Abstract: Various example embodiments are disclosed. According to one example embodiment, a charging probe may include an alternating current (AC) input configured to receive current from an AC source, a rectifier circuit configured to rectify the current received from the AC source, a primary coil, and a control circuit configured to convert the rectified current into a regulated voltage across a primary coil. The primary coil may be configured to induce a magnetic field from the regulated voltage.

Abstract: Disclosed is a PWM rectifier in which switching losses in a semiconductor device are reduced without degrading the response of a control system. In a PWM overmodulation region, the modulation scheme is set to a three-phase modulation scheme. In other regions, a switchover condition such as the amplitude of an input current is acquired and compared with a switchover level. If the switchover condition equals or exceeds the switchover level, the modulation scheme is switched over to a modified two-phase modulation scheme which reduces the number of switching operations to two thirds for the same PWM frequency.

Abstract: A converter station for connecting an AC system to a bipolar HVDC transmission line. A DC neutral arrangement is provided with first DC breakers enabling breaking of a first current path from a neutral bus of one pole of the transmission line to a neutral bus of another pole at bipolar operation of the station for isolation of a faulty section and changing to monopolar operation/metallic return thereof. The DC neutral arrangement has in the first current path at least two first DC breakers connected in series and adapted to act as a backup for each other would the other thereof fail to break the first current path upon a control to isolate a faulty section by changing from bipolar to monopolar operation.

Abstract: Provided is a reference voltage circuit capable of generating a temperature-independent reference voltage more stably. Each of N-type metal oxide semiconductor (NMOS) transistors (1) and (2) has a source and a back gate that are short-circuited, and hence threshold voltages (Vth1) and (Vth2) of the NMOS transistors (1) and (2) respectively depend only on process fluctuations in the NMOS transistors (1) and (2) and not on process fluctuations in other elements. As a result, a temperature-independent reference voltage (Vref) may be generated more stably.

Abstract: A repeater circuit. The repeater circuit includes two input circuits, two intermediate circuits, and two output circuits. Responsive to a transition of an input signal from one logic level to another level, one of the input circuits is activated. The corresponding intermediate circuit is activated corresponding to activation one of the input circuits, and in turn, the corresponding output circuit is activated, which then drives an output signal on an output node. After a delay, a feedback signal conveyed via a feedback path deactivates the corresponding intermediate circuit and the corresponding output circuit. After deactivation of the corresponding output circuit, a keeper circuit continues to provide the output signal on the output node. The other one of the two input circuits inhibits activation of the other one of the intermediate circuit responsive to the transition, which results in the other output circuit also being inhibited from activation.

Abstract: A technique reduces effects of power supply noise on a signal output by an integrated circuit output driver circuit powered at least partially by an external power supply. An integrated circuit includes a first circuit that provides a first version of a signal to be output referenced between a first regulated voltage and a first power supply voltage of an external power supply. A second circuit provides a second version of the signal to be output referenced between a second regulated voltage and a second power supply voltage of the external power supply. A third circuit provides a third version of the signal to be output referenced between the first power supply voltage and the second power supply voltage and based on the first and second versions of the signal to be output and power received from the external power supply.

Abstract: A power supply device, comprising first and second lead terminals for connection with a load, a fuel cell, an energy storage element connected between the first and second lead terminals, a synchronous-rectification switching power-source portion for converting the output voltage of the fuel cell to the output voltage of the energy storage element and outputting it to the first and second lead terminals, and a current-detecting portion for detecting the output current of the fuel cell, the switching power-source portion further comprising a first switching element connected to the energy storage element in series, a second switching element connected to the energy storage element in parallel, and a simultaneous-turn-off controller for turning off the first and second switching elements simultaneously when the output current detected by the current-detecting portion is not larger than a preset current threshold.

Abstract: A method for voltage stabilization of an electrical power network system including a producing power network system side, a consuming power network side including a power load, a power transmission line with an impedance ZLN, a transformer and an on-line tap changer added to the transformer. The impedance of the line is measured in case of dynamic instabilities. A transformer ratio n is controlled by changing a voltage reference Vref of the on-line tap changer. The voltage reference is changed according to a feed forward compensation from the impedance of the line.

Abstract: A power adapter includes an insulation casing. A plug module has at least one plug pin which defines a plug end protruding out of the insulation casing and an inserting end opposite to the plug end received in the insulation casing. The insulation casing receives a printed circuit board, at least one connecting member and conductive member therein. The conductive member is fixed on the printed circuit board and defines a receiving space. The connecting member has a contact portion received in the receiving space of the conductive member for electrical connection therebetween and a retaining portion connecting with the inserting end of the plug module. The assembly structure of the power adapter is simplification.

Abstract: Each phase of a three-level power converting apparatus is configured by a single unit, and four switching devices (1u-4u) and two diodes (9u, 10u) provided in each unit are arranged along a flow direction of cooling air on a heat sink (15) of a cooling device with long sides of the switching devices (1u-4u) and the diodes (9u, 10u) oriented perpendicular to the flow direction of the cooling air. The first and second diodes (9u, 10u) are arranged in a central area of the heat sink (15), whereas the second switching device (2u) and the third switching device (3u) with high heat generation loss are arranged in a distributed fashion to sandwich a group of diodes in the central area in between.

Abstract: A system and a method that uses primary side sensing to regulate the output voltage at a cable end without any remote sensing of cable connections back from the load. This is accomplished by approximating the current from the control voltage in the control loop through the relationship that defines the Ton time in terms of the control voltage Vc. Once the approximation of the output current is known, it is multiplied by a known fixed cable resistance, and this value is subtracted from the feedback sensor output before it is subtracted from the digital reference. This forces the regulator to raise the output voltage by the amount of drop across the cable, causing the output of the cable to be maintained at the targeted regulation point.

Abstract: The present invention relates to a converter circuit and a conversion method for converting an input signal of a first value to an output signal of a second value based on a switched operating mode, wherein an output feedback loop (40) and an additional input forward control loop (60) are provided. The additional input forward control loop (60) serves to correctly control a switching parameter not only with respect to the output load but also over a wide input voltage range. This leads to an improved power efficiency and reliability of the converter circuit.

Abstract: An arrangement having a first converting element configured to convert an input current linearly into an auxiliary current, a second converting element configured to convert the auxiliary current into an output voltage, and a separating element configured to separate slow changes of the auxiliary current from fast changes of the auxiliary current, wherein the first, second, and separating elements are arranged as a dynamic control loop regulating the input current with the slow changes.

Abstract: To provide a control circuit and control method of a step-up/step-down type DC-DC converter capable of realizing high efficiency. In a state (1), a terminal Tx of a choke coil L1 is connected to an input terminal Tin, and a terminal Ty is connected to a reference potential. In a state (2), the terminal Tx is connected to the reference potential, and the terminal Ty is connected to an output terminal Tout. In the state (3), the terminal Tx is connected to the input terminal Tin, and the terminal Ty is connected to the output terminal Tout. A first period operation TO1 is constituted by the states (1) and (2), and a second period operation TO2 is constituted by the states (1) and (3). A second period T2, in which the second period operation TO2 is performed, is a value n times as long as a first period T1, in which the first period operation TO1 is performed. In the second period operation TO2, the state (1) is switched to the state (3) so that an increasing slope of an inductor current IL is reduced.

Abstract: A power inverter comprises at least a box-shaped housing; and a power module, a smoothing capacitor, a base plate made of a flat plate, and a rotating electric machine control circuit board arranged in order in the housing. The base plate is arranged with the fringes fixed to the inner wall surfaces of the housing, and the smoothing capacitor and rotating electric machine control circuit board are fixed.

Abstract: A constant current source apparatus is provided that includes a complementary switching section that selectively outputs a reference voltage or a driving voltage according to a control signal and a constant current source circuit that causes a constant current determined by the reference voltage to flow to a load in a case where the reference voltage is received from the complementary switching section and cuts off the current flowing to the load in a case where the driving voltage is received from the complementary switching section.

Abstract: Various example embodiments are disclosed. According to one example embodiment, a charging probe may include an alternating current (AC) input configured to receive current from an AC source, a rectifier circuit configured to rectify the current received from the AC source, a primary coil, and a control circuit configured to convert the rectified current into a regulated voltage across a primary coil. The primary coil may be configured to induce a magnetic field from the regulated voltage.

Abstract: A current-mode controlled DC/DC converter receives an input voltage (Vb) and supplies an output voltage (Vo). A controllable switch (S1) is coupled to an inductor (L) to obtain a periodically varying inductor current (IL) through the inductor (L). A current-mode controller (1) compares (10) the output voltage (Vo) with a reference voltage (Ver) to Obtain an error signal (ER), and applies (11) a transfer function on the error signal (ER) to obtain a control signal (CO; CIO). A correction circuit (7) adds to the control signal (CO; ICO) a correction signal (ICR) representative for a difference between an original value of the control signal (CO; ICO) and an average value of the inductor current (IL) to obtain a modified control signal (MCO; IMC).

Abstract: A flyback switching power supply capable of regulating an operation frequency based on a current regulation mechanism is disclosed. The flyback switching power supply includes a transformer, a switch, a switch control circuit, and a regulation circuit. The transformer includes a primary winding for receiving an input voltage, a secondary winding for generating an output voltage, and an auxiliary winding. The switch is serially connected to the primary winding for controlling a current flowing through the primary winding. The switch control circuit has a frequency control port and functions to work around an operation frequency for controlling the switch. The operation frequency is under control by a frequency setting current flowing through the frequency control port. The regulation circuit is electrically coupled between the auxiliary winding and the frequency control port. The regulation circuit adjusts the frequency setting current based on an induced current generated by the auxiliary winding.

Abstract: A magnetic interface circuit (100) includes a pair of channels (101, 102) and an absorb network (3). Each channel includes a 3-wire common mode choke (2) having a middle tap (21), and an isolation transformer (1) connected with the 3-wire common mode choke. The isolation transformer has a primary winding (11) and a secondary winding (12) each having a pair of first output taps (111, 121) and a first center tap (13, 14). The absorb network includes a bridge rectifying circuit (4) adapted for converting an electrical current. Each bridge rectifying circuit has a pair of input taps (45, 46) each connected with corresponding center taps of the isolation transformers, and a pair of output taps (47, 48).