Method for controlling the current intensity of the electric current flowing through an inductive consumer and a corresponding circuit configuration

A circuit configuration, comprising:

• a control unit for controlling a current intensity of an electric current flowing through an inductive consumer;
• a switching device;
• a current measuring unit;
• a first controller;
• a second controller;
• and
• a freewheeling element, wherein:
• the consumer is connected in series to the switching device and the current measuring unit, and in parallel to the freewheeling element,
• the control unit activates the switching device for adjusting the current intensity during a pulse width modulation period,
• the control unit determines a mean load voltage to be set during the pulse width modulation period from an input current intensity with the aid of the first controller,
• the mean load voltage is set during the pulse width modulation period with the aid of the switching device at the consumer,
• one of the mean load voltage and a setpoint load voltage is determined with the aid of the second controller from a predefined setpoint current intensity being fed to a model adapted to the consumer,
• the input current intensity is ascertained from a difference between the predefined setpoint current intensity and a difference variable between an actual current intensity through the consumer and a model current intensity determined with the aid of the model,
• the setpoint current intensity is determined from a target current intensity and a superposition current intensity;
• and
• the superposition current intensity is determined from a superposition target current intensity with the aid of an inverted transfer function of a control loop made up of the first controller and the consumer.