Method of correcting a signal delay of a hall sensor for an air compressor motor
US10903768B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 4, 2019 |
| Grant date | Jan 26, 2021 |
| Priority date | — |
| Expiry date | Oct 4, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of correcting a signal delay of a Hall sensor for an air compressor motor when the air compressor motor rotates at a high speed includes: a first step of calculating an offset angle θ from a voltage equation, to which a q-axis voltage and a d-axis voltage are applied, by performing zero current control when an inertia braking section occurs during an operation of the motor; a second step of calculating a reference offset angle θoffset of the Hall sensor and a delay time t by using an angular velocity ω at any two points in the inertia braking section by using the equation for calculating the offset angle θ; and a third step of calculating a corrected q-axis voltage and a corrected d-axis voltage through the zero current control corrected and comparing the corrected q-axis voltage and the corrected d-axis voltage with a reference error.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.