Rectifier assembly having heat-dissipating structure for an alternator

US6812604B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Horst Braun · Stuttgart, DE
• Holger Scholzen · Stuttgart, DE
• Peter Urbach · Gomaringen, DE
• Holger Haussmann · Metzingen, DE
• Dana Keppeler · Markdorf, DE
• Thomas Bilsing · Brackenheim, DE

Key dates

• Filing date: Oct 27, 2003
• Grant date: Nov 2, 2004
• Expiry date: Oct 27, 2023

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02K11/05
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

The invention relates to an electrical machine, preferably an alternator (10) for motor vehicles, comprising a rectifier assembly (11a) that is fixed to an end shield (23) of the machine. Said rectifier assembly is cooled by a fan (27) that operates in the end shield (23), the diodes being positioned on a negative connecting plate (15) and a positive connecting plate (17) of the rectifier assembly (11). The aim of the invention is to evacuate the dissipated heat from the rectifier assembly (11a) in an advantageous manner. To achieve this, the rectifier assembly is located in an opening in the front face (32) of the end shield (23) and is connected in an electrically and thermally conductive manner by one of its two connecting plates (15 and 17) to a cooling body (33), which is connected to the exterior of the end shield (23) and covers the opening (32). The cooling air that is thus taken in by the fan (27) first flows from the exterior across the cooling body (33) in a radial manner towards the interior, entering the machine in the vicinity of the shaft through orifices (30) in the end shield (23) and from here, having reached the fan (27), subsequently flows past the other connect…