US4019108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive equipment supplied with direct current
Assignee: ABB Norden Holding AB
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Filing: 1976-01-08
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Granted: 1977-04-19
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Expires: 1996-01-08
Abstract
Abstract Drive equipment supplied with direct current, which includes a DC motor with a series field winding and with a semi-conductor rectifier arrangement in parallel with the field winding and working in pulse operation for variable shunting of the field winding. The controllable semi-conductor rectifier has a reactor connected in series with it. A load object is connected in parallel to the semi-conductor rectifier. The load object may be an accumulator battery series-connected with a second semi-conductor rectifier which blocks the battery voltage.
Inventors
- 👤 Sten Elvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:24
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/282; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/917
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
59 words
Drive equipment supplied with direct current, having a DC motor with a series field winding and means connecting a controllable semi-conductor rectifier working in pulse operation and a reactor in series with each other and in parallel with the field winding, for variable shunting of the field winding, means connecting a load object in parallel to the semi-conductor rectifier.
Claim 2
Dependent Claim
59 words
Drive equipment supplied with direct current, having a DC motor with a series field winding and means connecting a controllable semi-conductor rectifier working in pulse operation and a reactor in series with each other and in parallel with the field winding, for variable shunting of the field winding, means connecting a load object in parallel to the semi-conductor rectifier.
Claim 3
Dependent Claim
18 words
Drive equipment supplied with direct current according to claim 1, in which the load object comprises a resistor.
Claim 4
Dependent Claim
21 words
Drive equipment supplied with direct current according to claim 2, in which a capacitor is connected in parallel with the resistor.
Claim 5
Dependent Claim
31 words
Drive equipment supplied with direct current according to claim 1, in which the load object comprises an accumulator battery series-connected with a second semi-conductor rectifier poled to block the battery voltage.
Claim 6
Dependent Claim
39 words
Drive equipment supplied with direct current according to claim 4, in which said means comprise connection members connecting the battery to the motor through the controllable semi-conductor rectifier working in pulse operation for feeding the motor from the battery.
Claim 7
Dependent Claim
47 words
Drive equipment supplied with direct current according to claim 4, in which said means comprise connection members connecting the battery to the field winding through the controllable semi-conductor rectifier working in pulse operation for feeding the field winding from the battery in the case of electrical braking.
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) | 1980-04-18 | 1980-10-18 | 1981-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-18 | 1984-10-18 | 1985-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-18 | 1988-10-18 | 1989-04-19 | $7700.00 | Window Closed / Lapsed |