Converter for electrical machines

• US 20040021376A1
• Filed: 06/02/2003
• Published: 02/05/2004
• Est. Priority Date: 05/15/2001
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Beulich, Klaus
• Application Number:
  US10/333,086
• Publication Number:
  US 20040021376A1
• Time in Patent Office: Days
• US Class Current: 310/52
• CPC Class Codes: H02K 11/05 Rectifiers associated with casings, enclosures or brackets
• CPC Class Codes: H02M 7/493 the static converters being arranged for operation in parallel

Abstract

The converter comprises a plurality of bridge circuits (1, 2, 3, . . . . , n), connected to phase windings (4, 5, 6, 7) of a machine, of which each circuit has a plurality of electrically controllable switches (11, 12, 21, 22, 31, 32, . . . , n1, n2) and one buffer memory embodied as a capacitor (15).

A version of the converter that is simple from a production standpoint and is highly economical in terms of space is obtained by providing that the capacitor (15) is embodied as a foil capacitor surrounding the machine, to the electrodes (16, 17) of which the bridge circuits (1, 2, 3, n) are connected, distributed over the circumference of the machine.

Claims

1. A converter for electric machines, in particular for starters or starter-generators in motor vehicles, in which the converter comprises a plurality of bridge circuits (1, 2, 3, . . . , n) connected to phase windings (4, 5, 6, 7) of the machine, of which circuits each has a plurality of electrically controllable switches (11, 12, 21, 22, 31, 32, . . . , n, n2) and one buffer memory, embodied as a capacitor (15), characterized in that a foil capacitor (15) surrounding the machine (9) is present, to whose electrodes (16, 17) the bridge circuits (1, 2, 3, . . . , n) are connected, distributed over the circumference of the machine (9).

2. The converter of claim 1, characterized in that the foil capacitor (15) and the switches (11, 12), contacted with it, of the bridge circuits are fixed jointly on a heat sink (10) surrounding the machine.

3. The converter of claim 2, characterized in that the foil capacitor (15) and the switches (11, 12) of the bridge circuits are fixed side by side on the cylindrical surface of the heat sink (10).

4. The converter of claim 2, characterized in that the foil capacitor (15) is fixed on the cylindrical surface of the heat sink (10), and the switches (11, 12) of the bridge circuits are fixed on an end face, oriented perpendicular to the cylindrical surface, of the heat sink (10).

5. The converter of claim 2, characterized in that the foil capacitor (15) and the switches (11, 12) of the bridge circuits are disposed in two planes one above the other on the cylindrical surface of the heat sink (10), and the switches (11, 12) are disposed in the plane located closest to the heat sink (10).

6. The converter of one of claims 2-5, characterized in that the heat sink (10), in its interior, has one or more conduits (20) for the flow therethrough of a coolant.