WO2012010489A1 - Système d'alimentation en tension élevée pour véhicule - Google Patents

Système d'alimentation en tension élevée pour véhicule Download PDF

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Publication number
WO2012010489A1
WO2012010489A1 PCT/EP2011/062036 EP2011062036W WO2012010489A1 WO 2012010489 A1 WO2012010489 A1 WO 2012010489A1 EP 2011062036 W EP2011062036 W EP 2011062036W WO 2012010489 A1 WO2012010489 A1 WO 2012010489A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
electrical
network
vehicle according
output
Prior art date
Application number
PCT/EP2011/062036
Other languages
English (en)
Inventor
Robert Honzek
Andreas Szajek
Harald Dietel
Hans-Georg Hornung
Wolfgang Breu
Original Assignee
Agco International Gmbh
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 Agco International Gmbh filed Critical Agco International Gmbh
Priority to EP11743467.0A priority Critical patent/EP2595833A1/fr
Publication of WO2012010489A1 publication Critical patent/WO2012010489A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K25/00—Auxiliary drives

Definitions

  • the invention relates to a high voltage supply system for vehicles, especially agricultural vehicles.
  • Such a vehicle will, in addition to the propulsion system, also have an internal DC voltage network (12V or 24V) for supplying vehicle components and external systems such as trailer lights etc.
  • Tractors differ considerably from trucks, vans and passenger cars as their primarily requirement is not simply to drive over the ground but to power attached implements such as trailers, balers, seed drills or ploughs etc.
  • implements include functions which are currently commonly powered by hydraulic systems or from a Power Take-Off (PTO) shaft driven from an engine of the vehicle.
  • PTO Power Take-Off
  • implements can be of constant speed type, e.g. to lift the boom of a sprayer, or of variable speed type, e.g. to drive a metering system of a seeder.
  • Constant speed type drives may be today driven by the PTO shaft whilst variable speed type drives may be powered by hydraulics using regulators to vary flow and thereby speed of a fluid motor or ram. It is also known to power functions on a trailed implement by electric motors from an electrical supply on the towing vehicle. It is an object of the present invention to provide a vehicle, such as an agricultural vehicle and tractor, which can conveniently provide electrical power to functions on a trailed implement or other electrical consumers.
  • a vehicle having a source of electrical energy and an electrical outlet means connected with the source via electronic control means which provides both an AC and DC power supply to the outlet means.
  • the source of electrical energy may be an internal combustion engine driving a generator.
  • the generator is preferably an AC generator.
  • An AC generator is chosen as it is more compact and efficient than a DC generator as it does not require brushes (which wear) nor a commutator ring (which causes sparking problems).
  • the AC frequency supplied by the generator is depending on the input speed (coming from the combustion engine).
  • the AC generator output may be converted by the control means into a DC voltage which is supplied via a DC network to one or more sets of terminals of the electrical outlet means, this DC network voltage also being converted into an AC output which is supplied to one or more other sets of terminals of the electrical outlet means.
  • This arrangement is adopted as, if a variable speed motor must be supplied, it is more efficient to take the DC network voltage and then convert this DC voltage in a DC/AC unit into AC at the required
  • the source of electrical energy may be a fuel cell and/or a battery.
  • the electrical outlet means may be divided into two or more branches, each branch offering AC and DC output simultaneously.
  • each branch may be connected with the respective AC and DC supply via respective power switches controlled by the control means to protect any consumer connected with the respective branch if a malfunction is detected. These switches are also provided to protect the tractor network in case of undue overload and to protect the operator against electrical shocks.
  • the electrical output means may be divided into two or more branches each branch being switchable between providing either an AC or a DC output.
  • One or more consumers carried by the vehicle may be supplied with DC output from the DC network.
  • One or more consumers carried by the vehicle may also be supplied with an AC output independently of the electrical outlet means via a converter from the DC network.
  • Fig.1 shows a dramatic scheme of a vehicle supply system according the present invention
  • Fig 2 shows a dramatic scheme of a second embodiment of the
  • FIG. 1 this shows a supply system 1 for a tractor 2 with front wheels 3 and rear wheels 4.
  • the system has a combustion engine 10, an electric generator 1 1 driven by the engine crank shaft 0a and an electronic power unit 12 (insulated- gate bipolar transistor) connected to the electric generator by wiring 1 1a.
  • the generator produces AC power with an AC frequency dependent on the combustion engine speed.
  • the electronic power unit converts the AC power output of the generator 1 to a DC voltage with the defined DC- link voltage level to provide ail units connected to DC network 15.
  • a brake chopper 13 is provided to avoid a voltage rise in the DC network 15 if energy is fed back into the system from other sources than the generator.
  • the chopper comprises an oscillating switch in series with a resistor and, depending on the input voltage overshoot (coming from e.g. the implement via the internal network) the switch is oscillated to guide the excess voltage into the resistor transforming the voltage into heat. The oscillation is necessary to keep the network active and supplying energy. If the switch was to be closed completely over a longer period, the complete voltage supplied by the system would be destroyed and all consumers would be non operative. By oscillating the switch, only the peaks of the voltage are destroyed and the system is still operative.
  • the resistors are generally designed to be quite small so they are not capable of receiving a constant high load. Using oscillation enables them to cope with the load.
  • the nominal voltage of the network is 700 V.
  • the overshoot limitation is 900 V. If peaks of > 900 V occur the switch is closed in an oscillatory manner.
  • An insulation monitoring system 14 is provided to monitor the resistance in the network to detect electrical malfunctions in the medium voltage system. This is necessary to protect the life of potential users of the system and to prevent damage in electric components of the tractor or implement or other consumers connected to the system.
  • Internal medium voltage DC network 5 (>400V, 150 kW) is provided for supplying tractor components such as a battery/supply network 16 via DC/DC converter 16a reducing voltage >400 V into, for example, the standard 12V supply.
  • An electronic unit 17 for supplying a heating/ventilating/air conditioning (HVAC) compressor 17 via DC/DC converter 17a is also provided.
  • HVAC heating/ventilating/air conditioning
  • variable cooling fan drive 18 is supplied via a DC/AC inverter 18a to provide a variable frequency to vary fan speed.
  • DC/AC inverter 18a to provide a variable frequency to vary fan speed.
  • a first DC/AC branch 30 which includes an electronic unit 31 for inverting high power DC into high power AC at fixed frequency for the supply of one motor or other rotating device is provided.
  • associated outlet terminal 20 is supplied from electronic unit 31 via a power switch 32 to deactivate the supply terminal connectors 30a, 30b, 30c.
  • the DC network 15 is directly forwarded to the terminal 20 by branch 33 via switch 34 to deactivate DC supply from terminal DC connectors 30d and 30e .
  • a second DC/AC branch 40 and third DC/AC branch 50 are also provided with AC outlet outlets 40a-40c, 50a-50c and DC outlets 40d,40e and 50d,50e in terminal 20 exactly similar to DC/AC branch 30.
  • Branches 40 and 50 also have similar electronic units 41 and 51 , DC branches 43 and 53 and switches 44 and 54.
  • All branches 30, 40 and 50 are equipped with a potential equalisation function 60 in order to equalise potentials between different metal parts that can be touched simultaneously, or to reduce differences of potential which can occur during operation between the bodies of electrical devices and conductive parts of other objects.
  • the tractor stands on rubber tyres while the plough is contacting ground via steel parts.
  • the tyres and metal plough parts have different earthing properties and thus different electric potential, if the operator were to touch both simultaneously, the potential difference would pass through him and he could be injured badly.
  • Fig 2 shows an alternative embodiment in which most of the components are similar to those specified above in relation to Fig 1 and will not therefore be described again.
  • the internal high voltage DC network 15 is spread into four branches three of which, branches 60, 70 and 80 are again similar and thus only branch 60 will be described here.
  • First branch 60 with an integrated DC/AC and electronic unit 61 is provided to optionally : - invert DC into AC,
  • the electronic unit 61 is equipped with several connecting pins 61a to 61 h.
  • switches 62 and 63 By means of switches 62 and 63, these pins 61a to 61 h are connected to terminal 200 which has connectors 200a, 200b, 200c. Branch 60 and the respective switches 62 and 63 are shown in a position in which AC only is supplied to terminal connectors 200a, 200b, and 200c.
  • the other branches 70 and 80 have similar electronic units 71 and 81 , switches 72,73:82,83 and pins 7 a to 71 h and 81a to 81 h which supply terminal connectors 200d, 200e, 200f, 200g, 200h and 200i.
  • Branch 70 and the respective switches 72 and 73 are shown in a position in which DC only is supplied to terminal connectors 200d, 200e, 200f.
  • Branch 80 and the respective switches 82 and 83 are shown in a position in which no connection to terminal connector 200g, 200h, 200i is established, and no supply is provided. This can be used to prevent the user or external electric loads from danger in case of internal errors.
  • a fourth branch 90 is provided to supply low power ( ⁇ 5kW) AC supply for example a circular saw (for cutting wood) or pressure washer. These devices are normally driven by stationary home network, but by providing branch 90 such low power devices can also be used in the field/forestry.
  • the DC/AC inverter 91 is supplying terminal connectors 200k, 200I, 200m.
  • a protective earth is connected to terminal connector 200n and ground is connected to terminal connector 200o.
  • the network could also contain many other internal consumers e.g. air compressors, water and cooling pumps driven by AC or DC voltages from the network.
  • the main energy supply is provided by a combustion engine driving a generator. It is envisaged that the main energy could also be provided by fuel cell, battery without departing from the scope of the present invention.
  • the combustion engine 10 may be used to drive the wheels 3 and 4 of the tractor or an electrical drive system may be employed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

Un véhicule comporte une source (11) d'énergie électrique et un moyen de sortie électrique (20) relié à la source par l'intermédiaire d'un moyen de commande électronique (12) qui alimente le moyen de sortie à la fois en courant alternatif et en courant continu. La source d'énergie électrique est un moteur à combustion interne (10) entraînant un générateur (11) et le générateur (11) fournit une sortie en courant alternatif qui est convertie par le moyen de commande (12) en tension continue qui est apportée par l'intermédiaire d'un réseau à courant continu (15) à un ou plusieurs ensembles de bornes (30d, 30e : 40d, 40e : 50d, 50e) du moyen de sortie électrique (20). Cette tension de réseau continue est également inversée (31, 41, 51) en une sortie en courant alternatif qui est apportée à un ou plusieurs ensembles de bornes (30a, 30b, 30c ; 40a, 40b, 40c ; 50a, 50b, 50c) du moyen de sortie électrique. Selon un autre agencement, la source d'énergie électrique est une pile à combustible et/ou une batterie.
PCT/EP2011/062036 2010-07-22 2011-07-14 Système d'alimentation en tension élevée pour véhicule WO2012010489A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11743467.0A EP2595833A1 (fr) 2010-07-22 2011-07-14 Système d'alimentation en tension élevée pour véhicule

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1012269.5A GB201012269D0 (en) 2010-07-22 2010-07-22 High voltage supply system for a vehicle
GB1012269.5 2010-07-22

Publications (1)

Publication Number Publication Date
WO2012010489A1 true WO2012010489A1 (fr) 2012-01-26

Family

ID=42752595

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/062036 WO2012010489A1 (fr) 2010-07-22 2011-07-14 Système d'alimentation en tension élevée pour véhicule

Country Status (3)

Country Link
EP (1) EP2595833A1 (fr)
GB (3) GB201012269D0 (fr)
WO (1) WO2012010489A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9604514B2 (en) 2011-11-10 2017-03-28 Agco International Gmbh Electrical supply arrangement on a vehicle
WO2021191437A1 (fr) * 2020-03-27 2021-09-30 Bucher Hydraulics Ag Système de distribution d'énergie électrique

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4870811A (en) * 1988-11-28 1989-10-03 Steele Robert M Gasoline powered electrical lawn mower
EP0352304B1 (fr) * 1987-12-21 1993-09-08 Robert Bosch Gmbh Circuit de bord de vehicule
US5563451A (en) * 1995-04-05 1996-10-08 Aichi Sangyo Co. Ltd. Power supply apparatus installed under a platform of a vehicle
DE29702224U1 (de) * 1997-02-10 1997-03-20 Daimler Benz Ag Fahrbarer Geräteträger
US20050151517A1 (en) * 2004-01-14 2005-07-14 Alexandre Cook Power management system for vehicles
EP1935712A1 (fr) * 2006-12-22 2008-06-25 Nederlandse Organisatie voor Toegepast-Natuuurwetenschappelijk Onderzoek TNO Système et procédé pour véhicule

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0352304B1 (fr) * 1987-12-21 1993-09-08 Robert Bosch Gmbh Circuit de bord de vehicule
US4870811A (en) * 1988-11-28 1989-10-03 Steele Robert M Gasoline powered electrical lawn mower
US5563451A (en) * 1995-04-05 1996-10-08 Aichi Sangyo Co. Ltd. Power supply apparatus installed under a platform of a vehicle
DE29702224U1 (de) * 1997-02-10 1997-03-20 Daimler Benz Ag Fahrbarer Geräteträger
US20050151517A1 (en) * 2004-01-14 2005-07-14 Alexandre Cook Power management system for vehicles
EP1935712A1 (fr) * 2006-12-22 2008-06-25 Nederlandse Organisatie voor Toegepast-Natuuurwetenschappelijk Onderzoek TNO Système et procédé pour véhicule

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9604514B2 (en) 2011-11-10 2017-03-28 Agco International Gmbh Electrical supply arrangement on a vehicle
WO2021191437A1 (fr) * 2020-03-27 2021-09-30 Bucher Hydraulics Ag Système de distribution d'énergie électrique

Also Published As

Publication number Publication date
GB201012269D0 (en) 2010-09-08
GB201021975D0 (en) 2011-02-02
GB201021969D0 (en) 2011-02-02
EP2595833A1 (fr) 2013-05-29

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