Patent ID: 9515586
Filing Date: 2016-12-06
CPC Classification: B60L,G01R,H02H,H02P,H03K

Claim Text:
1. A power output stage ( 1 ), comprising at least one control unit ( 8 ) and comprising at least four semiconductor switches (HS 1 , HS 2 , LS 1 , LS 2 ) which can be individually actuated by the control unit ( 8 ) and which are connected to at least two half-bridges ( 4 , 5 ) for operating an electrical machine ( 2 ) in order to form a bridge circuit ( 3 ), and are connected to a supply line ( 6 ) and an earth line ( 7 ) of the power output stage ( 1 ), characterized in that the control unit ( 8 ) has a controllable first pull-up apparatus (PU 1 ) and a controllable first pull-down apparatus (PD 1 ) for a first of the half-bridges ( 4 ) and a controllable second pull-up apparatus (PU 2 ) and a controllable second pull-down apparatus (PD 2 ) for a second of the half-bridges ( 5 ), the control unit ( 8 ) actuating the semiconductor switches (HS 1 , HS 2 , LS 1 , LS 2 ), the pull-up apparatuses (PU 1 , PU 2 ) and the pull-down apparatuses (PD 1 , PD 2 ) in a short-circuit test mode in order to detect short-circuit current; the control unit ( 8 ) configured to detect a short-circuit current by: a) switching on the pull-down apparatuses (PD b) switching on the pull-up apparatuses (PU