Apparatus, method and program for controlling an electric motor
US6812668B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2003 |
| Grant date | Nov 2, 2004 |
| Priority date | — |
| Expiry date | Jun 4, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P1/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Apparatus, method and program for controlling electric motors to drive movable objects, wherein an input-rectifying device is operable, when a control signal to be applied to one of the electric motors requires the motor to be operated so as to operate the object in a direction opposite to a predetermined direction, to rectify the control signal so as to limit a motion of the object in the opposite direction, and a differential-control-quantity compensating device is operable after expiration of a predetermined time after a differential control quantity used together with proportional and integral control quantities to generate a control signal to be applied to another motor is updated on the basis of an error between a detected speed and a target speed of the object, so as to reduce the differential control quantity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.