US3889141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Six pole permanent magnet motor
Assignee: Ford Motor Co
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Filing: 1973-05-24
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Granted: 1975-06-10
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Expires: 1993-05-24
Abstract
Abstract A permanent magnet dynamoelectric machine having an armature and a housing rotatably supporting the armature. A plurality of permanent magnets and two ferromagnetic flux path members are mounted in the housing. Each of the flux path members has end portions engaging two of the permanent magnets. All of the permanent magnets in contact with one flux path member are polarized to have a commonly designated magnetic pole facing the armature and the opposite magnetic pole engaging the ends of the ferromagnetic flux path members. All of the permanent magnets in contact with the other flux path member are polarized to have the opposite magnetic pole facing the armature and the commonly designated magnetic pole engaging the ends of the flux path members. Consequent poles of opposite polarity are formed in the central portion of the two ferromagnetic flux path members. These consequent poles combine with the magnetic poles to produce a six pole dynamoelectric machine using only four permanent magnets.
Inventors
- 👤 Frank R Merriam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:14
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/12; H02K1/17; H02K23/00; H02K23/02; H02K23/04
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
181 words
A permanent magnet dynamoelectric machine comprising a rotor and a stator rotatably supporting said rotor, four permanent magnets, and two ferro-magnetic flux path members mounted in said stator, each of said flux path members having end portions engaging two of said permanent magnets both of the permanent magnets in contact with one of said flux path members having a first commonly designated magnetic pole facing said armature and having their oppositely designated magnetic poles in engagement with said end portions of said one ferromagnetic flux path member, both of the permanent magnets in contact with the second flux path member having a first commonly designated magnetic pole in engagement with said end portions of said second flux path member and their oppositely designated magnetic poles facing said rotor whereby one of said flux path members is polarized as a magnetic north and the other of said flux path members is polarized as a magnetic south and the portions of the flux path member intermediate their ends form consequent poles to provide a six pole dynamoelectric machine using only four permanent magnets.
Claim 2
Dependent Claim
181 words
A permanent magnet dynamoelectric machine comprising a rotor and a stator rotatably supporting said rotor, four permanent magnets, and two ferro-magnetic flux path members mounted in said stator, each of said flux path members having end portions engaging two of said permanent magnets both of the permanent magnets in contact with one of said flux path members having a first commonly designated magnetic pole facing said armature and having their oppositely designated magnetic poles in engagement with said end portions of said one ferromagnetic flux path member, both of the permanent magnets in contact with the second flux path member having a first commonly designated magnetic pole in engagement with said end portions of said second flux path member and their oppositely designated magnetic poles facing said rotor whereby one of said flux path members is polarized as a magnetic north and the other of said flux path members is polarized as a magnetic south and the portions of the flux path member intermediate their ends form consequent poles to provide a six pole dynamoelectric machine using only four permanent magnets.
Claim 3
Dependent Claim
33 words
The machine according to claim 1 wherein each one of the four permanent magnets is arranged to be in contact with an end portion of no more than one ferromagnetic flux path member.
Claim 4
Dependent Claim
62 words
The combination of claim 2 in which each of said flux path members has a body portion positioned intermediate said end portions, each of said body portions having a portion facing said rotor and radially spaced from said rotor a distance substantially the same as the radial distAnce between said rotor and the magnetic poles of said permanent magnets facing said rotor.
Claim 5
Dependent Claim
75 words
The combination of claim 2 in which each of said flux path members has a body portion positioned intermediate said end portions, each of said body portions having a portion facing said rotor in closed spaced radial relationship to said rotor and forming a magnetic field pole of said motor of a polarity opposite to that of the polarity of the poles of the permanent magnets facing said rotor in engagement with its end portions.
Claim 6
Dependent Claim
179 words
A permanent magnet dynamoelectric machine comprising an armature, a housing rotatably supporting said armature, four flat block permanent magnets, and two ferromagnetic flux path members, each of said ferromagnetic flux path members having flat end portions and an intermediate body portion, one face of each of said flur flat block permanent magnets being positioned in engagement with one end of one of said ferromagnetic flux path members, said housing including means for locating said ferromagnetic flux path members and said permanent magnets in said housing in a position where the other face of each of said flat block permanent magnets is radially spaced from said armature and the body portion of each of said flux path members is radially spaced from said armature, said one face of the two permanent magnets in contact with one of said flux path members having a first magnetic polarity and said one face of the two permanent magnets in contact with the other flux path member having the opposite magnetic polarity whereby a six pole dynamoelectric machine is formed using four permanent magnets.
Claim 7
Dependent Claim
179 words
A permanent magnet dynamoelectric machine comprising an armature, a housing rotatably supporting said armature, four flat block permanent magnets, and two ferromagnetic flux path members, each of said ferromagnetic flux path members having flat end portions and an intermediate body portion, one face of each of said flur flat block permanent magnets being positioned in engagement with one end of one of said ferromagnetic flux path members, said housing including means for locating said ferromagnetic flux path members and said permanent magnets in said housing in a position where the other face of each of said flat block permanent magnets is radially spaced from said armature and the body portion of each of said flux path members is radially spaced from said armature, said one face of the two permanent magnets in contact with one of said flux path members having a first magnetic polarity and said one face of the two permanent magnets in contact with the other flux path member having the opposite magnetic polarity whereby a six pole dynamoelectric machine is formed using four permanent magnets.
Claim 8
Dependent Claim
42 words
The machine according to claim 5 wherein the radially outer polarized faces of each of the permanent magnets are arranged so that the permanent magnets are in contactive engagement with one end of only one of the two ferromagnetic flux path members.
Claim 9
Dependent Claim
41 words
The combination of claim 6 in which the radial spacing between said armature and said other face of each of said permanent magnets and a part of said body portion of each of said ferromagnetic flux path members is substantially equal.
Claim 10
Dependent Claim
99 words
The combination of claim 6 in which a part of said body portion of each of said ferromagnetic flux path members is radially spaced from said armature a distance to provide an effective flux path from said other face of each of said flat block permanent magnets through said armature to said part of said body portion and through the end of said flux path member to said one face of said flat block permanent magnet whereby said part of said body portion of each of said flux path members forms a magnetic field pole for said dynamoelectric machine.
Claim 11
Dependent Claim
141 words
A dynamoelectric machine comprising a rotor and a stator, said stator including a housing member rotatably supporting said rotor, four permanent magnets and two ferromagnetic flux path members, said housing member including means for supporting one magnetic pole of each permanent magnet in radial spaced relationship to the outer periphery of said rotor, the other pole of each permanent magnet in engagement with one end portion of the two ferromagnetic flux members and a central portion of each ferromagnetic flux member in a radial spaced position from the outer periphery of said rotor to form magnetic field p poles for said dynamoelectric machine, said one magnetic pole of the permanent magnets and the magnetic field poles in said flux path member central portions arranged to be of lalternating polarity about the rotor whereby six flux paths through the rotor are formed.
Claim 12
Dependent Claim
141 words
A dynamoelectric machine comprising a rotor and a stator, said stator including a housing member rotatably supporting said rotor, four permanent magnets and two ferromagnetic flux path members, said housing member including means for supporting one magnetic pole of each permanent magnet in radial spaced relationship to the outer periphery of said rotor, the other pole of each permanent magnet in engagement with one end portion of the two ferromagnetic flux members and a central portion of each ferromagnetic flux member in a radial spaced position from the outer periphery of said rotor to form magnetic field p poles for said dynamoelectric machine, said one magnetic pole of the permanent magnets and the magnetic field poles in said flux path member central portions arranged to be of lalternating polarity about the rotor whereby six flux paths through the rotor are formed.
Claim 13
Dependent Claim
36 words
The machine according to claim 9 wherein the other magnetic pole of each permanent magnet is supported such that each permanent magnet is in engagement with an end portion of only one ferromagnetic flux path member.
Claim 14
Dependent Claim
47 words
The combination of claim 10, in which each ferromagnetic flux path member has a flat end portion, each permanent magnet is of flat block construction, and one face of each permanent magnet is positioned in engagement with one fLat end portion of said ferromagnetic flux path members.
Claim 15
Dependent Claim
28 words
The combination of claim 10 in which said means included in said housing member includes means for receiving said two ferromagnetic flux path members in a pressfit relationship.
Claim 16
Dependent Claim
72 words
The combination of claim 12 in which said means for receiving said two ferromagnetic flux path members in a pressfit relationship comprises an axially extending flange on said housing and a plurality of axially extending pins positioned radially inwardly of said axial extending flange a distance approximately equal to the thickness of said ferromagnetic flux path members, said ferromagnetic flux path members being positioned between said axially extending flange and said pins.
Claim 17
Dependent Claim
66 words
The combination of claim 13 and further comprising a pair of nonmagnetic tab means extending radially inwardly from said axially extending flange and in opposed relationship to one another, said tab means including means for receiving one edge of each of said flat block permanent magnets, the opposite edge of each of said permanent magnets being positioned in engagement with one of said axially extending pins.
Claim 18
Dependent Claim
177 words
A permanent magnet dynamoelectric machine comprising a rotor and a stator, a plurality of permanent magnets, an even plurality of ferromagnetic flux path members and means for holding said plurality of permanent magnets and said ferromagnetic flux path members in assembled relationship in said stator, each of said permanent magnets being polarized in a radial direction with respect to the axis of the dynamoelectric machine, the permanent magnets in engagement with alternate ones of the flux path members being polarized so that a commonly designated magnetic pole of the permanent magnets is facing the rotor and the permanent magnets in engagement with the remainder of the flux path members being oppositely polarized so that commonly designated magnetic pole is in contact with the assocaited flux path member, each of said ferromagnetic flux path members forming a magnetic field pole for the rotor intermediate the pole formed by two adjacent permanent magnets whereby the rotor will provide a number of flux paths determined by the number of permanent magnet poles added to the number of flux path members.
Claim 19
Dependent Claim
177 words
A permanent magnet dynamoelectric machine comprising a rotor and a stator, a plurality of permanent magnets, an even plurality of ferromagnetic flux path members and means for holding said plurality of permanent magnets and said ferromagnetic flux path members in assembled relationship in said stator, each of said permanent magnets being polarized in a radial direction with respect to the axis of the dynamoelectric machine, the permanent magnets in engagement with alternate ones of the flux path members being polarized so that a commonly designated magnetic pole of the permanent magnets is facing the rotor and the permanent magnets in engagement with the remainder of the flux path members being oppositely polarized so that commonly designated magnetic pole is in contact with the assocaited flux path member, each of said ferromagnetic flux path members forming a magnetic field pole for the rotor intermediate the pole formed by two adjacent permanent magnets whereby the rotor will provide a number of flux paths determined by the number of permanent magnet poles added to the number of flux path members.
Claim 20
Dependent Claim
22 words
The machine according to claim 15 wherein each of said permanent magnets is in contact with only one ferromagnetic flux path member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |