System and method of increasing resolution of position feedback for motor control
US12278575B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2022 |
| Grant date | Apr 15, 2025 |
| Priority date | — |
| Expiry date | Apr 22, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor drive receives a position feedback signal from an encoder operatively connected to a motor. The motor drive executes multiple position determination modules to determine multiple approximate motor shaft positions. On each iteration of a position determination module, the motor drive samples the feedback signal, increments a pulse counter when a new encoder pulse is received, adds the pulse counter to a high-resolution pulse counter register, and calculates an approximate motor position as a function of the value of the high-resolution pulse count register. The motor drive averages the multiple approximate positions, and the result is used by a speed regulator module executed on the same motor drive to achieve the desired operation of the motor. The speed regulator iterates at a slower rate than any of the multiple position determination modules.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.