Patent · US Expired

Brushless motor with torque and speed proportional coolant flow

US5698912A · kind A · utility

15Cited by

6References

21Claims

0Family size

Assignee

Grundl und Hoffmann GmbH Gesellschaft fur Elektrotechnische

Inventors

Reinhard Rasch · Murnau am Staffelsee, DE
Andreas Grundl · Hersbruck, DE
Bernhard Hoffmann · Starnberg, DE

Key dates

Filing date	Nov 2, 1995
Grant date	Dec 16, 1997
Priority date	—
Expiry date	Nov 2, 2015

Classification

Technology area (CPC H)Electricity
CPC primaryH02K17/16
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A brushless electric motor has a fluid-tight housing, an internal rotor which is connected to an output shaft, stator plates which are disposed at a radial spacing from the rotor, a coolant delivery line leading into the interior of the housing, and a coolant discharge line leading out of the housing. A control arrangement, which as a function of the rotational speed and torque adjusts the volume flow of the coolant flowing through the interior of the housing, is provided to keep the efficiency of the arrangement as a whole high and to provide an electric motor having high power density.

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