550results about "Apparatus with intermediate ac conversion" patented technology

The invention relates to the technical field of electric energy conversion, and discloses a high-frequency resonant topology-driven isolation power conversion system, which comprises a power conversion circuit, a driving unit, a feature sensing unit and a logic regulation and control unit, and is characterized in that the logic regulation and control unit extracts a parasitic ringing extreme point of a voltage evolution waveform in dead time; a charge release balance point is determined by calculating an arithmetic mean value of the first wave crest and the first wave trough, and high-frequency parasitic parameter interference is stripped; and predicting a time domain window of a return-to-zero potential based on a charge release balance point, performing phase compensation on a driving pulse in the time domain window according to a voltage waveform second derivative feature, and locking the starting moment of a switching tube at a zero voltage point. Interference of high-frequency distribution electromagnetic parameters on conduction judgment is eliminated, and soft switching self-healing in a full-load domain is achieved.

The invention discloses a multi-mode electric energy conversion system and a method thereof, and relates to the technical field of power electronic conversion, the system comprises a signal acquisition module, a mode discrimination module, a soft switching control module and a switching execution module, the signal acquisition module acquires an input voltage, an output voltage, a load current and a switching tube temperature signal; the mode judgment module determines a target working mode according to an input voltage interval and a load rate interval, dynamic switching among a full-bridge phase shift mode, a half-bridge mode and an interleaving parallel mode is achieved, the soft switching control module generates a soft switching time sequence signal, a main power switch tube is enabled to achieve zero-voltage switching, and the main power switch tube is enabled to achieve zero-voltage switching. The switching execution module adopts a current ramp control strategy to execute mode switching, the switching time is less than 5ms, the voltage fluctuation is less than 3%, and the global efficiency is greater than 95% and the peak efficiency is greater than 98% under the conditions of wide voltage and wide load.

A power supply circuit generates from the input voltage of a primary circuit system the output voltage of a secondary circuit system by driving a switching output stage. The power supply circuit includes: a pulse feedback signal generation circuit that generates a pulse feedback signal corresponding to the output voltage; an analog control signal generation circuit that generates an analog control signal corresponding to the pulse feedback signal; and a switching driving control circuit that drives the switching output stage according to the result of comparison of the analog control signal with a slope signal. The analog control signal generation circuit raises the maximum value (an internal supply voltage) of the analog control signal with a predetermined gradient during the start-up or renewed start-up of the output voltage.

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.

A distributed SST-based power dispensing network, comprising a main cell system including a main cell and a main cell controller, the main cell having main cell converter circuitry including a primary bridge of a dual active bridge (DAB), the main cell controller configured to control the primary bridge and configured to activate main cell forward mode control circuitry or main cell reverse mode control circuitry perform based on a direction of power flow; and a power dispensing system including a power dispenser and a power dispenser controller, the power dispenser having power dispenser converter circuitry including a secondary bridge of the DAB, the power dispenser controller configured to control the secondary bridge and configured to activate power dispenser forward mode control circuitry or power dispenser reverse mode control circuitry based on the direction of power flow.

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.

A power distribution system comprises a plurality of energy storage modules coupled in series. A plurality of electrically isolated power converters are each coupled across one or more of the energy storage modules. When enabled, the power converters provide a low voltage output to an output of the power distribution system. A control system controls the power converters to provide the low voltage output. The control system selectively enables the power converters to balance states of charge of the energy storage modules.

A power supply system (10) includes a plurality of main batteries (31, 61) connected in parallel to a power supply bus (11, 12), and at least a single conversion circuit (40) that converts power input from the main batteries to a primary-side terminal pair (41, 42) and outputs the converted power from a secondary-side terminal pair (47, 48). A positive electrode and a negative electrode of the main battery are respectively connected to the primary-side terminal pair of the conversion circuit. The secondary-side terminal pair of the conversion circuit are connectable in series to the main battery. The secondary-side terminal pair of the conversion circuit are connectable in parallel to a low-voltage load (22).

Provided is a current resonance type switching power supply device with a simple configuration that has a wide variable range of output voltage and can also achieve ZVS of the main switching element. 【Solution means】The switching power supply device 38 includes a ZVS auxiliary circuit 40 formed by a series circuit of an auxiliary diode 42, an auxiliary inductor 44, and an auxiliary DC power supply 46, which is connected in parallel across both ends of the main switching element 14(2). The switching control circuit 36 determines first and second on-times ton1 and ton2 based on the control voltage Vs of the output by the error amplification circuit 34, and provides a dead time Td to turn on and off the main switching elements 14(1) and 14(2) complementarily. When the first on-time ton1 is ton1 ≧ Tk, control of the first operation mode is performed to set the second on-time ton2 to ton2 = ton1. When the first on-time ton1 becomes ton1 < Tk, control of the second operation mode is performed to set the second on-time ton2 to ton2 > ton1.

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.

An IC is coupled to a power stage having a first half bridge with first and second transistors and a second half bridge with third and fourth transistors. A controller (110) has a first control output for providing first to fourth control signals to the first to fourth transistors. The controller asserts the first to fourth control signals to implement a state sequence. The state sequence includes a first state in which the first and fourth transistors are on, a second state in which the first and third transistors are on, a third state in which the second and fourth transistors are on, and a fourth state in which the second and third transistors are on. During each switching cycle, the controller implements the first and fourth states, and one of the second or third states is implemented between the first and fourth states, alternating between implementing the second or third state every n switching cycles.

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).

To provide a magnetic element which is available as a non-contact connector while suppressing a size or cost by reducing the number of components.SOLUTION: A magnetic element 100 comprises: a first magnetic component 102 including two or more coils 12 (12a, 12b); and a second magnetic component 104 which is paired with the first magnetic component 102 and separated from the first magnetic component 102. Two magnetic flux paths are switched by inverting magnetic flux generated from at least one of the coils 12 (12a, 12b), thereby switching between a non-contact connector mode in which the first magnetic component 102 and the second magnetic component 104 are magnetically coupled and operated as a non-contact connector which performs power transmission with no electrical contact in one magnetic flux path and a single body mode in which the first magnetic component 102 is operated as a single body in the other magnetic flux path.SELECTED DRAWING: Figure 1

A power supply device with high output stability includes a voltage divider circuit, a full bridge rectifier, a resonant capacitor, a first transformer, a second transformer, a first switch element, a second switch element, a third switch element, an output stage circuit, and a detection and control circuit. The first switch element selectively couples the second transformer to the first transformer. The second switch element selectively couples the output stage circuit to the first transformer. The third switch element selectively couples the output stage circuit to the second transformer. The detection and control circuit appropriately controls the first switch element, the second switch element, and the third switch element according to a divided voltage from the voltage divider circuit and a capacitive voltage from the resonant capacitor.

According to this power conversion device (900), a heat dissipation unit (60) is positioned between a first coil component (701) and a second coil component (702). A housing (10) is thermally connected to the heat dissipation unit (60). The first coil component (701) has a first core (21) and a second core (22). The second coil component (702) has a third core (23) and a fourth core (24). The heat dissipation unit (60) has: a first heat dissipation portion (611) positioned between the first core (21) and the second core (22) and facing a first printed circuit board (31); and a second heat dissipation portion (612) positioned between the third core (23) and the fourth core (24) and facing a second printed circuit board (32).

The application provides an LLC resonant converter control circuit and method. The control circuit comprises a main control loop, an LLC resonant converter, and a compensation control loop. The main control loop comprises an output current loop, an output voltage loop and a resonant current loop. The output results of the output current loop and the output voltage loop are input into the resonant current loop. The output signals of the LLC resonant converter are fed back to the output current loop, the output voltage loop and the resonant current loop of the main control loop. The input end of the compensation control loop is connected with the LLC resonant converter, and is used for receiving the output signals of the LLC resonant converter and feeding back to the main control loop. The application can not affect the gain of a high frequency band, greatly improve the gain of a low frequency band, and effectively reduce the low frequency ripple of an output end.

The present disclosure relates to a dual-active-bridge converter and a power supply apparatus. The dual-active-bridge converter comprises multiple phases of transformers that are arranged and assembled in sequence, wherein a primary winding and a secondary winding in each phase of transformer are respectively wound on two winding post magnetic cores, the two winding post magnetic cores are positioned opposite each other, the two winding post magnetic cores are connected by means of two non-winding-post magnetic cores, and every two adjacent phases of transformers share a single non-winding-post magnetic core.

The switching control device according to one embodiment of the present invention is applied to a switching power supply device and is provided with a control circuit for controlling each of the switching operations of a plurality of switching elements included in at least either an inverter circuit or a rectifying / smoothing circuit. The control circuit sets, on the basis of the detection result of the current flowing through the capacitance component between the gate and drain of a first switching element in an OFF-state among the plurality of switching elements, a timing at which the first switching element switches from the OFF-state to an ON-state after a second switching element among the plurality of switching elements switches from the ON-state to the OFF-state and makes the transition to a delay time.

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.

The present invention aims to facilitate the work of fixing a heat sink block in a stationary power conversion device. The installed power conversion device (10) includes a heat sink block (60) including a cylindrical main body (61) with a heat dissipation section on the inside, and a housing (24) on the inside of which the heat sink block (60) is provided. The heat sink block (60) is fixed to the housing (24) in a hooked state.

A system includes a converter that distributes electric energy from an energy source to a load. The converter includes a dual active bridge. The system includes interfaces coupled to the converter. The system also includes a controller system that includes the interfaces and a controller. The controller system includes processors that perform determining of modulation control attributes based on characteristics of the converter, the modulation control attributes including one or more modulation control parameters and one or more modulation control modes corresponding to one or more phase shift techniques, obtaining operational condition information within the converter, the operational condition information corresponding to a component within the converter or an output of the converter, iteratively adjusting the modulation control attributes based on the operational condition information and controlling the converter based on the iteratively adjusted modulation control attributes.

The present invention is a control system (28) for a hybrid-powered active multi-bridge converter (10) comprising: - an input current port (20) comprising an H-switch bridge (30) of which a switch (T1) is controlled by a first law having a first duty cycle, - at least one output voltage port (22, 24) comprising an H-switch bridge (38, 40) of which a switch (T21, T31) is controlled by a second law out of phase with respect to the first law, the control system (28) regulating the converter (10) to a setpoint comprising a setpoint current value for the current of the current port (20) and a setpoint voltage value for a voltage port (22, 24).

This invention provides an isolated power supply unit that reduces the number of parts, thereby enabling miniaturization of the device and lowering costs. [Solution] An isolated power supply device comprising a transformer equipped with an auxiliary winding and a power supply control semiconductor device that generates on / off control signals for a switching element connected to the primary winding, comprising a first rectifier and smoothing circuit that rectifies and smooths the voltage induced at one terminal of the auxiliary winding and a second rectifier and smoothing circuit that rectifies and smooths the voltage induced at the center tap of the auxiliary winding, wherein the power supply control semiconductor device comprises first and second external power terminals to which the voltages generated by the first and second rectifier and smoothing circuits are input, a linear regulator that steps down the input voltage of the first external power terminal, and an internal circuit that generates on / off control signals for the switching element, wherein the internal circuit is operated by the voltage of the second external power terminal when the voltage of the second external power terminal is high, and by the voltage of the linear regulator when the voltage of the second external power terminal is low.

The invention provides a partial power DC-DC converter with controllable topology comprising: a galvanically isolated DC-DC converter having a positive input, a negative input, a positive output, and a negative output; a first DC voltage input electrically connected to said negative output of the DC-DC converter; an input reference; a first DC voltage output electrically connected to said positive output of the DC-DC converter; and an output reference electrically connected to said input reference and said negative input of the DC-DC converter; wherein said partial power DC-DC converter additionally comprises: a first switch arranged to selectively connect said first DC voltage input to said positive input of the DC-DC converter; and a second switch arranged to selectively connect said positive output of the DC-DC converter to said positive input of the DC-DC converter.

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

This application provides an output control circuit, a flyback converter, a chip, and an electronic device. The output control circuit can obtain a first output voltage from a first output circuit and a second output voltage from a second output circuit, and control the first and second output circuits to conduct sequentially based on the first and second output voltages in each switching cycle. Therefore, the output control circuit can determine a first freewheeling circuit and a second freewheeling circuit in the first and second output circuits, so that the magnetizing inductance of the transformer in the flyback converter transfers energy to the first and second freewheeling circuits respectively during the secondary freewheeling phase. That is, the magnetizing inductance transfers energy using high-frequency chopping in each switching cycle, making the high-frequency chopping frequency of the first and second output circuits equal to the switching frequency. Since the switching frequency is usually higher than the range of human hearing, the problem of audio noise can be solved, and the performance of the flyback converter can be improved.

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.