Abstract: An ion wind generating device includes a high voltage power supply, a capacitor connected in parallel to the high voltage power supply, a first metal cone connected in series to the high voltage power supply, a ground plate disposed on the same axis as the first metal cone, a starter motor, and a second metal cone disposed on a connecting shaft. The starter motor includes a rotating shaft and a connecting shaft perpendicular to the rotating shaft. After second metal cone moves to be located between first cone and the ground plate, the starter motor stops rotating. The high voltage power supply charges the capacitor with the high voltage power, and the capacitor discharges the first metal cone. When the second metal cone is located between the first metal cone and the ground plate, the first metal cone causes the second metal cone to discharge to generate an ionic wind.

Abstract: A method includes converting an input signal into an output signal in response to a modulation signal, generating a timeout signal in response to the modulation signal, generating a comparison signal according to the output signal, determining whether the comparison signal is equal to or greater than a sense signal, determining whether the timeout signal has a first logic value, and causing the modulation signal to have the first logic value when the comparison signal is equal to or greater than the sense signal and the timeout signal has the first logic value. A switching power supply circuit includes a power converter, a timer circuit generating the timeout signal, and a controller causing the modulation signal to have the first logic value when the comparison signal is equal to or greater than the sense signal and the timeout signal has the first logic value.

Abstract: A photovoltaic installation comprising at least one photovoltaic module (1) and an electromechanical unit capable of producing a non-stray electric arc of a duration less than or equal to a given arc-quenching duration (x) when contacts of the electromechanical unit are opened.

Abstract: The flyback converter generally has a capacitive divider operatively connectable to a voltage source for receiving an input voltage, the capacitive divider having a plurality of capacitive devices connected in series from one another; a transformer having a plurality of primary windings inductively coupled to at least one secondary winding, each one of the primary windings of the transformer being connected in parallel to a corresponding one of the capacitive devices of the capacitive divider via a switching device, each of the at least one secondary winding being connected to a forwardly biased and capacitive circuit connectable to an output load; and a controller connected to each one of the switching devices for operating the flyback converter to power the output load with the voltage source.

Abstract: A system comprises a first five-level inverter connected between a dc power source and an ac grid, a second five-level inverter connected between the dc power source and the ac grid and a third five-level inverter connected between the dc power source and the ac grid, wherein each five-level inverter comprises a first boost apparatus and a second boost apparatus.

Abstract: A buck converter may operate in a low power mode or a high power mode based on a power requirements of a load. In the high power mode, modifications to increase frequency response include a higher polling frequency for a comparator, a lower impedance divider in a feedback circuit, a higher biasing current for a comparator, and larger switches for providing current to a reactive step-down circuit of the buck converter. In the low power mode these modifications are reversed. The buck converter may make use of an improved strong arm comparator and a circuit for sensing presence of an inductor in the reactive step-down circuit.

Abstract: An electrostatic chuck is provided and has a holding surface for holding a wafer with a tape attached to one side of the wafer where the tape is in contact with the holding surface. The electrostatic chuck includes a disk-shaped member having a plurality of fine holes communicating with a vacuum source, where the fine holes are exposed to the holding surface. The disk-shaped member also includes a plurality of asperities formed on the holding surface and connected to the fine holes, and an electrode embedded in the disk-shaped member. The vacuum source is operated to produce a vacuum on the holding surface through the fine holes and thereby hold the wafer through the tape on the holding surface under suction, where the asperities formed on the holding surface function as a suction passage communicating with the fine holes.

Abstract: System and method are provided for regulating a power converter. The system includes a signal processing component configured to receive a first input signal and a second input signal, process information associated with the first input signal and the second input signal, and output a drive signal to a switch based on at least information associated with the first input signal and the second input signal. The first input signal is associated with at least a feedback signal related to an output voltage of the power converter. The second input signal is associated with at least a primary current flowing through a primary winding of the power converter. The signal processing component is further configured to change a peak value of the primary current within a first predetermined range, and change the switching frequency of the power converter within a second predetermined range.

Abstract: A power system includes at least one power unit, and each power unit has a direct current power source comprising at least two photovoltaic modules connected in series, each module having a positive and a negative output terminal, and a distributed inverter consisting of and an associated transistor switches connected to either the positive or negative output terminal of the at least two photovoltaic modules, and an alternating current power output. A power system has at least two power units, and each power unit has a direct current power source of at least one photovoltaic modules, and at least two transistor switches, wherein each power unit produces one polarity of voltage, used for generating alternating current power.

Abstract: An N-phase power converter has N phases with outputs connected in parallel and outputs connected in parallel. The converter comprises: N switch units, wherein each phase of the N-phase power converter comprises one of the N switch units; and an integrated inductor unit, comprising M inductor subunits, wherein M is a natural number greater than or equal to 2, each inductor subunit comprises i inductors, i is a natural number greater than or equal to 2, N>M×i or N=M×i, M×i of the inductors in the integrated inductor unit are respectively coupled to M×i of the N switch units, wherein: the i inductors of each of the inductor subunit are inverse-coupled to each other, the coupling coefficient between the M inductor subunits is less than the coupling coefficient between the i inductors in each of the inductor subunits.

Abstract: System and method are provided for regulating a power converter. The system includes a signal processing component configured to receive a first input signal and a second input signal, process information associated with the first input signal and the second input signal, and output a drive signal to a switch based on at least information associated with the first input signal and the second input signal. The first input signal is associated with at least a feedback signal related to an output voltage of the power converter. The second input signal is associated with at least a primary current flowing through a primary winding of the power converter. The signal processing component is further configured to change a peak value of the primary current within a first predetermined range, and change the switching frequency of the power converter within a second predetermined range.

Abstract: A power supply device comprises: a first switching circuit that includes a series circuit, connected between a predetermined voltage level and a ground level, having a high side switching element and a low side switching element connected in series that are alternately turned on and off at a predetermined frequency; a second switching circuit that includes a switching element controlled between on and off, the switching element having one end being connected to the ground level, and that makes an ON time point of the switching element variable; and a control unit that performs control such that ON time points of the switching element and the high side switching element are not overlapped with each other.

Abstract: A method and apparatus for controlling a fault blocking voltage source converter apparatus which is, in use, connected to an AC system and a DC system for power transmission, in the event of a DC side interruption operating the voltage source converter apparatus after identification of a need for a DC side interruption based on a voltage order, so as to extract at least some electrical energy stored in the connected DC system to the voltage source converter apparatus.

Abstract: A power conversion circuit includes a voltage regulator circuit and a detection circuit. The voltage regulator circuit includes a first switch and a second switch. A first end of the first switch receives an input voltage, and a control end of the first switch receives a first drive signal. The second switch is coupled between a second end of the first switch and the ground, and is turned on or off based on a second drive signal. The first switch and the second switch regulate the input voltage to output an output voltage. The detection circuit is configured to determine whether the first switch is short-circuited or not based on a voltage level of at least one of the first end, the second end, or the control end of the first switch, and adjust the second drive signal when the first switch is short-circuited, to turn on the second switch.

Abstract: A switching power supply includes: a transformer; a switching device, which is connected to a primary coil of the transformer; a switching controller; a voltage generation circuit, which rectifies and smooths an AC voltage induced in an auxiliary coil provided on the primary side of the transformer, and output the rectified and smoothed AC voltage as a first DC voltage; and an overvoltage protection circuit, wherein the auxiliary coil and the switching controller are connected via a capacitor, and the switching controller stops the switching control depending on a change in at least one of a current and a voltage between electrodes of the capacitor, the change being caused by a voltage rise of the AC voltage induced in the auxiliary coil.

Abstract: A phase shifting transformer for poly-phase alternating current includes source side terminals, load side terminals, an exciting unit, and a series unit. The exciting unit includes further coils that are magnetically coupled to primary coils and to the secondary coils of the exciting unit to provide further voltages. The further coils are connected in series between the source side terminals and the series unit, so that the voltages at the load terminals are combinations of the quadrature voltages and the further voltages with the source voltages, thus modifying the voltage phase displacement between the source side terminals and the load side terminals.

Abstract: System and method are provided for regulating a power converter. The system includes a signal processing component configured to receive a first input signal and a second input signal, process information associated with the first input signal and the second input signal, and output a drive signal to a switch based on at least information associated with the first input signal and the second input signal. The first input signal is associated with at least a feedback signal related to an output voltage of the power converter. The second input signal is associated with at least a primary current flowing through a primary winding of the power converter. The signal processing component is further configured to change a peak value of the primary current within a first predetermined range, and change the switching frequency of the power converter within a second predetermined range.

Abstract: A power converter is electrically connected with an AC power supply via a switch, and is configured with a plurality of unit converters (5) connected in series. A drive circuit (40, 42) drives a plurality of switching elements (11 to 14) of a main circuit (30). An interface circuit (48) outputs a detection value of a voltage sensor (46) to a control device (4). If a bypass switch (7) is turned off when the power converter is activated, each of the plurality of unit converters (5) charges a capacitor (15) using power supplied from the AC power supply. When the power converter is activated, a power supply (50) supplies a power supply voltage to the voltage sensor (46) and the interface circuit (48), prior to the drive circuit (40, 42). The control device (4) turns off the switch when the detection value of the voltage sensor (46) of at least one of the plurality of unit converters (5) is more than or equal to a predetermined value.

Abstract: A converter converting between a dc voltage at a first voltage level and at least one waveshape at a second higher voltage level has a primary connection port for the dc voltage, one secondary connection port for each waveshape, and one stack of cells for each secondary port. Each stack includes n cells connected in cascade between the primary port and the corresponding secondary port. At least (n?1) of the cells in a stack have: first, second, third, and fourth terminals, a first energy storage, and first, second, and third switches, where the first energy storage is connected in parallel with the first and second switches, the first terminal is provided at a junction between the first energy storage and the first switch, and the second terminal is provided at a junction between the first energy storage element, the second switch and the third switch.

Abstract: A multi-level power converter and a method using first, second, third and fourth switching elements, an inductor, and a flying capacitor are presented. A first terminal of the inductor may be connected to a switching terminal connecting the second and third switching elements. A first terminal of the flying capacitor may be connected to a terminal connecting the first and second elements. A second terminal of the flying capacitor may be connected to a terminal connecting the third and fourth switching elements. The multi-level power converter may have a first feedback circuit to generate control signals for setting the switching elements in a plurality of switching states for regulating an output voltage or an output current. The converter may have a second feedback circuit to generate control signals to allow the flying capacitor to be charged or discharged using an inductor current flowing through the inductor.