DE3029216A1 - Tram system using over head current supply - energises AC tram drive via transformer and rectifier providing same voltage as auxiliary battery supply - Google Patents

Tram system using over head current supply - energises AC tram drive via transformer and rectifier providing same voltage as auxiliary battery supply

Info

Publication number
DE3029216A1
DE3029216A1 DE19803029216 DE3029216A DE3029216A1 DE 3029216 A1 DE3029216 A1 DE 3029216A1 DE 19803029216 DE19803029216 DE 19803029216 DE 3029216 A DE3029216 A DE 3029216A DE 3029216 A1 DE3029216 A1 DE 3029216A1
Authority
DE
Germany
Prior art keywords
tram
network
overhead line
omnibus
vehicles
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
DE19803029216
Other languages
German (de)
Inventor
Helmut Dr.-Ing.e.h. 4300 Essen Meysenburg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RWE AG
Original Assignee
Rheinisch Westfaelisches Elektrizitaetswerk AG
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 Rheinisch Westfaelisches Elektrizitaetswerk AG filed Critical Rheinisch Westfaelisches Elektrizitaetswerk AG
Priority to DE19803029216 priority Critical patent/DE3029216A1/en
Publication of DE3029216A1 publication Critical patent/DE3029216A1/en
Withdrawn legal-status Critical Current

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
    • B60L9/02—Electric propulsion with power supply external to the vehicle using dc motors
    • B60L9/14—Electric propulsion with power supply external to the vehicle using dc motors fed from different kinds of power-supply lines
    • 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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/53—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells in combination with an external power supply, e.g. from overhead contact lines
    • 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
    • B60L2200/18—Buses
    • 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
    • B60L2200/36—Vehicles designed to transport cargo, e.g. trucks
    • 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
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Landscapes

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

Abstract

The trams (3) each incorporate an electric propulsion drive (4) which can be selectively coupled to supply batteries (5) or to the overhead current line (1). The latter is coupled to the AC network, with the current obtained from the current take-off mounted on the top of the tram (3) fed to the DC drive (4) via a transformer (6) and a rectifier (7), to provide a DC voltage corresp. to that provided by the batteries (5). A switch (8) is provided between the drive (4) and the batteries (5), with a second switch (9) between the current take-off (2) and the transformer (6). The batteries (5) can be recharged from the overhead line (1) when waiting and from the drive (4) acting as a generator during braking.

Description

Die Erfindung bezieht sich gattungsgemäß auf ein System ausThe invention relates generically to a system

Omnibus-Fahrzeugen, Oberleitungsnetz und Stromabnehmern zwischen Oberleitungsnetz und Omnibus-Fahrzeugen, wobei die Omnibus-Fahrzeuge einen elektromotorischen Antrieb aufweisen, der wahlweise an das Ober leitungsnetz und/oder an eine mitgeführte Akkumulatorenbatterie anschaltbar ist. Im Rahmen eines solchen Systems ist das Omnibus-Fahrzeug für den sog. Duo-Betrieb eingerichtet und damit auch dort einsetzbar, wo ein Oberleitungsnetz aus wirtschaftlichen Gründen nicht installiert ist. Der Ausdruck Omnibus-Fahrzeug umfaßt im Rahmen der Erfindung auch antriebstechnisch entsprechend ausgebildete Straßenfahrzeuge für den Gütertransport, Zugmaschinen u. dgl.Omnibus vehicles, overhead line network and pantographs between the overhead line network and omnibus vehicles, whereby the omnibus vehicles have an electric motor drive have, optionally to the overhead line network and / or to an accompanying accumulator battery can be switched on. As part of such a system, the omnibus vehicle is for the So-called duo operation set up and can therefore also be used where there is an overhead line network is not installed for economic reasons. The term omnibus vehicle Within the scope of the invention also includes appropriately designed drive technology Road vehicles for the transport of goods, tractors and the like.

Im Rahmen der (aus der Praxis) bekannten Systeme wird das Oberleitungsnetz mit Gleichstrom versorgt. Der Gleichstrom wird zwar letzten Endes dem Netz eines Elektrizitätsversorgungsunternehmens (EVU-Netz) entnommen, jedoch nur über besondere Umform- und/oder Gleichrichterstationen für die Umformung von Wechselstrom bzw. Drehstrom in Gleichstrom Der Gleichstromantrieb der Omnibus-Fahrzeuge empfiehlt sich bekanntlich aus antriebstechnischen Gründen, wobei zumeist die günstige Charakteristik eines Hauptstrommotors, wenn auch in Kombination mit Zusatzschaltungen, ausgenutzt wird. Andererseits ist dabei eine verhältnismäßig hohe Fahrdrahtspannung des Oberleitungsnetzes erforderlich. Im Ergebnis ist die Fahrdrahtspannung wesentlich höher als sie für den Batteriebetrieb zweckmäßig ist.Within the framework of the systems known (from practice), the overhead line network supplied with direct current. In the end, direct current becomes part of the network Electricity supply company (EVU network) taken, but only through special Conversion and / or rectifier stations for converting alternating current or Three-phase current in direct current The direct current drive of omnibus vehicles is recommended is known for reasons of drive technology, with mostly the favorable characteristics of a main current motor, albeit in combination with additional circuits will. On the other hand, there is a relatively high contact wire voltage in the overhead line network necessary. As a result, the contact wire voltage is much higher than it is for battery operation is appropriate.

Das macht komplizierte elektrotechnische Maßnahmen erforderlich und erschwert folglich die Durchführung des Duo-Betriebes mit Wechsel zwischen Oberleitungsnetzspeisung und Akkumulatorenbatteriespeisung. Im übrigen kann das Oberleitungsnetz, wie bereits angedeutet, nicht ohne aufwendige Umformung bzw. Gleichrichtung aus einem für Wechselstrom oder Drehstrom ausgelegten EVU-Netz gespeist werden.This makes complicated electrotechnical measures necessary and consequently complicates the implementation of the duo operation with a change between overhead line network feed and accumulator battery supply. Otherwise, the overhead line network can, as already indicated, not without complex reshaping or rectification the end a utility grid designed for alternating current or three-phase current.

Demgegenüber liegt der Erfindung die Aufgabe zugrunde, das gattungsgemäße System so weiter auszubilden, daß der Duo-Betrieb ohne die beschriebenen Spannungsprobleme im Wechsel oder auch im Parallelbetrieb zwischen Oberleitungsnetzspeisung und Akkumulatorenbatteriespeisung möglich ist.In contrast, the invention is based on the object of the generic Further develop the system so that the duo operation without the voltage problems described alternately or in parallel operation between overhead line network supply and accumulator battery supply is possible.

Zur Lösung dieser Aufgabe lehrt die Erfindung, daß der elektromotorische Antrieb der Omnibus-Fahrzeuge für die Akkumulatorenbatterie-Gleichspannung ausgelegt ist, daß das Oberleitungsnetz als Wechselstromnetz ausgeführt und an ein EVU-Wechselstromnetz angeschlossen ist, und daß den elektromotorischen Antrieb auf jedem Omnibus-Fahrzeug ein Transformator sowie ein Gleichrichter für die Umwandlung der Netzspannung in eine dem elektromotorischen Antrieb (damit der Akkumulatorenbatterie-Gleichspannung) entsprechende Spannung zugeordnet sind. - Im Rahmen der Erfindung liegt es, in Fahrpausen die Akkumulatorenbatterie aus der Fahrleitung nachzuladen. Beim Bremsen kann der Elektromotor als Generator arbeiten und Energie in die Akkumulatorenbatterie zurückspeisen.To solve this problem, the invention teaches that the electromotive Drive of the omnibus vehicles designed for the accumulator battery DC voltage is that the overhead line network is designed as an alternating current network and connected to an EVU alternating current network is connected, and that the electric motor drive on every bus vehicle a transformer and a rectifier for converting the mains voltage into one of the electromotive drive (thus the accumulator battery DC voltage) corresponding voltage are assigned. - It is within the scope of the invention to take breaks in driving to recharge the accumulator battery from the contact line. When braking, the The electric motor works as a generator and feeds energy back into the accumulator battery.

Erfindungsgemäß wird also der Fahrdraht mit Wechselstrom von Netzfrequenzen betrieben. Die Sekundärspannung des auf dem Omnibus-Fahrzeug installierten Transformators kann ohne weiteres so gewählt werden, wie es für den kombinierten Betrieb zweckmäßig erscheint. Das Gewicht des Transformators und des Gleichrichters lassen sich niedrig halten, da diese Aggregate nur für die Leistung des speziellen Omnibus-Fahrzeuges auszulegen sind.According to the invention, therefore, the contact wire is supplied with alternating current of mains frequencies operated. The secondary voltage of the transformer installed on the bus vehicle can easily be selected as appropriate for combined operation appears. The weight of the transformer and the rectifier can be kept low because these units are only used for the performance of the special bus vehicle are to be interpreted.

Darüber hinaus kann das Oberleitungsnetz überall aus dem ohnehin vorhandenen Wechselstromnetz bzw. Drehstromnetz gespeist werden.In addition, the overhead line network can be used anywhere from the already existing AC network or three-phase network are fed.

Folglich sind für das Ober leitungsnetz aufwendige Umform- und/oder Gleichstromstationen nicht erforderlich, so daß auch für relativ kurze Fahrstrecken Oberleitungsnetze installiert werden können.Consequently, complex forming and / or for the overhead line network DC stations are not required, so that even for relatively short journeys Catenary networks can be installed.

In Sonderfällen kann die Fahrdrahtspannung, z. B. bei längeren Strecken mit hohem Spannungsabfall, unter Verwendung entsprechend ausgelegter Transformatoren auch höher gewählt werden (z. B.In special cases the contact wire voltage, e.g. B. for longer distances with high voltage drop, using appropriately designed transformers can also be chosen higher (e.g.

looo Volt).looo volts).

Im folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung ausführlicher erläutert.In the following the invention is based on only one embodiment Illustrative drawing explained in more detail.

Die einzige Figur zeigt das Schema des erfindungsgemäßen Systems mit dem Grundriß eines Omnibus-Fahrzeuges.The single figure shows the scheme of the system according to the invention the layout of a bus vehicle.

In dem Schema erkennt man zunächst den Fahrdraht 1 eines Oberleitungsnetzes mit Stromabnehmer 2 zwischen Ober leitungsnetz 1 und Omnibus-Fahrzeug 3. Es versteht sich von selbst, daß der Fahrdraht 1 des Oberleitungsnetzes im allgemeinen oberhalb des Omnibus-Fahrzeuges 3 verläuft und der Stromabnehmer 2 entsprechend über dem Dach des Omnibus-Fahrzeuges 3 angeordnet ist.In the diagram, one can initially see the contact wire 1 of a catenary network with pantograph 2 between overhead line network 1 and bus vehicle 3. It understands itself that the contact wire 1 of the catenary network is generally above of the bus 3 runs and the pantograph 2 accordingly over the Roof of the bus vehicle 3 is arranged.

Das Omnibus-Fahrzeug 3 besitzt einen elektromotorischen Antrieb mit Elektromotor 4, der für die Gleichspannung der mitgeführten Akkumulatorenbatterie 5 ausgelegt ist. Das Oberleitungsnetz ist ein Wechselstromnetz und an ein EVU-Wechselstromnetz angeschlossen. Dem Elektromotor 4 ist ein Transformator 6 sowie ein Gleichrichter 7 für die Umwandlung der Netzspannung in eine dem elektromotorischen Antrieb und damit der Akkumulatorenbatterie- Gleichspannung entsprechende Spannung zugeordnet. Zwischen der Akkumulatorenbatterie 5 und dem Elektromotor 4 befindet sich eine Schaltvorrichtung 8, eine Schaltvorrichtung 9 ist außerdem zwischen Stromabnehmer 2 und Transformator 6 angeordnet. Im übrigen entsprechen die weiterhin erforderlichen schaltungstechnischen und steuerungstechnischen Maßnahmen den Stand der Technik, so daß auf die Darstellung von Einzelheiten insoweit verzichtet werden konnte.The omnibus vehicle 3 has an electric motor drive Electric motor 4 for the DC voltage of the accumulator battery carried 5 is designed. The overhead line network is an alternating current network and connected to an EVU alternating current network connected. The electric motor 4 is a transformer 6 and a rectifier 7 for converting the mains voltage into an electric motor drive and so that the accumulator battery DC voltage corresponding voltage assigned. Located between the accumulator battery 5 and the electric motor 4 a switching device 8, a switching device 9 is also between the pantograph 2 and transformer 6 arranged. For the rest, the still required correspond circuit and control measures the state of the art, so that the presentation of details could be dispensed with in this respect.

Claims (1)

System aus Omnibus-Fahrzeugen und Ober leitungsnetz Patentanspruch System aus Omnibus-Fahrzeugen, Oberleitungsnetz und Stromabnehmern zwischen Oberleitungsnetz und Omnibus-Fahrzeugen, wobei die Omnibus-Fahrzeuge einen elektromotorischen Antrieb aufweisen, der wahlweise an das Oberleitunysnetz und/oder an eine mitgeführte Akkumulatorenbatterie anschaltbar ist, d a -d u r c h g e k e n n z e i c h n e t, daß der elektromotorische Antrieb der Omnibus-Fahrzeuge für die Akkumulatorenbatterie-Gleichscannung ausgelegt ist, daß das Oberleitungsnetz als Wechselstromnetz ausgeführt und an das EVU-Wechselstromnetz angeschlossen ist, und daß den elektromotorischen Antrieben ein Transformator sowie ein Gleichrichter für die Umwandlung der Netzspannung in eine dem elektromotorischen Antrieb und der Akkumulatorenbatterie-Gleichspannung entsprechende Spannung zugeordnet sind. System consisting of omnibus vehicles and overhead line network. Patent claim System of omnibus vehicles, overhead line network and pantographs between the overhead line network and omnibus vehicles, whereby the omnibus vehicles have an electric motor drive have, which can optionally be connected to the overhead line network and / or to an accompanying accumulator battery can be switched on, that the electromotive Drive of the omnibus vehicles designed for the accumulator battery DC voltage is that the catenary network designed as an alternating current network and is connected to the EVU alternating current network, and that the electromotive drives a transformer and a rectifier for converting the mains voltage into one of the electromotive drive and the accumulator battery direct voltage corresponding voltage are assigned.
DE19803029216 1980-08-01 1980-08-01 Tram system using over head current supply - energises AC tram drive via transformer and rectifier providing same voltage as auxiliary battery supply Withdrawn DE3029216A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803029216 DE3029216A1 (en) 1980-08-01 1980-08-01 Tram system using over head current supply - energises AC tram drive via transformer and rectifier providing same voltage as auxiliary battery supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803029216 DE3029216A1 (en) 1980-08-01 1980-08-01 Tram system using over head current supply - energises AC tram drive via transformer and rectifier providing same voltage as auxiliary battery supply

Publications (1)

Publication Number Publication Date
DE3029216A1 true DE3029216A1 (en) 1982-02-18

Family

ID=6108673

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19803029216 Withdrawn DE3029216A1 (en) 1980-08-01 1980-08-01 Tram system using over head current supply - energises AC tram drive via transformer and rectifier providing same voltage as auxiliary battery supply

Country Status (1)

Country Link
DE (1) DE3029216A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4727813A (en) * 1985-01-26 1988-03-01 Kabushiki Kaisha Toshiba Linear induction propelled track guided runner
DE4415233C1 (en) * 1994-04-30 1995-12-14 Abs Pumps Ltd Flush valve
DE10031928A1 (en) * 2000-06-30 2002-01-24 Daimler Chrysler Ag Overhead line bus has for temporary operation on trolley wire-free stretch, fuel cell system with fuel cell unit(s) for electrical supply of propulsion drive
WO2003066368A1 (en) * 2002-02-07 2003-08-14 Elin Ebg Traction Gmbh Vehicle comprising a battery drive and a method for operating a vehicle of this type
DE102012214864A1 (en) * 2012-08-21 2014-02-27 Siemens Aktiengesellschaft Vehicle for route network and battery operation

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4727813A (en) * 1985-01-26 1988-03-01 Kabushiki Kaisha Toshiba Linear induction propelled track guided runner
DE4415233C1 (en) * 1994-04-30 1995-12-14 Abs Pumps Ltd Flush valve
DE10031928A1 (en) * 2000-06-30 2002-01-24 Daimler Chrysler Ag Overhead line bus has for temporary operation on trolley wire-free stretch, fuel cell system with fuel cell unit(s) for electrical supply of propulsion drive
WO2003066368A1 (en) * 2002-02-07 2003-08-14 Elin Ebg Traction Gmbh Vehicle comprising a battery drive and a method for operating a vehicle of this type
US7791292B2 (en) 2002-02-07 2010-09-07 Elin Ebg Traction Gmbh Vehicle comprising a battery drive and a method for operating a vehicle of this type
DE102012214864A1 (en) * 2012-08-21 2014-02-27 Siemens Aktiengesellschaft Vehicle for route network and battery operation

Similar Documents

Publication Publication Date Title
DE102013216700B4 (en) Charging battery-capable road vehicles
DE102010006125A1 (en) Charger i.e. direct current/direct current converter, for e.g. hybrid vehicle, has traction network-sided rectifier formed as inverter, where energy of traction battery is transferable via rectifier, transformer and onboard rectifier
EP1186497A1 (en) Railway vehicle with power supply system
EP1472112A1 (en) Vehicle comprising a battery drive and a method for operating a vehicle of this type
DE10218258A1 (en) Energy supply device for passenger coaches and / or railcars
DE3527309A1 (en) Power supply system for railways, in particular short-distance traffic railways whose overhead contact lines/current rails are supplied with direct current
EP2259949B1 (en) Power storage system for a rail-guided vehicle
DE3029216A1 (en) Tram system using over head current supply - energises AC tram drive via transformer and rectifier providing same voltage as auxiliary battery supply
AT521412B1 (en) Rail vehicle
EP0543203B1 (en) Method and circuit for the conversion of electrical energy
DE19908495B4 (en) From an AC contact wire supplied, transformerless feed circuit for an alternator of a railway vehicle
EP3849869B1 (en) Arrangement for driving a locomotive having various energy-provision systems
EP0207280B1 (en) Power supply device for a railway carriage with eddy current brakes
DE112019006610B4 (en) Three-rail power supply control system for a train with a short stator motor
AT406137B (en) ENERGY SUPPLY SYSTEM ON DIESEL ELECTRICAL LOCOMOTIVES
DE102008056008A1 (en) Method for conveying train with multiple locomotives, particularly for transporting goods, involves applying diesel electric locomotive together with electrical locomotive for conveying train
DE3347746A1 (en) Arrangement for supplying the electrical subsystems on tractive units of electric railways
DE3714186C2 (en)
DE2713667A1 (en) Railway vehicle electricity supply - has different loads supplied by outputs of single middle frequency transformer
DE102012009689A1 (en) Multipart rail vehicle, has end wagons provided with current collectors and converters, which transfer energy from power supply networks of different infrastructure networks into form of power system in rail vehicle
WO2001098104A1 (en) Device for supplying energy to rail vehicles
WO2013104408A1 (en) Charging device
DE3541094A1 (en) Arrangement for charging the battery for the electrical system of a magnetic levitation vehicle
DE2357504A1 (en) EQUIPMENT FOR SUPPLYING UTILITY CONSUMERS IN A RAILWAY VEHICLE
DE2736592A1 (en) Train preheating supply using shunting locomotive - uses variable control on diesel-electric unit for single-phase power output

Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8130 Withdrawal