US3829752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic synchro drive system
Assignee: Singer Co
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Filing: 1973-03-16
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Granted: 1974-08-13
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Expires: 1993-03-16
Abstract
Abstract Described herein is an efficient, electronically damped drive system for a torque receiver synchro, which is to be randomly positioned at any one of several discrete positions. A coded input command is routed to a particular drive circuit, which corresponds to the location that the synchro is to be positioned. The drive system, through a pair of bi-directional, AC switches, connects a pair of windings of a multi-tapped transformer to each of the appropriate windings on the synchro. The windings of the multi-tapped transformer which are selected have voltages and phase relationship which are pre-determined and which correspond to the synchro winding excitation voltage required to position the synchro at the location identified with the coded input command. The drive circuitry includes a feature which upon reaching the desired position allows for the continuous application of the particular voltages to the appropriate synchro windings until positive reset action is initiated prior to an update in synchro position. Additionally, a unique electronic damping circuit is provided which ''''kicks'''' the synchro in discrete steps by providing a source of controlled drive pulses for the drive circuitry. The pulses are controlled as to number, frequency, and duty cycle so as to provide a smooth transition from one position to the next. After the ''''kick'''' pulses have smoothly repositioned the synchro, full energy is then automatically applied to the appropriate synchro windings so as to firmly lock the position of the synchro.
Inventors
- 👤 F Martines
- 👤 P Spahr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:23
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/38; G08C19/46; G08C19/48; H; H03; H03M; H03M1/00; H03M1/66; H03M1/74
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
270 words
An electronic drive system for positioning torque receiver syncros which comprises: A. converter means for receiving position input data and converting said input data to a suitable code; B. at least one multi-output transformer including: 1. a primary winding connected to a primary a-c voltage, and 2. a plurality of secondary windings producing a plurality of predetermined secondary a-c voltages; C. drive circuit means for connecting a particular group of said secondary a-c voltages to the stator windings of said syncros in response to said code, said drive circuit means comprising: 1. a plurality of bi-directional switches coupling said secondary voltages and said syncro windings; 2. bi-directional switch drive means including means for energizing said directional switches in response to said code, means for deenergizing said energizing means in response to said code and means for maintaining said bi-directional switches in the energized state after said torque receiver syncros have been positioned in response to said code; 3. oscillator means for providing positioning pulses of predetermined frequency and pulse width; 4. counter means for counting the number of positioning pulses generated, said counter means including means generating a turn-off signal when the number of positioning pulses reaches a predetermined number and means for initially resetting said counter means in response to said code; 5. means for turning on said oscillator means in response to said code; 6. means for turning off said oscillator means in response to said turn-off signals; and 7. means responsive to said code for generating a predetermined number of the reset pulses, said reset pulses being fed to the deenergizing means of said bi-directional drive means.
Claim 2
Dependent Claim
270 words
An electronic drive system for positioning torque receiver syncros which comprises: A. converter means for receiving position input data and converting said input data to a suitable code; B. at least one multi-output transformer including: 1. a primary winding connected to a primary a-c voltage, and 2. a plurality of secondary windings producing a plurality of predetermined secondary a-c voltages; C. drive circuit means for connecting a particular group of said secondary a-c voltages to the stator windings of said syncros in response to said code, said drive circuit means comprising: 1. a plurality of bi-directional switches coupling said secondary voltages and said syncro windings; 2. bi-directional switch drive means including means for energizing said directional switches in response to said code, means for deenergizing said energizing means in response to said code and means for maintaining said bi-directional switches in the energized state after said torque receiver syncros have been positioned in response to said code; 3. oscillator means for providing positioning pulses of predetermined frequency and pulse width; 4. counter means for counting the number of positioning pulses generated, said counter means including means generating a turn-off signal when the number of positioning pulses reaches a predetermined number and means for initially resetting said counter means in response to said code; 5. means for turning on said oscillator means in response to said code; 6. means for turning off said oscillator means in response to said turn-off signals; and 7. means responsive to said code for generating a predetermined number of the reset pulses, said reset pulses being fed to the deenergizing means of said bi-directional drive means.
Claim 3
Dependent Claim
44 words
a plurality of secondary windings producing a plurality of predetermined secondary a-c voltages; C. drive circuit means for connecting a particular group of said secondary a-c voltages to the stator windings of said syncros in response to said code, said drive circuit means comprising:
Claim 4
Dependent Claim
44 words
a plurality of secondary windings producing a plurality of predetermined secondary a-c voltages; C. drive circuit means for connecting a particular group of said secondary a-c voltages to the stator windings of said syncros in response to said code, said drive circuit means comprising:
Claim 5
Dependent Claim
51 words
bi-directional switch drive means including means for energizing said directional switches in response to said code, means for deenergizing said energizing means in response to said code and means for maintaining said bi-directional switches in the energized state after said torque receiver syncros have been positioned in response to said code;
Claim 6
Dependent Claim
51 words
bi-directional switch drive means including means for energizing said directional switches in response to said code, means for deenergizing said energizing means in response to said code and means for maintaining said bi-directional switches in the energized state after said torque receiver syncros have been positioned in response to said code;
Claim 7
Dependent Claim
28 words
bi-directional switch drive means including means for energizing said bi-direction switches in response to said code and means for deenergizing said energizing means in response to said code;
Claim 8
Dependent Claim
28 words
bi-directional switch drive means including means for energizing said bi-direction switches in response to said code and means for deenergizing said energizing means in response to said code;
Claim 9
Dependent Claim
76 words
An electronic drive system for positioning torque receiver signals which comprise: A. converter meAns for receiving position input data and converting said input data to a suitable code; B. means for transforming a primary a-c voltage to a plurality of predetermined secondary a-c voltages; and C. drive circuit means for connecting a particular group of said secondary a-c voltages to the stator windings of said syncros in response to said code, said drive circuit means comprising:
Claim 10
Dependent Claim
76 words
An electronic drive system for positioning torque receiver signals which comprise: A. converter meAns for receiving position input data and converting said input data to a suitable code; B. means for transforming a primary a-c voltage to a plurality of predetermined secondary a-c voltages; and C. drive circuit means for connecting a particular group of said secondary a-c voltages to the stator windings of said syncros in response to said code, said drive circuit means comprising:
Claim 11
Dependent Claim
82 words
The system of claim 2 wherein said positioning pulse generating means includes: A. oscillator means for generating pulses of predetermined frequency and pulse width; B. counter means for counting the number of pulses generated, said counter means including means for generating a turn-off signal when the number of said pulses reach said predetermined number; C. means for turning on said oscillator means in response to said code; and D. means for turning off said oscillator means in response to said turn-off signal.
Claim 12
Dependent Claim
23 words
means responsive to said code for generating a predetermined number of positioning pulses said positioning pulses being fed to said energizing means; and
Claim 13
Dependent Claim
23 words
means responsive to said code for generating a predetermined number of positioning pulses said positioning pulses being fed to said energizing means; and
Claim 14
Dependent Claim
12 words
oscillator means for providing positioning pulses of predetermined frequency and pulse width;
Claim 15
Dependent Claim
12 words
oscillator means for providing positioning pulses of predetermined frequency and pulse width;
Claim 16
Dependent Claim
42 words
counter means for counting the number of positioning pulses generated, said counter means including means generating a turn-off signal when the number of positioning pulses reaches a predetermined number and means for initially resetting said counter means in response to said code;
Claim 17
Dependent Claim
42 words
counter means for counting the number of positioning pulses generated, said counter means including means generating a turn-off signal when the number of positioning pulses reaches a predetermined number and means for initially resetting said counter means in response to said code;
Claim 18
Dependent Claim
22 words
means responsive to said code for generating a predetermined number of reset pulses, said reset pulses being fed to said deenergizing means.
Claim 19
Dependent Claim
22 words
means responsive to said code for generating a predetermined number of reset pulses, said reset pulses being fed to said deenergizing means.
Claim 20
Dependent Claim
20 words
The system of claim 3 which further comprises: means for initially resetting said counter means in response to said code.
Claim 21
Dependent Claim
12 words
means for turning on said oscillator means in response to said code;
Claim 22
Dependent Claim
12 words
means for turning on said oscillator means in response to said code;
Claim 23
Dependent Claim
14 words
means for turning off said oscillator means in response to said turn-off signals; and
Claim 24
Dependent Claim
14 words
means for turning off said oscillator means in response to said turn-off signals; and
Claim 25
Dependent Claim
28 words
means responsive to said code for generating a predetermined number of the reset pulses, said reset pulses being fed to the deenergizing means of said bi-directional drive means.
Claim 26
Dependent Claim
28 words
means responsive to said code for generating a predetermined number of the reset pulses, said reset pulses being fed to the deenergizing means of said bi-directional drive means.
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |