ARRANGEMENT FOR SUPPLYING A USER, ESPECIALLY A D.C. MOTOR, THAT CONSUMES POWER IN A NON-CONTINUOUS MANNER FROM A D.C. SYSTEM

摘要

The invention concerns an arrangement for powering a load (12) that has non-continuous power consumption from a DC power supply (UB). The arrangement has a DC link circuit (14, 22) to which said load (12) can be connected and with which is associated a capacitor (21) that is suitable for briefly supplying energy to the load. A current regulator (24, 30) is provided for connecting the DC link circuit (14, 22) to the DC power supply (UB) in order to deliver a substantially constant current (i) to said capacitor (21) and to a load (12) connected to the link circuit. The target value of said current regulator (30) is adjusted adaptively, by means of a second regulator (34), to the instantaneous power demand of the load (12). An arrangement of this kind can also be referred to as an active filter that is particularly suitable for electronically commutated motors and for motors with a PWM current controller. The arrangement has an electronic fuse (240) which switches off the current regulator (30) when it responds and automatically switches the current regulator (30) back on after a defined time has elapsed, and repeats these switch-on attempts several times if applicable.