WO2009112372A1 - Véhicule, en particulier véhicule sur rail, comprenant une unité de transformation et procédé pour transformer une tension - Google Patents

Véhicule, en particulier véhicule sur rail, comprenant une unité de transformation et procédé pour transformer une tension Download PDF

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Publication number
WO2009112372A1
WO2009112372A1 PCT/EP2009/052263 EP2009052263W WO2009112372A1 WO 2009112372 A1 WO2009112372 A1 WO 2009112372A1 EP 2009052263 W EP2009052263 W EP 2009052263W WO 2009112372 A1 WO2009112372 A1 WO 2009112372A1
Authority
WO
WIPO (PCT)
Prior art keywords
inverter
voltage
capacitor
vehicle
converter
Prior art date
Application number
PCT/EP2009/052263
Other languages
German (de)
English (en)
Inventor
Bernhard HÖSCHELER
Jürgen SCHURR
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP09719623A priority Critical patent/EP2252478A1/fr
Publication of WO2009112372A1 publication Critical patent/WO2009112372A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—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
    • B60L9/00—Electric propulsion with power supply external to the vehicle
    • B60L9/005—Interference suppression
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—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
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/02—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles characterised by the form of the current used in the control circuit
    • B60L15/06—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles characterised by the form of the current used in the control circuit using substantially sinusoidal ac
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/505—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M7/515—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M7/521—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—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
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • Vehicle in particular rail vehicle, with a converter ⁇ unit and method for converting a voltage
  • the invention relates to a vehicle having the features according to the preamble of claim 1.
  • Vehicles of this type are, for example, ⁇ BB Rh2016, ME26 and ER20 diesel locomotives.
  • ⁇ BB Rh2016 ⁇ BB Rh2016
  • ME26 ⁇ BB Rh2016
  • ER20 diesel locomotives
  • FIG. 1 and 7 such a marked with the Be ⁇ reference numbers 5 vehicle may include a DC ⁇ supply 6, a track voltage intermediate circuit 10, a device connected to the DC voltage intermediate circuit converter unit 15, and a device connected to the transducer unit 15 collecting ⁇ rail 20th
  • the busbar 20 may be, for example, a Werner-on-semiconductor (S-T) with the electrical load of the vehicle 5 or electrical consumers on vehicles that are connected via the Switzerlandsammeischiene with the vehicle 5, are supplied with electric power.
  • the transducer unit 15 comprises two Wandlerein ⁇ gear terminals 25 and 30 and two transducer output terminals 35 and 40 and is for converting an input side anlie ⁇ constricting DC voltage Udc into alternating voltage Uac suited.
  • the converter unit 15 includes an inverter 45 equipped with two inverter input terminals 50 and 55 and two inverter output terminals 60 and 65.
  • the two inverter input terminals 50 and 55 bil ⁇ the converter input terminals 25 and 30 of the converter unit 15.
  • a low-pass device 70 is present, the input side indirectly with the two inverter output ⁇ outlets 60 and 65 is in communication and the output side, the two converter output terminals 35th and 40 of the wall lergnac 15 forms.
  • the invention has the object of specifying a vehicle at ⁇ having a lower weight and lower herstel ⁇ development costs than the prior art vehicles as described above.
  • the invention provides that the Wegpassfil ⁇ ter realized at least one capacitor, which is presence closed with its one capacitor connected to the one of the two inverter input terminals and with its other Kondensa ⁇ gate terminal of one of the two converter output terminals.
  • a significant advantage of the vehicle according to the invention is the fact that in this the transformer in the Converter unit can be omitted.
  • a transformer is relatively large in the field of rail vehicle technology in general and difficult, because the operating frequencies are in railways quite small ( ⁇ 100 Hz), so that the transformer increases the manufacturing cost of the vehicle and the weight of collected ⁇ Lich.
  • the vehicle according to the invention can be omitted in the converter unit - due to the present invention provided feedback by the inventively provided capacitor - in contrast to the vehicles according to the prior art on a transformer; because the task of preventing a jump of the potential is fulfilled by the inventive feedback without a transformer.
  • the low-pass filter device comprises two capacitors, one of which is connected to one of the two inverter input terminals with its one capacitor terminal and to one of the two converter output terminals with its other capacitor terminal, and from de ⁇ NEN another with its one capacitor terminal connected to one or the other of the two inverter input terminals and with its other capacitor terminal connected to the other of the two converter output terminals.
  • the low-pass filter device preferably has two filter throttles, one of which is connected with its one throttle connection to one inverter output terminal and with its other throttle connection to the one converter output terminal, and of which the other with ih ⁇ rem a throttle connection to the other Inverter output port and with its other throttle port connected to the other converter output port.
  • the capacitors have two functions: on the one hand, they prevent the potential from jumping, and on the other hand they filter interference frequencies together with the filter inductors so that they can not reach the output of the converter unit.
  • the limit frequency of the two low-pass filters is preferably in each case RESIZE ⁇ SSER than the fundamental frequency of the output voltage of the inverter and / or in each case smaller than a whilrtaktfre- frequency at which the inverter is operated.
  • the cutoff frequency of both low passes can be the same, for example.
  • the converter unit may also have at least one additional converter output terminal in addition to the two converter output terminals mentioned.
  • spreader ⁇ accordingly comprises in this case also, the inverter preferably at least one additional inverter output terminal.
  • the low-pass filter means comprises at least one additional capacitor with one of its capacitor terminal at any of the two inverter input terminals and a converter output terminal and with its other capacitor terminal to the at least ei ⁇ NEN additional transformer output terminal connected.
  • the Tiefpassfil ⁇ ter comprises in addition to the two filter chokes an additional filter inductor, the at least terausgangsan gleich with its one throttle connection to an additional Nerich- and connected with its other throttle connection to the at least one additional transducer output terminal ,
  • one of the two converter input terminals can be soft grounded.
  • the two converter input terminals can be soft grounded.
  • Transducer input terminals indirectly or directly connected to a DC voltage source the output side is soft grounded.
  • the DC voltage source may for example comprise a Burn ⁇ voltage motor (for. Example, diesel engine), a related with the engine generator and a downstream of the generator converter.
  • the vehicle may also be an AC-powered vehicle, in which the DC voltage source comprises a power converter, which is connected upstream of the converter unit.
  • a method for converting a DC voltage applied on the input side into an alternating voltage is considered, in which the DC voltage with a
  • Inverter is then reversed and then filtered and the reversed and filtered voltage is output to the converter output terminals.
  • the voltage potential at at least one of the converter output ⁇ outlets is fed back with a capacitor to a soft grounded inverter input terminal.
  • the voltage potential of each of the converter ⁇ output terminals is fed back with a capacitor to an indirectly or directly soft grounded inverter input terminal.
  • FIG. 2 shows a first embodiment of an inventive vehicle in which a rear Kopp ⁇ development of a converter output terminal is carried to a converter input terminal by a single capacitor
  • FIG. 3 shows a second embodiment of a manure vehicle according OF INVENTION ⁇ , wherein the Wandlerein ⁇ unit comprises two converter output terminals which are coupled back to different transducer input terminals,
  • Figure 4 shows a third embodiment of a manure vehicle according OF INVENTION ⁇ , in which the two wall ⁇ lerausgangsan usually are fed back to a single inverter input terminal and to a single transformer input port,
  • Figure 5 shows a fourth embodiment of a manure vehicle according OF INVENTION ⁇ , wherein the Wandlerein- has three converter output terminals, of which a single is fed back to the converter input, and
  • Figure 6 shows a fifth embodiment of a manure vehicle according OF INVENTION ⁇ , each having all converter output terminals are fed back to the input side of the converter unit.
  • the vehicle 5 - which may be, for example, a locomotive, for example, a diesel locomotive - a DC intermediate circuit 10 which is connected via two resistors Rl and R2 high impedance to ground and thus soft grounded.
  • the DC voltage intermediate circuit 10 nor a DC link capacitor Czk.
  • the DC voltage intermediate circuit 10 is connected to two Wandlerein ⁇ -out terminals 25 and 30 of a converter unit 15, the input side having an inverter 45th
  • the two inverter input terminals 50 and 55 are connected to the two converter input terminals 25 and 30.
  • the inverter 45 On the output side, the inverter 45 with its two inverter output terminals 60 and 65 is connected to a low-pass filter device 70.
  • the low-pass filter device 70 is formed by two filter inductors Ll and L2 and a capacitor Cl, with its one capacitor terminal 80 to one of the two Inverter input terminals 55 and thus to one of the two converter input terminals 25 and and connected with its other capacitor terminal 85 to one of the two Wandleraus ⁇ gangsan say 35.
  • the other input terminal 40 is in Wandleraus- Verbin ⁇ dung to the inductor L2.
  • the function of the capacitor Cl is a jumping the potential of the DC voltage intermediate circuit 10, which during operation of the converter unit 15 - as already mentioned it ⁇ - is soft grounded to prevent. Due to the Ia- dung storage or charge-buffering effect of the capacitor Cl, the potential can jump on the DC voltage intermediate circuit 10 to either of the two transformer connections 25 or 30 directly applicable to ground potential, even if one of the transducer output terminals would the be set to ground potential 35 or 40 at ⁇ ; because by the capacitor Cl is an appropriate Potentialpuff réelle, means preventing cracking ⁇ changed ensured.
  • FIG. 3 shows a second exemplary embodiment of a vehicle.
  • the low pass filter device 70 comprises two capacitors, namely the capacitor Cl and a capacitor C2.
  • the capacitor C2 is connected with its one capacitor terminal 90 to the walls ⁇ ren inverter input terminal 50 and at the other capacitor terminal 95 to the converter output terminal 40th
  • FIG. 4 shows a third exemplary embodiment of a vehicle.
  • the second capacitor C2 with its one capacitor terminal 90 is not connected to the other inverter input terminal 50 or the second capacitor C2
  • FIG. 5 shows an exemplary embodiment of a vehicle in which the busbar 20 is designed for three-phase or three-pole operation.
  • the filter device 70 a total of three filter chokes or inductors Ll, L2, L3, which are associated with the three Wandleraus ⁇ -out terminals 35, 40 to 100.
  • the capacitor Cl By the capacitor Cl, in turn, jumping of the potential of the DC voltage intermediate circuit 10 is avoided to ground when the inverter 45 is put into operation.
  • FIG. 6 shows a fifth exemplary embodiment of a vehicle.
  • the converter unit 15 is the output side of a three-phase drive Be ⁇ and designed to be connected to a three-phase busbar 20th
  • the filter inlet ⁇ direction 70 with a total of three capacitors Cl, C2, C3 permitted from ⁇ , each having a feedback of the three Wandleraus- gangsan whatever 35, 40 and 100 on one or more of the converter input terminals 25 and 30 or one or more of the inverter input terminals 50 and 55 effect.
  • the function of the three capacitors Cl, C2 and C3 is to avoid jumping of the potential of the intermediate circuit currency ⁇ rend the operation of the inverter 45th
  • the described circuit topology of the filter device 70 ensures that the potential of the DC voltage intermediate circuit 70 to ground during operation of the
  • Inverter 45 does not jump, but at most only oscillates.
  • the oscillation essentially contains the frequency of the voltage on the busbar 20 in the case of a single-phase busbar or three times this frequency in the case of a three-phase busbar and in both cases still a relatively small voltage component with the clock frequency of the inverter 45.
  • the filter throttles L1, L2, L3 provided in the low-pass filter device 70 can be made smaller and lighter than those associated with the prior art
  • the filter chokes Ll, L2 enable in the case of a single-phase busbar 20 in addition, to allow order ⁇ switching option of alternating voltage to direct current (AC / DC) without additional hardware, in which the frequency on the busbar (eg Switzerlandsam-. melschiene) is changed by a corresponding control of the Wech ⁇ selrichters 45 to 0 Hz.
  • the weight of the vehicle or rail vehicle is less than the weight of the vehicle or rail vehicle according to figure 1 with the same functionality as possible to dispense with the re ⁇ tively heavy transformer 75 miles.
  • the weight reduction is, for example, at a Be ⁇ measurement performance of the converter unit of 400 kVA in the range between 500 kg and 1000 kg.
  • the omission of the transformer 75 shown in Figure 1 can also be used to reduce the length of the vehicle 5 or otherwise use the unused installation space, for example, for an enlargement of the fuel tank, if it is the vehicle 5, for example, a diesel locomotive han ⁇ delt.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Inverter Devices (AREA)

Abstract

L'invention concerne un véhicule (5), en particulier un véhicule sur rail, avec un circuit intermédiaire (10) de tension continue et une unité de transformation (15) raccordée au circuit intermédiaire de tension continue en vue de l'alimentation en énergie du véhicule ou en vue de l'alimentation en énergie d'autres véhicules qui sont reliés avec le véhicule par l'intermédiaire d'une barre collectrice électrique, l'unité de transformation destinée à la transformation d'une tension continue (Udc) apparaissant côté entrée en une tension alternative (Uac) étant appropriée et comprenant : un onduleur (45) avec deux branchements d'entrée d'onduleur (50, 55) et deux branchements de sortie d'onduleur (60, 65) et un dispositif de filtrage passe-bas (70), qui est raccordé côté entrée directement ou indirectement aux deux branchements de sortie d'onduleur et forme côté sortie les deux branchements de sortie de transformateur de l'unité de transformateur au niveau desquels la tension alternative chute. Il est prévu selon l'invention que le dispositif de filtre passe-bas présente au moins un condensateur (C1), qui est raccordé avec son premier raccordement de condensateur (80) au niveau du premier des deux branchements d'entrée d'onduleur (55) et avec son autre branchement de condensateur (85) au niveau d'un deuxième des deux branchements de sortie de transformateur (35).
PCT/EP2009/052263 2008-03-10 2009-02-26 Véhicule, en particulier véhicule sur rail, comprenant une unité de transformation et procédé pour transformer une tension WO2009112372A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09719623A EP2252478A1 (fr) 2008-03-10 2009-02-26 Vehicule, en particulier vehicule sur rail, comprenant une unite de transformation et procede pour transformer une tension

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008013625.5 2008-03-10
DE102008013625A DE102008013625A1 (de) 2008-03-10 2008-03-10 Fahrzeug, insbesondere Schienenfahrzeug, mit einer Wandlereinheit und Verfahren zum Umwandeln einer Spannung

Publications (1)

Publication Number Publication Date
WO2009112372A1 true WO2009112372A1 (fr) 2009-09-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/052263 WO2009112372A1 (fr) 2008-03-10 2009-02-26 Véhicule, en particulier véhicule sur rail, comprenant une unité de transformation et procédé pour transformer une tension

Country Status (3)

Country Link
EP (1) EP2252478A1 (fr)
DE (1) DE102008013625A1 (fr)
WO (1) WO2009112372A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021214405B4 (de) 2021-12-15 2023-11-16 Zf Friedrichshafen Ag Wechselrichtervorrichtung für ein Fahrzeug und Verfahren zum Betreiben einer Wechselrichtervorrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62114401A (ja) * 1985-11-13 1987-05-26 Mitsubishi Electric Corp 電気鉄道車両の接地回路
EP0371427A2 (fr) * 1988-11-29 1990-06-06 Hitachi, Ltd. Appareil pour empêcher l'interférence inductive dans une voiture électrique
EP0899859A2 (fr) 1997-08-23 1999-03-03 Asea Brown Boveri AG Onduleur avec circuit intermédiaire de tension
EP1336528A2 (fr) * 2002-02-19 2003-08-20 Bae Systems Controls, Inc. Système de détection des défault de terre et méthode
US7248057B1 (en) 2006-03-21 2007-07-24 General Electric Company Method, apparatus and computer-readable code for detecting on the fly an incipient ground fault in an electrical propulsion system of a locomotive

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2698582B2 (ja) * 1987-04-14 1998-01-19 株式会社東芝 パルス幅変調インバータ
JP2903950B2 (ja) * 1993-06-22 1999-06-14 株式会社日立製作所 電力変換装置
DE102004037446B4 (de) * 2004-08-02 2006-11-02 Conergy Ag Trafoloser Wechselrichter für solare Netzeinspeisung
DE102006033046A1 (de) * 2006-07-14 2008-01-17 Bombardier Transportation Gmbh Anordnung und Verfahren zum Versorgen von Verbrauchern in einem Schienenfahrzeug

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62114401A (ja) * 1985-11-13 1987-05-26 Mitsubishi Electric Corp 電気鉄道車両の接地回路
EP0371427A2 (fr) * 1988-11-29 1990-06-06 Hitachi, Ltd. Appareil pour empêcher l'interférence inductive dans une voiture électrique
EP0899859A2 (fr) 1997-08-23 1999-03-03 Asea Brown Boveri AG Onduleur avec circuit intermédiaire de tension
EP1336528A2 (fr) * 2002-02-19 2003-08-20 Bae Systems Controls, Inc. Système de détection des défault de terre et méthode
US7248057B1 (en) 2006-03-21 2007-07-24 General Electric Company Method, apparatus and computer-readable code for detecting on the fly an incipient ground fault in an electrical propulsion system of a locomotive

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2252478A1 *

Also Published As

Publication number Publication date
EP2252478A1 (fr) 2010-11-24
DE102008013625A1 (de) 2009-10-08

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