Patent · US Active

Fan having an external rotor motor and cooling duct for cooling the motor electronics and motor drive components

US11680584B2 · kind B2 · utility

0Cited by

2References

15Claims

0Family size

Assignee

ebm-papst Mulfingen GmbH & Co. KG · DE

Inventors

Christian Haag · Assamstadt, DE
Tobias Schmidt · Munich, DE
Wolfgang Buerckert · Bad Mergentheim, DE

Key dates

Filing date	Jan 12, 2021
Grant date	Jun 20, 2023
Priority date	—
Expiry date	Jun 24, 2041

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04D29/5813
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A fan has an external rotor motor with a motor section and an electronics section. The motor section and the electronics section are arranged axially adjacent to each other along the axis of rotation. The fan, when operated as intended, generates, via the fan wheel, a pressure difference between its suction side, which is preferably associated with the rotor, and its pressure side, which is preferably associated with the motor electronics. A continuous cooling duct runs within the external rotor motor from a pressure-side inflow opening, at least along sections of the rotor, to a suction-side outflow opening. An exclusively passive cooling air flow through the cooling duct can be generated in operation by the pressure difference generated by the fan wheel.

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