Abstract: A system for testing an inverter and/or a converter includes: a first emulation device configured to emulate a power generator; a second emulation device configured to emulate a power consumer; and a control device. The first emulation device comprises at least one first current-optimized load module. The second emulation device comprises at least one parallel circuit composed of a second dynamics-optimized load module and a second current-optimized load module. The first current-optimized load module and the second current-optimized load module each comprise an at least two-stage inverter. The second dynamics-optimized load module comprises an at least three-stage inverter. The control device is configured to: control the second current-optimized load module based on a low-pass-filtered output voltage of the inverter and/or the converter; and control the second dynamics-optimized load module based on a high-pass-filtered output voltage of the inverter and/or the converter.

Abstract: A test arrangement for testing a power electronics controller, wherein the controller has supply connections and load connections. A plurality of power electronics modules each have supply connections, at least one load connection, and an interface for controlling the power electronics module. In an operational state of the test arrangement, the supply connections of the controller are each connected to the load connection of a supply-side power electronics module and the load connections of the controller are each connected to the load connection of a load-side power electronics module. Thus, a rapid supply-side current regulation can be realized in a simple way in that the control device calculates at least the determined actual currents at the load connections of the supply-side power electronics modules from determined electrical connection variables of the load connections of the load-side power electronics modules for use for the feedforward control.

Abstract: A test arrangement for testing a power electronics controller. An intermediate network current in the electrical intermediate network is reduced in that the intermediate network current flowing in the intermediate network is determined by the controller and the controller changes at least one control value of at least one of the load-side power electronics modules in such a way that the intermediate network current is reduced when the interface of the load-side power electronics module is applied with the modified control value.

Abstract: A power electronics module for a test arrangement for testing a power electronics controller includes: supply connections for supplying energy; at least one load connection for providing at least one electrical connection variable; a supply circuit for providing electrical control voltages; a selection circuit with circuit breakers for switching one of the electrical control voltages onto the at least one load connection of the power electronics module; and an interface for controlling the circuit breakers. The supply connections of the power electronics module are AC supply connections. The supply circuit is a multi-phase circuit for providing a plurality of phase voltages on a plurality of phase conductors. The selection circuit connects a phase conductor to the at least one load connection of the power electronics module.

Abstract: A test arrangement for testing a power electronics controller, wherein the controller has supply connections and load connections. A plurality of power electronics modules each have supply connections, at least one load connection, and an interface for controlling the power electronics module. In an operational state of the test arrangement, the supply connections of the controller are each connected to the load connection of a supply-side power electronics module and the load connections of the controller are each connected to the load connection of a load-side power electronics module. Thus, a rapid supply-side current regulation can be realized in a simple way in that the control device calculates at least the determined actual currents at the load connections of the supply-side power electronics modules from determined electrical connection variables of the load connections of the load-side power electronics modules for use for the feedforward control.

Abstract: A test arrangement for emulating the phase currents of an electric motor for testing a power electronics controller. The controller is set up to drive the electric motor and is connectable to the test arrangement. The test arrangement includes an inductance emulator which simulates the electric motor as an electrical load for the controller by means of a power electronics circuit, and includes a test device that is set up to switch the inductance emulator to a different operating mode depending on an analysis of an output voltage at an output of the controller. A method is also provided for emulating the phase currents of an electric motor by means of a test arrangement for testing a controller.

Abstract: A test arrangement for emulating phase currents of an electric motor for testing a power electronic control unit. The control unit drives the electric motor and can be connected to the test arrangement. An inductance emulator simulates the electric motor as an electrical load for the control unit via a power electronic circuit, the inductance emulator acting as a current source. A test device influences the phase current of the inductance emulator as a function of an analysis of an output voltage of the control unit. The test device performs the analysis such that the output voltage of the control unit is compared with multiple, preferably three, voltage ranges, and a respective range for a control variable of the phase current is specified depending on the voltage range in which the output voltage of the control unit is located, which control variable is a control voltage of the inductance emulator.

Abstract: A test arrangement for testing a power electronics controller. An intermediate network current in the electrical intermediate network is reduced in that the intermediate network current flowing in the intermediate network is determined by the controller and the controller changes at least one control value of at least one of the load-side power electronics modules in such a way that the intermediate network current is reduced when the interface of the load-side power electronics module is applied with the modified control value.

Abstract: A power electronics module for a test arrangement for testing a power electronics controller includes: supply connections for supplying energy; at least one load connection for providing at least one electrical connection variable; a supply circuit for providing electrical control voltages; a selection circuit with circuit breakers for switching one of the electrical control voltages onto the at least one load connection of the power electronics module; and an interface for controlling the circuit breakers. The supply connections of the power electronics module are AC supply connections. The supply circuit is a multi-phase circuit for providing a plurality of phase voltages on a plurality of phase conductors. The selection circuit connects a phase conductor to the at least one load connection of the power electronics module.