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1. (WO2018163524) ELECTRIC WORK VEHICLE
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Pub. No.: WO/2018/163524 International Application No.: PCT/JP2017/042119
Publication Date: 13.09.2018 International Filing Date: 23.11.2017
IPC:
G01R 31/02 (2006.01) ,B60L 3/00 (2006.01) ,B60L 11/12 (2006.01) ,H02M 7/48 (2007.01)
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31
Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
02
Testing of electric apparatus, lines, or components for short-circuits, discontinuities, leakage, or incorrect line connection
B PERFORMING OPERATIONS; TRANSPORTING
60
VEHICLES IN GENERAL
L
PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
3
Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration, power consumption
B PERFORMING OPERATIONS; TRANSPORTING
60
VEHICLES IN GENERAL
L
PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
11
Electric propulsion with power supplied within the vehicle
02
using engine-driven generators
12
with additional electric power supply, e.g. accumulator
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
Applicants: HITACHI CONSTRUCTION MACHINERY CO., LTD.[JP/JP]; 16-1, Higashiueno 2-chome, Taito-ku, Tokyo 1100015, JP
Inventors: ISHIDA Toshihiko; JP
Agent: HIROWA PATENT FIRM; 4F., Nishishinjuku Koide Bldg., 1-3, Nishishinjuku 3-chome, Shinjuku-ku, Tokyo 1600023, JP
Priority Data:
2017-04591810.03.2017JP
Title (EN) ELECTRIC WORK VEHICLE
(FR) VÉHICULE ÉLECTRIQUE DE TRAVAUX
(JA) 電動式作業車両
Abstract:
(EN) A dump truck (1) is provided with a ground-fault detection device (22) for detecting a ground-fault detection voltage V0, which is a difference between a detection voltage Vp between a positive electrode line (18A) of a DC bus bar (18) and a neutral point N and a detection voltage Vn between the neutral point N and a negative electrode line (18B) of the DC bus bar (18), and detecting a ground fault on the basis of the ground-fault detection voltage V0. The ground-fault detection device (22) comprises: a DC component determination unit (25) for extracting a DC component VLdc from the ground-fault detection voltage V0, and determining a ground fault on the basis of the DC component VLdc; and drive frequency component determination units (26) and (27) for extracting drive frequency components VLiR and VLiL for inverters (17R) and (17L) from the ground-fault detection voltage V0, and determining a ground fault on the basis of the drive frequency components VLiR and VLiL.
(FR) L'invention concerne un camion-benne (1) muni d'un dispositif (22) de détection de défaut de mise à la terre servant à détecter une tension V0 de détection de défaut de mise à la terre, qui est une différence entre une tension Vp de détection entre une ligne (18A) d'électrode positive d'une barre omnibus (18) à courant continu et un point neutre N et une tension Vn de détection entre le point neutre N et une ligne (18B) d'électrode négative de la barre omnibus (18) à courant continu, et à détecter un défaut de mise à la terre d'après la tension V0 de détection de défaut de mise à la terre. Le dispositif (22) de détection de défaut de mise à la terre comporte: une unité (25) de détermination de composante continue servant à extraire une composante continue VLdc de la tension V0 de détection de défaut de mise à la terre, et à déterminer un défaut de mise à la terre d'après la composante continue VLdc; et des unités (26) et (27) de détermination de composantes à fréquences d'attaque servant à extraire des composantes VLiR et VLiL à des fréquences d'attaque d'onduleurs (17R) et (17L) de la tension V0 de détection de défaut de mise à la terre, et à déterminer un défaut de mise à la terre d'après les composantes VLiR et VLiL aux fréquences d'attaque.
(JA) ダンプトラック(1)は、直流母線(18)の正極ライン(18A)と中性点Nとの間の検出電圧Vpと、中性点Nと直流母線(18)の負極ライン(18B)との間の検出電圧Vnとの差分からなる地絡検出電圧V0を検出し、地絡検出電圧V0に基づいて地絡を検出する地絡検出装置(22)とを備える。地絡検出装置(22)は、地絡検出電圧V0から直流成分VLdcを抽出し、直流成分VLdcに基づいて地絡を判定する直流成分判定部(25)と、地絡検出電圧V0からインバータ(17R),(17L)の駆動周波数成分VLiR,VLiLを抽出し、駆動周波数成分VLiR,VLiLに基づいて地絡を判定する駆動周波数成分判定部(26),(27)と、を有する。
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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, 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)