CA1078908A - Counter-rotation electric motor - Google Patents
Counter-rotation electric motorInfo
- Publication number
- CA1078908A CA1078908A CA258,086A CA258086A CA1078908A CA 1078908 A CA1078908 A CA 1078908A CA 258086 A CA258086 A CA 258086A CA 1078908 A CA1078908 A CA 1078908A
- Authority
- CA
- Canada
- Prior art keywords
- field
- rotor
- armature
- commutation
- ring
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
- H02K23/60—Motors or generators having rotating armatures and rotating excitation field
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Dc Machiner (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An electric motor including a rotary armature and an annular field mounted for rotation around said armature and geared to said armature by way of planetary gearing fixed to the housing whereby the opposing torques of the field and the armature are summed at the motor output shaft. Such counter-rotating field arrangement provides for an increase in the flux cutting speed of the motor while, at the same time, maintaining the angular rate of the armature at a speed which is compatible with the containment of the centrifugal forces thereof. Both the armature and the field include concentric commutation rings at one end of the motor such that the field coils and the armature coils are excited at a predetermined phase angle by a plurality of field and armature brushes. Two adjustable rings are provided to carry respectively said field and armature brushes. Adjustment of the rings achieves control of the relative phase angle between the excitation of one winding and the other according to the relative angular alignment thereof.
An electric motor including a rotary armature and an annular field mounted for rotation around said armature and geared to said armature by way of planetary gearing fixed to the housing whereby the opposing torques of the field and the armature are summed at the motor output shaft. Such counter-rotating field arrangement provides for an increase in the flux cutting speed of the motor while, at the same time, maintaining the angular rate of the armature at a speed which is compatible with the containment of the centrifugal forces thereof. Both the armature and the field include concentric commutation rings at one end of the motor such that the field coils and the armature coils are excited at a predetermined phase angle by a plurality of field and armature brushes. Two adjustable rings are provided to carry respectively said field and armature brushes. Adjustment of the rings achieves control of the relative phase angle between the excitation of one winding and the other according to the relative angular alignment thereof.
Description
~078908 ~ he present invention relates to an electric motor.
According to the present invention there is provided an electric motor having both a wound field and wound rotor, counter-rotating means disposed between said rotor and field for rendering said field rotatable in a direction opposite to the rotation of said rotor; commutation means on said field and rotor, said commutation means including a field commutation ring selectively connecting predetermined ones of said windings for excitation and a rotor commutation ring for exciting pre-determined other ones of said windings; a casing support ng in rotation with said field and rotor; and brush means disposed in said casing for providing electrical connection to said commutation means, said brush means including two adjustable rings mounted for rotation on said motor, each ring including a corresponding set of brushes for controlling the relatlve phase angle between the excitation of said one winding and said other winding according to the relative angular alignment thereof.
A constructional embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawings, wherein:-Figure 1 is a side view in section of an inventive electricmotor constructed according to the present invention;
Figure 2 is a sectional view taken along plane 2-2 of Figure l;
Figure 3 is yet another sectional view, taken along plane 3-3 of Figure l;
~ igure 4 is an end view of the device shown in Figure 1 illustrating a convenient arrangement of parts for manual control thereover; and 1 -~ - 2 - ~ .`
- . - .. , -,. . .
, Figure 5 i9 a gearing diagram illustrating the operation of the present device.
While particular reference is made herein to a counter-rotating electric motor arrange~ent, such as for purposes of illustration only. It is to be understood - 2a -J
' ::. . . '' ' . "" : " -, ' ~,, ' ` ~':.., ' ' :, . ' . , , . : . . . ' ' ~)7~390~
that various other implementations of the basic concept are possible and no intent to limit the scope of the invention is expressed by the selection of the example herein.
As shown in Figure 1 an electric motor, generally designated by the numeral 10~ comprises a cylindrical housing 11 including two circular end plates 12 and 13 supporting, in rotation, a central shaft 15. End plate 12 furthermore includes a plurality of planetary gear mounting bolts 21 directed into the interior of housing 11 and disposed along a ring around the central axis of shaft 15, to support in rotation a plurality of planetary gears 22.
Formed on the central shaft 15, is a wound rotor or armature assembly 25 which is thus rotatable with the rotations of the sh~ft.
Arranged around armature 25 is an annular field 26 also wound, the field windings being secured at the periphery thereof within a cylindrical field shell 27 which, in turn, is supported for rotation about shaft 15.
More specifically, shell 27 comprises the section of a tube supported at one end on a bearing plate 28 which, across a bearing 29, centers the shell 27 with respect to the shaft 15.
Formed along the exterior peripheral surface of bearing plate 28 is a flange or ring gear 30 including a plurality of inwardly directed teeth 30(a) which, in turn, engage the teeth of the planetary gears 22. Planetary gears 22 furthermore are in constant mesh with a central gear 31 mounted on shaft 15 distal of bearing 29. In this manner a counter-rotating gear arrangement is achieved between the .
~07~90b~
armature 25 and the field 26.
The other end of field shell 27 is similarly supported in rotation on shaft 15 by a bearing 37 seated in a bearing plate 38 and engaging an opposing flange 36 formed on the shaft.
To facilitate assembly bearing plate 28 includes, around the periphery thereof, a plurality of bores 41, each receiving a bolt 42 which, in turn, threadably engages the adjacent edge of the shell 27.
The seating arrangement of bearing 29 in the bearing -plate 28 is achieved by a bearing seat 43 conformed to receive the exterior race of the bearing 29 which is opposed by a retainer ring 44 on the other side of the bearing. At the other end, the bearing plate 38 is seated against a circular shoulder 48 formed on the interior of shell 27 and is secured thereat by an insulating washer 49 opposing a spacer ring 51.
As shown in Figures 1 and 3, ring 51, in turn, is compressed by retaining cap 52 which again, by way of bolts 53 is secured to the edge of shell 27. Attached to the ~ -~
interior of ring 51, between the retaining washer 49 and the cap 52, are a plurality of inwardly directed commutating segments 55 which selectively connect the various windings in the field 26 to four field brushes lOl, 102~ 103 and 104.
In a similar arrangement a plurality of commutation segments 65 are retained around the exterior periphery of an insulating spacer 61 which, in turn, is attached to an insulating washer 62 abutting flange 36. Commutating segments 65, in - . -, :. :. . .
1078~0~
turn, select for excitation the particular coils in the armature 25 by the selective contact with four armature brushes 111,112,113 and 114. Brushes 101-104 are, in turn, mounted on a field brush ring 105 which is mounted for rotation in the end plate 13 along an interior armature brush ring 115 supporting brushes 111-114. As shown in Figure 5, rings 105 and 115 are provided with handles 106 and 116 for articulation~ thus allowing for adjustment in the commutation phasing between the counter rotating armature and fiéld~ In this manner various levels of torque out-put can be acheived ~y a simple manual adjustment.
Attached to ring 105 and separated from brushes 101-104 by an increment of arc slightly greater than the arc -dimension of one field commutation segment 55 are an additional four pick-up brushes 107-110 which~ according to the arrow A, are phased to lag the excitation brushes 101-104 to pick up the collapsing field transient. In similar arrangement, but phased in the counter rotating direction of arrow B ring 115 supports four brushes 117-120 which, in turn, pick up the collapsing field in the armature.
~078908 By reference to Figure 4, the torquing arrangement between ring gear 30 and gear 31 is illustrated. Specifically shown schematically, on the exterior of the rin~ ~ear 30 to the winding 269. A similar winding 251 is shown alon~
gear 31 indicating one armature winding. Developed between windings 251 and 261 is a force field F which resolves itself into a tangential couple T around the planetary gear 22.
Thus, the armature torque is additive with the moment around gear 22 increasing the total torque output of the motor.
Some of the many advantages of the present invention should now be readily apparent. ~he invention provides by means convenient in production, an arrangement which both increases the motor torque and which furthermore recovers part of the collapsing field losses to thus increase the -efficiency of the motor.
Obviously many modifications and variations to the above disclosure can be made without departing from the spirit of the invention. It is therefore intended that the scope of the invention be determined solely dependent on the claims hereto. ' ~i,, ,: .
According to the present invention there is provided an electric motor having both a wound field and wound rotor, counter-rotating means disposed between said rotor and field for rendering said field rotatable in a direction opposite to the rotation of said rotor; commutation means on said field and rotor, said commutation means including a field commutation ring selectively connecting predetermined ones of said windings for excitation and a rotor commutation ring for exciting pre-determined other ones of said windings; a casing support ng in rotation with said field and rotor; and brush means disposed in said casing for providing electrical connection to said commutation means, said brush means including two adjustable rings mounted for rotation on said motor, each ring including a corresponding set of brushes for controlling the relatlve phase angle between the excitation of said one winding and said other winding according to the relative angular alignment thereof.
A constructional embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawings, wherein:-Figure 1 is a side view in section of an inventive electricmotor constructed according to the present invention;
Figure 2 is a sectional view taken along plane 2-2 of Figure l;
Figure 3 is yet another sectional view, taken along plane 3-3 of Figure l;
~ igure 4 is an end view of the device shown in Figure 1 illustrating a convenient arrangement of parts for manual control thereover; and 1 -~ - 2 - ~ .`
- . - .. , -,. . .
, Figure 5 i9 a gearing diagram illustrating the operation of the present device.
While particular reference is made herein to a counter-rotating electric motor arrange~ent, such as for purposes of illustration only. It is to be understood - 2a -J
' ::. . . '' ' . "" : " -, ' ~,, ' ` ~':.., ' ' :, . ' . , , . : . . . ' ' ~)7~390~
that various other implementations of the basic concept are possible and no intent to limit the scope of the invention is expressed by the selection of the example herein.
As shown in Figure 1 an electric motor, generally designated by the numeral 10~ comprises a cylindrical housing 11 including two circular end plates 12 and 13 supporting, in rotation, a central shaft 15. End plate 12 furthermore includes a plurality of planetary gear mounting bolts 21 directed into the interior of housing 11 and disposed along a ring around the central axis of shaft 15, to support in rotation a plurality of planetary gears 22.
Formed on the central shaft 15, is a wound rotor or armature assembly 25 which is thus rotatable with the rotations of the sh~ft.
Arranged around armature 25 is an annular field 26 also wound, the field windings being secured at the periphery thereof within a cylindrical field shell 27 which, in turn, is supported for rotation about shaft 15.
More specifically, shell 27 comprises the section of a tube supported at one end on a bearing plate 28 which, across a bearing 29, centers the shell 27 with respect to the shaft 15.
Formed along the exterior peripheral surface of bearing plate 28 is a flange or ring gear 30 including a plurality of inwardly directed teeth 30(a) which, in turn, engage the teeth of the planetary gears 22. Planetary gears 22 furthermore are in constant mesh with a central gear 31 mounted on shaft 15 distal of bearing 29. In this manner a counter-rotating gear arrangement is achieved between the .
~07~90b~
armature 25 and the field 26.
The other end of field shell 27 is similarly supported in rotation on shaft 15 by a bearing 37 seated in a bearing plate 38 and engaging an opposing flange 36 formed on the shaft.
To facilitate assembly bearing plate 28 includes, around the periphery thereof, a plurality of bores 41, each receiving a bolt 42 which, in turn, threadably engages the adjacent edge of the shell 27.
The seating arrangement of bearing 29 in the bearing -plate 28 is achieved by a bearing seat 43 conformed to receive the exterior race of the bearing 29 which is opposed by a retainer ring 44 on the other side of the bearing. At the other end, the bearing plate 38 is seated against a circular shoulder 48 formed on the interior of shell 27 and is secured thereat by an insulating washer 49 opposing a spacer ring 51.
As shown in Figures 1 and 3, ring 51, in turn, is compressed by retaining cap 52 which again, by way of bolts 53 is secured to the edge of shell 27. Attached to the ~ -~
interior of ring 51, between the retaining washer 49 and the cap 52, are a plurality of inwardly directed commutating segments 55 which selectively connect the various windings in the field 26 to four field brushes lOl, 102~ 103 and 104.
In a similar arrangement a plurality of commutation segments 65 are retained around the exterior periphery of an insulating spacer 61 which, in turn, is attached to an insulating washer 62 abutting flange 36. Commutating segments 65, in - . -, :. :. . .
1078~0~
turn, select for excitation the particular coils in the armature 25 by the selective contact with four armature brushes 111,112,113 and 114. Brushes 101-104 are, in turn, mounted on a field brush ring 105 which is mounted for rotation in the end plate 13 along an interior armature brush ring 115 supporting brushes 111-114. As shown in Figure 5, rings 105 and 115 are provided with handles 106 and 116 for articulation~ thus allowing for adjustment in the commutation phasing between the counter rotating armature and fiéld~ In this manner various levels of torque out-put can be acheived ~y a simple manual adjustment.
Attached to ring 105 and separated from brushes 101-104 by an increment of arc slightly greater than the arc -dimension of one field commutation segment 55 are an additional four pick-up brushes 107-110 which~ according to the arrow A, are phased to lag the excitation brushes 101-104 to pick up the collapsing field transient. In similar arrangement, but phased in the counter rotating direction of arrow B ring 115 supports four brushes 117-120 which, in turn, pick up the collapsing field in the armature.
~078908 By reference to Figure 4, the torquing arrangement between ring gear 30 and gear 31 is illustrated. Specifically shown schematically, on the exterior of the rin~ ~ear 30 to the winding 269. A similar winding 251 is shown alon~
gear 31 indicating one armature winding. Developed between windings 251 and 261 is a force field F which resolves itself into a tangential couple T around the planetary gear 22.
Thus, the armature torque is additive with the moment around gear 22 increasing the total torque output of the motor.
Some of the many advantages of the present invention should now be readily apparent. ~he invention provides by means convenient in production, an arrangement which both increases the motor torque and which furthermore recovers part of the collapsing field losses to thus increase the -efficiency of the motor.
Obviously many modifications and variations to the above disclosure can be made without departing from the spirit of the invention. It is therefore intended that the scope of the invention be determined solely dependent on the claims hereto. ' ~i,, ,: .
Claims (4)
1. In an electric motor having a field and rotor that each has windings thereof, the improvement comprising:
(a) counter-rotating means disposed between said rotor and field for rendering said field rotatable in a direction opposite to the rotation of said rotor;
(b) commutation means on said field and rotor, said commutation means including a field commutation ring selectively connecting predetermined ones of said windings for excitation and a rotor commutation ring for exciting predetermined other ones of said windings;
(c) a casing supporting in rotation with said field and rotor; and (d) brush means disposed in said casing for providing electrical connection to said commutation means, said brush means including two adjustable rings mounted for rotation on said motor, each ring including a corresponding set of brushes for controlling the relative phase angle between the excitation of said one winding and said other winding according to the relative angular alignment thereof.
(a) counter-rotating means disposed between said rotor and field for rendering said field rotatable in a direction opposite to the rotation of said rotor;
(b) commutation means on said field and rotor, said commutation means including a field commutation ring selectively connecting predetermined ones of said windings for excitation and a rotor commutation ring for exciting predetermined other ones of said windings;
(c) a casing supporting in rotation with said field and rotor; and (d) brush means disposed in said casing for providing electrical connection to said commutation means, said brush means including two adjustable rings mounted for rotation on said motor, each ring including a corresponding set of brushes for controlling the relative phase angle between the excitation of said one winding and said other winding according to the relative angular alignment thereof.
2. Apparatus according to Claim 1 in which said field commutation ring is connected for concurrent rotation with said field and said rotor commutation ring is connected for concurrent rotation with said rotor.
3. Apparatus according to Claim 2, in which said brush means further includes:
a plurality of first excitation brushes mounted in said motor and disposed for contact with said field commutation ring, a plurality of second excitation brushes mounted in said motor and disposed for contact with said rotor commutation ring, a source of electrical excitation connected to said first and second excitation brushes, and a plurality of first and second pick-up brushes disposed in said motor to contact respectively said field and rotor commutation rings in a lagging relationship with said first and second excitation brushes for operatively conducting the collapse transients in field and rotor to said excitation source.
a plurality of first excitation brushes mounted in said motor and disposed for contact with said field commutation ring, a plurality of second excitation brushes mounted in said motor and disposed for contact with said rotor commutation ring, a source of electrical excitation connected to said first and second excitation brushes, and a plurality of first and second pick-up brushes disposed in said motor to contact respectively said field and rotor commutation rings in a lagging relationship with said first and second excitation brushes for operatively conducting the collapse transients in field and rotor to said excitation source.
4. Apparatus according to Claim 1, wherein:
said counter -rotating means includes an inwardly directed ring gear formed along one end of said field, concentrically opposing pinion gear formed on said rotor, and a plurality of planetary gears mounted for rotating in said motor and disposed between said ring and pinion gears.
said counter -rotating means includes an inwardly directed ring gear formed along one end of said field, concentrically opposing pinion gear formed on said rotor, and a plurality of planetary gears mounted for rotating in said motor and disposed between said ring and pinion gears.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/623,717 US4056746A (en) | 1974-12-20 | 1975-10-20 | Counterrotation electric motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1078908A true CA1078908A (en) | 1980-06-03 |
Family
ID=24499149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA258,086A Expired CA1078908A (en) | 1975-10-20 | 1976-07-29 | Counter-rotation electric motor |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5251508A (en) |
| AU (1) | AU506421B2 (en) |
| CA (1) | CA1078908A (en) |
| FR (1) | FR2329095A1 (en) |
| GB (1) | GB1502542A (en) |
| IT (1) | IT1067671B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2642495B1 (en) * | 1989-01-31 | 1991-05-24 | Europ Propulsion | SINGLE-ENGINE COUNTER-ROTATION MECHANICAL STABILIZATION SYSTEM |
| FR2721149B1 (en) * | 1994-06-09 | 1996-08-30 | Mauff Gilbert Pierre Le | Electric motors with rotating inductors and armatures. |
| WO2006064354A1 (en) * | 2004-12-17 | 2006-06-22 | Dolphin Electric Holdings Inc | Rotating electric machine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2564741A (en) * | 1947-03-06 | 1951-08-21 | Vermillion Lewis Safford | Dynamoelectric machine |
| FR1006197A (en) * | 1947-11-29 | 1952-04-21 | Switching device for electrical machines | |
| FR1529504A (en) * | 1962-05-19 | 1968-06-21 | Electric traction motor | |
| FR1401385A (en) * | 1964-04-20 | 1965-06-04 | Alsthom Cgee | Electric machine with two rotors |
| FR1423943A (en) * | 1964-11-26 | 1966-01-07 | Electric motor | |
| FR1442478A (en) * | 1965-05-05 | 1966-06-17 | Electronique & Automatisme Sa | Motor structure for high uniform inducing magnetic field |
| DE1755494A1 (en) * | 1968-05-16 | 1971-11-11 | Ihle Werner Dipl Ing | Electric drive for transport vehicles |
-
1976
- 1976-01-16 GB GB174876A patent/GB1502542A/en not_active Expired
- 1976-03-10 JP JP2659476A patent/JPS5251508A/en active Pending
- 1976-03-19 FR FR7607991A patent/FR2329095A1/en active Granted
- 1976-07-29 CA CA258,086A patent/CA1078908A/en not_active Expired
- 1976-08-02 AU AU16464/76A patent/AU506421B2/en not_active Expired
- 1976-08-13 IT IT2630376A patent/IT1067671B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| GB1502542A (en) | 1978-03-01 |
| FR2329095B1 (en) | 1980-11-14 |
| JPS5251508A (en) | 1977-04-25 |
| FR2329095A1 (en) | 1977-05-20 |
| IT1067671B (en) | 1985-03-16 |
| AU506421B2 (en) | 1980-01-03 |
| AU1646476A (en) | 1978-02-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |