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1. (WO2019027852) ACTIVE LIMITING CIRCUIT FOR INTRINSICALLY SAFE EQUIPMENT
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Pub. No.: WO/2019/027852 International Application No.: PCT/US2018/044267
Publication Date: 07.02.2019 International Filing Date: 28.07.2018
IPC:
H02H 3/38 (2006.01) ,H02H 9/02 (2006.01) ,H02H 9/04 (2006.01) ,H02H 9/00 (2006.01)
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
H
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
3
Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection
38
responsive to both voltage and current; responsive to phase angle between voltage and current
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
H
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
9
Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
02
responsive to excess current
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
H
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
9
Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
04
responsive to excess voltage
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
H
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
9
Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
Applicants:
NATIONAL OILWELL VARCO, L.P. [US/US]; 7909 Parkwood Circle Drive Houston, Texas 77036, US
Inventors:
BECKER, Matthew David; US
MCBAIN, Andrew; US
Agent:
PATEL, Nick P.; US
MAAG, Gregory L.; US
Priority Data:
15/665,02131.07.2017US
Title (EN) ACTIVE LIMITING CIRCUIT FOR INTRINSICALLY SAFE EQUIPMENT
(FR) CIRCUIT LIMITEUR ACTIF POUR ÉQUIPEMENT INTRINSÈQUEMENT SÛR
Abstract:
(EN) An active limiting switch includes a comparator (312) and a power switch (212). The comparator is configured to compare a reference voltage (354) with a sense voltage (352). The sense voltage is representative of a proportional approximation to power in a load (108) being driven by a battery (102). The power switch is configured to be, in response to the reference voltage being less than the sense voltage, in an open state. The power switch is also configured to be, in response to the reference voltage being greater than the sense voltage, in a closed state creating a closed circuit between the battery and the load allowing the battery to provide a first amount of power to the load.
(FR) Un commutateur de limitation actif comprend un comparateur (312) et un interrupteur d'alimentation (212). Le comparateur est configuré pour comparer une tension de référence (354) à une tension de détection (352). La tension de détection est représentative d'une approximation proportionnelle à la puissance dans une charge (108) qui est entraînée par une batterie (102). L'interrupteur d'alimentation est configuré pour être, en réponse à la tension de référence inférieure à la tension de détection, dans un état ouvert. L'interrupteur d'alimentation est également configuré pour être, en réponse à la tension de référence supérieure à la tension de détection, dans un état fermé créant un circuit fermé entre la batterie et la charge permettant à la batterie de fournir une première quantité d'énergie à la charge.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)