Circuit arrangement

Patent metadata

Field	Value
Publication number	US-9843320-B2
Application number	US-201415101486-A
Country	US
Kind code	B2
Filing date	Nov 14, 2014
Priority date	Dec 4, 2013
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

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

The invention claimed is:

1. A circuit arrangement ( 1 ) comprising a high-voltage semiconductor bridge circuit ( 2 ) having a low-side semiconductor switch ( 4 ), a high-side semiconductor switch ( 3 ), and a logic unit ( 7 ), 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 ), and the logic unit ( 7 ) is connected to at least one of the flyback converters ( 8 , 9 ), wherein at least one of the flyback converters ( 7 , 8 , 9 ) is a high-voltage flyback converter; and wherein a supply voltage for the logic unit ( 7 ) comes from at least one of the connected flyback converters ( 8 , 9 ).

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 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 ).

4. 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 ).

5. 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 ).

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

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

8. 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

• H02M7/5387

  in a bridge configuration · CPC title

• H02M2001/325

  Electricity · mapped topic

• H02M1/08

  Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters · CPC title

• H02P6/14

  Electronic commutators · CPC title

• 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