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1. (WO2000076056) POWER SUPPLY
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2000/076056    International Application No.:    PCT/GB2000/002141
Publication Date: 14.12.2000 International Filing Date: 02.06.2000
Chapter 2 Demand Filed:    05.12.2000    
H02M 1/12 (2006.01), H02M 7/5387 (2007.01), H05B 6/08 (2006.01)
Applicants: CHELTENHAM INDUCTION HEATING LIMITED [GB/GB]; Phoenix Works, Saxon Way, Battledown Industrial Estate, Cheltenham, Gloucestershire GL52 6RU (GB) (For All Designated States Except US).
SHEIKH, Haroon Karamat [GB/GB]; (GB) (For US Only).
LIPSCOMB, Philip [GB/GB]; (GB) (For US Only).
LEONARD, Michael, Richard [GB/GB]; (GB) (For US Only)
Inventors: SHEIKH, Haroon Karamat; (GB).
LIPSCOMB, Philip; (GB).
LEONARD, Michael, Richard; (GB)
Agent: DUNLOP, Brian, Kenneth, Charles; Wynne-Jones, Laine & James, 22 Rodney Road, Cheltenham, Gloucestershire GL50 1JJ (GB)
Priority Data:
9912799.5 03.06.1999 GB
Abstract: front page image
(EN)A power supply receives an alternating current which is converted by a fixed rectifier to a direct current. The direct current is converted by an inverter to an alternating current of a desired frequency and provided to a parallel resonant fixed load circuit such as a work-coil of an induction heater. The power supply includes means for reducing amplitude of at least a second harmonic of a fundamental frequency of the current output by the inverter so that a filter connected to the load circuit can have a roll-off frequency closer to the design frequency of the load circuit than in conventional power supplies.
(FR)Une alimentation reçoit un courant alternatif qui est converti par un redresseur fixe en courant continu. Le courant continu est converti par un inverseur en courant alternatif présentant la fréquence voulue et est envoyé à un circuit de charge fixe, résonant et parallèle, tel que le serpentin de travail d'un appareil chauffant à induction. L'alimentation comporte un moyen pour réduire l'amplitude d'au moins une harmonique d'une fréquence fondamentale du courant produit en sortie par l'inverseur, de sorte que la fréquence de coupure d'un filtre connecté au circuit de charge soit plus proche de la fréquence nominale du circuit de charge que dans des alimentations classiques.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, 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, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, US, 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)
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)