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1. (WO1991006047) REVERSE PHASE CONTROL SWITCHING CIRCUIT AND METHOD WITHOUT ZERO CROSSING DETECTION
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/006047 International Application No.: PCT/US1990/005890
Publication Date: 02.05.1991 International Filing Date: 15.10.1990
Chapter 2 Demand Filed: 17.04.1991
IPC:
G05F 1/455 (2006.01) ,H02M 5/293 (2006.01) ,H05B 39/04 (2006.01)
G PHYSICS
05
CONTROLLING; REGULATING
F
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
1
Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
10
Regulating voltage or current
12
wherein the variable is actually regulated by the final control device is ac
40
using discharge tubes or semiconductor devices as final control devices
44
semiconductor devices only
45
being controlled rectifiers in series with the load
455
with phase control
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
5
Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
02
without intermediate conversion into dc
04
by static converters
22
using discharge tubes with control electrode or semiconductor devices with control electrode
275
using devices of a triode or transistor type requiring continuous application of a control signal
293
using semiconductor devices only
H ELECTRICITY
05
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
B
ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
39
Circuit arrangements or apparatus for operating incandescent light sources and not adapted to a particular application
04
Controlling
Applicants:
BAYVIEW TECHNOLOGY GROUP, INC. [US/US]; 35 Bayview Drive San Carlos, CA 94070, US
Inventors:
SCHANIN, David; US
Agent:
BRUCKER, H., Michael; 166 Santa Clara Avenue Oakland, CA 94610, US
Priority Data:
422,39616.10.1989US
Title (EN) REVERSE PHASE CONTROL SWITCHING CIRCUIT AND METHOD WITHOUT ZERO CROSSING DETECTION
(FR) CIRCUIT ET PROCEDE DE COMMUTATION DE COMMANDE DE PHASE INVERSE SANS DETECTION DU PASSAGE PAR ZERO
Abstract:
(EN) A method and circuit for reverse phase control of alternating current (12) being delivered to a load (3) are disclosed wherein voltage-controlled semiconductor switches (1A, 1B), such as MOSFET's and IGBT's are used as electronic switches to conduct voltage during the leading edge of the AC voltage cycle and conduction is terminated when the desired phase angle of the current flow has been reached. The disclosed method and circuit eliminate the need for zero crossing detection of the AC waveform and ensure that the voltage-controlled switches (1A, 1B) are always turned on before the zero crossing thereby minimizing radiated interference and incandescent lamp hum. The method used is primarily digital in nature making mechanical input or electronic input for the power control equally efficient to implement.
(FR) Procédé et circuit de commande de phase inverse de courant alternatif (12) fourni à une charge (3), dans lesquels on utilise des commutateurs (1A, 1B) à semiconducteurs commandés en tension, tels que des transistors à effet de champ OMS et des transistors bipolaires à porte isolée, comme commutateurs électroniques afin de conduire la tension pendant le bord d'attaque du cycle de tension du courant alternatif, la conduction étant achevée lorsque l'angle de phase désiré du flux de courant a été atteint. Le procédé et le circuit de l'invention élimine la nécessité de détection de passage par zéro de la forme d'onde de courant alternatif, et assure que les commutateurs (1A, 1B) commandés en tension sont constamment en circuit avant le passage par zéro, réduisant ainsi au minimum les interférences rayonnées ainsi que le ronflement de secteur d'une lampe incandescente. Le procédé utilisé est en premier lieu numérique par nature, rendant l'entrée mécanique ou l'entrée électronique de la commande de puissance également efficace à mettre en ÷uvre.
Designated States: AU, CA, JP
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
AU1990066479