US3594622A
Expired / Lapsed
US
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A linear comb-shaped synchronous motor
Assignee: Toshiba Corp
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Filing: 1970-02-24
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Granted: 1971-07-20
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Expires: 1990-02-24
Abstract
Abstract In a linear comb-shaped synchronous motor, there is provided a linear comb-shaped reaction rail which includes a pair of elongated linear comb-shaped members, each of which also comprises an elongated yoke made of magnetic material and a plurality of poles similarly made of magnetic material integrally mounted on the yoke such that they and are respectively positioned on the yoke apart from each other with a predetermined interval are placed. There is also provided DC exciting means having core the legs of which are respectively directed to the yokes in order to supply the DC excitation for the poles. All the poles integral with one of the comb-shaped members are excited to make the north poles, and on the other hand, all of the poles integral with the other of the comb-shaped members are similarly excited to make the south poles. There is also provided an armature having an armature winding and positioned opposite the functional surface of the pole surfaces. The armature winding is energized from an AC power supply in such a manner that the directions of the armature currents are varied each time the armature passes through the alternately magnetized poles.
Inventors
- 👤 Junpei Inagaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:53
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/03
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
197 words
In a linear comb-shaped synchronous motor having a reaction rail, armature means relatively movable to the rail and DC exciting means for the reaction rail to make alternately north and south poles along the rail, the improvements comprising: a first comb-shaped member made of magnetic material and including a first yoke member and a plural number of first poles integral with the first yoke member, a second comb-shaped member made of magnetic material and including a second yoke member and a plural number of second poles integral with the second yoke member, said first and second comb-shaped members being combined such that their comb-shaped poles are engaged not to magnetically contact each other, at least one armature having an armature winding to be energized from an AC power supply and having its surface having the winding thereon positioned to at least one pair of alternate poles of the first and second comb-shaped members, and DC exciting means for the first and second comb-shaped members, the magnetic fluxes emanating therefrom being passed through the first yoke, the first pole of the first yoke, the armature, the second pole of the second yoke and the second yoke, in turn.
Claim 2
Dependent Claim
197 words
In a linear comb-shaped synchronous motor having a reaction rail, armature means relatively movable to the rail and DC exciting means for the reaction rail to make alternately north and south poles along the rail, the improvements comprising: a first comb-shaped member made of magnetic material and including a first yoke member and a plural number of first poles integral with the first yoke member, a second comb-shaped member made of magnetic material and including a second yoke member and a plural number of second poles integral with the second yoke member, said first and second comb-shaped members being combined such that their comb-shaped poles are engaged not to magnetically contact each other, at least one armature having an armature winding to be energized from an AC power supply and having its surface having the winding thereon positioned to at least one pair of alternate poles of the first and second comb-shaped members, and DC exciting means for the first and second comb-shaped members, the magnetic fluxes emanating therefrom being passed through the first yoke, the first pole of the first yoke, the armature, the second pole of the second yoke and the second yoke, in turn.
Claim 3
Dependent Claim
142 words
In a linear comb-shaped synchronous motor according to claim 1 wherein: the first comb-shaped member is made of casting, and inCludes a first elongated yoke member and a plural number of first poles integral with the first yoke member, the first poles protruding from the first yoke in such a manner that they are positioned in a row and spaced apart from each other at a predetermined interval in the lengthwise direction of the first yoke, the second poles being formed integrally with the second yoke in the same manner as the prescribed first poles, said first and second poles having the same heights respectively, and the first and second comb-shaped members being overlapped and integrally secured with each other such that their surfaces having the protruding poles are positioned opposite to each other so as not to magnetically contact each other.
Claim 4
Dependent Claim
22 words
In a linear comb-shaped synchronous motor according to claim 2 wherein: the first and second elongated comb-shaped members are made of cast-steel.
Claim 5
Dependent Claim
54 words
In a linear comb-shaped synchronous motor according to claim 2 wherein: the first and second elongated comb-shaped members are so overlapped with each other that there results a zigzag space between the opposite surfaces thereof, which zigzag space functions as a magnetic insulation therebetween, and a weblike magnetic insulator located within said zigzag space.
Claim 6
Dependent Claim
38 words
In a linear comb-shaped synchronous motor according to claim 4 wherein: the weblike magnetic insulator is made of any one of casted aluminum, glass fiber reinforced polyester, synthetic rubbers, concrete and plastics as well as the combinations thereof.
Claim 7
Dependent Claim
28 words
In a linear comb-shaped synchronous motor according to claim 4 wherein: the weblike insulator is located between the first and second comb-shaped members to integrally secure the same.
Claim 8
Dependent Claim
43 words
In a linear comb-shaped synchronous motor according to claim 4 wherein: the magnetic insulators are partially located between the first and second elongated comb-shaped members, and fastening devices made of nonmagnetic material are provided between said comb-shaped members to integrally secure the same.
Claim 9
Dependent Claim
221 words
In a linear comb-shaped synchronous motor according to claim 1 wherein: the reaction rail is composed of an upper yoke which includes the first group of poles integral therewith, and a lower yoke including the second group of poles integral therewith, both of said yokes being overlapped so as to alternately engage the first poles with second poles respectively, but to avoid direct magnetic contact between them, said reaction rail being vertically installed on a track such that the upper yoke is in an upper position and the lower yoke is in a lower position near the track, at least one DC exciting device having a pair of legs and a yoke portion with a DC excitation winding, in which the end of one of the legs is directed to the one side of the first yoke and the end of the other is directed to the one side of the second yoke through respective air gaps, at least one linear armature being positioned at the other side of the rail and opposite to the location of the DC excitation device and having a smaller air gap between the functional surface thereof and the pole surface of the rail, and wherein said DC excitation device and the armature are mounted together on a body which is relatively movable to the rail.
Claim 10
Dependent Claim
95 words
In a linear comb-shaped synchronous motor according to claim 8 wherein: DC excitation power supply means is mounted on said body to energize the DC excitation device, AC power supply means is mounted on said body to energize the armature winding of the armature, and electric angular position detector means is mounted on the body such that it is responsive to the relative positions between the armature and the comb-shaped poles of the rail and causes electrical signals to control the output frequencies and conductive directions of the AC output currents of the power supply.
Claim 11
Dependent Claim
216 words
In a linear comb-shaped synchronous motor according to claim 1 wherein: the reaction raIl is composed of an upper yoke which includes the first group of poles integral therewith and a lower yoke including a second group of poles integral therewith, both of said yokes being overlapped so as to alternately engage the first poles with the second poles respectively, but to avoid direct magnetic contact between them, said reaction rail being vertically installed on a track such that the upper yoke is in an upper position and the lower yoke is in a lower position near the track, at least a pair of DC excitation devices respectively having a pair of legs and a yoke portion having a DC excitation winding and wherein the ends of the legs of one of said devices are respectively directed to the one side of the yokes of the rail and the ends of the legs of the other are respectively directed to the other side of the yokes of the rail, and at least a pair of armatures located at opposite sides of the rail as as to position the functional surfaces thereof opposite to the poles, which armatures are positioned so as to be spaced from the DC excitation device along the lengthwise direction of the rail.
Claim 12
Dependent Claim
99 words
In a linear comb-shaped synchronous motor according to claim 10 wherein: a DC excitation power supply means is mounted on said body to energize the DC excitation devices, AC power supply means is mounted on said body to energize the armature windings of the armatures, and electric angular position detector means is mounted on the body such that it is responsive to the relative positions between the armatures and the comb-shaped poles of the rail and causes the electrical signals to control the output frequencies and the conduction directions of the AC output currents of the AC power supply.
Claim 13
Dependent Claim
99 words
In a linear comb-shaped synchronous motor according to claim 1 wherein: the reaction rail is divided into a plurality of longitudinal sections, a magnetic insulator is located between adjacent sections, said insulator having good electric conductivity, a first comb-shaped member being located above the earth surface, a second comb-shaped member being positioned near the earth, whereby the first yoke of the first comb-shaped member is used as a third rail in order to share electric power from an external power supply, and the second yoke of the second comb-shaped member is used as a return-path for the electric current.
Claim 14
Dependent Claim
31 words
In a linear comb-shaped synchronous motor according to claim 1 wherein: at least one DC excitation device is provided between one end of a pair of yokes of the reaction rail.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |