Power assist device for bicycles, and bicycle
US12168496B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 10, 2020 |
| Grant date | Dec 17, 2024 |
| Priority date | — |
| Expiry date | Dec 14, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62M6/55
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An electric power assist device for bicycles includes: a dynamic brake controller configured to stop supply of a current from a battery to an electric motor and bring a dynamic brake circuit to an ON state when a crank rotational angle is within one or more predetermined crank rotational angle ranges; a pedaling force estimator configured to estimate a pedaling force put on pedals of a bicycle on a value of reverse current caused by a counter electromotive force and detected by a current sensor when the dynamic brake circuit is in the ON state; and a motor drive controller configured to control the electric motor based on the pedaling force estimated by the pedaling force estimator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.