A semiconductor device includes high-side and low-side switching elements connected in series to form a switching arm, a high-side driver IC for driving the high-side switching element, and, on a chip separate from the high-side switching element, a low-side driver IC for driving the low-side switching element. The driver IC includes a first controller for monitoring a switching voltage appearing at the node where the high-side and low-side switching elements are connected together. When a first driving control signal fed in from outside the semiconductor device instructs to turn on the high-side switching element, the first controller determines whether or not to permit the high-side switching element to be turned on based on a result of checking the switching voltage.

A semiconductor device includes high-side and low-side switching elements connected in series to form a switching arm, a high-side driver IC for driving the high-side switching element, and, on a chip separate from the high-side switching element, a low-side driver IC for driving the low-side switching element. The driver IC includes a first controller for monitoring a switching voltage appearing at the node where the high-side and low-side switching elements are connected together. When a first driving control signal fed in from outside the semiconductor device instructs to turn on the high-side switching element, the first controller determines whether or not to permit the high-side switching element to be turned on based on a result of checking the switching voltage.

A submodule for a modular multilevel converter has nine semiconductor switches that can be switched off, four capacitors, six network nodes, and two terminals. The components are mounted such that different voltages are generated between the terminals of the submodule by controlling the semiconductor switches. This arrangement of components substantially improves the behavior of the converter and of the submodule in the event of a fault.

A submodule for a modular multilevel converter has nine semiconductor switches that can be switched off, four capacitors, six network nodes, and two terminals. The components are mounted such that different voltages are generated between the terminals of the submodule by controlling the semiconductor switches. This arrangement of components substantially improves the behavior of the converter and of the submodule in the event of a fault.

A method for controlling a power converter, which in particular has partial power converters connected in parallel, is provided. The method includes determining a nominal voltage for the power converter; and dividing an output voltage for the power converter into a number of, in particular equal, voltage ranges. The voltage ranges are limited by a discrete upper voltage limit and a discrete lower voltage limit and the voltage ranges can be adjusted by switching the power converter, in particular the partial power converters. The method includes allocating the nominal voltage a voltage range with a discrete upper and lower voltage limits; allocating a first switch setting to the lower voltage limit; allocating a second switch setting to the upper voltage limit; and switching between the first switch setting and the second switch setting so that the power converter generates an actual voltage corresponding to the nominal voltage.

A method for controlling a power converter, which in particular has partial power converters connected in parallel, is provided. The method includes determining a nominal voltage for the power converter; and dividing an output voltage for the power converter into a number of, in particular equal, voltage ranges. The voltage ranges are limited by a discrete upper voltage limit and a discrete lower voltage limit and the voltage ranges can be adjusted by switching the power converter, in particular the partial power converters. The method includes allocating the nominal voltage a voltage range with a discrete upper and lower voltage limits; allocating a first switch setting to the lower voltage limit; allocating a second switch setting to the upper voltage limit; and switching between the first switch setting and the second switch setting so that the power converter generates an actual voltage corresponding to the nominal voltage.

An apparatus includes a controller that monitors an error voltage indicating a difference between an output voltage and a setpoint voltage. Based on the monitored error voltage, the controller generates modulation adjustment signals including a frequency adjustment signal and an ON-time adjustment signal. The controller generates a pulse width modulation signal of a first power supply phase in accordance with both the frequency modulation adjustment signal and the ON-time adjustment signal.

The invention relates to an electronic module for an electric drive in a vehicle, comprising an input-side electrical connection for inputting an input current generated by an energy source; an intermediate circuit with a capacitor; a semiconductor bridge circuit, connected in parallel to the intermediate circuit, wherein the bridge circuit comprises a high-side switch, and a low-side switch connected in series to the high-side switch, wherein the high-side switch is connected to the input-side electrical connection via a first current path, wherein the low-side switch is connected to the input-side electrical connection via a second current path, wherein the first current path and the second current path are the same length; and an output-side electrical connection for outputting an output current generated by the bridge circuit from the input current.

The invention relates to an electronic module for an electric drive in a vehicle, comprising an input-side electrical connection for inputting an input current generated by an energy source; an intermediate circuit with a capacitor; a semiconductor bridge circuit, connected in parallel to the intermediate circuit, wherein the bridge circuit comprises a high-side switch, and a low-side switch connected in series to the high-side switch, wherein the high-side switch is connected to the input-side electrical connection via a first current path, wherein the low-side switch is connected to the input-side electrical connection via a second current path, wherein the first current path and the second current path are the same length; and an output-side electrical connection for outputting an output current generated by the bridge circuit from the input current.

An elevator monitoring device that can compensate for system voltage when an unbalanced short circuit occurs. A control device for a power conversion device includes: a current command value generator configured to generate a provisional normal phase d-axis current command value, a provisional normal phase q-axis current command value, a provisional reversed phase d-axis current command value, and a provisional reversed phase q-axis current command value to compensate for an alternating current (AC)-side voltage of a power converter; a limiter configured to respectively set limit values of a provisional normal phase d-axis current command value, a provisional normal phase q-axis current command value, a provisional reversed phase d-axis current command value, and a provisional reversed phase q-axis current command value so that the AC-side current value of the power converter does not exceed a preset value; and a controller configured to control the power converter within the limit values.