Abstract: A leakage transformer is provided. The leakage transformer includes a first plate, a second plate, a plurality of winding pillars, a primary winding, a secondary winding and a plurality of magnetic shunt elements. Each magnetic shunt element is disposed between the two corresponding winding pillars, and there is a gap between every two neighboring magnetic shunt elements. Alternatively, the magnetic shunt element is disposed on the first plate and aligned with the corresponding winding pillar, and there is a gap between the magnetic shunt element and the second plate. A leakage inductance of the leakage transformer is determined by the gap.

Abstract: The present disclosure discloses a design and test method of a test plan. The test plan includes the plurality of input parameters, the plurality of output parameters, the plurality of system parameters, all of the numerical levels or the types of each input parameter, each output parameter and each system parameter. The test plan includes a plurality of test cases to cover combination conditions including a great number of the input parameters, the output parameters and the system parameters and their dynamic cross of the parameters. The design and test method performs the test cases of the test plan on the product automatically by considering overall possibly parameters and their levels associated with the product. The overall possibly parameters and their levels associated with the product can be tested before the product is dispatched to the customer so as to enhance the product quality.

Abstract: Power module includes transformer unit including primary and secondary windings and magnetic core; first and second capacitor units coupled to first terminal of primary winding of transformer unit through first node; first and second external pins respectively coupled to first terminal of first capacitor unit and second terminal of second capacitor unit; first and second switch units coupled to second terminal of primary winding of transformer unit thorough second node; third and fourth external pins respectively coupled to first terminal of first switch unit and second terminal of second switch unit; secondary-side circuit coupled to secondary winding; and fifth and sixth external pins electrically coupled to first and second output terminals of secondary-side circuit, respectively. First external pin is coupled to one of third and fourth external pins selectively.

Abstract: A resonant power converter and a current synthesizing method therefor are provided. The resonant power converter includes a switch circuit, a resonant tank, a transformer, a rectifier circuit, and a current synthesizing module. The switch circuit receives an input voltage from an input source, and the rectifier circuit outputs an output voltage to a load. The current synthesizing module includes a sensing circuit, a peak hold circuit, and a calculation unit. The sensing circuit is configured to sense a resonant capacitor voltage on a resonant capacitor of the resonant tank. The peak hold circuit is configured to receive the resonant capacitor voltage and acquires a peak value thereof. The calculation unit is configured to receive the peak value, a switching frequency, the input voltage, the output voltage, and a resonant capacitance of the resonant power converter and generate a synthesized output current accordingly.

Abstract: A power generating method for a wireless power transmission device includes the following steps. Firstly, a power transmitting circuit is switched between an enabled state and a disabled state. When the power transmitting circuit is in the enabled state, the power transmitting circuit emits a first power and the power receiving circuit converts the first power into a second power. Then, the second power is converted into an output power, and the second power is converted into an auxiliary power. If the first power is not received by a power receiving circuit, the above steps are repeated. If the first power is received by the power receiving circuit, the power transmitting circuit is continuously in the enabled state, so that the auxiliary power is continuously generated.

Abstract: The present disclosure provides a power module, a power module assembly and an assembling method thereof. The power module assembly includes a housing, a resilient bracket, a circuit board, a power device and a fastening unit. The housing includes a first heat-dissipation surface. The resilient bracket is pre-fastened on the housing. The resilient bracket is located near the first heat-dissipation surface and configured with the first heat-dissipation surface to form an accommodating space. The circuit board is configured to assemble on the housing. The power device is plugged in the circuit board and accommodated in the accommodating space. The fastening unit is pre-fastened on the housing and pressing the resilient bracket. While the resilient bracket pushes against the power device, the power device is attached to the first heat-dissipation surface.

Abstract: A wireless power transmission device includes a transmitter unit and a receiver unit. The transmitter unit converts an input DC power into an inverted AC power, the receiver unit receives the AC power through a coupling effect. A fault protection method is also provided in the present disclosure. If the receiver unit is abnormal, a main power circuit of the receiver unit is short-circuited. Then, a phase relationship between an inverted AC voltage and an inverted AC current of the inverted AC power is detected. A phase judgment signal is generated according to the phase relationship. An overcurrent judgment signal is generated according to the amplitude of the inverted AC current and a predetermined current threshold. A fault signal is generated according to the phase judgment signal and the overcurrent judgment signal. In response to the fault signal, the wireless power transmission device is controlled to shut down.

Abstract: A wireless power transmission device includes a contactless transmitter unit, a contactless receiver unit and a step-down transformer. The transmitter unit receives an input AC power. A receiver coil of the receiver unit and a transmitter coil of the transmitter coil are electromagnetically coupled with each other. The input AC power is electromagnetically coupled to the receiver coil through the transmitter coil. Consequently, the input AC power is converted into a first output AC power. A first coil and a second coil of the step-down transformer are electromagnetically coupled with each other. The first coil is electrically connected with the receiver coil to receive the first output AC power. A second output AC power is outputted from the second coil. A turn ratio of the first coil to the second coil is larger than a turn ratio of the transmitter coil to the receiver coil.

Abstract: A control circuit for a wireless power transmission device is provided. The wireless power transmission device includes a transmitter unit and a receiver unit. The control circuit includes a transmitter detecting unit, a first control unit and a driver unit. The transmitter detecting unit obtains an input power of the transmitter unit and generates an input power signal. The first control unit generates a control signal according to a result of comparing the input power signal with a reference input power signal. The driver unit drives switching devices of the transmitter unit according to the control signal. Consequently, the input power of the transmitter unit is adjusted, and an output ripple or a magnitude of the output of the receiver unit is adjusted.

Abstract: A synchronous rectification module includes a transformer, a first conducting member and a synchronous rectification unit. The transformer includes plural secondary winding assemblies. The outlet ends of the secondary winding assemblies are protruded out from a first lateral region and a second lateral region of the transformer. The first conducting member is located at a third lateral region of the transformer. The synchronous rectification unit includes a first circuit board and a second circuit board. The first circuit board is connected with the first conducting member and located at the first lateral region. The second circuit board is connected with the first conducting member and located at the second lateral region. The outlet ends of the secondary winding assemblies are penetrated through corresponding first insertion holes of the first circuit board and corresponding second insertion holes of the second circuit board.

Abstract: A welding column combination includes at least two metal welding columns and at least one insulator block. Each metal welding column has a first end and a second end opposite to the first end, wherein at least one of the metal welding columns has welding surfaces at the first end and the second end respectively. The at least one insulator block assembles the at least two metal welding columns as a unitary physical combination.

Abstract: A power conversion device includes a thermal conductive substrate, a DC-to-DC converter circuit assembly, an on board charger module (OBCM) circuit assembly and at least one electric wire. The thermal conductive substrate has a first surface and a second surface opposite to each other. The DC-to-DC converter circuit assembly is disposed on the first surface. The OBCM circuit assembly is disposed on the first surface as well. An end of the electric wire connects with the DC-to-DC converter circuit assembly, another end of the electric wire connects with the OBCM circuit assembly.

Abstract: An ORing circuit is provided. The ORing circuit includes an input port, an output port, an ORing FET, a comparing circuit, a first transistor and a second transistor. The ORing FET is connected between the input port and the output port and comprises a source connected with the input port, a gate and a drain connected with the output port. The comparing circuit is connected with the input port and the gate. The first transistor comprises a first terminal, a second terminal and a third terminal. The first terminal is connected with the input port and the source, and the third terminal is connected with the gate. The second transistor comprises a fourth terminal, a fifth terminal and a sixth terminal. The fourth terminal is connected with the output port and the drain, and the sixth terminal is connected with the second terminal of the first transistor.

Abstract: A power conversion device includes a main board, a connector module, an input conversion module, a capacitor, an output conversion module, a control module and a conducting part. The main board includes two lateral edges along a first direction and two lateral edges along a second direction. The connector module is mounted on the main board, and includes an input connector and an output connector. The output connector is located under the input connector. The input conversion module, the output conversion module and the control module are perpendicularly mounted on the main board. The conducting part is in parallel with the control module and electrically coupled with the input connector or the output connector. The connector module, the input conversion module, the capacitor and the output conversion module are mounted on the main board and arranged in a line along the second direction.

Abstract: The invention relates to an integrated magnetic component (802) for a power converter including N>=2 LLC converters configured for interleaved operation. The integrated magnetic component (802) includes a first yoke and a second yoke and for each LLC converter a winding carrying leg which comprises a primary winding (820c) and a secondary winding (821c), wherein the primary winding (820c) and the secondary winding (821c) are wound on the respective winding carrying leg. The integrated magnetic component (802) further includes one or more return legs. Herein the winding carrying legs and the one or more return legs are arranged side by side, each leg being magnetically connected to both yokes and the winding carrying legs include a transformer air gap (819) whereas the at least one return leg is air gap free and at least one return leg is arranged between two winding carrying legs.

Abstract: A rectification module includes a transformer, a connecting unit and a rectification unit. The transformer includes a first lateral region, a second lateral region and at least one secondary winding assembly. The second lateral region is located beside the first lateral region. The secondary winding assembly includes plural outlet ends. The plural outlet ends are arranged near the first lateral region. The connecting unit is located at the first lateral region, and includes plural conducting plates. Each of the conducting plates includes at least one opening and at least one connecting structure. The conducting plates are partially or completely stacked on each other. The outlet ends are accommodated within the corresponding openings. The conducting plates are fixed on the first lateral region. The connecting structures face the second lateral region. The rectification unit includes a circuit board and plural rectifier components.

Abstract: A multi-channel power source includes at least one first power conversion unit, at least one second power conversion unit and a heat dissipation device. The first power conversion unit has a plurality of first subsidiary units. The first subsidiary units are electrically connected with each other. Each of the first subsidiary units has at least one first heating element. The second power conversion unit has a plurality of second subsidiary units. The second subsidiary units are electrically connected with each other. Each of the second subsidiary units has at least one second heating element. The heat dissipation device is configured to dissipate a heat generated by the first heating elements and the second heating elements along at least one heat dissipation medium direction. The first subsidiary units and the second subsidiary units are arranged in an at least partially staggered manner along the heat dissipation medium direction.

Abstract: A power conversion device includes a main board, an electromagnetic interference filter module, an auxiliary power module, a capacitor group, a main power unit, a control plate, an output bus bar and a fan. A first air channel is formed between the auxiliary power module and the electromagnetic interference filter module. A second air channel is formed between two rows of the capacitor group. A third air channel is formed between the two main power conversion modules of the main power unit. The control plate is perpendicularly installed on the main board. The output bus bar is perpendicularly installed on the main board, arranged in parallel with the control plate and located near the control plate. The fan is located near the main power unit and producing airflow to the first air channel, the second air channel and the third air channel.

Abstract: A charging system and a method are provided. The charging system includes a power supply device, a charging module and a battery module. The charging module is detachably connected with the power supply device, and connected with the battery module. The charging module includes a power converting unit, a voltage regulator and a charging controller. When the power supply device and the charging module are connected with each other, the power converting unit of the charging module is in the backward direction and uses the electric power of the battery module to pre-charge a bus capacitor. If the voltage of the bus capacitor is higher than or equal to a first threshold value because of pre-charge, the voltage of an adjusting terminal of the charging module is adjusted. Consequently, the charging system is in a normal working mode.