Drive control for DC electric motor
US4864211A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 5, 1988 |
| Grant date | Sep 5, 1989 |
| Priority date | — |
| Expiry date | May 5, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/43115
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A motor drive control that permits a DC electric motor to be rapidly driven and accurately stopped at predetermined stop positions is disclosed. An indexer (V) generates a deceleration point signal at a deceleration point that occurs before a predetermined stop point of load (VI) and a stop point signal at the stop point corresponding to a predetermined destination of the load (VI). A rotational direction detector (III) detects the rotational direction of the motor (IV) as the motor (IV) passes the stop point and produces a rotational direction signal representing the rotational direction of the motor (IV). A rotation control circuit (I) generates a drive signal in response to movement and movement direction signals; a deceleration direction signal in response to the deceleration point signal; an inhibit signal in response to the stop point signal; and a decelerated drive signal representing a reverse rotational direction of the motor (IV). A motor drive circuit (II) produces a drive current having a different amplitude and direction relative to the movement direction signal and the drive signal. The motor drive circuit (II) stops producing the drive current in response to the inhi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.