Abstract: A temporary power delivery system includes a power source, a booth stringer, and a portable GFCI device. The GFCI device is receives current from the power source by a first terminal and delivers current to the booth stringer by a second terminal. An electronic processor of the GFCI device compares a combined magnitude of current flowing through first and second phase conductors of the GFCI device to a magnitude of current flowing through a neutral conductor of the GFCI. The electronic processor also compares a first voltage between the first phase conductor and neutral conductor to a second voltage between the second phase conductor and neutral conductor. A circuit breaker of the GFCI device is opened if a difference between the combined magnitude of phase conductor current and neutral conductor current exceeds a first threshold or a difference between the first voltage and second voltage exceeds a second threshold.

Abstract: A power control device includes: an output voltage controller configured to control an output voltage based on a feedback voltage corresponding to the output voltage; and an overvoltage protector configured to continue or stop the operation of the output voltage controller based on a first detection result of whether the output voltage has exceeded an output voltage threshold value and a second detection result of whether the feedback voltage has fallen to or below a feedback voltage threshold value.

Abstract: An interleaved power converter includes a control circuit and multiple phase-shifted subconverters each having at least one power switch. The control circuit is coupled to the subconverters for controlling the power switches to balance currents in the subconverters over multiple periods. The control circuit includes a current compensator configured to determine a first duty cycle multiple times over the multiple periods, generate a PWM control signal having a present value of the first duty cycle for controlling the power switch of one of the subconverters during a period, determine a second duty cycle based on the present value of the first duty cycle and a previous value of the first duty cycle, and generate another PWM control signal having the second duty cycle for controlling the power switch of another one of the subconverters during the period. Other example power converters and control circuits are also disclosed.

Abstract: An alternating-current (AC) voltage regulator including an input, an isolated power supply, a control circuit, an amplifier, and an output. The input is configured to receive an input voltage. The isolated power supply is configured to receive the input voltage and output a direct-current (DC) signal isolated from the input voltage. The control circuit is configured to receive a portion of the input voltage, adjust the portion of the input voltage, and output the adjusted voltage. The amplifier is configured to receive the isolated DC signal, the adjusted voltage, and a feedback loop, and output a differential signal. The output is configured to add the differential signal to the input voltage resulting in a regulated voltage, and output the regulated voltage.

Abstract: A converter operable to convert an input voltage at an input node to an output voltage at an output node coupled to a load by switching on and off a transistor at a switching frequency, the converter comprising: an error amplifier circuit having a first input coupled to a reference voltage, a second input coupled to the output node through a resistive divider, a first output operable to output a control current and a second output operable to output a current equivalent to the control current; a peak current comparator circuit having a first input coupled to the second output of the error amplifier circuit, a second input and an output, the second input is coupled to the input node through an inductor; an off-time timer circuit having an input coupled to the first output of the error amplifier circuit and an output, the off-time timer circuit operable to set the switching frequency based on the control current; and a control circuit having a first input coupled to the output of the peak current comparator cir

Abstract: A converter module is provided with a first power delivery circuit, a second power delivery circuit, and a controller. The first power delivery circuit supplies current from a first direct current (DC) source to a resonant stage in a first direction. The first power delivery circuit comprises at least two first switches. The second power delivery circuit supplies the current from the first DC source to the resonant stage in a second direction, opposite the first direction. The controller includes memory, and a processor that is programmed to: enable the first power delivery circuit and the second power delivery circuit alternately to provide power as a periodic waveform to the resonant stage; and disable the at least two first switches individually in a sequence to generate a phase shift in the periodic waveform and to disable the first power delivery circuit.

Abstract: Systems and methods for using parasitic capacitance of a transformer as an element in a resonant converter are provided. Aspects include determining a parasitic capacitance associated with a transformer, determining a resonant circuit configuration based at least in part on the parasitic capacitance associated with the transformer, and providing a resonant converter comprising the resonant circuit and the transformer.

Abstract: During its first and second residence times, corresponding first and second currents flow between a charge pump and a circuit that connects to one of the charge pump's terminals. Based on a feedback measurement from the charge pump, a controller adjusts these first and second currents.

Abstract: A sample holder includes: a base body including a ceramic material; a support body including a metal material; a first joining layer which joins a lower face of the base body and an upper face of the support body together; a first through hole extending from a lower face of the support body through the first joining layer to the upper face of the base body, a part of the first through hole located within the base body being at least partly narrower than a part of the first through hole located within the support body and a part of the first through hole located within the first joining layer; and a porous member located inside the first through hole and joined to the lower face of the base body via a second joining layer.

Abstract: A power conversion device includes first and second current detectors. A coil is connected a first power terminal through the first and second current detectors. A first switch has a source terminal connected to the coil and a second semiconductor switch has a drain terminal connected to the coil. A first diode is connected between a drain terminal of the first semiconductor switch and a second power supply terminal. A second diode is connected between a source terminal of the second semiconductor switch and the second power terminal. A capacitor is connected in parallel with the first and second diodes. A control circuit is configured to turn the first and second semiconductor switches on or off based on current detections of the first and second current detectors.

Abstract: A power converter includes a first circuit including an inductor and configured to convert an input voltage into a first voltage, a second circuit including a transformer and configured to convert the first voltage input to the insulating transformer to a second voltage, a control circuit configured to control the first circuit, a first power supply circuit including a first winding magnetically coupled to the inductor and configured to output a third voltage generated by the first winding to the first control circuit, and a second power supply circuit including a second winding magnetically coupled to the transformer and configured to output a fourth voltage generated by the second winding to the first control circuit. When the second voltage is not output the third voltage is output to the control circuit, and when the second voltage is output the fourth voltage is output to the control circuit.

Abstract: An electric fan for producing thrust to propel an aircraft is disclosed. The electric fan comprises a stator, a fan rotor rotatably mounted relative to the stator and an electric motor mounted to the stator and drivingly engaged with the fan rotor to cause rotation of the fan rotor relative to the stator. The fan rotor comprises an annular body defining a flow passage therethrough and a plurality of fan blades disposed in the flow passage and mounted for common rotation with the annular body about a fan rotation axis. The electric motor has a motor rotation axis that differs from the fan rotation axis.

Abstract: A switched-mode power supply has a rectifier device, a switching unit which is arranged downstream of the rectifier device, a transmission device which is arranged downstream of the switching unit and a filter device. In order to reduce the sensitivity of the switched-mode power supply to high-energy interferences, it is proposed that the filter device contains a current-compensated choke coil which is connected to a voltage limiter circuit in such a way that in the case of interference signals applied to the choke coil, a damping of the interference signals takes place by way of the voltage limiter circuit.

Abstract: A voltage supply system and a power source that, in a voltage supply system in which a plurality of power sources (e.g., DC-DC converters) are connected in parallel, enable each power source to be set at a desired load ratio. The power source is used in a voltage supply system including a power source configured to output a voltage in a constant voltage mode on the basis of a first target voltage, and is connected in parallel to the constant voltage power source, the power source including a voltage generation unit configured to output a voltage switchably between a constant voltage mode based on a second target voltage greater than the first target voltage and a constant current mode based on a current limit value.

Abstract: Embodiments of the present disclosure generally relate to substrate support assemblies used in semiconductor device manufacturing. In one embodiment, a substrate support includes a ceramic body having at least one aperture formed therein defined by a sidewall. A plurality of recesses extend into the sidewall, a rod member is disposed in the at least one aperture, and an eyelet member is circumferentially disposed about the rod member. The eyelet member has a plurality of protrusions extending outwardly therefrom, each disposed in a corresponding recess of the plurality of recesses. A first portion of each protrusion is in contact with a sidewall of the respective recess of the ceramic body and a second portion of each protrusion is separated by a gap from the sidewall of the respective recess of the ceramic body. A first portion of a brazing material is disposed between an upper surface of the at least one aperture and an end of the rod member.

Abstract: A resonant converter and a manufacturing method of a transformer thereof are provided. The resonant converter includes a full bridge circuit, an element, a first branch circuit, a second branch circuit and a secondary winding. The full bridge circuit includes a first node and a second node. The element includes an inductor or a capacitor. The first branch circuit includes a first primary winding. The second branch circuit includes a second primary winding, and the first and second primary windings have the same turn number. The transformer is constructed by the first and second primary windings and the secondary winding. The first branch circuit, the element and the second branch circuit are sequentially coupled in series between the first and second nodes. The first branch circuit and the second branch circuit are symmetrically located with respect to the element. The first and second branch circuits have the same impedance.

Abstract: Provided is a rotor capable of improving the reliability of a connection between a lead conductor and a terminal member. A stator includes a winding wound around a stator core and having a lead conductor at an end thereof, and a terminal member having a connection portion to the lead conductor of the winding. The connection portion of the terminal member includes a winding-side connection portion that fixes the lead conductor, and a leading-end-side connection portion that fixes a portion closer to a leading end of the lead conductor than the winding-side connection portion.

Abstract: An apparatus for power conversion includes a switching network that controls interconnections between pump capacitors in a capacitor network that has a terminal coupled to a current source, and a charge-management subsystem. In operation, the switching network causes the capacitor network to execute charge-pump operating cycles during each of which the capacitor network adopts different configurations in response to different configurations of the switching network. At the start of a first charge-pump operating cycle, each pump capacitor assumes a corresponding initial state. The charge-management subsystem restores each pump capacitor to the initial state by the start of a second charge-pump operating cycle that follows the first charge-pump operating cycle.

Abstract: The present invention relates to an energy harvesting apparatus using triboelectrification. The energy harvesting apparatus of the present invention may include: a housing formed in an accommodation space in the energy harvesting apparatus; an electrification sheet accommodated to be rolled into the housing; an elastic body provided in the housing and providing elastic force so that the electrification sheet is rolled into the housing; and an electrode unit provided on the electrification sheet or on the periphery of the electrification sheet and electrificating the electrification sheet through friction while the electrification sheet is pulled or rolled.

Abstract: Methods and apparatus for preventing or reducing arcing of an electrostatic chuck in a process chamber. In some embodiments, a method of preventing or reducing arcing of an electrostatic chuck includes forming a first recess in at least a portion of a sidewall of the electrostatic chuck and filling the first recess with a conformable dielectric material that remains conformable (elastic) over a temperature range of at least approximately zero degrees Celsius to approximately 80 degrees Celsius. In some embodiments, the first recess is filled with the conformable dielectric material such that the conformable dielectric material does not bond to at least one surface of the first recess. The conformable dielectric material may also be used to fill a second recess in a dielectric sleeve adjacent to the electrostatic chuck.