Circuit arrangement for operating a solenoid actuator

A method of operating a solenoid actuator, comprising:

• connecting the actuator in a circuit arrangement including an electrical energy supply device, a first switching device via which the actuator is connectable to the electrical energy supply device, an energy feed-back device located between the energy supply device and the actuator which feeds back an energy quantity stored in the actuator into the energy supply device when the first switching device has been opened, the energy supply device including at least one energy output device and at least one energy storage for transmitting and receiving energy, and a second switching device via which the energy storage is connectable to the energy feed-back device;
• and
• alternating opening and closing the first and the second switching devices such that a desired energy is accumulated step by step in the energy storage,
• wherein the energy output device includes a main energy output device and an auxiliary energy output device parallel to the main energy output device, and wherein the step by step accumulation of the desired energy in the energy storage is carried out in the event of defect or failure of the main energy output device.

A method of operating a solenoid actuator, comprising:

• connecting the actuator to an electrical energy source;
• disconnecting the actuator from the electrical energy source and feeding back an energy quantity stored in the actuator into an energy storage;
• and
• alternating repeating said steps of connecting and disconnecting, whereby a desired energy reserve is accumulated step by step in the energy storage, wherein the electrical energy source includes at least one energy output device and an auxiliary energy output device parallel to the main energy output device, and wherein the step by step accumulation of the desired energy reserve in the energy storage is carried out in the event of defect or failure of the main energy output device.