Apparatus for estimating quantity of state relating to motor, and electric tool
US9425730B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2012 |
| Grant date | Aug 23, 2016 |
| Priority date | — |
| Expiry date | Dec 15, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P23/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present application discloses an apparatus including: a motor model that reflects a characteristic of a motor and includes at least inputs pertaining to a first quantity of state and a second quantity of state and an output pertaining to a third quantity of state; a comparator that calculates a difference between the third quantity of state in an actual motor and the third quantity of state output from the motor model; and an amplifier that amplifies an output of the comparator at a predetermined gain. The first quantity of state in the actual motor is input into the motor model as the first quantity of state, and an output of the amplifier is input into the motor model as the second quantity of state. The apparatus then uses the output of the amplifier as an estimated value of the second quantity of state in the actual motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.