Rotational control device

US5234192A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Harald Kalippke
• Friedrich Wendel · Rutesheim, DE
• Erhard Renninger · Markgröningen, DE
• Johannes Meiwes · Markgröningen, DE
• Albert Gerhard · Tamm, DE
• Dieter Dick · Rochlitz, DE
• Herbert Becker · Coburg, DE

Key dates

• Filing date: Aug 5, 1992
• Grant date: Aug 10, 1993
• Expiry date: Aug 5, 2012

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M2003/067
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A rotational control device for the setting of angles in actuators, in particular of a restricting device used for determining the flow cross-section in a flow line for internal combustion engines, has an electrical setting motor with a two-pole status and a two-pole permanent magnet rotor. To obtain a robust setting motor, which is technically easy to manufacture in a compact construction, the stator poles are designed as claw poles and the stator winding is located as a toroidal coil in a ring space formed by the claw poles and a ring casing which is coaxial with these, for the magnetic return path. The stator winding is energized by a d.c. supply, with reversible current direction. The magnetic resistances in the magnetic return path and across the claw poles are calibrated such that in the event of a currentless stator winding, the permanent magnet rotor engages in the pole gaps between the claw poles.