Test arrangement for testing a power electronics controller, and power electronics module for such a test arrangement

1. A test arrangement for testing a power electronics controller, wherein the power electronics controller has supply connections for supplying energy and load connections for controlling an electrical load, the test arrangement comprising:

a plurality of power electronics modules, wherein each power electronics module comprises:

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 having 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;

wherein the test arrangement is configured to simulate an environment of the power electronics controller for testing the power electronics controller, wherein simulating the environment of the power electronics controller comprises both the supply connections of the power electronics controller and the load connections of the power electronics controller each being respectively connected to at least one respective load connection of a power electronics module and at least one respective electrical connection variable being provided at the supply connections of the power electronics controller and the load connections of the power electronics controller;

wherein the supply connections of the power electronics modules are connected to one another via an electrical intermediate network;

wherein the supply connections of the power electronics modules are AC supply connections;

wherein the electrical intermediate network is an AC intermediate network;

wherein the supply circuits of the power electronics modules are multi-phase circuits for providing a plurality of phase voltages on a plurality of phase conductors; and

wherein the selection circuits of the power electronics modules connect phase conductors to the load connections of the power electronics modules.

2. The test arrangement according to claim 1 , wherein the AC intermediate network is connectable to an external AC network.

3. The test arrangement according to claim 1 , wherein the AC intermediate network is three-phase.

4. The test arrangement according to claim 1 , wherein the power electronics modules each have a galvanic isolation between the supply connections of the power electronics module and the at least one load connection of the power electronics module.

5. The test arrangement according to claim 4 , wherein the galvanic isolation is realized by a transformer.

6. The test arrangement according to claim 5 , wherein the transformer is three-phase on the supply side and at least three-phase on the load side.

7. The test arrangement according to claim 6 , wherein the transformer is realized as a 3-to-6-phase transformer, wherein the supply side is realized with three coils connected in a delta connection, and wherein the load side is realized with six coils in a star connection.

8. The test arrangement according to claim 1 , wherein the circuit breakers of the selection circuit comprise bidirectionally blockable power semiconductors.

9. The test arrangement according to claim 1 , wherein the power electronics controller is a motor controller for an electric motor, and wherein the at least one respective electrical connection variable provided at the supply connections of the power electronics controller and the load connections of the power electronics controller are based on a battery model and a motor model.