Patent · US Active

Electric machine having mechanical field weakening and including a fail-safe actuator system

US10498182B2 · kind B2 · utility

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10Claims

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Assignee

Schaeffler Technologies AG & Co. KG · DE

Inventors

Thomas Schencke · Ahrensfelde, DE
Thomas Pfund · Leiberstung, DE

Key dates

Filing date	Apr 16, 2015
Grant date	Dec 3, 2019
Priority date	—
Expiry date	Jul 27, 2036

Classification

Technology area (CPC H)Electricity
CPC primaryH02K21/028
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A dynamoelectric permanently excited machine having the possibility of mechanical field weakening. The machine includes a stator (1), a rotor (2) spaced apart from the stator (1) by an air gap (8), permanent magnets (4) arranged on the rotor (2) for generating an excitation field in the air gap (8), and a centrifugal-force-controlled field-weakening mechanism for weakening the excitation field in the air gap (8) in accordance with rotational speed. In order to increase the operational safety of systems that are driven by such a machine, the machine also includes a signal input for a fault signal and an actuator for controlling the field-weakening mechanism independently of rotational speed.

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