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1. WO2020222889 - HIGH EFFICIENCY PASSIVE CLAMP

Publication Number WO/2020/222889
Publication Date 05.11.2020
International Application No. PCT/US2020/017672
International Filing Date 11.02.2020
IPC
H02M 3/335 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS 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
3Conversion of dc power input into dc power output
22with intermediate conversion into ac
24by static converters
28using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
325using devices of a triode or a transistor type requiring continuous application of a control signal
335using semiconductor devices only
H03K 17/0814 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
17Electronic switching or gating, i.e. not by contact-making and -breaking
08Modifications for protecting switching circuit against overcurrent or overvoltage
081without feedback from the output circuit to the control circuit
0814by measures taken in the output circuit
Applicants
  • ROMPOWER TECHNOLOGY HOLDINGS, LLC [US]/[US]
Inventors
  • JITARU, Ionel
Agents
  • GALVANI, Thomas, W.
Priority Data
16/503,43203.07.2019US
16/775,96729.01.2020US
62/841,69401.05.2019US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) HIGH EFFICIENCY PASSIVE CLAMP
(FR) CALAGE PASSIF À GRANDE EFFICACITÉ
Abstract
(EN)
A circuit having primary and secondary sides includes a flyback converter having an input voltage source (Vin, 410 (26)) and a transformer with primary and secondary windings. A main switch is in series with the primary winding. A passive clamp circuit includes a clamp diode (Dcl, 470), a clamp capacitor (Cr, 472), and an auxiliary circuit (480) including first (D1, 474) and second rectifiers (D2, 476) in series with each other and with an electronic component (VB) configured to store electromagnetic energy. The electronic component (VB) has first and second terminals. A cathode of the first rectifier (D1, 474) is connected with the passive clamp circuit, and an anode of the first rectifier (D1, 474) is connected to the second terminal of electronic component. An anode of the second rectifier (D2, 476) is connected with the cathode of the first rectifier (D1, 474), and a cathode of the second rectifier (D2, 476) is connected with the first terminal of the electronic component (VB).
(FR)
Circuit ayant des côtés primaire et secondaire comprenant un convertisseur indirect ayant une source de tension d'entrée (Vin, 410 (26)) et un transformateur ayant des enroulements primaire et secondaire. Un commutateur principal est en série avec l'enroulement primaire. Un circuit de calage passif comprend une diode de calage (Dcl, 470), un condensateur de calage (Cr, 472) et un circuit auxiliaire (480) comprenant des premier (D1, 474) et second (D2, 476) redresseurs en série l'un avec l'autre et avec un composant électronique (VB) conçu pour stocker de l'énergie électromagnétique. Le composant électronique (VB) comprend des première et seconde bornes. Une cathode du premier redresseur (D1, 474) est connectée au circuit de calage passif, et une anode du premier redresseur (D1, 474) est connectée à la seconde borne du composant électronique. Une anode du second redresseur (D2, 476) est connectée à la cathode du premier redresseur (D1, 474), et une cathode du second redresseur (D2, 476) est connectée à la première borne du composant électronique (VB).
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