Controlled current supply circuit from a battery to a motor
US4262238A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1979 |
| Grant date | Apr 14, 1981 |
| Priority date | — |
| Expiry date | Jun 8, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/921
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To reliably turn OFF a pulse-controlled thyristor in series with a battery supplied motor circuit, in case of malfunction of the control circuit, or even of the supervisory circuit itself, the voltage across the thyristor is sensed and, if an ON condition of the thyristor, as represented by sensed voltage, is determined while the pulse source does not provide an ON command, a disabling control signal is applied to the pulse source to provide an OFF command; in case of failure of the sensing element, an additional voltage is supplied, through a time delay circuit to the disabling input. Time delay circuits are interposed between the respective sensed signal and command signal and applied through a logic circuit to prevent spurious operation of the monitoring and safety circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.