Swinging drive control apparatus and method
US10646786B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 18, 2019 |
| Grant date | May 12, 2020 |
| Priority date | — |
| Expiry date | Feb 18, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P7/29
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
Disclosed is a swinging drive control apparatus, including a controller and a motor, where the controller detects a counter-electromotive force of the motor and drives the motor according to the detection result. Also disclosed is a corresponding method, including: measuring a counter-electromotive force of a motor in a previous cycle; and comparing a maximum counter-electromotive force value with a preset value, and calculating a PWM pulse duty factor in a next cycle. By directly detecting the counter-electromotive force of the motor without using a sensor, the present invention implements swinging frequency and phase tracking as well as swinging amplitude control, and simplifies a control system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.