16 results about "Full bridge converter" patented technology

Full bridge converter-circuit having a H-bridge, comprising a control circuit for operating the H-bridge in a first operation mode or a second operation mode, wherein the control circuit is configured that between switching from the first operation mode to the second operation mode a morphing operation mode is applied in which a positive inverter voltage pulse length on a first half-bridge of the H-bridge is determined on the basis of a negative inverter voltage pulse length on a second half-bridge of the H-bridge.

The present invention relates to a system for powering a plurality of electrodes (31, 500, 600) of an electrical weeding device (100, 200, 400), comprising: a power input (20); a shared switching arm (23) connected to the power input (20); a plurality of power cells (5) connected to the shared switching arm (23), each of the plurality of power cells (5) comprising: an inverter switching arm (10), wherein the inverter switching arm (10) forms with the shared switching arm (23) a Full Bridge converter; a gate driver (16) connected to the inverter switching arm (10), wherein the gate driver (16) is configured to drive its inverter switching arm (10) upon receiving an activation signal; and a transformer (11), wherein each inverter switching arm (10) is connected to the shared switching arm (23) in a parallel configuration and to a primary side of the transformer (11), and the secondary side of each transformer (11) is connected in a series configuration to a full-wave rectifier bridge (12), the full-wave rectifier bridge (12) is connected to a LC filter (13) and the LC filter (13) is further connected to the plurality of electrodes (31, 500, 600); a control unit (30) configured to determine an output power level of the plurality of power cells (5) based on a weed pressure in a weeding area, and wherein the control unit (30) is further configured to send the activation signal to each gate driver (16) of the plurality of power cells (5) to adjust the phase shift between the inverter switching arms (10) and the shared switching arm (23), wherein the phase shift defines the output voltage to be applied in the plurality of electrodes (31, 500, 600) by means of the Full Bridge converter. The present invention is also related to a method for powering a plurality of electrodes (31, 500, 600) of an electrical weeding device (100, 200, 400), the electrical weeding device (100, 200, 400) and a vehicle (120) carrying the electrical weeding device (100, 200, 400).

A universal power flow controller, UPFC, for a high-power AC system having a multi-phase power supply line for providing power from a utility supply to a load, the multi-phase power supply line having at least a first to third phase, the UPFC comprising: a parallel coupling system configured to be connected to the power supply line in parallel for transmitting an input electric power between the parallel coupling system and the power supply line; a series coupling system comprising at least one first full-bridge, FB, converter configured to be connected in series to the first phase for transmitting a first output electric power between the at least one first FB converter and the first phase, at least one second FB converter configured to be connected in series to the second phase for transmitting a second output electric power between the at least one second FB converter and the second phase, and at least one third FB converter configured to be connected in series to the third phase for transmitting a third output electric power between the at least one third FB converter and the third phase; and an interconnection system comprising at least one first solid state transformer, SST, connecting the parallel coupling system to the at least one first FB converter, at least one second SST connecting the parallel coupling system to the at least one second FB converter, and at least one third SST connecting the parallel coupling system to the at least one third FB converter.

Disclosed is a converting circuit for an on-board charging device. The converting circuit for the on-board charging device includes a first resonant converter; a second resonant converter; a phase shift full-bridge converter; and a controller.

Reconfigurable power converter topologies that may switch between non-isolated Buck-Boost converter and isolated Dual-Active Bridge (DAB) converter or full-bridge converter. The switching may provide for reconfiguring the power converter inputs and outputs to series or parallel connections in accordance with design needs. The implementations of the disclosure may be utilized for electrified transportation renewable energy storage and power grid support.

This invention discloses a pulse density modulation full-bridge converter capable of eliminating inter-frequency harmonics, belonging to the field of power electronic control technology. The pulse density modulator provided by this invention includes an adder for adding a pulse density command signal and a feedback signal to obtain a signal to be quantized, x. A quantizer quantizes the signal to be quantized, x, to obtain a pulse signal, a. A register delays pulse signal a by half a switching cycle to generate a pulse signal, b. Pulse signals a and b are input into an XOR gate and then subtracted from the signal to be quantized, x, to obtain a quantization error, e. The quantization error, e, is then filtered by a digital filter to obtain a feedback signal. Pulse signals a and b control the switching state of the full-bridge converter. This invention can be applied to various resonant converters, controlling the converter's output voltage or power through pulse density modulation; it can eliminate inter-frequency harmonics based on the resonant network, avoiding oscillation and ensuring stable converter operation.

A method for operating a bidirectional DC-DC converter is presented. The method involves precharging two high-voltage capacitors so that the voltage across each capacitor is balanced. Each capacitor is connected to an input of one of the two cascaded, phase-shifted full-bridge converters of the DC-DC converter. Precharging is performed by a controller connected to the DC-DC converter closing a first static bypass switch and a second static bypass switch, and simultaneously operating the full-bridge converters by executing a switching sequence. The bidirectional DC-DC converter comprises a primary and a secondary side connected by at least one transformer.The DC-DC converter comprises two cascaded phase-shifted full-bridge converters on the primary side, each of which is connected to a respective transformer, each of which is connected to a full-bridge converter on the secondary side.

A phase shift full bridge (PSFB) converter includes: a transformer having primary and secondary sides; a first pair of switch devices connected in series at a first node coupled to a first terminal of the primary side; a second pair of switch devices connected in series at a second node coupled to a second terminal of the primary side; diode devices connected in series at a third node coupled to the first terminal; an inductor coupled between the first and third nodes; a secondary-side rectifier; and a controller. In one mode, the controller operates the second pair of switch devices as a leading power transfer leg and the first pair of switch devices as a lagging power transfer leg. In another mode, the controller operates the first pair of switch devices as the leading power transfer leg and the second pair of switch devices as the lagging power transfer leg.

A multiple-port bidirectional converter is provided. The multiple-port bidirectional converter includes a transformer, a primary full-bridge converter, a first high voltage (HV) power converting unit, a second HV power converting unit, a first low voltage (LV) power converting unit, a second LV power converting unit, a full-bridge diode rectifier, and a full-bridge inverter. The transformer includes a core, one primary winding and five secondary windings. The primary full-bridge converter is coupled to the first primary winding and receives an input voltage. The first / second HV power converting unit, coupled to the first / second secondary winding, outputs a first / second high DC voltage to a first / second HV battery. The first / second LV power converting unit, coupled to the third / fourth secondary winding, outputs a first / second low DC voltage to a first / second LV battery. The full-bridge diode rectifier is coupled to the fifth secondary winding and the full-bridge diode rectifier to output an AC output voltage.

A power conversion device includes a power converter including an arm circuit having a plurality of converter cells connected in cascade. Each of the converter cells includes a bridge circuit including a plurality of semiconductor switching elements, and a power storage element connected to a first input / output terminal on a high potential side and a second input / output terminal on a low potential side through the bridge circuit. One or more of the converter cells are full-bridge converter cells. Among four arms that constitute the bridge circuit of the full-bridge converter cell, an arm between a high potential-side node of the power storage element and the second input / output terminal, or an arm between a low potential-side node of the power storage element and the first input / output terminal includes a resistor element connected in series with the semiconductor switching element.

The application provides a maximum power point tracking and synchronization method for an LCC wireless power transmission system based on a disturbance observation method, which is low in communication speed requirement, convenient in structure, good in reliability and low in cost. In the application, the input of a pulse width modulation generation module at a vehicle end is a phase shift angle beta s and a system phase angle theta, and the pulse width modulation generation module generates corresponding PWM driving signals according to the two quantities, and the signals are used for operating a phase shift full bridge converter at the vehicle end; an output voltage Vds at the vehicle end is transmitted to a ground end of the wireless power transmission system through wireless communication, and the output voltage Vds and a resonance current ILrp of a compensation network enter a double-loop PI controller, and finally a ground end phase shift angle beta p is calculated and output to the pulse width modulation generation module at the ground end; the pulse width modulation generation module at the ground end generates corresponding PWM driving signals according to the ground end phase shift angle beta p, and the PWM driving signals are used for operating a phase shift full bridge converter at the ground end. The application can be applied to the field of power electronics.

The invention provides a method for accelerating load flow calculation of an alternating-current and direct-current hybrid power distribution network through partial control parameter and state variable decomposition, and relates to the technical field of direct-current hybrid power distribution networks. Comprising the following steps: respectively establishing a voltage source converter power flow model under space pulse width vector modulation and a dual-active full-bridge converter steady-state model under extended phase shift modulation; constructing a load flow calculation model of the multi-voltage-level alternating-current and direct-current hybrid power distribution network; and constructing a KKT condition function and a voltage source converter state variable and control parameter solving equation, and performing AC / DC hybrid power distribution network load flow calculation according to the KKT condition function and the voltage source converter state variable and control parameter solving equation to obtain a calculation result. The method can effectively cope with the problem that the load flow convergence speed is slow and even is not convergent when the load flow is solved by the unified iteration method due to the addition of the DAB control variable, and effectively accelerates the load flow convergence speed.

Converter circuitry for a wireless power system is disclosed. The converter circuitry includes first and second switch legs each comprising two switches, wherein each switch is configured to transition between an on state and an off state. A controller is configured to control the states of the switches by alternating between a first switch sequence and a second switch sequence, wherein the controller successively alternates between the first switch sequence and the second switch sequence during a conversion period. The first switch sequence defines a first pattern of on states of the first, second, third, and fourth switches of the first and second legs, and the second switch sequence defines a second pattern of on states of the first, second, third, and fourth switches, wherein the second pattern is different than the first pattern.

A control system (15) for controlling a full bridge converter to compensate the reactive power consumed by an inductive position sensor for a rotor of an electrical machine supported by at least one active magnetic bearing is proposed. The inductive position sensor is supplied by an alternating current source. The control system (15) includes a phase shift determining means (26) to determine a phase shift (SP) between a supply voltage (VS) and a supply current (IS) delivered by the source. A first control loop (22) controls the amplitude (Ac) of a control signal (SC) from the phase shift (SP). A second control loop (23) controls the phase of the control signal (SC). A third control loop (24) controls a voltage reference (VR). A controlling means (25) controls a full bridge converter according to the control signal (SC).