Circuit arrangement

Patent metadata

Field	Value
Publication number	US-2016308526-A1
Application number	US-201415101486-A
Country	US
Kind code	A1
Filing date	Nov 14, 2014
Priority date	Dec 4, 2013
Publication date	Oct 20, 2016
Grant date	—

Abstract

The invention relates to a circuit arrangement ( 1 ), in particular for controlling an electric machine, comprising at least one high-voltage semiconductor bridge circuit ( 2 ) that includes a low-side semiconductor switch ( 4 ) and a high-side semiconductor switch ( 3 ). A high-side gate driver ( 5 ) is assigned to the high-side semiconductor switch ( 3 ), and a low-side gate driver ( 6 ) is assigned to the low-side semiconductor switch ( 4 ). According to the invention, a high-side flyback converter ( 8 ) is connected upstream of the high-side gate driver, and a low-side flyback converter ( 9 ) is connected upstream of the low-side gate driver ( 6 ), at least one of the flyback converters ( 7, 8, 9 ) being designed as a high-voltage flyback converter.

First claim

1 . A circuit arrangement ( 1 ) comprising a high-voltage semiconductor bridge circuit ( 2 ) having a low-side semiconductor switch ( 4 ) and a high-side semiconductor switch ( 3 ), wherein a high-side gate driver ( 5 ) is assigned to the high-side semiconductor switch ( 3 ) and a low-side gate driver ( 6 ) is assigned to the low-side semiconductor switch ( 4 ), characterized in that a high-side flyback converter ( 8 ) is connected upstream of the high-side gate driver and a low-side flyback converter ( 9 ) is connected upstream of the low-side gate driver ( 6 ), wherein at least one of the flyback converters ( 7 , 8 , 9 ) is a high-voltage flyback converter.

2 . The circuit arrangement as claimed in claim 1 , characterized in that both flyback converters ( 8 , 9 ) are high-voltage flyback converters.

3 . The circuit arrangement as claimed in claim 1 , characterized in that the high-voltage semiconductor bridge circuit ( 2 ) has a logic unit ( 7 ), connected to at least one of the flyback converters ( 8 , 9 ), a supply voltage for the logic unit ( 7 ) coming from at least one of the connected flyback converters ( 8 , 9 ).

4 . The circuit arrangement as claimed in claim 1 , characterized in that the logic unit ( 7 ) is connected to the two flyback converters ( 8 , 9 ) and a supply voltage for the logic unit ( 7 ) comes from both of the connected flyback converters ( 8 , 9 ).

5 . The circuit arrangement as claimed in claim 1 , characterized in that at least one of the flyback converters ( 8 , 9 ) has an auxiliary winding for the voltage supply of the logic unit ( 7 ).

6 . The circuit arrangement as claimed in claim 1 , characterized in that the flyback converters ( 8 , 9 ) are connected to the logic unit ( 7 ) in parallel with one another by a respective interposed diode ( 12 , 13 ).

7 . The circuit arrangement as claimed in claim 1 , wherein the circuit arrangement is an inverter comprising at least one further semiconductor bridge circuit.

8 . The circuit arrangement as claimed in claim 1 , wherein the circuit arrangement drives an electric machine.

9 . The circuit arrangement as claimed in claim 1 , characterized in that both of the flyback converters ( 8 , 9 ) have an auxiliary winding for the voltage supply of the logic unit ( 7 ).

Assignees

• Bosch Gmbh Robert

Inventors

• Richter Tobias
• Butzmann Stefan
• Aldinger Stefan

Classifications

• H03K17/567 Primary

  Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT · CPC title

• H02P6/14

  Electronic commutators · CPC title

• H03K2217/0063

  High side switches, i.e. the higher potential [DC] or life wire [AC] being directly connected to the switch and not via the load · CPC title

• H03K2217/0072

  Low side switches, i.e. the lower potential [DC] or neutral wire [AC] being directly connected to the switch and not via the load · CPC title

• H03K17/162 Primary

  without feedback from the output circuit to the control circuit · CPC title