Resolver integral demodulation using zero crossing points

US11722343B1 · kind B1 · utility

Assignee

• Hamilton Sundstrand Corporation (HSC) · US

Inventors

• Sundaram Kaliyugavaratharajan · Survanagiri, IN
• Ashish Vijay · Gothan, IN

Key dates

• Filing date: Jul 8, 2022
• Grant date: Aug 8, 2023
• Expiry date: Jul 8, 2042

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L27/06
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Examples described herein provide a method that includes storing, in a first buffer associated with a first ADC of a DSP, resolver sine values collected from first, second, and third resolvers. The method further includes storing, in a second buffer associated with a second ADC of the DSP, resolver cosine values collected from the first, second, and third resolvers. The method further includes storing, in a third buffer associated with a third ADC of the DSP, resolver excitation values collected from the first, second, and third resolvers. The method further includes determining a midpoint value of the resolver excitation values, determining a sine amplitude based at least in part on the resolver sine values and the midpoint value, and determining a cosine amplitude based at least in part on the resolver sine values and the midpoint value. The method further includes identifying a quadrant of a resolver position.