| 摘要 |
The invention relates to an electric circuit comprising an electrically activatable first relay (21) which connects a first connecting point (1) electrically to a second connecting point (2) in a non-activated state and connects the first connecting point (1) to a third connecting point (3) in an activated state, and a second electrically activatable relay (22) which connects a first connecting point (la) electrically to a second connecting point (2a) in a non-activated state and connects the first connecting point (la) to a third connecting point (3a) in an activated state, an inductive load being coupled directly or via additional coupled electric components between the two first connecting points (1) and (la) so that the inductive load is connected to a power supply in given positions of the relays (2, 3a; 3, 2a), said circuit being adapted to activate both relays (21, 22) when the voltage drop across the inductive load is to be interrupted or inverted. According to the invention, sparking in the contact assembly of the relay is avoided when the current to the motor is cut off. The service life of the relay is thereby increased significantly, as it is typically the wear caused by sparking which limits the service life of a relay. <IMAGE> |
