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1. (WO2019027461) OPEN LOAD DIAGNOSTICS FOR LOADS THAT ARE PWM CONTROLLED
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Pub. No.: WO/2019/027461 International Application No.: PCT/US2017/045300
Publication Date: 07.02.2019 International Filing Date: 03.08.2017
IPC:
G01R 31/02 (2006.01) ,G01R 31/42 (2006.01) ,H02H 3/12 (2006.01)
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31
Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
02
Testing of electric apparatus, lines, or components for short-circuits, discontinuities, leakage, or incorrect line connection
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31
Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
40
Testing power supplies
42
AC power supplies
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
12
responsive to underload or no-load
Applicants:
CUMMINS INC. [US/US]; 500 Jackson Street Columbus, Indiana 47201, US
Inventors:
BHAT, Subramanya; IN
KOLI, Santosh Shankar; IN
BELDE, Shashi Kanth; US
MUSA, Abu; US
Agent:
LUETTGEN, David G.; US
BROWN, Marshall J.; US
NEUWORTH, Alexander J.; US
Priority Data:
Title (EN) OPEN LOAD DIAGNOSTICS FOR LOADS THAT ARE PWM CONTROLLED
(FR) DIAGNOSTICS DE CHARGE OUVERTE POUR DES CHARGES RÉGULÉES PAR MODULATION DE LARGEUR D'IMPULSIONS (MLI)
Abstract:
(EN) Methods and apparatuses for detecting an open load condition for a load. The load is coupled to a power source at a high side and to a ground at a low side through at least one switch, the load has a first end and a second end, a first voltage at the first end is kept constant. A switch is controlled by a PWM signal. After the switch is turned off by the PWM signal, the voltage associated with the second end of the load is measured. In one embodiment, a change of the second voltage during a predefined delay is compared with a predefined voltage threshold. In another embodiment, the time it takes for the change of the second voltage to reach a predefined voltage threshold is compared with a predefined time threshold.
(FR) L'invention concerne des procédés et des appareils permettant de détecter une condition de charge ouverte pour une charge. La charge est couplée à une source d'alimentation au niveau du côté supérieur et à une masse au niveau du côté inférieur par l'intermédiaire d'au moins un commutateur, la charge ayant une première extrémité et une seconde extrémité, une première tension au niveau de la première extrémité étant maintenue constante. Un commutateur est commandé par un signal de MLI. Une fois le commutateur mis hors tension par le signal de MLI, la tension associée à la seconde extrémité de la charge est mesurée. Dans un mode de réalisation, une variation de la seconde tension pendant un retard prédéfini est comparée à un seuil de tension prédéfini. Dans un autre mode de réalisation, la durée nécessaire à la variation de la seconde tension pour atteindre un seuil de tension prédéfini est comparée à un seuil de durée prédéfini.
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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)