Operating a resolver and detecting a defect in the resolver

US9857204B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Manfred Kirschner · Stuttgart, DE
• Edwin Eberlein · Stuttgart, DE

Key dates

• Filing date: Jun 11, 2015
• Grant date: Jan 2, 2018
• Expiry date: Jun 16, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D5/2073
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An apparatus for operating a resolver which includes at least one first receiver winding and an exciter winding, which are/can be associated with a rotor, and an evaluation device which determines an angular position of the rotor as a function of an induced voltage that is generated by the exciter winding and detected by the receiver winding. According to the invention, the first receiver winding is connected at a first end to an actuable switch by means of a first RC circuit, said switch connecting the RC circuit as required to a positive voltage source, and the first receiver winding is connected at a second end to a second actuable switch by means of a second RC circuit, said second switch connecting the second RC circuit as required to a negative voltage source, and to a control unit which simultaneously actuates the switches as required.