US4095150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-phase asynchronous motor
Assignee: Individual
•
Filing: 1976-07-12
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Granted: 1978-06-13
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Expires: 1996-07-12
Abstract
Abstract For the purpose of providing a two-phase asynchronous motor of the kind comprising a wound stator made up of two portions spacedly disposed parallel to each other and in which the flux flowing in all the field magnets of the stator is exclusively that of their own phase and in which sufficient space is available for a comparatively large number of field magnets, the stator windings of each phase are each accommodated in one said portion of the stator only and the poles of a member movable with respect to the stator are in the form of ferromagnetic bridges, surrounded and magnetically separated with respect to each other by a short-circuit element, the arrangement being such that the magnetic circuit of adjacent stator poles is completed directly via the pole shoes of the oppositely disposed portion of the stator. The invention is applicable to both linear and rotary motors. In the case of a rotary motor, the said member defines the rotor and the said element is in the form of a short-circuit cage.
Inventors
- 👤 Karlheinz Senckel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:49
CPC Classifications
H; H02; H02P; H02P27/00; H02P27/04; H02P27/06; H02K; H02K17/00; H02K17/02; H02K17/16; H02K41/00; H02K41/02; H02K41/025
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
217 words
A two-phase asynchronous motor comprising: a stator having stator windings, said stator including a first stator portion and a second like stator portion spacedly disposed parallel to said first stator portion, said stator portions including ferromagnetic cores which together with said stator windings define field magnets, said cores having widened pole shoes, and said stator windings being arranged in said stator portions on said ferromagnetic cores, the stator windings of one phase being accommodated in said first stator portion only and the stator windings of a second phase being accommodated in said second stator portion only, said stator windings being displaced with respect to each other in a direction of movement according to the phase angle; and, a member arranged between said stator portions and mounted for movement with respect thereto, said member including a short-circuit electrically conductive element of planar configuration adapted for induction therein of an electrical current by said field magnets and further including ferromagnetic bridges magnetically separated from each other by said short-circuit element and extending from one side of said element to the other and including broadened end plates thereon, wherein said pole shoes and said end plates will complete a magnetic circuit between two adjacent stator poles of one stator portion directly via a pole shoe of said other stator portion.
Claim 2
Dependent Claim
217 words
A two-phase asynchronous motor comprising: a stator having stator windings, said stator including a first stator portion and a second like stator portion spacedly disposed parallel to said first stator portion, said stator portions including ferromagnetic cores which together with said stator windings define field magnets, said cores having widened pole shoes, and said stator windings being arranged in said stator portions on said ferromagnetic cores, the stator windings of one phase being accommodated in said first stator portion only and the stator windings of a second phase being accommodated in said second stator portion only, said stator windings being displaced with respect to each other in a direction of movement according to the phase angle; and, a member arranged between said stator portions and mounted for movement with respect thereto, said member including a short-circuit electrically conductive element of planar configuration adapted for induction therein of an electrical current by said field magnets and further including ferromagnetic bridges magnetically separated from each other by said short-circuit element and extending from one side of said element to the other and including broadened end plates thereon, wherein said pole shoes and said end plates will complete a magnetic circuit between two adjacent stator poles of one stator portion directly via a pole shoe of said other stator portion.
Claim 3
Dependent Claim
203 words
A two-phase asynchronous motor comprising: a stator having stator windings, said stator including a first substantially disc-shaped stator portion and a second like-shaped stator portion spaced axially from said first stator portion, said stator portions including ferromagnetic cores which together with said stator windings define field magnets, said ferromagnetic cores having widened pole shoes, said stator windings being arranged on the stator portions on said ferromagnetic cores of said stator windings, the stator windings of one phase being accommodated in said first stator portion only and the stator windings of a second phase being accommodated in said second stator portion only, said stator windings being displaced with respect to each other according to the phase angle; and, a substantially disc-shaped rotor arranged between said stator portions and mounted rotatably therebetween, said rotor including a short-circuit cage of planar configuration and further including ferromagnetic bridges magnetically separated from each other by said short-circuit cage and extending from one side of said cage to the other, said ferromagnetic bridges including broadened end plates, wherein said pole shoes and said end plates will complete a magnetic circuit between two adjacent stator poles of one stator portion directly via a pole shoe of said other stator portion.
Claim 4
Dependent Claim
203 words
A two-phase asynchronous motor comprising: a stator having stator windings, said stator including a first substantially disc-shaped stator portion and a second like-shaped stator portion spaced axially from said first stator portion, said stator portions including ferromagnetic cores which together with said stator windings define field magnets, said ferromagnetic cores having widened pole shoes, said stator windings being arranged on the stator portions on said ferromagnetic cores of said stator windings, the stator windings of one phase being accommodated in said first stator portion only and the stator windings of a second phase being accommodated in said second stator portion only, said stator windings being displaced with respect to each other according to the phase angle; and, a substantially disc-shaped rotor arranged between said stator portions and mounted rotatably therebetween, said rotor including a short-circuit cage of planar configuration and further including ferromagnetic bridges magnetically separated from each other by said short-circuit cage and extending from one side of said cage to the other, said ferromagnetic bridges including broadened end plates, wherein said pole shoes and said end plates will complete a magnetic circuit between two adjacent stator poles of one stator portion directly via a pole shoe of said other stator portion.
Claim 5
Dependent Claim
37 words
A motor according to claim 1, wherein said member has a plurality of magnetic poles and wherein there is only a small difference between the number of poles of said member and the number of stator poles.
Claim 6
Dependent Claim
35 words
A motor according to claim 2, wherein said rotor has a plurality of magnetic poles and wherein there is only a small difference between the number of rotor poles and that of the stator poles.
Claim 7
Dependent Claim
28 words
A motor according to claim 1, wherein the cross-section of said element between the bridges substantially corresponds to the area occupied by the windings of the field magnets.
Claim 8
Dependent Claim
29 words
A motor according to claim 2, wherein the cross-section of the short-circuit cage between the bridges substantially corresponds to the area occupied by the windings of the field magnets.
Claim 9
Dependent Claim
34 words
The motor of claim 2 further comprising: a first magnetic short-circuiting ring connecting the cores of said first stator portion; and, a second magnetic short-circuiting ring connecting the cores of said second stator portion.
Claim 10
Dependent Claim
14 words
A motor according to claim 1, wherein the bridges consist of laminated silicon-iron sheets.
Claim 11
Dependent Claim
18 words
A motor according to claim 1, wherein the windings of the field magnets consist of wound aluminum strip.
Claim 12
Dependent Claim
16 words
A motor according to claim 1, said motor being in the form of a linear motor.
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) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |