Duty ratio control device, electric power tool and recording medium
US8552669B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 6, 2011 |
| Grant date | Oct 8, 2013 |
| Priority date | — |
| Expiry date | Jan 11, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P7/2913
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A duty ratio control device includes a duty ratio calculation unit and a parameter setting unit. The duty ratio calculation unit, when an acceleration manipulation is performed, calculates a control duty ratio per predetermined timing based on a value of at least one parameter so that a rotation speed of a motor mounted on an electric power tool reaches a target rotation speed corresponding to the acceleration manipulation. The control duty ratio is calculated to be larger as the value of the at least one parameter is larger. The parameter setting unit sets the value of the at least one parameter. The value of the at least one parameter set for a reacceleration manipulation is larger than the value of the at least one parameter set for an initial acceleration manipulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.