Patent US4386303A successfully refreshed from Google Patents.
US4386303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
D.C. Motor system for a gatling gun
Assignee: General Dynamics OTS Inc
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Filing: 1980-12-04
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Granted: 1983-05-31
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Expires: 2000-12-04
Abstract
Abstract A feature of this invention is the provision of a reversible, D.C. shunt field motor having an armature and two separate field windings, each field winding being capable of producing rated field flux. The motor is capable of bidirectional rotation having one field energizable for CW rotation and the other field energizable for CCW rotation. A servo system couples the two field windings and has only one active control element in the high current armature circuit to control the magnitude of the armature current, and two low power amplifiers, each low power amplifier having an active control element and each controlling the magnitude of the field flux (and thereby the magnitude of armature current under certain circumstances) in a given respective direction.
Inventors
- 👤 James A. Kleptz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:41
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/298; H02P7/2985; F; F41; F41A; F41A7/00; F41A7/02; F41A7/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
112 words
An electric motor system comprising: an armature winding; means for providing field flux; means for controlling current through said armature winding and including: means for controlling the polarity and the magnitude of said field flux, and means for supplying current to said armature winding; said means for controlling the polarity and the magnitude of said field flux including: means for providing a signal e 1 which is a control function for variable magnitude and polarity of field flux; means for providing a signal e 2 which is a function of magnitude and polarity of field flux; and means for minimizing the difference between signal e 1 and said signal e 2 .
Claim 2
Dependent Claim
112 words
An electric motor system comprising: an armature winding; means for providing field flux; means for controlling current through said armature winding and including: means for controlling the polarity and the magnitude of said field flux, and means for supplying current to said armature winding; said means for controlling the polarity and the magnitude of said field flux including: means for providing a signal e 1 which is a control function for variable magnitude and polarity of field flux; means for providing a signal e 2 which is a function of magnitude and polarity of field flux; and means for minimizing the difference between signal e 1 and said signal e 2 .
Claim 3
Dependent Claim
59 words
A system according to claim 1 wherein: said means for supplying current to said armature winding includes: means having: (a) a first mode of operation in which current from an external source is supplied to said armature winding, and (b) a second mode of operation in which said external source is disconnected and said armature is effectively short circuited.
Claim 4
Dependent Claim
51 words
A system according to claim 2 wherein: said means for supplying current to said armature winding further includes: means for controlling the magnitude of the current through said armature winding when said means having a first and a second mode of operation is in its first and second modes of operation.
Claim 5
Dependent Claim
216 words
An electric motor system comprising: an armature winding; means for providing field flux; means for controlling current through said armature winding and including; means for controlling the polarity and the magnitude of said field flux, and means for supplying current to said armature winding; said means for controlling the polarity and the magnitude of said field flux including: means for providing a signal e 1 ; means for receiving said signal e 1 and a second signal e 2 and for providing an output signal e 3 =e 1 -e 2 ; forward field winding means including: a forward pulse width modulator receiving said signal e 3 and controlling a forward field power amplifier which is coupled to a forward field winding; reverse field winding means including: a reverse pulse width modulator receiving said signal e 3 and controlling a reverse field power amplifier which is coupled by a reverse field winding; and means for receiving a signal which is a function of current i F1 through said forward field winding and for receiving a signal which is a function of current i F2 through said reverse field winding and for providing a signal K(i F1 -i F2 ) which is a function of the difference of said signals and is said signal e 2 .
Claim 6
Dependent Claim
216 words
An electric motor system comprising: an armature winding; means for providing field flux; means for controlling current through said armature winding and including; means for controlling the polarity and the magnitude of said field flux, and means for supplying current to said armature winding; said means for controlling the polarity and the magnitude of said field flux including: means for providing a signal e 1 ; means for receiving said signal e 1 and a second signal e 2 and for providing an output signal e 3 =e 1 -e 2 ; forward field winding means including: a forward pulse width modulator receiving said signal e 3 and controlling a forward field power amplifier which is coupled to a forward field winding; reverse field winding means including: a reverse pulse width modulator receiving said signal e 3 and controlling a reverse field power amplifier which is coupled by a reverse field winding; and means for receiving a signal which is a function of current i F1 through said forward field winding and for receiving a signal which is a function of current i F2 through said reverse field winding and for providing a signal K(i F1 -i F2 ) which is a function of the difference of said signals and is said signal e 2 .
Claim 7
Dependent Claim
117 words
A system according to claim 4 wherein: a first diode is coupled in shunt with said forward field winding; a second diode is coupled in shunt with said reverse field winding; said forward pulse width modulator drives said forward field power amplifier to provide current to said forward field winding when said signal e 3 is of one polarity, and any current induced in said reverse field winding flows through said second diode; and said reverse pulse width modulator drives said reverse field power amplifier to provide current to said reverse field winding when said signal e 3 is of the other polarity, and any current induced in said reverse field winding flows through said first diode.
Claim 8
Dependent Claim
76 words
A system according to claim 1 further including: means for receiving a signal e 4 which is a function of the actual rotational velocity of said armature, for receiving a signal e 5 which is a function for the desired rotational velocity of said armature, and for providing a signal to said means for providing signal e 6 which is a function of the difference of said signal e 4 and said signal e 5 .
Claim 9
Dependent Claim
119 words
A system according to claim 1 further including: means (a) for receiving; a signal e 4 which is a function of the actual rotational velocity of said armature, a signal e 5 which is a function for the desired rotational velocity of said armature, a signal e 7 whose polarity is that of said signal e 1 , a signal e 8 which is a function of the current through said armature winding reaching a predetermined limit, and (b) for providing to said means for providing signal e 1 , a signal e 7 , which is a function of said signal e 1 , and said signal e 8 , and which shall not exceed a predetermined magnitude.
Claim 10
Dependent Claim
120 words
A system according to claim 5 further including: means (a) for receiving a signal e 4 which is a function of the actual rotational velocity of said armature, a signal e 5 which is a function for the desired rotational velocity of said armature, a signal e 7 which is a function of the polarity of said signal e 1 , a signal e 8 which is a function of the current through said armature winding reaching a predetermined limit, and (b) for providing, to said means for providing signal e 1 , a signal e 7 , which is a function of said signal e 1 , andsaid signal e 8 and which shall not exceed a predetermined magnitude.
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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) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |