WO1999026332A1 - High performance alternator using duplex mode generation - Google Patents

High performance alternator using duplex mode generation Download PDF

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Publication number
WO1999026332A1
WO1999026332A1 PCT/US1998/017581 US9817581W WO9926332A1 WO 1999026332 A1 WO1999026332 A1 WO 1999026332A1 US 9817581 W US9817581 W US 9817581W WO 9926332 A1 WO9926332 A1 WO 9926332A1
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WO
WIPO (PCT)
Prior art keywords
alternator
windings
winding
output
phase
Prior art date
Application number
PCT/US1998/017581
Other languages
French (fr)
Other versions
WO1999026332A8 (en
Inventor
William R. Krueger
Original Assignee
Outboard Marine Corporation
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 Outboard Marine Corporation filed Critical Outboard Marine Corporation
Priority to JP2000521583A priority Critical patent/JP2001523939A/en
Priority to AU92043/98A priority patent/AU9204398A/en
Publication of WO1999026332A1 publication Critical patent/WO1999026332A1/en
Publication of WO1999026332A8 publication Critical patent/WO1999026332A8/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/16—Synchronous generators
    • H02K19/34—Generators with two or more outputs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
    • H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
    • H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices

Definitions

  • the present invention relates in general to alternators and in particular to a high performance alternator using a duplex mode generation that has the capability of providing high output at high speed with greatly increased low speed performance.
  • alternators involves trade-offs concerning output versus speed. If the alternator is wound so as to provide high output at low speed, the high speed output is reduced. Conversely, if the alternator is wound for high output at high speed, the low speed output is reduced.
  • the present invention relates to an alternator that uses two star connected windings instead of one.
  • the first winding is wound with the proper number of turns and wire size to provide optimum low speed output.
  • the second star winding is wound with the proper number of turns and wire size to provide the optimum output at high speed.
  • the two outputs are then electronically added to yield the duplex output.
  • the respective phases of the two sets of star windings are wound in common slots.
  • each phase of the first star winding shares a magnetic pole or slot with a corresponding phase of the second star winding.
  • the first and second star windings, though they share poles, will differ in number of turns and possibly in wire size.
  • Each of the two sets of star windings are magnetically coupled to their respective poles but are electrically isolated from each other.
  • the outputs of the first and second windings are not combined until after they are rectified. Since current cannot flow backwards through the rectifiers, they do double duty by providing rectification and electrical isolation of low and high speed current
  • the present invention relates to an alternator arrangement comprising a first three-phase induction winding having a first number of turns and wire size for providing optimum output current at low alternator speeds, a second three-phase induction winding wound in common with the first three-phase induction winding and having a second number of turns and wire size for providing optimum output current at high alternator speeds, and first and second rectifier circuits coupled to respective ones of the outputs of the first and second three-phase induction windings for providing a first DC output at low alternator speeds and a second different DC output at high alternator speeds.
  • FIG. 1 is a circuit diagram of the high performance alternator
  • FIG. 2 is a cross-sectional perspective view illustrating how common phases of each winding share the same starter slot.
  • FIG. 1 illustrates the circuit diagram of the novel high performance alternator 10 that uses a duplex mode generation.
  • the alternator 10 comprises a first three-phase winding 12 in the star configuration and having phase winding 14, phase winding 16, and phase winding 18.
  • the second three-phase winding 20 includes a star-shaped winding having phase 22, phase 24, and phase 26.
  • a phantom line interconnecting phase 14 of winding 12 and phase 22 of winding 20 denotes that the windings are formed in common slots or share a common pole.
  • the phantom line 30 represents the sharing of a common slot or pole by winding 18 of three-phase winding 12 and winding 26 of three-phase winding 20.
  • phantom line 32 indicates the sharing of a common pole or a slot by phase winding 16 of three-phase winding 12 and phase winding 24 of three-phase winding 20.
  • the three-phase winding 12 is wound with the proper number of turns and wire size to provide optimum low speed output. Since such output would vary with the load and current demand, no particular number of turns and wire size is indicated here, but clearly one skilled in the art would design such windings with the proper number of turns and wire size to provide the desired output.
  • three-phase winding 20 is wound with the proper number of turns and wire size to provide optimum output at high speed. Again, one skilled in the art would know how many turns of a particular wire size would be required to produce a desired output for a given load.
  • three-phase winding 12 and three-phase winding 20 are magnetically coupled to their respective poles but as can be seen are electrically isolated from each other.
  • the output from each of the phase windings of the three-phase winding 12 are coupled to a bridge rectifier 34.
  • the output from phase winding 14 is coupled to the junction of rectifiers or diodes 36 and 38, the output from phase winding 18 is coupled to the junction of rectifiers or diodes 40 and 42 while the output of phase winding 16 is coupled to the junction between rectifiers or diodes 44 and 46.
  • the outputs of rectifiers 36, 40, and 44 are combined on line 48 to load 50.
  • phase winding 22 has its output coupled to the junction of rectifiers or diodes 54 and 56, the output for phase winding 26 is coupled to the junction of rectifiers or diodes 58 and 60 while the output from phase winding 24 is coupled to the junction of diodes 62 and 64.
  • the outputs of diodes 54, 58, and 62 are coupled to line 66 which is connected to load 50.
  • the rectified outputs from three-phase winding 12 and three-phase winding 20 are not combined until after they are rectified. Since current cannot flow backwards through the rectifiers 34 and 52, they do double duty by providing both rectification and electrical isolation of the low and high speed windings 12 and 20. If isolation were not provided by the rectifiers, windings 12 and 20 would buck each other and become very inefficient.
  • FIG. 2 is a prospective cross-sectional view of an armature 68 having a plurality of slots 70 formed therein. It can be seen that corresponding phase windings 14 and 22 of the three-phase windings 12 and 20 are wound in a common slot while common phases 16 and 24 are wound in common slots and phase windings 18 and 26 are wound in common slots.
  • a novel high performance alternator that has a duplex mode generation by having a first winding wound with a proper number of turns and wire size to provide optimum low speed output and a second winding wound with a proper number of turns and wire size to provide optimum amount but at high speed of the alternator.
  • the two outputs are then electronically added to yield the duplex output.
  • the two sets of windings are wound in common slots or share common poles as indicated by the dotted lines. They indicate that each phase of the first winding shares a pole or slot with a corresponding phase of the second winding.
  • the first and second windings though they share poles or slots, will differ in number of turns and possible wire size according to the need.
  • the first and second windings are magnetically coupled to their respective poles but are electrically isolated from each other. It is to be understood that the star-shaped windings could be replaced with delta windings by those skilled in the art.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)
  • Windings For Motors And Generators (AREA)
  • Synchronous Machinery (AREA)

Abstract

A high performance alternator using duplex mode generation wherein the alternator (10) is designed using two windings (12, 20) instead of one. The first winding (12) is wound with the proper number of turns and wire size to provide optimum low speed output and the second winding (20) is wound with the proper number of turns and wire size to provide optimum output at high speed of the alternator. The two outputs are then electrically added to yield a duplex output.

Description

HIGH PERFORMANCE ALTERNATOR USING DUPLEX MODE GENERATION
BACKGROUND OF THE INVENTION
FIELD OF THE INVENTION
The present invention relates in general to alternators and in particular to a high performance alternator using a duplex mode generation that has the capability of providing high output at high speed with greatly increased low speed performance.
DESCRIPTION OF RELATED ART INCLUDING INFORMATION DISCLOSED UNDER 37 CFR 1.97 AND 1.98
It is well known that the design of alternators involves trade-offs concerning output versus speed. If the alternator is wound so as to provide high output at low speed, the high speed output is reduced. Conversely, if the alternator is wound for high output at high speed, the low speed output is reduced.
One solution to the problem is to make the alternator physically larger so that it has adequate output in the worst case situation. But this is not cost efficient and adding size may be impossible if only limited space is available. The problem was addressed in U. S. Patent No. 4,456,870 wherein the induction winding was subdivided into two half windings star connected in series with each other at low running speeds and in parallel with each other at other speeds. This, of course, requires a control circuit that detects speed and a circuit for changing the series connection to a parallel connection at the right time. U.S. Patent No. 5,397,975 relates to a high efficiency hybrid alternator in which the rotating magnetic field is provided by a rotor having a permanent magnet portion and a wound field portion operating in combination. Thus the alternator has a single set of windings but which also has a rotor winding that provides a forward excitation current at low engine speed to increase the output and a reverse excitation current at high speed to decrease the output from the alternator.
It would be advantageous to have an alternator of simple construction that has the capability of providing high output at high speed with greatly increased low speed performance.
SUMMARY OF THE INVENTION
The present invention relates to an alternator that uses two star connected windings instead of one. The first winding is wound with the proper number of turns and wire size to provide optimum low speed output. The second star winding is wound with the proper number of turns and wire size to provide the optimum output at high speed. The two outputs are then electronically added to yield the duplex output. The respective phases of the two sets of star windings are wound in common slots. Thus each phase of the first star winding shares a magnetic pole or slot with a corresponding phase of the second star winding. The first and second star windings, though they share poles, will differ in number of turns and possibly in wire size. Each of the two sets of star windings are magnetically coupled to their respective poles but are electrically isolated from each other. The outputs of the first and second windings are not combined until after they are rectified. Since current cannot flow backwards through the rectifiers, they do double duty by providing rectification and electrical isolation of low and high speed current generating windings.
Thus it is an object of the present invention to provide a high performance alternator using duplex mode generation.
It is also an object of the present invention to provide an alternator that provides optimum output current at low alternating speeds from a first three-phase induction winding and optimum output current at high alternator speeds from a second three- phase induction winding. It is still another object of the present invention to rectify the outputs of each of the three-phase induction windings to provide a first DC output at low alternator speeds and a second different DC output at high alternator speeds.
Thus the present invention relates to an alternator arrangement comprising a first three-phase induction winding having a first number of turns and wire size for providing optimum output current at low alternator speeds, a second three-phase induction winding wound in common with the first three-phase induction winding and having a second number of turns and wire size for providing optimum output current at high alternator speeds, and first and second rectifier circuits coupled to respective ones of the outputs of the first and second three-phase induction windings for providing a first DC output at low alternator speeds and a second different DC output at high alternator speeds.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the present invention will be more fully disclosed when taken in conjunction with the following DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S) in which like numerals represent like elements and in which: FIG. 1 is a circuit diagram of the high performance alternator; and
FIG. 2 is a cross-sectional perspective view illustrating how common phases of each winding share the same starter slot.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S)
FIG. 1 illustrates the circuit diagram of the novel high performance alternator 10 that uses a duplex mode generation. As can be seen in FIG. 1, the alternator 10 comprises a first three-phase winding 12 in the star configuration and having phase winding 14, phase winding 16, and phase winding 18. The second three-phase winding 20 includes a star-shaped winding having phase 22, phase 24, and phase 26. It will be noted that a phantom line interconnecting phase 14 of winding 12 and phase 22 of winding 20 denotes that the windings are formed in common slots or share a common pole. Likewise, the phantom line 30 represents the sharing of a common slot or pole by winding 18 of three-phase winding 12 and winding 26 of three-phase winding 20. Also, phantom line 32 indicates the sharing of a common pole or a slot by phase winding 16 of three-phase winding 12 and phase winding 24 of three-phase winding 20.
It is to be understood that the three-phase winding 12 is wound with the proper number of turns and wire size to provide optimum low speed output. Since such output would vary with the load and current demand, no particular number of turns and wire size is indicated here, but clearly one skilled in the art would design such windings with the proper number of turns and wire size to provide the desired output.
In like manner, three-phase winding 20 is wound with the proper number of turns and wire size to provide optimum output at high speed. Again, one skilled in the art would know how many turns of a particular wire size would be required to produce a desired output for a given load.
Thus, three-phase winding 12 and three-phase winding 20 are magnetically coupled to their respective poles but as can be seen are electrically isolated from each other. The output from each of the phase windings of the three-phase winding 12 are coupled to a bridge rectifier 34. The output from phase winding 14 is coupled to the junction of rectifiers or diodes 36 and 38, the output from phase winding 18 is coupled to the junction of rectifiers or diodes 40 and 42 while the output of phase winding 16 is coupled to the junction between rectifiers or diodes 44 and 46. The outputs of rectifiers 36, 40, and 44 are combined on line 48 to load 50.
The output from three-phase winding 20 is coupled to bridge rectifier 52. Phase winding 22 has its output coupled to the junction of rectifiers or diodes 54 and 56, the output for phase winding 26 is coupled to the junction of rectifiers or diodes 58 and 60 while the output from phase winding 24 is coupled to the junction of diodes 62 and 64. The outputs of diodes 54, 58, and 62 are coupled to line 66 which is connected to load 50. Thus the rectified outputs from three-phase winding 12 and three-phase winding 20 are not combined until after they are rectified. Since current cannot flow backwards through the rectifiers 34 and 52, they do double duty by providing both rectification and electrical isolation of the low and high speed windings 12 and 20. If isolation were not provided by the rectifiers, windings 12 and 20 would buck each other and become very inefficient.
FIG. 2 is a prospective cross-sectional view of an armature 68 having a plurality of slots 70 formed therein. It can be seen that corresponding phase windings 14 and 22 of the three-phase windings 12 and 20 are wound in a common slot while common phases 16 and 24 are wound in common slots and phase windings 18 and 26 are wound in common slots.
Thus there has been disclosed a novel high performance alternator that has a duplex mode generation by having a first winding wound with a proper number of turns and wire size to provide optimum low speed output and a second winding wound with a proper number of turns and wire size to provide optimum amount but at high speed of the alternator. The two outputs are then electronically added to yield the duplex output. The two sets of windings are wound in common slots or share common poles as indicated by the dotted lines. They indicate that each phase of the first winding shares a pole or slot with a corresponding phase of the second winding. Again, the first and second windings, though they share poles or slots, will differ in number of turns and possible wire size according to the need. The first and second windings are magnetically coupled to their respective poles but are electrically isolated from each other. It is to be understood that the star-shaped windings could be replaced with delta windings by those skilled in the art.
The corresponding structures, materials, acts, and equivalents of all means or step plus function elements in the claims below are intended to include any structure, material, or act for performing the function in combination with other claimed elements as specifically claimed.

Claims

WHAT IS CLAIMED IS:
1. An alternator arrangement comprising: a first three-phase induction winding having a first number of turns and wire size for providing optimum output current at low alternator speeds; a second three-phase induction winding wound in common with the first three-phase induction winding and having a second different number of turns and wire size for providing optimum output current at high alternator speeds; and first and second rectifier circuits coupled to respective ones of the outputs of the first and second three-phase inductor windings for providing a first DC output at low alternator speeds and a second different DC output at high alternator speeds.
2. An alternator arrangement as in claim 1 further including a common magnetic pole on said alternator for sharing common inductor windings of each of the first and second three-phase induction windings.
3. An alternator arrangement as in claim 1 further including a common winding slot arrangement on said alternator for receiving common inductor windings of each of the first and second three-phase induction windings.
4. An alternator arrangement as in claim 1 wherein said first and second rectifier circuits electrically isolate the first and second three-phase induction windings.
5. An alternator arrangement as in claim 1 further comprising a common output junction coupled to receive the output of both said first and second rectifier circuits to provide a single optimum output current at both high and low alternator speeds.
6. An alternator arrangement as in claim 1 wherein each of the three-phase windings is a star-shaped winding.
7. An alternator arrangement as in claim 1 wherein each of the three-phase windings is a delta-shaped winding.
PCT/US1998/017581 1997-11-14 1998-08-25 High performance alternator using duplex mode generation WO1999026332A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2000521583A JP2001523939A (en) 1997-11-14 1998-08-25 High performance alternator using dual mode power generation
AU92043/98A AU9204398A (en) 1997-11-14 1998-08-25 High performance alternator using duplex mode generation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US97058597A 1997-11-14 1997-11-14
US08/970,585 1997-11-14

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Publication Number Publication Date
WO1999026332A1 true WO1999026332A1 (en) 1999-05-27
WO1999026332A8 WO1999026332A8 (en) 1999-07-15

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1170847A2 (en) * 2000-06-22 2002-01-09 Denso Corporation Rotary electric machine for vehicle
US6707170B2 (en) * 2001-07-19 2004-03-16 Yamaha Hatsudoki Kabushiki Kaisha Inverter type generator
US7652900B2 (en) 2005-02-07 2010-01-26 Yamaha Motor Power Products Kabushiki Kaisha Inverter type AC generator with a zero-crossing detection circuit used to provide a synchronized operation and method of operating the same
EP3518392B1 (en) * 2016-09-20 2021-12-08 DMG Mori Co., Ltd. Motor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011148501A1 (en) * 2010-05-28 2011-12-01 トヨタ自動車株式会社 Stator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4163187A (en) * 1975-01-09 1979-07-31 Motorola Automobile Alternator having single stator with dual windings and compound output
US4456870A (en) * 1981-07-23 1984-06-26 Marelli Autronica S.P.A. Split windings motor vehicle alternator
US4549106A (en) * 1981-12-17 1985-10-22 Stroud Lebern W Four-five alternator coil winding
US5397975A (en) * 1993-06-14 1995-03-14 Ecoair Corp. Hybrid alternator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4163187A (en) * 1975-01-09 1979-07-31 Motorola Automobile Alternator having single stator with dual windings and compound output
US4456870A (en) * 1981-07-23 1984-06-26 Marelli Autronica S.P.A. Split windings motor vehicle alternator
US4549106A (en) * 1981-12-17 1985-10-22 Stroud Lebern W Four-five alternator coil winding
US5397975A (en) * 1993-06-14 1995-03-14 Ecoair Corp. Hybrid alternator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1170847A2 (en) * 2000-06-22 2002-01-09 Denso Corporation Rotary electric machine for vehicle
EP1170847A3 (en) * 2000-06-22 2003-10-15 Denso Corporation Rotary electric machine for vehicle
US6707170B2 (en) * 2001-07-19 2004-03-16 Yamaha Hatsudoki Kabushiki Kaisha Inverter type generator
US7652900B2 (en) 2005-02-07 2010-01-26 Yamaha Motor Power Products Kabushiki Kaisha Inverter type AC generator with a zero-crossing detection circuit used to provide a synchronized operation and method of operating the same
EP3518392B1 (en) * 2016-09-20 2021-12-08 DMG Mori Co., Ltd. Motor

Also Published As

Publication number Publication date
AU9204398A (en) 1999-06-07
JP2001523939A (en) 2001-11-27
WO1999026332A8 (en) 1999-07-15

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