Abstract: A DC-DC converter system (1, 1?) according to the invention is provided with an input (In) for feeding in an input voltage (U_in), a step-up controller section (2) for increasing the input voltage (U_in) in a controlled manner to a controlled first output voltage (U_out1) and for providing the first output voltage (U_out1) at a first supply output (Out1), and a voltage conversion section (3) for converting the input voltage (U_in) into a second output voltage (U_out2) in a manner controlled by a control device of the step-up controller section (2) and for providing the second output voltage (U_out2) at a second supply output (Out2). The DC-DC converter system (1) according to the invention having two supply outputs (Out1, Out2) is based on an expansion of a step-up controller with a SEPIC circuit, wherein the DC-DC converter system comprises only a single control device (S1) and a switching device (T1) which can be controlled by the control device.

Abstract: The invention relates to a method for operating an electric circuit arrangement (1) which has a low-voltage sub-network (2) and a high-voltage sub-network (3). A test signal is transmitted from one of the sub-networks (2, 3) to the other sub-network (3, 2) in order to detect a fault depending on the reception of the signal in the other sub-network (3, 2) and to switch the circuit arrangement (1) to a safe state. A data bus (5), which connects a low-voltage control unit (6) of the low-voltage sub-network (2) to a high-voltage control unit (7) of the high-voltage sub-network (3), is operated with a maximum bus load at least temporarily as a test signal so that data packets are transmitted at fixed time intervals, and a fault is detected depending on a delay of the last received data packet, said delay being detected by the control unit (7, 6) receiving the data packets.

Abstract: The invention relates to a device and to a method for determining a voltage. The voltage to be determined is a direct voltage at the input of a flyback converter. The flyback converter comprises at least a flyback-converter transformer and a switching element on the primary side of the flyback-converter transformer. In order to determine the voltage at the input of the flyback converter, a voltage on the secondary side of the flyback-converter transformer is sensed and evaluated in correlation with the switching state of the switching element on the primary side.

Abstract: The invention relates to a circuit arrangement (1), in particular for controlling an electric machine, comprising at least one high-voltage semiconductor bridge circuit (2) that includes a low-side semiconductor switch (4) and a high-side semiconductor switch (3). A high-side gate driver (5) is assigned to the high-side semiconductor switch (3), and a low-side gate driver (6) is assigned to the low-side semiconductor switch (4). According to the invention, a high-side flyback converter (8) is connected upstream of the high-side gate driver, and a low-side flyback converter (9) is connected upstream of the low-side gate driver (6), at least one of the flyback converters (7, 8, 9) being designed as a high-voltage flyback converter.

Abstract: A DC-DC converter system (1, 1?) according to the invention is provided with an input (In) for feeding in an input voltage (U_in), a step-up controller section (2) for increasing the input voltage (U_in) in a controlled manner to a controlled first output voltage (U_out1) and for providing the first output voltage (U_out1) at a first supply output (Out1), and a voltage conversion section (3) for converting the input voltage (U_in) into a second output voltage (U_out2) in a manner controlled by a control device of the step-up controller section (2) and for providing the second output voltage (U_out2) at a second supply output (Out2). The DC-DC converter system (1) according to the invention having two supply outputs (Out1, Out2) is based on an expansion of a step-up controller with a SEPIC circuit, wherein the DC-DC converter system comprises only a single control device (S1) and a switching device (T1) which can be controlled by the control device.

Abstract: The invention relates to a method (100) and a control device (SG) for operating power semiconductor switches (LH1 . . . LHn) connected in parallel, having the following steps: determining a nominal value for a total gate series resistor (GGVL . . . GGVn) of at least one power semiconductor switch (LH1 . . . LHn); providing the total gate series resistor (GGV1 . . . GGVn) for the at least one power semiconductor switch (LH1 . . . LHn) depending on the relevant nominal value, and operating the at least one power semiconductor switch (LH1 . . . LHn) with the associated total gate series resistor (GGV1 . . . GGVn).

Abstract: A circuit arrangement (1) for operating an electric machine. The circuit arrangement (1) includes at least one high-voltage half-bridge circuit (2), which has a high-side semiconductor switch (3) and a low-side semiconductor switch (4). In each case one gate driver (5, 6) is assigned to the semiconductor switches (3, 4) for actuating said semiconductor switches, and includes a low-voltage controller (7), which actuates the gate drivers (5, 6). A high-voltage controller (11) senses output signals (AS) of the gate drivers (5, 6) and transmits at least the sensed output signals (AS) to the low-voltage controller (7) using a data bus (12).

Abstract: The invention relates to a method for operating an electric circuit arrangement (1) which has a low-voltage sub-network (2) and a high-voltage sub-network (3). A test signal is transmitted from one of the sub-networks (2, 3) to the other sub-network (3, 2) in order to detect a fault depending on the reception of the signal in the other sub-network (3, 2) and to switch the circuit arrangement (1) to a safe state. A data bus (5), which connects a low-voltage control unit (6) of the low-voltage sub-network (2) to a high-voltage control unit (7) of the high-voltage sub-network (3), is operated with a maximum bus load at least temporarily as a test signal so that data packets are transmitted at fixed time intervals, and a fault is detected depending on a delay of the last received data packet, said delay being detected by the control unit (7, 6) receiving the data packets.

Abstract: The invention relates to a device and to a method for determining a voltage. The voltage to be determined is a direct voltage at the input of a flyback converter. The flyback converter comprises at least a flyback-converter transformer and a switching element on the primary side of the flyback-converter transformer. In order to determine the voltage at the input of the flyback converter, a voltage on the secondary side of the flyback-converter transformer is sensed and evaluated in correlation with the switching state of the switching element on the primary side.

Abstract: The invention relates to a circuit arrangement (1), in particular for controlling an electric machine, comprising at least one high-voltage semiconductor bridge circuit (2) that includes a low-side semiconductor switch (4) and a high-side semiconductor switch (3). A high-side gate driver (5) is assigned to the high-side semiconductor switch (3), and a low-side gate driver (6) is assigned to the low-side semiconductor switch (4). According to the invention, a high-side flyback converter (8) is connected upstream of the high-side gate driver, and a low-side flyback converter (9) is connected upstream of the low-side gate driver (6), at least one of the flyback converters (7, 8, 9) being designed as a high-voltage flyback converter.

Abstract: A system, comprising a control regulation system, an inverter, a DC link capacitor, which is coupled to input connections of the inverter, at least one control apparatus, which is coupled to semiconductor switches of a half-bridge of the inverter, wherein the control apparatus is configured to actuate the semiconductor switch on the basis of a control signal from the control regulation system, at least one temperature sensor, which is configured to determine a change in temperature of the semiconductor switches in the half-bridge of the inverter, and a voltage sensor, which is configured to determine the voltage at the DC link capacitor is disclosed.

Abstract: A system, comprising a control regulation system, an inverter, a DC link capacitor, which is coupled to input connections of the inverter, at least one control apparatus, which is coupled to semiconductor switches of a half-bridge of the inverter, wherein the control apparatus is configured to actuate the semiconductor switch on the basis of a control signal from the control regulation system, at least one temperature sensor, which is configured to determine a change in temperature of the semiconductor switches in the half-bridge of the inverter, and a voltage sensor, which is configured to determine the voltage at the DC link capacitor is disclosed.

Abstract: A circuit arrangement (1) for operating an electric machine. The circuit arrangement (1) includes at least one high-voltage half-bridge circuit (2), which has a high-side semiconductor switch (3) and a low-side semiconductor switch (4). In each case one gate driver (5, 6) is assigned to the semiconductor switches (3, 4) for actuating said semiconductor switches, and includes a low-voltage controller (7), which actuates the gate drivers (5, 6). A high-voltage controller (11) senses output signals (AS) of the gate drivers (5, 6) and transmits at least the sensed output signals (AS) to the low-voltage controller (7) using a data bus (12).