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Machine translation
1. (WO2001089072) METHOD FOR CONTROLLING THE STARTING OF AN AC INDUCTION MOTOR UTILIZING CLOSED LOOP ALPHA CONTROL
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2001/089072    International Application No.:    PCT/GB2001/002179
Publication Date: 22.11.2001 International Filing Date: 18.05.2001
Chapter 2 Demand Filed:    06.12.2001    
IPC:
H02P 1/26 (2006.01)
Applicants: EATON CORPORATION [US/US]; Eaton Center 1111 Superior Avenue Cleveland, OH 44114-2584 (US).
EATON LIMITED [GB/GB]; P.O. Box 22 Norfolk Street Worsley Road North Worsley Manchester M28 3ET (GB) (CA only)
Inventors: GRITTER, David, James; (US).
WANG, Dora, Yuan; (US)
Agent: WEST, Alan, H. @ R.G.C. Jenkins & Co.; 26 Caxton Street London SW1H 0RJ (GB)
Priority Data:
09/574,852 19.05.2000 US
Title (EN) METHOD FOR CONTROLLING THE STARTING OF AN AC INDUCTION MOTOR UTILIZING CLOSED LOOP ALPHA CONTROL
(FR) PROCEDE POUR CONTROLER LE DEMARRAGE D"UN MOTEUR A INDUCTION C.A. UTILISANT UNE COMMANDE ALPHA EN BOUCLE FERMEE
Abstract: front page image
(EN)A method is provided for controlling a three-phase, AC induction motor (12). Each phase of the AC induction motor (12) is connected to an AC input source (18) by a thyristor switch (22a-22c) and a bypass contactor (24a-24c) connected in parallel in order to provide voltage and current to the AC induction motor (12). The method includes the steps of sequentially firing pairs of thyristor switches (22a-22c) at a predetermined initial alpha firing angle. A new alpha firing angle is calculated which is dependant upon the initial alpha firing angle. Thereafter, pairs of thyristor switches (22a-22c) are fired at the new alpha firing angle. The new alpha firing angle is provided as the initial alpha firing angle and a new alpha firing angle is calculated. The process is repeated until the AC induction motor (12) reaches its full operating speed.
(FR)L"invention concerne un procédé de contrôle d"un moteur à induction C.A. triphasé (12). Chaque phase du moteur à induction C.A. (12) est connectée à une source d"entrée C.A. (18) par un commutateur à thyristor (22a-22c) et un contacteur de dérivation (24a-24c) en parallèle afin de fournir une tension et un courant au moteur à induction C.A. (12). Le procédé consiste à allumer séquentiellement des paires de commutateurs à thyristor (22a-22c) à un angle d"allumage alpha initial préétabli. Un nouvel angle d"allumage alpha, tributaire de l"angle d"allumage alpha initial, est calculé. Des paires de commutateurs à thyristor (22a-22c) sont ensuite allumées selon le nouvel angle d"allumage alpha. Ce nouvel angle d"allumage alpha est adopté comme angle d"allumage alpha initial et un nouvel angle d"allumage alpha est calculé. Le processus est répété jusqu"à ce que le moteur à induction C.A. (12) atteigne sa pleine vitesse de régime.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, UZ, VN, YU, ZA, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)