VCM PWM to linear mode transition offset optimization to improve PES
US11763843B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2022 |
| Grant date | Sep 19, 2023 |
| Priority date | — |
| Expiry date | May 11, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5543
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Various illustrative aspects are directed to a data storage device comprising one or more disks, an actuator arm assembly comprising one or more disk heads and a voice coil motor (VCM), the VCM configured to operate in a PWM mode and a linear mode, and one or more processing devices configured to: seek the VCM towards a target track in the PWM mode; transition the VCM from the PWM mode to the linear mode, wherein the transitioning comprises switching an offset compensation value from a first offset compensation value to a second compensation offset value to compensate for a transition offset induced while transitioning the VCM from the PWM to the linear mode, wherein the first and the second offset compensation values correspond to the PWM and linear modes, respectively, and seek the VCM towards the target track in the linear mode for a linear mode time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.