156results about "Apparatus with intermediate ac conversion" patented technology

The application provides a high-power low-voltage starting rectifying device, which comprises a three-phase input power distribution and filter unit, a three-phase 12-pulse rectifying unit, a DC / DC unit I, a DC / DC unit II and a control module; the three-phase input power distribution and filter unit is connected with the three-phase 12-pulse rectifying unit, the three-phase 12-pulse rectifying unit adopts a differential connection triangle autotransformer 12-pulse rectifying technology and is connected with the DC / DC unit I and the DC / DC unit II respectively; the DC / DC unit I adopts a three-channel staggered parallel phase-shift full-bridge technology, and the DC / DC unit II adopts a single-channel phase-shift full-bridge technology; the control module is connected with the DC / DC unit I and the DC / DC unit II respectively; the control module is used for controlling the DC / DC unit I and the DC / DC unit II to convert direct current voltage and supply a hovercraft gas turbine. The hovercraft gas turbine can be started.

Disclosed are a transformer, a power conversion device, and a medical device. The transformer includes a primary winding, a plurality of magnetic core assemblies, and a plurality of secondary windings. The primary winding is configured to pass through the plurality of magnetic core assemblies. The plurality of secondary windings are wound on the plurality of magnetic core assemblies, respectively. Each of the plurality of magnetic core assemblies has an air gap of the same size. And / or, the transformer includes a capacitor and an impedance element. The capacitor is connected in series with the impedance element. The series-connected capacitor and impedance element are connected to two ends of a corresponding secondary winding.

The invention provides a hybrid power system for a generator set. Current detection is arranged at a battery terminal of a step-down charge channel and a step-up discharge channel of a bidirectional module, and voltage detection is arranged at two terminals of a diode to detect whether the diode has a voltage drop to determine whether a battery is in a charge state or non-discharge state; and whether the battery is in a charge state is determined by the current detection. A generator set in a non-operating state can be aroused to charge the battery, and the charge / discharge state of the battery can be effectively monitored and controlled.

In the present invention, a first switching element, a second switching element, a first rectifying element, and a second rectifying element are each composed of an even number of surface-mounted power semiconductor elements. In a planar direction orthogonal to the lamination direction in a multilayer circuit board, the first switching element and the second switching element are mounted at positions symmetrical to the first rectifying element and the second rectifying element with respect to the configuration position of a dual resonance transformer. The first switching element, the second switching element, the first rectifying element, and the second rectifying element are arranged respectively at upper, lower, left, and right positions on a plane with respect to the configuration position of the dual resonance transformer. The first switching element, the second switching element, the first rectifying element, and the second rectifying element, which are each composed of the even number of power semiconductor elements, are: mounted on the top surface and the bottom surface of the multilayer circuit board; overlapped when viewed in the lamination direction; connected in parallel through via conductors for power semiconductor connection; and thermally coupled in the lamination direction. The ON periods of the first rectifying element and the second rectifying element are set to the ON periods of the first switching element and the second switching element, respectively. The first switching element, the second switching element, the first rectifying element, and the second rectifying element change the occurrence of power loss over time vertically and horizontally with respect to the configuration position of the dual resonance transformer in the planar direction, thereby evenly dispersing the heat generation and uniformizing and integrating the heat distribution.

The purpose of the present invention is to achieve high efficiency and high efficiency. In the present invention, a converter device (1) comprises a rectifier (2), a half bridge inverter (3), an input inductor (Lin), a transformer (Tr1), a full bridge inverter (4), an inductor (L1), and a control device (5). The transformer (Tr1) has a primary winding (N1) connected between a first output end (34) and a second output end (35) in the half bridge inverter (3). The full bridge inverter (4) is connected to a secondary winding (N2) of the transformer (Tr1). The inductor (L1) is connected between the half bridge inverter (3) and the primary winding (N1) or between the secondary winding (N2) and the full bridge inverter (4). The control device (5) controls the half bridge inverter (3) and the full bridge inverter (4).

This invention relates to the field of battery management and power electronic conversion technology for energy storage systems, and particularly to a resonant converter for a BMS (Battery Management System) in an energy storage system and its power flow control method. The converter includes a battery module, a data acquisition and protection unit, a main controller, and a power conversion unit. The data acquisition and protection unit is connected to the main controller, and the battery module is connected to the data acquisition and protection unit. The power conversion unit is connected to both the battery module and the main controller. The power conversion unit includes a high-voltage side LLC circuit, a transformer, and a low-voltage side synchronous rectification circuit. The high-voltage side LLC circuit and the low-voltage side synchronous rectification circuit are connected to the transformer, the high-voltage side LLC circuit is connected to the main controller, and the low-voltage side synchronous rectification circuit is connected to both the battery module and the main controller. The main controller monitors the battery module status in real time and dynamically adjusts the operating mode of the power conversion unit. Compared with existing technologies, this invention protects the battery while maintaining the operation of some system functions as much as possible, thus improving the overall system efficiency.

A power apparatus applied in a solid state transformer structure includes an AC-to-DC conversion unit, a first DC bus, and a plurality of bi-directional DC conversion units. First sides of the bi-directional DC conversion units are coupled to the first DC bus. Second sides of the bi-directional DC conversion units are configured to form at least one second DC bus, and the number of the at least one second DC bus is a bus number. The bi-directional DC conversion units receive a bus voltage of the first DC bus and convert the bus voltage into at least one DC voltage, or the bi-directional DC conversion units receive at least one external DC voltage and convert the at least one external DC voltage into the bus voltage.

To provide a blower device having an electrode part generating air flow, and variably controlling voltage applied to every electrode part, while suppressing an enlargement of a circuit and increase of consumption power, a control method and a program thereof.SOLUTION: A blower device 100 has a blower part 101 having a plurality of discharge electrodes generating air flow 411, 412, and 413 and a power reception electrode 431, a boosting part 201, a voltage multiplication part 202, a power supply part 102 generating voltage applied to the discharge electrodes, and a control part 103 controlling air quantity of the blower part 101. The control part variably controls the discharge electrodes generating air flow by controlling voltage applied to every discharge electrode part, and controls the air quantity of the blower part 101.SELECTED DRAWING: Figure 1

To suppress the generation of switching noise during the period in which a predetermined circuit processes a predetermined signal. [Solution] A power supply circuit comprising: a switching circuit that controls the switching so that the output voltage becomes a first voltage based on a feedback signal that changes according to the output voltage generated by the switching of a switching element, and stops the switching when the feedback signal changes to a first state where the output voltage is higher than the first voltage; and a control circuit that changes the feedback signal to the first state during a first period in which a predetermined circuit processes a predetermined signal.

A switching power supply apparatus includes: a pair of input terminals; a pair of output terminals; a transformer; an inverter circuit including first and second switching devices, first and second rectifying devices as voltage clamping devices, a resonant inductor, and a resonant capacitor; a rectifying and smoothing circuit; a current detector detecting whether a current is flowing through at least one of the first rectifying device or the second rectifying device; and a driver performing switching driving. The resonant capacitor is disposed between a second node and one of a pair of coupling lines. The driver performs switching driving to cause both the first and second switching devices to be set to an OFF state in a case where the current detector detects that a current is flowing through the at least one of the first rectifying device or the second rectifying device.

The utility model discloses a photovoltaic inverter and system for cadmium telluride glass power generation in a building integrated photovoltaics (BIPV), and relates to the technical field of cadmium telluride photovoltaic power generation, the photovoltaic inverter is electrically connected with unique cadmium telluride glass, and the photovoltaic inverter comprises a stabilizing circuit; a conversion circuit; and a control circuit. According to the utility model, each piece of cadmium telluride glass is provided with the photovoltaic inverter, and the photovoltaic inverter is utilized to carry out disturbance adjustment on the photoelectric conversion efficiency of the cadmium telluride glass according to the photoelectric conversion efficiency of the cadmium telluride glass by collecting the real-time working state of the cadmium telluride glass; the cadmium telluride glass can meet the maximum photoelectric conversion output of the cadmium telluride glass, then can meet the power generation requirement and the energy storage requirement of building photovoltaic integration, and effectively improves the photoelectric conversion efficiency of the cadmium telluride glass. The defect that a traditional high-power photovoltaic inverter cannot meet the power generation processing requirement of cadmium telluride glass in the prior art is effectively overcome.

To provide a power conversion device and a control method thereof that are capable of switching between voltage control and current control at any timing and that enable stable operation of the system even when power generation using natural energy changes suddenly.SOLUTION: A power conversion circuit 100 has three input / output ports, and switches between voltage control and current control using a first switching control that switches to current control using a control command value during voltage control, and a second switching control that switches to voltage control using a control command value during current control.SELECTED DRAWING: Figure 2

To reduce the number of parts. [Solution] The power converter 10 comprises a rectifier circuit 20 that rectifies the AC voltage input from the AC power supply PS, and a DAB converter 30. The DAB converter 30 comprises a primary full-bridge circuit 41 having a plurality of primary switching elements Q1 to Q4, a secondary full-bridge circuit 51 having a plurality of secondary switching elements Q5 to Q8, and a control unit 80. The rectifier circuit 20 rectifies the AC voltage input from the AC power supply PS without performing power factor correction operation, and therefore does not need to have a PFC coil for power factor correction operation, thus reducing the number of parts.

In the field of switching power supplies, the present invention provides a control method, circuit, and switching power supply that can improve the accuracy of control. [Solution] The resonant period signal of the switching power supply is detected in real time, and a delay time is superimposed on the resonant period signal. The control signal is then used to control the conduction of the primary power switching transistor of the switching power supply within a predetermined range near the target valley of the resonant waveform, based on the resonant period signal and the delay signal. The delay time is related to a first parameter and a second parameter, where the first parameter is a set value that changes with time within a certain range, and the second parameter is a function related to the resonant period of the switching power supply.

A current conversion device (1) comprises: a resonator (30) with a transformer (T) and a capacitor (Cr); a primary-side full bridge circuit (10) comprising a first switch (Q1), a second switch (Q2), a third switch (Q3) and a fourth switch (Q4); and a secondary-side full bridge circuit (20) comprising a fifth diode (D5), a sixth switch (Q6), a seventh diode (D7) and an eighth switch (Q8). The sixth switch (Q6) and the eighth switch (Q8) operate synchronously with control signals for the first switch (Q1), the second switch (Q2), the third switch (Q3) and the fourth switch (Q4) by applying control signals in a time interval that excludes a resonance period of the resonator (30) from a switching cycle of the first switch (Q1), the second switch (Q2), the third switch (Q3) and the fourth switch (Q4).

To provide a switching control device capable of providing good load regulation of an isolated type switching power supply.SOLUTION: A switching control device is configured to control a switching element (SW1) connected to a primary winding (L1) of a transformer (TR1). The switching control device includes: sample-hold circuits (S5, C7) configured to perform sample-hold of a feedback voltage resulting from an induction voltage generated in an auxiliary winding (L3) of the transformer; control parts (5 to 8) configured to control the switching element based on the output of the sample-hold circuits; and timing signal generation circuits (2 to 4, Q1 to Q11, C3 to C5, S1 to S4) configured to generate a timing signal according to the induction voltage. The sample-hold circuit is configured to sample the feedback voltage according to the timing signal.SELECTED DRAWING: Figure 1

The present application provides an integrated magnetic assembly and a manufacturing method thereof for a multi-module DC-DC converter. The integrated magnetic assembly includes N primary windings, N secondary windings and N magnetic cores, and N is an integer greater than 1. The N magnetic cores are sequentially arranged, and each magnetic core includes a plate, a first common magnetic core column, a second common magnetic core column, an inductor magnetic core column and a transformer magnetic core column. The first common magnetic core column and the second common magnetic core column are arranged on the first side and the second side of the plate respectively. The inductor magnetic core column is configured to be wound with corresponding primary windings or corresponding secondary windings, and the transformer magnetic core column is configured to be wound with corresponding primary and secondary windings which are interleaved with each other.

A resonant capacitor Crk (k is a natural number of one to n) of each circuit element has one end connected in series to a resonant reactor Lr and a primary winding N1 of a transformer T, and another end connected to the resonant capacitor Crk of another circuit element 10 so that a dimensional multiphase LLC converter having a phase difference of 360° / Pk is constructed by Pk (Pk is an optional natural number) of the circuit elements 10.

A power transmission circuit 1 connected to a circuit that boosts voltage from a low potential to a high potential performs power transmission in a first period, transmitting the high-voltage voltage generated by the low-voltage side control circuit 12 driving the low-voltage side inverter circuit 13 to the rectifier circuit 16 via the first transformer 14 and the second transformer 15. In a second period, separate from the first period, it performs first signal transmission, transmitting the first signal generated by the low-voltage side control circuit 12 driving the low-voltage side inverter circuit 13 to the high-voltage side control circuit 18 via the first transformer 14 and the second transformer 15.

A transformer capable of easily coping with various input voltage specifications and improving productivity is obtained. The transformer includes a core portion that forms a magnetic circuit; a primary winding and a secondary winding wound on the core portion; and a first connecting portion having a plurality of first conductive portions arranged with an insulating interval therebetween, one or both of the primary winding and the secondary winding is divided into a plurality, and each of the plurality of divided windings in the at least one divided winding has a winding portion wound on the core portion and two extension members extending from both ends of the winding portion, and the first connecting portion is connected to one of the two extension members of each of the plurality of divided windings in the at least one divided winding.

To provide a switching power supply device capable of realizing large power by parallelizing resonant circuits without increasing complementary gate drive signals.SOLUTION: In a circuit element 10a, resonant circuits are arranged in parallel. One end of a resonant capacitor Crkq of a q-th parallelized resonant circuit is connected in series to a resonant reactor Lrq and the primary winding N1q of a transformer Trq. The other end of the resonant capacitor Crkq of the q-th resonant circuit parallelized is connected to the resonant capacitor Crkq of the q-th parallelized resonant circuit in another circuit element 10a so as to configure the k-dimensional multi-phase LLC converter with a phase difference of 360° / Pk using the Pk circuit elements.SELECTED DRAWING: Figure 6

The present application provides a power supply device, a power supply unit, and a test device. The power supply device (100) includes a plurality of power supply units (200) connected in series. Each of the power supply units (200) includes an output stage (210) that generates an output voltage (Vi) corresponding to a control signal (Vctrl) between a positive output (OUTP) and a negative output (OUTN). A current detector (250) of a main channel generates a current detection signal (Is) representing an output current of the output stage (210). A feedback controller (240) generates the control signal (Vctrl) so that the current detection signal (Is) approaches a target value (Iref).

To provide a ferrite composition that can reduce changes in eddy current loss due to differences in core size or shape, an electronic component using the ferrite composition, and a power supply device using the electronic component. [Solution] A ferrite composition having a main component, a first minor component, and a second minor component, wherein the main component is composed of 51.0 to 53.5 mol% iron oxide, 7 to 16.5 mol% zinc oxide, and the remainder being manganese oxide, and per 100 parts by mass of the main component, the first minor component contains 0.09 to 0.27 parts by mass of cobalt and 0.13 to 0.45 parts by mass of titanium, and per 100 parts by mass of the main component, the second minor component contains y parts by mass of silicon, niobium, vanadium, and calcium, the average crystal grain size is x μm, y is 0.10 to 0.32, x is 6 to 18, and y and x satisfy formulas (1) and (2).

A power conversion device such that the number of parts is reduced, and a secondary side semiconductor element can be cooled using a simple configuration and at low cost, is provided. The power conversion device includes a multiple of semiconductor switching elements that convert a direct current voltage into an alternating current voltage, an isolation transformer that transmits the alternating current voltage from a primary side to a secondary side, and outputs the alternating current voltage, and a rectifying circuit including a multiple of diodes that rectify the output, wherein the multiple of semiconductor switching elements and the multiple of diodes are configured of a module wherein the multiple of semiconductor switching elements and the multiple of diodes are sealed in the same package.

To provide a resonance converter in which power can be increased or high integration can be achieved.SOLUTION: A resonance converter includes m lower conversion circuits 101-m constituting an LLC resonance converter that operates with a resonance inductor Lr in response to on-off operation of an upper switch element QH and a lower switch element QL. The resonance converter includes n upper conversion circuits 10m+1-m+n constituting an LLC resonance converter in which a primary winding T1 and a resonance capacitor Cr operate with the resonance inductor Lr in response to on-off operation of the upper switch element QH and the lower switch element QL. The resonance converter includes a control inductor Lpd (lower control inductor) that is connected in parallel with the primary winding T1 of the m lower conversion circuits 101-m, and a control inductor Lpu (upper control inductor) that is connected in parallel with the primary winding T1 of the n lower conversion circuits 101-m.SELECTED DRAWING: Figure 1

The present application provides a power supply device, a power supply unit, and a test device. A plurality of channel power supply units (200) each include an output stage (210) that generates an output voltage (V i ) between a positive output (OUTP) and a negative output (OUTN) in accordance with a control signal (Vctrl), and a voltage detector (220) that generates a voltage detection signal (Vs i ) that indicates the output voltage (V i ). A feedback signal generation section (230) of a master channel power supply unit (200_1) that is one of the plurality of channels receives voltage detection signals (Vs2 to Vs N ) from slave channel power supply units (200_2 to 200_N) that are remaining channels of the plurality of channels, and generates a feedback signal (Vfb) that is based on the voltage detection signals (Vs1 to Vs N ) of all channels. A feedback controller (240) generates the control signal (Vctrl) so that the feedback signal (Vfb) approaches a target value (Vref). The output stage (210) of the slave channel operates based on the control signal (Vctrl) generated in the master channel.