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1. (WO2010082115) METHOD FOR MEASURING AN ELECTRICAL CURRENT
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2010/082115 International Application No.: PCT/IB2010/000054
Publication Date: 22.07.2010 International Filing Date: 13.01.2010
IPC:
G01R 19/20 (2006.01) ,G01R 15/18 (2006.01)
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
19
Arrangements for measuring currents or voltages or for indicating presence or sign thereof
18
using conversion of dc into ac, e.g. with choppers
20
using transductors
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
15
Details of measuring arrangements of the types provided for in groups G01R17/-G01R29/, G01R33/-G01R33/26176
14
Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
18
using inductive devices, e.g. transformers
Applicants:
SENECA S.r.l. [IT/IT]; Via Germania, 34 35127 Padova, IT
Inventors:
Priority Data:
PD2009A00000513.01.2009IT
Title (EN) METHOD FOR MEASURING AN ELECTRICAL CURRENT
(FR) PROCÉDÉ DE MESURE D'UN COURANT ÉLECTRIQUE
Abstract:
(EN) A measuring method of an electrical current (li) comprising the steps of: electrically feeding with an electric alternative current (I2) one or more first coils (4) wound around an inductor (3) to generate an alternated induced magnetic field that cyclically saturate said inductor (3) from a saturation state to the saturation state with the opposite sense, said electric alternative current (I2) having a null continuous component; winding said inductor (3) with one or more second coils (5) belonging to said user electrical circuit (U) so that the current to be measured (U) generate in said inductor (3) an additional magnetic field that varies the cycle of said inductor (3) passing from a saturation state to the saturation state with opposite sense; modifying the shape of the wave of said alternative electrical current (I2) so as to keep unchanged the saturation values of the overall magnetising field of said inductor (3), said alternative electric current (I2) with modified wave shape introducing a not null continuous component proportional to the current to be measured (I1).
(FR) La présente invention concerne un procédé de mesure d'un courant électrique (I1) consistant à alimenter électriquement avec un courant électrique alternatif (I2) une ou plusieurs premières bobines (4) enroulées autour d'un inducteur (3) pour générer un champ magnétique induit alterné qui sature cycliquement ledit inducteur (3) à partir d'un état de saturation vers l'état de saturation de sens opposé, ledit courant électrique alternatif (I2) comportant un composant continu nul ; à entourer ledit inducteur (3) avec une ou plusieurs secondes bobines (5) appartenant audit circuit électrique de l'utilisateur (U) de façon que le courant à mesurer (U) génère, dans ledit inducteur (3), un champ magnétique supplémentaire qui fait varier le cycle dudit inducteur (3) en passant d'un état de saturation à l'état de saturation de sens opposé ; à modifier la forme de l'onde dudit courant électrique alternatif (I2) de façon à garder inchangées les valeurs de saturation du champ de magnétisation global dudit inducteur (3), ledit courant électrique alternatif (I2) possédant la forme d'onde modifiée introduisant un composant continu non nul proportionnel au courant à mesurer (I1).
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, 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, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (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, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: Italian (IT)