Abstract: A controller (2) and a method for a DC converter (1), wherein the DC converter (1) comprises an input (E), an output (A), a connection to ground (GND), and also at least two half-bridges with two switching elements each (TR1 . . . TR4) connected in series and an inductance (LI, L2) each connected with the point connecting the two switching elements. In accordance with the invention the controller (2) is equipped to measure the current (IL1, IL2) through the inductances (LI, L2), and controls the switching elements (TR2, TR4)/(TR1, TR2) positions on the ground side/input side always with negative/positive current through the inductance (LI, L2) into an off-state. Finally a DC converter (1) connected with the controller (2) is also specified.

Abstract: Electrical systems for balancing charging or loading of parallel-arrayed charge accumulators (1, 2), particularly batteries, storage batteries, etc. The systems include circuitry used to supply voltage to a load (7) or to electrically charge the accumulators (1, 2), or both, via connections (3a, 3b, 4a, 4b) at the charge accumulator side and interface connections at the load or charger side. An electrical circuit (10) has at least one DC converter (11) that converts the differential voltage between the matching polarity connections (3a, 4a) at the charge accumulator side, or converts a voltage derived from this differential voltage. Voltage supply devices for loads, or charging devices for charge accumulators, may include circuits of this type.

Abstract: A terminal (3a . . . 3h) for the electrical connection of a plurality of electrochemical cells (2) of an accumulator, which terminal comprises a U-shaped outer rail (4a . . . 4f) and an actuating element (5a . . . 5g), is described. According to the invention, the actuating element (5a . . . 5g) is coupled to a clamping element (6a . . . 6f . . . 6h) in such a way that the clamping element (6a . . . 6f . . . 6h) is pressed against at least one limb (4a? . . . 4f?) of the outer rail (4a . . . 4f) on actuation of the actuating element (5a . . . 5g).

Abstract: Laminated rotor (21) assemblies for rotating electric machines such as hybrid synchronous motors (HSM) of vehicle drives, the rotor plates (26) of which have one or several recesses (29) as a flux barrier or magnet pocket, which comprise radially innermost and outermost edge sections as rounded transition regions from and to edge sections lying therebetween. Each of the rounded transition regions may be shaped at least approximately respectively according to a part of a curve (35) of second order. Between adjacent recesses (29), a respective oblique cross-piece (52) is provided, the center line (54) of which lies obliquely to the pole axis (30).

Abstract: A control device for a separately excited rotor winding (LR) of a synchronous machine is described, which comprises a voltage source (2) connected to the rotor winding (LR) and intended for transmitting electrical energy (E) from a power supply (4) to the rotor winding (LR), in such a way that said rotor winding is caused to rotate by a rotating field on the stator side. According to the invention, the control device furthermore comprises a consumer (3) connected to the rotor winding (LR) and intended for transmitting electrical energy (E) from the rotor winding (LR) to the power supply (4). Furthermore, a method for controlling a separately excited rotor winding (LR) of a synchronous machine is described.

Abstract: A permanent magnet excited synchronous machine (1) with embedded magnets, which is particularly suitable for range extender generator. It includes stator (2) and rotor (3) being provided with exciter magnets (7). The rotor (3) has at least two rotor poles (4), each is provided with one exciter magnet (7). In order to increase the magnetic torque limit of the synchronous machine (1)—in each rotor pole (4) at least one, preferably several selective magnetic flux barriers, preferably as substantially radial slots (8) being parallel with the main pole flux is/are provided in the area of the pole shoe.

Abstract: A current-energized synchronous motor (1) suitable in particular for vehicle drives. It includes a stator (2) and a rotor (3) carrying the energizer winding (7). The rotor (3) has at least two rotor poles (4) with one energizer winding (7) each. The rotor includes at least one selective magnetic flux barrier, in particular in the form of a radial slot (8) along the main axis (4A) of the rotor pole (4). This flux barrier is provided in each rotor pole (4) for increasing the reluctance moment of the current-energized synchronous motor (1).

Abstract: The zero-voltage converter is able to perform at extremely high power levels and bares significant benefits to all levels; system, inverter and circuitry level. Power losses are avoided by using a new developed resonant topology. EMI problems are reduced by power module integrated capacitors as well as smart selection of the terminal technology and under full utilization of the analog components and their potentials. The power module developed for this specific application is designed under a maxim of gaining highest power density as well as lowest stray inductances. High switching frequencies enable even special electro motors with extremely low leakage inductance to perform well. This is in particular beneficial for ultra high speed drives or motors with a high pole pair number. The mechanical concept of the inverter can specifically be adopted to the referring vehicle and to its available installation space. Thus, also (hybrid) electrical vehicles can be designed based on such highly innovative conception.

Abstract: A circuit arrangement (1) for power distribution in a motor vehicle is described, which comprises a transformer (T1, T1a . . . T1n) having at least three transformer windings (W1, W1a . . . W1n, W2, W2a . . . W2n, W3, W3a . . . W3n). A first and second onboard supply inside the vehicle and a power supply which is outside the vehicle can be connected to the circuit arrangement (1), which supplies are coupled via the transformer windings (W1, W1a . . . W1n, W2, W2a . . . W2n, W3, W3a . . . W3n) and converters (UR1, UR2, UR2a . . . UR2n, UR3, UR3a . . . UR3n). The third converter (UR3, UR3a . . . UR3n) can be connected via a first change-over switch (US1, US1?) alternatively to the first on-board supply inside the vehicle or to the power supply outside the vehicle. A plurality of first converters (UR 1) and/or a plurality of second converters (UR2, UR2a . . . UR2n) and/or a plurality of third converters (UR3, UR3a . . . UR3n) each being connected to the transformer windings (W1, W1a . . . W1n, W2, W2a . . .

Abstract: A Converter (1a.1c) for single-phase and three-phase Operation which comprises a three-phase rectifier to which three coils (La, Lb, Lc) are connected on the mains side is described. A first coil (La) is provided on the mains side with a switch (S) which connects the first coil (La) to the mains during three-phase Operation and connects it via a capacitor (C) either to the lower end (FP) of the rectifier or on the mains side to another coil (Lb, Lc) during single-phase Operation. In addition, a d.c. voltage supply and a battery charger (5a.5c) which comprise the Converter (1a.1c) according to the invention are described.

Abstract: A DC/DC converter (1) having a plurality n of two-pole inverters (2a, 2b) connected in parallel or in series, n transformers (Ta, Tb) and n two-pole rectifiers (3a, 3b) connected in parallel or in series is described. One inverter (2a, 2b) each and one rectifier (3a, 3b) each are connected to a transformer (Ta, Tb). The inverters (2a, 2b, 2a?, 2b?) are in turn connected to a control which is provided for frequency-synchronous actuation of the inverters (2a, 2b, 2a?, 2b?) with a 180°/n phase shift. According to the invention, leakage inductances (LS1, LS2) of the transformers (Ta, Tb, Ta?, Tb?), together with capacitors (C1, C2) of the inverters (2a, 2b , 2a?, 2b?) and/or capacitors (C3, C4) of the rectifiers (3a, 3b, 3a?, 3b?), form in each case a resonating circuit whose resonant frequency is substantially twice as great as a clock frequency of the control signal.

Abstract: Cooling systems (1) suitable for cooling an electronic unit (2) or assembly. The cooling system is provided with a cooling channel (6). An electronic unit (2) rests over a heat-conducting cooler wall (7). A coolant guide apparatus (11) is provided in the cooling channel (6) and has insert conduit elements (13) for guiding the coolant onto the cooler wall indentations (12). The end of each insert conduit (13) opening to the cooling channel (6) may be provided with an inclined entry surface (19) and an inlet opening (20) towards the inner longitudinal channel (14). A plurality of such coolant guides (11) may be arranged in series so that, for example, the same cooling medium flows through a plurality of semiconductor modules in succession.

Abstract: The invention relates to a current-energized synchronous motor (1) which is suitable in particular for vehicle drives. It consists of a stator (2) and a rotor (3) carrying the energizer winding (7), the rotor (3) having at least two rotor poles (4) with one energizer winding (7) each. The essential feature of the invention is that at least one selective magnetic flux barrier, in particular in the form of a radial slot (8) along the main axis (4A) of the rotor pole (4), is provided in each rotor pole (4) for increasing the reluctance moment of the current-energized synchronous motor (1).

Abstract: The zero-voltage converter is able to perform at extremely high power levels and bares significant benefits to all levels; system, inverter and circuitry level. Power losses are avoided by using a new developed resonant topology. EMI problems are reduced by power module integrated capacitors as well as smart selection of the terminal technology and under full utilization of the analog components and their potentials. The power module developed for this specific application is designed under a maxim of gaining highest power density as well as lowest stray inductances. High switching frequencies enable even special electro motors with extremely low leakage inductance to perform well. This is in particular beneficial for ultra high speed drives or motors with a high pole pair number. The mechanical concept of the inverter can specifically be adopted to the referring vehicle and to its available installation space. Thus, also (hybrid) electrical vehicles can be designed based on such highly innovative conception.

Abstract: A DC/DC converter (1) having a plurality n of two-pole inverters (2a, 2b) connected in parallel or in series, n transformers (Ta, Tb) and n two-pole rectifiers (3a, 3b) connected in parallel or in series is described. One inverter (2a, 2b) each and one rectifier (3a, 3b) each are connected to a transformer (Ta, Tb). The inverters (2a, 2b, 2a?, 2b?) are in turn connected to a control which is provided for frequency-synchronous actuation of the inverters (2a, 2b, 2a?, 2b?) with a 180°/n phase shift. According to the invention, leakage inductances (LS1, LS2) of the transformers (Ta, Tb, Ta?, Tb?), together with capacitors (C1, C2) of the inverters (2a, 2b , 2a?, 2b?) and/or capacitors (C3, C4) of the rectifiers (3a, 3b, 3a?, 3b?), form in each case a resonating circuit whose resonant frequency is substantially twice as great as a clock frequency of the control signal.

Abstract: Cooling systems (1) suitable for cooling an electronic unit (2) or assembly. The cooling system is provided with a cooling channel (6). An electronic unit (2) rests over a heat-conducting cooler wall (7). A coolant guide apparatus (11) is provided in the cooling channel (6) and has insert conduit elements (13) for guiding the coolant onto the cooler wall indentations (12). The end of each insert conduit (13) opening to the cooling channel (6) may be provided with an inclined entry surface (19) and an inlet opening (20) towards the inner longitudinal channel (14). A plurality of such coolant guides (11) may be arranged in series so that, for example, the same cooling medium flows through a plurality of semiconductor modules in succession.