US3750002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery connected dynamo electric machine system
Assignee: Robert Bosch GmbH
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Filing: 1972-09-15
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Granted: 1973-07-31
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Expires: 1992-09-15
Abstract
Abstract To provide for low-loss operation of a dynamo electric machine in motor mode from a battery, and to provide for feedback of energy into the battery in generator mode, a bridge-circuit includes four thyristors connected across a diagonal to the battery, one branch being the supply branch and including a motor mode supply thyristor and a generator mode supply thyristor, in series, and the other branch including a pair of extinction thristors; an inductance and capacitor are connected, in series, across the other diagonal of the bridge to provide a commutating circuit, the armature of the dynamo electric machine being connected in parallel with one of the thyristors in the operating branch. A pair of diodes or suitably triggered thyristors are preferably additionally connected across the battery and having their junction connected to the armature so that one of the diodes, or thyristors, is in connection with the armature to provide for feedback of current into the battery when in generator mode operation.
Inventors
- 👤 A Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:13
CPC Classifications
B; B60; B60L; B60L7/00; B60L7/003; H; H02; H02P; H02P3/00; H02P3/06; H02P3/08; H02P3/14; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/29; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y10; Y10S; Y10S320/00; Y10S320/34
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
170 words
Battery connected dynamo electric machine system in which a dc shunt dynamo electric machine is connected to a battery to be supplied with current from the battery when the machine is in motor mode of operation and to supply current to the battery when the machine is in generator mode of operation, comprising a bridge circuit including four thyristors (13, 14, 15, 16) connected at one diagonal to the battery and forming a pair of parallel branches having one branch forming the operating branch and having a series connected motor mode supply thyristor (13) and a generator mode supply thyristor (15) and another branch forming an extinction thyristor branch (14, 16); and a commutating circuit including a commutating capacitor (17) and an inductance (18), the junctions (24, 25) between the series-connected thyristors of the pairs and forming the other diagonals of the bridge being connected to said commutating circuit; the armature (11) of the dynamo electric machine being connected in parallel with one of the thyristors of the operating branch.
Claim 2
Dependent Claim
170 words
Battery connected dynamo electric machine system in which a dc shunt dynamo electric machine is connected to a battery to be supplied with current from the battery when the machine is in motor mode of operation and to supply current to the battery when the machine is in generator mode of operation, comprising a bridge circuit including four thyristors (13, 14, 15, 16) connected at one diagonal to the battery and forming a pair of parallel branches having one branch forming the operating branch and having a series connected motor mode supply thyristor (13) and a generator mode supply thyristor (15) and another branch forming an extinction thyristor branch (14, 16); and a commutating circuit including a commutating capacitor (17) and an inductance (18), the junctions (24, 25) between the series-connected thyristors of the pairs and forming the other diagonals of the bridge being connected to said commutating circuit; the armature (11) of the dynamo electric machine being connected in parallel with one of the thyristors of the operating branch.
Claim 3
Dependent Claim
71 words
System according to claim 1 wherein the motor mode supply thyristor in the operating branch is triggered to be conductive when the system is in motor mode of operation and the generator mode supply thyristor of the operating branch is triggered to be conductive when the dynamo electric machine is in generator mode of operation; and wherein the armature (11) is connected in parallel with the generator mode supply thyristor (15).
Claim 4
Dependent Claim
69 words
System according to claim 1 further comprising a series circuit formed of a pair of diodes (19, 20) having a common junction (26) there between and connected across the terminals of the battery and poled in blocking direction; and a saturable choke (21) being connected to the junction (25) of the motor mode supply thyristor and the generator mode supply thyristor and the common junction (26) of the diodes.
Claim 5
Dependent Claim
92 words
System according to claim 1 further comprising a series circuit formed of a pair of uni-directional current conductive means (19, 20; 29, 30) having a junction (26) therebetween and connected across the terminal of the battery, and poled in blocking direction; and means connecting the common junction (26) of one of said uni-directional current conductive means (19, 29) to one of the terminals of the battery, one of the terminals of the armature being connected to the other terminal of the battery to permit current flow from the armature to the battery.
Claim 6
Dependent Claim
51 words
System according to claim 4 wherein the unidirectional current conductive means comprises a pair of thyristors (29, 30) having their main current path poled in blocking direction with respect to the battery; the common junction (26) between the thyristors (29, 30) being connected directly to the other terminal of the armature.
Claim 7
Dependent Claim
75 words
System according to claim 5 further comprising a source of trigger potential (50, 52) to respectively fire the supply thyristors (13, 15) and the extinction thyristors (14, 16) in alternate cycles, said source being additionally connected to synchronously provide triggering pulses to a respective one of said bypass thyristors upon firing of a extinction thyristor to permit current flow from the armature to a respective thyristor when current flow through the supply thyristor is inhibited.
Claim 8
Dependent Claim
82 words
System according to claim 6 wherein one of the extinction thyristors controls quenching of the generator mode supply thyristor to interrupt current being supplied by the armature (11) upon operation of the dynamo electric machine as a generator, said source of trigger potential applying, synchronously, pulses to the thyristor (29) connecting the armature to the battery upon extinction of the generator supply thyristor to release energy stored magnetically in the armature in the form of electrical energy for storage in the battery.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |