Patent US5164622A successfully refreshed from Google Patents.
US5164622A
Expired / Lapsed
US
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High pole density three phase motor
Assignee: Applied Motion Products Inc
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Filing: 1990-06-14
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Granted: 1992-11-17
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Expires: 2010-06-14
Abstract
Abstract A three phase DC motor (10) including a rotor portion (12) and a stator portion (16). The rotor portion (12) includes 6N±2 permanent magnet poles (32), and the stator portion(16) includes 6N electromagnet poles where N in an integer. The motor (10) is characterized in that it has a high pole density, thus enabling improved efficiency, while retaining acceptable non constant torque characteristics. Since the inventive motor configuration provides for a symmetrical winding pattern, no assymetrical radial forces are produced. The inventive configuration further allows for small motor size in the height dimension. A first preferred embodiment of the motor (10) is adapted for three phase power to be connected to the motor windings (50), (56) and (58) in a "Y" fashion. An alternate preferred embodiment of the invention (610) has coil windings (650), (656) and (658) connected in delta configuration.
Inventors
- 👤 Jeffrey A. Kordik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:29
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/28; H02K29/00; H02K29/06; H02K29/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
208 words
An improved direct current electric motor comprising: a rotor portion including a ferromagnetic ring magnet divided into 6N±2 alternately polarized permanently magnetized zones of equal size and shape, where N is any positive integer greater than 1 ; a stator portion including a rigid magnetically conducting stator core and a plurality of conducting windings wrapped thereabout, the stator core including 6N of symmetrically arrayed pole portions of equal size; rotational means for allowing said rotor portion to rotate with respect to said stator portion, and for transferring power from the motor; and electrical power and control means for operating the motor, wherein; said pole portions are arranged such that there is a plurality of opposing pairs of said pole portions, said opposing pairs each comprising two of said pole portions which are diametrically opposed across a circumference of said stator core; said plurality of conducting windings includes a first winding wire, a second winding wire and a third winding wire, with each of said first, second and third winding wires being wrapped around 6N/3 of said poles such that: each of said first winding wire, said second winding wire and said third winding wire is wrapped around at least one of said opposing pairs of said pole portions.
Claim 2
Dependent Claim
208 words
An improved direct current electric motor comprising: a rotor portion including a ferromagnetic ring magnet divided into 6N±2 alternately polarized permanently magnetized zones of equal size and shape, where N is any positive integer greater than 1 ; a stator portion including a rigid magnetically conducting stator core and a plurality of conducting windings wrapped thereabout, the stator core including 6N of symmetrically arrayed pole portions of equal size; rotational means for allowing said rotor portion to rotate with respect to said stator portion, and for transferring power from the motor; and electrical power and control means for operating the motor, wherein; said pole portions are arranged such that there is a plurality of opposing pairs of said pole portions, said opposing pairs each comprising two of said pole portions which are diametrically opposed across a circumference of said stator core; said plurality of conducting windings includes a first winding wire, a second winding wire and a third winding wire, with each of said first, second and third winding wires being wrapped around 6N/3 of said poles such that: each of said first winding wire, said second winding wire and said third winding wire is wrapped around at least one of said opposing pairs of said pole portions.
Claim 3
Dependent Claim
100 words
The improved motor of claim 1, wherein: said first winding wire, said second winding wire and said third winding wire are connected in a Y configuration by being joined at a Y junction point such that each of said winding wires has a junction end which is connected at said Y junction point and a free end; and each of said first winding wire, said second winding wire and said third winding wire is connected at its free end to one each of an A phase, a B phase and a C phase leg of a three phase power source.
Claim 4
Dependent Claim
104 words
The improved motor of claim 1, wherein: said first, second and third winding wires are connected in a delta configuration by joining said first winding wire to said second winding wire at a first junction point, said second winding wire to said third winding wire at a second junction point, and said third winding wire to said first winding wire at a third junction point; and each of said first junction point, said second junction point and said third junction point is connected to one each of an A phase, a B phase and a C phase leg of a three phase power source.
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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) | 1995-11-17 | 1996-05-18 | 1996-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-17 | 2000-05-18 | 2000-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-17 | 2004-05-18 | 2004-11-17 | $7700.00 | Window Closed / Lapsed |