Title:
CIRCUIT AND METHOD FOR PROTECTING AGAINST OVERLOAD OF AN ELECTRIC MOTOR
Document Type and Number:
WIPO Patent Application WO2004006406
Kind Code:
A3
Abstract:
The invention relates to a circuit (1) for protecting against overload of an electric motor (2), more particularly an electrically powered air blower for a vehicle, with the purpose of providing sufficient and appropriate protection even when several electric motors are connected in series. Said circuit is provided with at least one switching element (6) for controlling two series connected electric motors (2) independent of revolutions, in which a switch element (14) configured as a make contact element (12) is connected in parallel to the electric motor (2), said switch element causing short circuiting of the corresponding electric motor (2) in case of overheating.
Inventors:
BIELESCH THOMAS (DE)
Application Number:
PCT/EP2003/007101
Publication Date:
March 25, 2004
Filing Date:
July 03, 2003
Export Citation:
Assignee:
BEHR GMBH & CO (DE)
BIELESCH THOMAS (DE)
BIELESCH THOMAS (DE)
International Classes:
H02H7/085; (IPC1-7): H02H7/085; H02K11/00
Foreign References:
| US3638718A | 1972-02-01 |
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