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1. (WO2019026398) CURRENT DETECTION CIRCUIT
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Pub. No.: WO/2019/026398 International Application No.: PCT/JP2018/019967
Publication Date: 07.02.2019 International Filing Date: 24.05.2018
IPC:
H02M 3/28 (2006.01)
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
3
Conversion of dc power input into dc power output
22
with intermediate conversion into ac
24
by static converters
28
using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
Applicants:
ローム株式会社 ROHM CO., LTD. [JP/JP]; 京都府京都市右京区西院溝崎町21番地 21, Saiin Mizosaki-Cho, Ukyo-Ku, Kyoto-Shi, Kyoto 6158585, JP
Inventors:
佐藤 好則 SATO Yoshinori; JP
名手 智 NATE Satoru; JP
Agent:
特許業務法人 佐野特許事務所 SANO PATENT OFFICE; 大阪府大阪市中央区天満橋京町2-6天満橋八千代ビル別館5F 5F, Tenmabashi-Yachiyo Bldg. Bekkan, 2-6, Tenmabashi-Kyomachi, Chuo-Ku, Osaka-Shi, Osaka 5400032, JP
Priority Data:
2017-14823731.07.2017JP
Title (EN) CURRENT DETECTION CIRCUIT
(FR) CIRCUIT DE DÉTECTION DE COURANT
(JA) 電流検出回路
Abstract:
(EN) A current limiter 200 (corresponding to an example of a current detection circuit) has a comparator 210 and a variable delay unit 220. The comparator 210 switches a comparison signal OCP from a low level to a high level when the current to be monitored, which flows through an output switch, reaches a predetermined threshold value (in the present figure, when a sense voltage Vcs reaches an overcurrent detection voltage Vocp). The variable delay unit 220 measures a first time T1 from when the output switch turns on by SET = H until when the comparison signal OCP switches to the high level and delays the comparison signal OCP by a second time T2 (= K·T12) proportional to the square of the first time T1 to generate an overcurrent detection signal Sc. The variable delay unit 220 includes a first timer 223 for measuring the first time T1 and a second timer 224 for generating the overcurrent detection signal Sc by delaying the comparison signal OCP by the second time T2.
(FR) Un limiteur de courant 200 (correspondant à un exemple de circuit de détection de courant) comporte un comparateur 210 et une unité de retard variable 220. Le comparateur 210 commute un signal de comparaison OCP d'un niveau bas à un niveau haut lorsque le courant à surveiller, qui circule à travers un commutateur de sortie, atteint une valeur de seuil prédéterminée (dans la présente figure, lorsqu'une tension de détection Vcs atteint une tension de détection de surintensité Vocp). L'unité de retard variable 220 mesure un premier temps T1 à partir du moment où le commutateur de sortie s'active par SET = H jusqu'au moment où le signal de comparaison OCP passe au niveau haut et retarde le signal de comparaison OCP d'un second temps T2 (= K·T12) proportionnel au carré du premier temps T1 pour générer un signal de détection de surintensité Sc. L'unité de retard variable 220 comprend un premier temporisateur 223 permettant de mesurer le premier temps T1 et un second temporisateur 224 permettant de générer le signal de détection de surintensité Sc en retardant le signal de comparaison OCP du second temps T2.
(JA) 電流リミッタ200(=電流検出回路の一例に相当)は、コンパレータ210と可変遅延部220を有する。コンパレータ210は、出力スイッチに流れる監視対象電流が所定の閾値に達したとき(本図では、センス電圧Vcsが過電流検出電圧Vocpに達したとき)に、比較信号OCPをローレベルからハイレベルに切り替える。可変遅延部220は、SET=Hにより出力スイッチがオンしてから比較信号OCPがハイレベルに切り替わるまでの第1時間T1を測定し、第1時間T1の二乗に比例する第2時間T2(=K・T1)だけ比較信号OCPを遅延して過電流検出信号Scを生成する。なお、可変遅延部220は、第1時間T1を測定する第1タイマ223と、第2時間T2だけ比較信号OCPを遅延して過電流検出信号Scを生成する第2タイマ224と、を含む。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)