wound on the magnetic core or the short-circuited magnetic block, wherein magnetic flux directions generated by the second winding in two magnetic columns of any one of the magnetic cores are the same.

Abstract: A circular current suppression method, a switch control device, and a power conversion system are disclosed, which convert a difference between a voltage converted from a common-mode current of several input currents of a power factor corrector and a bus-voltage difference into a reference current, convert a difference between a reference voltage and a total voltage into a total DC current, and add cosine even-numbered-harmonic components of the reference current based on the total DC current, a target current, and one of several input currents to calculate a compensation current that is converted into a voltage as one of at least one switching command output to the power factor corrector, thereby suppressing the circular current in a configuration of parallel power conversion modules.

Abstract: A power supply device is disclosed and includes a housing, a power board, an output terminal and a DCDC conversion module. The housing includes an accommodation space, and a first opening of a rear plate in communication with the accommodation space. The power board disposed in parallel to the lower plate is at least partially accommodated in the accommodation space, and a peripheral edge is disposed adjacent to the rear plate. The output terminal is disposed in parallel to the lower plate, and passes through the first opening of the rear plate. The DCDC conversion module is accommodated in the accommodation space and includes a primary circuit, a transformer and a secondary circuit. The transformer and the secondary circuit are arranged on the power board in sequence. The secondary circuit is arranged on part of the power board existing the peripheral edge and electrically connected to the output terminal.

Abstract: An inverter assembly is disclosed and includes a base, a contact terminal, an output copper busbar and an elastic component. The output copper busbar is disposed on the base. The output copper busbar includes an output portion configured to electrically connect with the contact terminal. The elastic component is disposed on the base and includes an abutting element, an elastic element and an accommodation seat. The accommodation seat is disposed on the base, the abutting element is connected to the accommodation seat through the elastic element along an axial direction. When the base is docked with the contact terminal, the abutting element of the elastic component abuts against the output portion to attach to the contact terminal, and the contact terminal abuts against the abutting element and the elastic element, so that a restoring force provided by the elastic element keeps the output portion abutting against the contact terminal.

Abstract: A vehicle seat includes a first hinge rotatably supporting a left seatback framework and a second hinge rotatably supporting a center seatback framework. The first hinge includes a first base bracket and a first hinge bracket continuous to the first bracket, and the second hinge includes a second base bracket and a second hinge bracket continuous to the second base bracket. Each of the first hinge and the second hinge has a frame bracket coupled to the corresponding seatback framework and a shaft about which the hinge rotates. An urging member is wound on the shaft. A joining part joins a distal end of the first hinge bracket of the first hinge to a distal end of the second hinge bracket of the second hinge.

Abstract: An electric motor includes a motor main body and an inverter. The inverter is axially stacked on one end of the motor main body, and the inverter includes a gate driver, a control circuit, a capacitor module, a DC bus bar, a plurality of power modules and a plurality of AC bus bars. The power module includes a plurality of AC output terminals, a plurality of DC input terminals and a plurality of signal terminals, and the AC bus bars are respectively connected to corresponding AC output terminals and extend downward to a motor coil of the motor main body. The power modules and the corresponding DC input terminals are annularly arranged around the capacitor module, the DC bus bar is extended and electrically connected to the corresponding DC input terminals and the capacitor module.

Abstract: A bi-level dimming LED power supply equipment adjusts the brightness of a plurality of LED lights according to whether an external detection switch is triggered turned on. The LED power supply equipment includes a plurality of LED power supplies, and the LED power supplies respectively include an input end and an output end. The input end receives an input voltage, and the output end includes a bus positive end, a bus negative end and a dimming end. The dimming end is commonly coupled to a first end of the external detection switch, and one of the bus positive end or the bus negative end is commonly coupled to a second end of the external detection switch and one end of the LED lights, and the other one of the bus positive end or the bus negative end is respectively coupled to the other ends of the LED lights.

Abstract: A cofferdam is disclosed that includes an open frame structure having double walls defining a hollow space within each double wall, with each double wall having an open bottom end and a closed top end. Each of the double walls are configured to act as suction piles allowing liquid to be removed from the space within each double wall to thereby induce negative pressure when the cofferdam is installed in a sub-sea configuration. Each of the double walls may include a plurality of partitions respectively defining a plurality of suction piles, the suction piles fluidically coupled by a manifold that may allow liquid to be removed from the suction pile to thereby drive the cofferdam structure into the subsea surface due to the induced negative pressure. A further embodiment cofferdam structure includes an open frame structure and one or more suction piles attached to the open frame structure.