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1. (WO1998050993) INDUCTIVE POWER TRANSFER ACROSS AN EXTENDED GAP
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1998/050993 International Application No.: PCT/NZ1998/000053
Publication Date: 12.11.1998 International Filing Date: 04.05.1998
Chapter 2 Demand Filed: 05.11.1998
IPC:
H01F 38/14 (2006.01) ,H02J 5/00 (2006.01) ,H02M 7/538 (2007.01)
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
F
MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
38
Adaptations of transformers or inductances for specific applications or functions
14
Inductive couplings
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
J
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
5
Circuit arrangements for transfer of electric power between ac networks and dc networks
H ELECTRICITY
02
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
M
APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
7
Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
42
Conversion of dc power input into ac power output without possibility of reversal
44
by static converters
48
using discharge tubes with control electrode or semiconductor devices with control electrode
53
using devices of a triode or transistor type requiring continuous application of a control signal
537
using semiconductor devices only, e.g. single switched pulse inverters
538
in a push-pull configuration
Applicants: BOYS, John, Talbot[NZ/NZ]; NZ (UsOnly)
AUCKLAND UNISERVICES LIMITED[NZ/NZ]; Uni Services House, Level 7 58 Symonds Street Auckland 1001, NZ (AllExceptUS)
Inventors: BOYS, John, Talbot; NZ
Agent: PIPER, James, William ; James W. Piper & Co. Wellesley Street P.O. Box 5298 Auckland 1036, NZ
Priority Data:
31475406.05.1997NZ
Title (EN) INDUCTIVE POWER TRANSFER ACROSS AN EXTENDED GAP
(FR) TRANSFERT D'ENERGIE INDUCTIF A TRAVERS UN ESPACE ETENDU
Abstract:
(EN) Inductive power transfer across an extended gap (100) from a primary conductor (119) is provided by means of a resonant intermediate loop comprised of capacitor (118) with inductor (117) - perhaps simply a non-coiled wire - carrying a larger resonating current, that can in turn generate an inductive field to be collected by a pickup coil (120). This loop may increase the transfer rate or reduce the alignment accuracy required of an IPT system, useful for vehicles as well as for lighting and display purposes, and also offers frequency-stabilising features. An electroluminescent advertising panel may be powered from a sine-wave oscillator at 1.2 kHz; its DC power at 50 volts collected by a controlled secondary pickup coil tuned to a system frequency of 15 kHz and placed near to an intermediate pickup coil; also resonant at the system frequency and which is driven by inductive coupling from a primary conductor fed with alternating current at the system frequency.
(FR) L'invention concerne un transfert d'énergie inductif à travers un espace étendu (100) à partir d'un conducteur primaire (119), au moyen d'une boucle intermédiaire résonnante comprenant un condensateur (118) à bobine d'induction (117) - pouvant être simplement un fil non hélicoïdal - transportant un courant de résonance plus grand, qui peut à son tour générer un champ inductif devant être recueilli par une bobine d'appel (120). Cette boucle peut augmenter la vitesse de transfert ou réduire la précision d'alignement requises dans un système de transfert d'énergie inductif s'utilisant pour des véhicules ainsi que pour des dispositifs d'éclairage et d'affichage, et peut également présenter des caractéristiques de stabilisation de fréquence. Un panneau publicitaire électroluminescent peut être alimenté à partir d'un oscillateur sinusoïdal à 1,2 kHz; son alimentation c.c à 50 volts étant recueillie par une bobine d'appel secondaire commandée accordée à une fréquence du réseau de 15kHz et placée à côté d'une bobine d'appel intermédiaire; ce panneau est également résonnant à la fréquence du réseau et est commandé par couplage inductif à partir d'un conducteur primaire alimenté par un courant alternatif à la fréquence du réseau.
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Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, GW, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (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, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)