Det International Holding Limited

Delta Electronics (Thailand) Public Company Limited

Universitaet Paderborn

Frank Schafmeister

Philipp Rehlaender

Joachim Böcker

Tobias Grote

Heiko Figge

Roland Unruh

Michael Hufnagel

Peter Ide

Rongyuan Li

Daniel Spesser

Peter Wallmeier

Dirk Herke

Hugues Njiende T

Robert Pohlmann

Joachim Boecker

Linna Lv

Bastian Korthauer

Jörg Richter

Barzin Pour

Hugues Douglas Njiende T

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.

On-the-fly topology morphing for frequency-multiplier half-bridge operation

The disclosure concerns a full-bridge converter () that is capable to provide different operation and transition modes that lead to reduced losses and stressing of the components of the full-bridge converter (). This is achieved by a clamping circuit and applying specific switching patterns to the transistors (S, S, S, S) of a full bridge of the full-bridge converter ().

Isolated full-bridge converter

An apparatus for charging a (fully) electric battery vehicle with a direct current, having a rectifier connected to a multiphase power supply system, having an intermediate circuit which is arranged on the charging side of the rectifier and is coupled to the latter and has a number of capacitances and a centre point, having a DC/DC converter which is arranged on the charging side of the intermediate circuit and is coupled to the latter and is intended to adapt an intermediate circuit voltage of the intermediate circuit to a charging voltage of a battery of the battery vehicle, wherein the centre point of the intermediate circuit is connected to a neutral conductor of the multiphase power supply system.

Apparatus and method for charging an electric battery vehicle

In order to balance the thermal stress of the switches (S-S) of the two legs of an inverter full bridge (), the driving signals are generated using an up-down counter having a modulation period Tof twice the period T of the input voltage (Vin). The up-down counter has a first compare value () of D/4 and a second compare value () of (2+D)/4, where D is the duty cycle and where the second half bridge is phase shifted by the period T.

Alternating asymmetrical phase-shift modulation

A power converter-circuit () having a transformer (T), comprising a snubber-circuit (C, D, S, D) for suppressing voltage peaks on a secondary side of the transformer (T) that comprises a snubber capacitor (C); and an auxiliary DC-DC converter () having a first input connected with the snubber capacitor (C) and a first output connected with a first output (V) of the power converter-circuit (). This circuit increases efficiency of electrical conversion and reduces thermal losses.

Active-clamp forward converter with regenerative snubber

An interleaved LLC converter arrangement includes two or more LLC converters for transferring power from an input side to an output side, wherein the two or more LLC converters include a first LLC converter and a second LLC converter connected in parallel on the input side and on the output side and wherein each LLC converter includes a bridge inverter at the input side. For balancing the power transfer among the LLC converters if for example the second LLC converter transfers more power from the input side to the output side than the first LLC converter, each leg of the bridge of the bridge inverter of the first LLC converter is operated with a duty cycle of 0.5 and at least one leg of the bridge of the bridge inverter of the second LLC converter is operated with a duty cycle different from 0.5.

Power balancing in interleaved LLC converters via duty cycle variation

According to the invention, a current measurement circuit for providing a measurement signal for a controller for controlling a switching of power switches of a power converter comprises a first current sensing circuit for sensing a first bidirectional current representative of a current through a first power switch of the power converter. The first current sensing circuit is being adapted to provide a first sensing signal indicative of the first bidirectional current. The current measurement circuit further comprises a second current sensing circuit for sensing a second bidirectional current representative of a current through a second power switch of the power converter. The second current sensing circuit is adapted to provide a second sensing signal indicative of the second bidirectional current.

Current measurement circuit

The present application relates to a controller arrangement for controlling an inverter for converting an input power from a power source to a multiphase AC output power provided at a power output of the inverter. The power output is connected to a load and additionally to a power grid. The controller arrangement includes a signal input for receiving a power signal per phase representative of at least one of the power per phase provided to the load or the power per phase provided to the power grid. The controller arrangement is further adapted to control each phase of the multiphase AC output power individually according to the corresponding power signal. The invention further relates to an inverter comprising such a controller arrangement, a power distribution arrangement comprising such an inverter and a controller arrangement to control the inverter and the invention further relates to a method for controlling such an inverter.

Controller for an inverter

A converter arrangement with at least two single LLC converters, a pulse generator per single LLC converter wherein each pulse generator is configured to supply switching pulses to one single LLC converter and an output controller configured to use switching frequency control and/or phase-shift control to control the pulse generators comprises a load balancing control for overcoming unbalanced loading of the converter arrangement.

LLC balancing

A boost PFC converter includes a rectifier, a converter and an output stage comprising an output capacitor where the DC output voltage is provided across the output capacitor. The rectifier includes four rectifying elements connected in a full bridge configuration where the upper two of these four rectifying elements are thyristors and where the lower two are diodes. In that the thyristors are controlled such as to be open for only a part of each half period of the input voltage, the amount of current per half period that is passed to the output capacitor is controllable and can be made very small. Accordingly, the charge current for precharging the output capacitor can be controllably limited such that a bulky precharge resistor is not required anymore to avoid high inrush currents.

Resistorless precharging

In an integrated magnetic component for a switched mode power converter, comprising two magnetic cores forming an 8-shaped core structure and at least two first electric winding wires, wherein at least one magnetic core is an E-core, at least one of the first electric winding wires is wound on a flange of the E-core.

Integrated magnetics for soft switching converter

A power supply unit () that is to be connected to different types of power supply networks includes an input () to receive AC power from the power supply network and an output () for providing power to an electrical device. The electrical device may for example be a computer, a telecom infrastructure device, inductive cooking/heating systems or an on-board charger of an electrical automotive vehicle. The power supply unit () includes at least two converters () that are connected between the inputs () and the output () and it further includes a controllable switching arrangement (). The switching arrangement () includes a number of controllable switches () to controllably connect the converters () in different configurations to the input () and therefore also controllably to different supply lines of the power supply network.

Adaptable input phase switching

A converter arrangement (C., C., C., C., C., C.) with at least two single LLC converters (L), a pulse generator () per single LLC converter (L) wherein each pulse generator () is configured to supply switching pulses to one single LLC converter (L) and an output controller () configured to use switching frequency control and/or phase-shift control to control the pulse generators () comprises a load balancing control () for overcoming unbalanced loading of the converter arrangement (C., C., C., C., C., C.).

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Warburg, Germany

Frank Schafmeister