Control device for a stepping motor included in an electronic apparatus
US5703455A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 3, 1996 |
| Grant date | Dec 30, 1997 |
| Priority date | — |
| Expiry date | Sep 3, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control device for controlling the drive of a stepping motor included in an electronic apparatus as a drive source is disclosed. The stepping motor is totally controlled by a microprocessor and driven by a motor driver. A memory stores control data for the acceleration, constant-speed drive and deceleration of the motor. A motor controller controls the motor via the motor driver with the control data loaded without the intermediary of the microprocessor. A constant-speed rotation end signal is input to the motor controller from either a CPU (Central Processing Unit) or an external unit as a repeat signal. When the repeat signal is "0", the control data stored in the memory and assigned to constant-speed drive is repeatedly loaded a preselected number or times, causing the motor to rotate at a constant speed. When the repeat signal is "1", the above control data is repeatedly loaded until the repeat signal changes to "0".
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.