Patent · US Expired

Electrical machine with air-cooled control chip

US6897583B2 · kind B2 · utility

5Cited by

16References

7Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Andreas Doeffinger · Leonberg, DE
Achim Henkel · Stuttgart, DE
Frank Himmler · Reutlingen, DE
Thomas Bilsing · Brackenheim, DE

Key dates

Filing date	Feb 16, 2002
Grant date	May 24, 2005
Priority date	—
Expiry date	Feb 16, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH02K9/28
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

In an electrical machine, in particular a generator for a motor vehicle, having a housing (2), a rotor (6), supported rotatably in the housing (2) about a pivot axis (5), at least one fan wheel (20), connected to the rotor (6), for generating a cooling air flow (22, 22′, 22″) from at least one intake opening (37; 37′; 37″) disposed in the housing (2) to at least one outlet opening (24) disposed in the housing (2), and at least one regulator chip (31), disposed on a chip holder (30), for regulating the current generation, it is provided that the chip holder (30) is disposed such that it is bathed at least in part directly by the cooling air flow (22, 22′, 22″). As a result of this arrangement, it is attained that a very high heat transfer coefficient is present, because of the high flow speed of the cooling air flow (22, 22′, 22″).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.