Drive and Load System for a Rotating Electric Machine, Test Stand, and Electric Load and Drive Train

Abstract

The invention relates to a drive and load system for a rotating electric machine which has a controllable power source that can be connected to a power supply. The controllable power source is connected to an intermediate circuit that has a capacitor for temporarily storing power. The capacitor thus acts as an energy store in order to stabilise the intermediate circuit voltage. The drive and load system also has a motor inverter which is connected to the intermediate circuit and which converts the intermediate circuit voltage applied to the motor inverter input into a drive current for a rotating electric machine, or feeds a load current from the electric machine back into the intermediate circuit. A closed control loop of the drive and load system, the actual value input of which is connected to the motor inverter input, controls the motor inverter input voltage as an actual value to a setpoint USet in a closed-loop manner by means of the controllable power source. According to the invention, the drive and load system has a setpoint output device which is connected to the setpoint input of the closed control loop and sets its current setpoint USet (t). The setpoint output device is suitable for determining the setpoint USet (t) for the closed control loop by means of a predefined setpoint curve USet [n(t)] depending on the speed n(t) of the electric machine.

Dependencies are inferred from the claim text.