Asynchronous motor-driven machine having variable torque demand, such as household refrigerator compressors

US4217763A · kind A · utility

Assignee

• Bosch-Siemens Hausgeraete GmbH

Inventors

• Karl Hammele · Giengen an der Brenz, DE
• Henno Schotten · Giengen an der Brenz, DE

Key dates

• Filing date: Apr 11, 1977
• Grant date: Aug 19, 1980
• Expiry date: Apr 11, 1997

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02P25/04
• WIPO field: Control
• WIPO sector: Instruments

Abstract

In an assembly of a work-performing machine having variable torque demand driven by an asynchronous motor, a phase-angle control device for varying the operating voltage of the asynchronous motor in accordance with the respectively required torque, the asynchronous motor being operable with substantially optimal efficiency, by means of said phase angle control device, with the operating voltage matched to the respectively required torque.