US3586938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase-sensitive servomotor
Assignee: Individual
•
Filing: 1970-04-27
•
Granted: 1971-06-22
•
Expires: 1990-04-27
Abstract
Abstract AC energized servomotor having an angular response which is proportional to the phase of an input one-phase signal referred to the AC one-phase supply current. This servomotor includes two p-phase synchronous motors each comprising a first member bearing field windings and a second member bearing a magnetic armature cooperating with the field windings, one of the first and second members of one motor being held stationary and the other member being rotatable and both the first and second members of the other motor being rotatable. Means are provided for coupling together the rotatable member of the said one motor and either of the first and second members of the said other motor, and for deriving from the input one-phase signal an input p-phase signal and from the one-phase supply current a p-phase supply current. The field windings of the said one motor are energized by the pphase supply current and the field windings of the said other motor by the servomotor input p-phase signal, so that the member of the said other motor which is not coupled to the rotatable member of the said one motor takes up an angular position proportional to the phase of the input one-phase signal.
Inventors
- 👤 Jean-Claude Le Gall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:12
CPC Classifications
H; H02; H02K; H02K26/00; H02K99/00; H02K99/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
202 words
An AC energized servomotor having an angular response which is proportional to the phase of an input one-phase signal referred to the AC one-phase supply current, such servomotor including two p-phase synchronous motors each comprising a first member bearing field windings and a second member bearing a magnetic armature cooperating with the field windings, one of the first and second members of one motor being held stationary and the other member being rotatable and both the first and second members of the other motor being rotatable, means coupling together the rotatable member of the said one motor and either of the first and second members of the said other motor, means for deriving from the input one-phase signal an input p-phase signal and from the one-phase supply current a p-phase supply current, and means for energizing the field windings of the said one motor by the p-phase supply current and for energizing the field windings of the said other motor by the servomotor input p-phase signal, so that the member of the said other motor which is not coupled to the rotatable member of the said one motor takes up an angular position proportional to the phase of the input one-phase signal.
Claim 2
Dependent Claim
202 words
An AC energized servomotor having an angular response which is proportional to the phase of an input one-phase signal referred to the AC one-phase supply current, such servomotor including two p-phase synchronous motors each comprising a first member bearing field windings and a second member bearing a magnetic armature cooperating with the field windings, one of the first and second members of one motor being held stationary and the other member being rotatable and both the first and second members of the other motor being rotatable, means coupling together the rotatable member of the said one motor and either of the first and second members of the said other motor, means for deriving from the input one-phase signal an input p-phase signal and from the one-phase supply current a p-phase supply current, and means for energizing the field windings of the said one motor by the p-phase supply current and for energizing the field windings of the said other motor by the servomotor input p-phase signal, so that the member of the said other motor which is not coupled to the rotatable member of the said one motor takes up an angular position proportional to the phase of the input one-phase signal.
Claim 3
Dependent Claim
64 words
An AC energized servomotor as set forth in claim 1 including two two-phase synchronous motors in which the field windings of one motor are energized by the AC one-phase supply current and by the same AC current in phase quadrature and the field windings of the other motor are energized by the servomotor input one-phase signal and by the same signal in phase quadrature.
Claim 4
Dependent Claim
88 words
An AC energized servomotor as set forth in claim 1 in which the first member of the first motor bears field windings and is held stationary, the second member of said first motor bears a magnetic armature cooperating with said field windings and is rotatable, the first member of the second motor bears field windings and is rotatable and connected to the second member of the first motor and the second member of the second motor bears a magnetic armature cooperating with said magnetic field and is rotatable.
Claim 5
Dependent Claim
88 words
An AC energized servomotor as set forth in claim 1 in which the first member of the first motor bears field windings and is rotatable, the second member of said first motor bears a magnetic armature cooperating with said field windings and is held stationary, the first member of the second motor bears field windings and is rotatable and connected to the first member of the first motor and the second member of the second motor bears a magnetic armature cooperating with said magnetic field and is rotatable.
Claim 6
Dependent Claim
88 words
An AC energized servomotor as set forth in claim 1 in which the first member of the first motor bears field windings and is held stationary, the second member of said first motor bears a magnetic armature cooperating with said field windings and is rotatable, the first member of the second motor bears field windings and is rotatable and the second member of the second motor bears a magnetic armature cooperating with said magnetic field and is rotatable and connected to the second member of the first motor.
Claim 7
Dependent Claim
88 words
An AC energized servomotor as set forth in claim 1 in which the first member of the first motor bears field windings and is rotatable, the second member of said first motor bears a magnetic armature cooperating with said field windings and is held stationary, the first member of the second motor bears field windings and is rotatable and the second member of the second motor bears a magnetic armature cooperating with said magnetic field and is rotatable and connected to the first member of the first motor.
Claim 8
Dependent Claim
20 words
An AC energized servomotor as set forth in claim 1 wherein the p-phase synchronous motors are of the hySteresis kind.
Claim 9
Dependent Claim
20 words
An AC energized servomotor as set forth in claim 1 wherein the p-phase synchronous motors are of the variable-reluctance kind.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |