Patent ID: 6838845

Claim:
Circuit arrangement of an electromotor ( 1 ) comprising two terminals, in which one terminal of the electromotor ( 1 ) is connected with a first current branch ( 3 ) and one terminal of the electromotor ( 1 ) is connected with a second current branch ( 4 ), in which the first and the second current branch ( 3 , 4 ) respectively comprise a change-over switch ( 5 , 6 ), through which the first and the second current branch ( 3 , 4 ) are switched against a current source ( 7 ) or against a ground branch ( 2 ) corresponding to the desired rotational direction, for operating the electromotor ( 1 ), and with a first diode ( 8 ), which is circuit-connected in the blocking direction between the first current branch ( 3 ) and the ground branch ( 2 ), and a second diode ( 9 ), which is circuit-connected in the blocking direction between the second current branch ( 4 ) and the ground branch ( 2 ), and a switch ( 10 ), which, depending on the rotational direction of the resting electromotor ( 1 ) that is to be blocked, either can interrupt the first current branch ( 3 ) between the first change-over switch ( 5 ) and the connection of the first diode ( 8 ) on the first current branch ( 3 ), and by which one rotational direction of the electromotor ( 1 ) is blocked, or can interrupt the second current branch ( 4 ) between the second change-over switch ( 6 ) and the second diode ( 9 ) of the second current branch ( 4 ), and by which the other rotational direction of the electromotor ( 1 ) is blocked.