GB2349483A - An engine-driven generator assembly - Google Patents

An engine-driven generator assembly Download PDF

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Publication number
GB2349483A
GB2349483A GB9909648A GB9909648A GB2349483A GB 2349483 A GB2349483 A GB 2349483A GB 9909648 A GB9909648 A GB 9909648A GB 9909648 A GB9909648 A GB 9909648A GB 2349483 A GB2349483 A GB 2349483A
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United Kingdom
Prior art keywords
torque pulses
cogging torque
amplified
produced
engine
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Withdrawn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
GB9909648A
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GB9909648D0 (en
Inventor
Carl Charles Bourne
Christopher Mellors
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MG Rover Group Ltd
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MG Rover Group Ltd
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Publication date
Application filed by MG Rover Group Ltd filed Critical MG Rover Group Ltd
Priority to GB9909648A priority Critical patent/GB2349483A/en
Publication of GB9909648D0 publication Critical patent/GB9909648D0/en
Publication of GB2349483A publication Critical patent/GB2349483A/en
Withdrawn legal-status Critical Current

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    • 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
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/46—Series type
    • 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
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
    • B60K6/52—Driving a plurality of drive axles, e.g. four-wheel drive
    • 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
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • 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
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
    • B60L50/62—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles charged by low-power generators primarily intended to support the batteries, e.g. range extenders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/03—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/02—Details
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1815—Rotary generators structurally associated with reciprocating piston engines
    • 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
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
    • B60K17/356—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
    • 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
    • B60L2210/00—Converter types
    • B60L2210/40—DC to AC converters
    • 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
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/10—Electrical machine types
    • B60L2220/12—Induction machines
    • 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
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/10—Electrical machine types
    • B60L2220/16—DC brushless machines
    • 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
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/10—Electrical machine types
    • B60L2220/18—Reluctance machines
    • 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
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/10—Electrical machine types
    • B60L2220/20—DC electrical machines
    • 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
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/40—Electrical machine applications
    • B60L2220/44—Wheel Hub motors, i.e. integrated in the wheel hub
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/423—Torque
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/44—Drive Train control parameters related to combustion engines
    • B60L2240/443—Torque
    • 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
    • B60L2260/00—Operating Modes
    • B60L2260/20—Drive modes; Transition between modes
    • B60L2260/28—Four wheel or all wheel drive
    • 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
    • B60L2270/00—Problem solutions or means not otherwise provided for
    • B60L2270/10—Emission reduction
    • B60L2270/14—Emission reduction of noise
    • B60L2270/145—Structure borne vibrations
    • 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
    • Y02T10/62—Hybrid 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
    • 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
    • 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
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Electromagnetism (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

An engine-driven generator assembly, suitable for use as a power train in a hybrid vehicle, comprises an internal combustion engine 14 driving a generator 16, which provides electrical power to a set of traction motors 18 which drive the wheels 20 of the vehicle 10. The generator 16 is arranged to produce amplified cogging torque pulses that are synchronised substantially in anti-phase to the combustion torque pulses which are generated by the alternate compression and ignition phases of the engine 14, so as to dampen those combustion torque pulses. The cogging torque pulses are produced by increasing the magnetic flux linkage between a pair of stator poles and a rotor, for example by including strips of permanent magnet material on that pair of stator poles. Other ways of influencing the cogging torque include varying the stator current between phases and varying stator switching time between phases.

Description

An Engine Driven Generator Assembly This invention relates to engine driven generator assemblies and in particular to an engine driven generator assembly suitable for use as a power train for a hybrid vehicle.
Some internal combustion engines, e. g. spark ignition or compression ignition engines, have alternate phases of compression and ignition which lead to cyclic fluctuations in their torque delivery. In some current vehicles, specially tuned mass spring damping systems are used in conjunction with an engine flywheel in an attempt to improve refinement. Some of these systems are tuned for specific engine speeds such as when the engine is idling.
It is an object of this invention to provide an improved engine driven generator assembly which is suitable for use in a hybrid vehicle.
According to the invention there is provided an engine driven generator assembly, the generator being arranged in use to produce amplified cogging torque pulses which are synchronised substantially in anti-phase to combustion torque pulses of the engine, so as to dampen said combustion torque pulses.
The amplified cogging torque pulses may produced: by stator pole pieces of different magnetic configuration from the stator pole pieces of other phases of said generator; by varying the magnetic material between one or more pairs of stator poles; by the integration of a permanent magnet material with one or more pairs of stator poles; as a result of different magnetic configuration between rotor pole pieces; as a result of varying stator switching time between phases; as a result of varying the stator current between phases; or by injecting electrical current into at least one set of stator poles through a set of current injection coils.
The generator may comprise an AC induction machine, wherein the cogging torque pulses may be produced by varying the resistance between bars in a squirrel cage of said machine.
The invention will now be described by way of example with reference to the accompanying drawings, in which: Figure 1 is a schematic diagram of a hybrid vehicle having a powertrain including an engine driven generator assembly according to the invention; Figure 2a represents the torque waveform of an engine of the assembly of Figure 1; Figure 2b represents the torque waveform of a generator of the assembly of Figure 1 ; Figure 2c represents a composite waveform of the engine and generator assembly of Figure 1; Figure 3 is a schematic representation of part of the structure of a first embodiment of the generator of Figure 1 ; Figure 4 is a schematic representation of part of the structure of a second embodiment of the generator of the vehicle of Figure 1; Figure 5 is a schematic representation of part of the structure of a third embodiment of the generator of the vehicle of Figure 1; and Figure 6 is a table of parameters which may be varied in the construction of different embodiments of the generator of the vehicle of Figure 1.
Referring to Figures 1 to 3, a hybrid vehicle 10 comprises an engine driven generator assembly 12 which includes a spark ignition engine 14 driving a generator 16. The generator 16 provides electrical power to a set of traction motors 18 arranged to drive a set of wheels 20 of the vehicle 10.
The engine 14 produces a torque waveform of substantially sinusoidal shape in which the point of lowest torque is substantially aligned with the point of ignition of the engine 14.
The motor 16 comprises a stator including three pairs of poles AA', BB', CC', which are arranged in a three phase format. The generator 16 further comprises a rotor 22 which includes two poles north N and south S. One pair of stator poles AA'is modified by the inclusion of a strip of permanent magnet material 24 such that flux linkage to the rotor 22 is improved over that achieved by the other pairs of stator poles BB', CC'.
In this manner, the generator 16 produces an amplified cogging torque waveform and the poles AA', BB', CC'are arranged such that the amplified cogging torque waveform is 180% out of phase with the torque waveform from the engine such that the amplified cogging torque pulses are synchronised substantially in anti-phase to combustion torque pulses of the engine with the result that the amplified cogging torque pulses reduce the amplitude of the combustion torque waveform and thereby improve refinement of the power train.
It will be understood by the man skilled in the art that the generator configuration shown with particular reference to Figure 3, is adapted for use with a four cylinder engine and that it could be easily modified for use with an eight cylinder engine by the addition of additional poles on the rotor 22. Such a configuration is shown with particular reference to Figure 4.
It will also be appreciated by the man skilled in the art that the creation of the amplified cogging torque pulses is not limited to the addition of strips of permanent magnet material 24 to any particular pair of stator poles AA'. The variation in flux density across the stator poles AA'could also be achieved by the addition of DC injection coils 24, as shown with particular reference to Figure 5.
Referring now to Figure 6, a table is provided which shows four examples of different types of generator 16 and indicates parameters that may be altered for those machines 16 and shows how those parameters may be changed to influence cogging torque.

Claims (13)

  1. CLAIMS 1. An engine driven generator assembly, the generator being arranged in use to produce amplified cogging torque pulses which are synchronised substantially in anti-phase to combustion torque pulses of the engine, so as to dampen said combustion torque pulses.
  2. 2. An assembly according to Claim 1, wherein the amplified cogging torque pulses are produced by stator pole pieces of different magnetic configuration from the stator pole pieces of other phases of said generator.
  3. 3. An assembly according to Claim 1, wherein the amplified cogging torque pulses are produced by varying the magnetic material between one or more pairs of stator poles.
  4. 4. An assembly according to Claim 1, wherein the amplified cogging torque pulses are produced by the integration of a permanent magnet material with one or more pairs of stator poles.
  5. 5. An assembly according to Claim 1, wherein the amplified cogging torque pulses are produced as a result of different magnetic configuration between rotor pole pieces.
  6. 6. An assembly according to Claim 1, wherein the amplified cogging torque pulses are produced as a result of varying stator switching time between phases.
  7. 7. An assembly according to Claim 1, wherein the amplified cogging torque pulses are produced as a result of varying the stator current between phases.
  8. 8. An assembly according to Claim 1, wherein the amplified cogging torque pulses are produced by injecting electrical current into at least one set of stator poles through a set of current injection coils.
  9. 9. An assembly according to Claim 1, the generator comprising an AC induction machine, wherein the cogging torque pulses are produced by varying the resistance between bars in a squirrel cage of said machine.
  10. 10. An engine driven generator assembly substantially as described herein with reference to Figures 1,2,3 and 6 of the accompanying drawings.
  11. 11. An engine driven generator assembly substantially as described herein with reference to Figures 1,2,4 and 6 of the accompanying drawings.
  12. 12. An engine driven generator assembly substantially as described herein with reference to Figures 1,2,5 and 6 of the accompanying drawings.
  13. 13. A power train for a hybrid vehicle, including an engine driven generator assembly according to any preceding claim.
GB9909648A 1999-04-28 1999-04-28 An engine-driven generator assembly Withdrawn GB2349483A (en)

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US8496079B2 (en) 2009-09-16 2013-07-30 Swissauto Powersport Llc Electric vehicle and on-board battery charging apparatus therefore
WO2014053620A3 (en) * 2012-10-05 2014-11-27 Mahle International Gmbh Electric vehicle
US9187083B2 (en) 2009-09-16 2015-11-17 Polaris Industries Inc. System and method for charging an on-board battery of an electric vehicle
US10744868B2 (en) 2016-06-14 2020-08-18 Polaris Industries Inc. Hybrid utility vehicle
US10780770B2 (en) 2018-10-05 2020-09-22 Polaris Industries Inc. Hybrid utility vehicle
US11370266B2 (en) 2019-05-16 2022-06-28 Polaris Industries Inc. Hybrid utility vehicle
US12122228B2 (en) 2021-12-17 2024-10-22 Polaris Industries Inc. Utility vehicle

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GB2241842A (en) * 1990-01-27 1991-09-11 Hitachi Ltd Protective electric circuit in a device for reducing vibrations of a vehicle body
US5185543A (en) * 1990-02-27 1993-02-09 Fichtel & Sachs Ag Motor vehicle drive line torsional vibration damper
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GB2241842A (en) * 1990-01-27 1991-09-11 Hitachi Ltd Protective electric circuit in a device for reducing vibrations of a vehicle body
EP0440185A2 (en) * 1990-02-01 1991-08-07 Hitachi, Ltd. Apparatus for reducing vibrations of the body of a vehicle
US5185543A (en) * 1990-02-27 1993-02-09 Fichtel & Sachs Ag Motor vehicle drive line torsional vibration damper
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US8496079B2 (en) 2009-09-16 2013-07-30 Swissauto Powersport Llc Electric vehicle and on-board battery charging apparatus therefore
US9187083B2 (en) 2009-09-16 2015-11-17 Polaris Industries Inc. System and method for charging an on-board battery of an electric vehicle
WO2014053620A3 (en) * 2012-10-05 2014-11-27 Mahle International Gmbh Electric vehicle
US20150203094A1 (en) * 2012-10-05 2015-07-23 Mahle International Gmbh Electric vehicle
US9764728B2 (en) * 2012-10-05 2017-09-19 Mahle International Gmbh Electric vehicle
US10744868B2 (en) 2016-06-14 2020-08-18 Polaris Industries Inc. Hybrid utility vehicle
US10780770B2 (en) 2018-10-05 2020-09-22 Polaris Industries Inc. Hybrid utility vehicle
US11370266B2 (en) 2019-05-16 2022-06-28 Polaris Industries Inc. Hybrid utility vehicle
US12122228B2 (en) 2021-12-17 2024-10-22 Polaris Industries Inc. Utility vehicle

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