US3568037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical supply systems incorporating a permanent magnet alternator with voltage regulation
Assignee: ZF International UK Ltd
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Filing: 1969-03-27
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Granted: 1971-03-02
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Expires: 1989-03-27
Abstract
Abstract In a battery-charging system a permanent magnet alternator has a winding connected at one end to one supply line and at its other end connected to the other supply line through a diode. In order to control the output from this winding, a gate controlled semiconductor switch, which can by way of example be a thyristor or a new device called a triac, is connected across the winding, and is provided with base current only when the voltage between the lines reaches a predetermined value.
Inventors
- 👤 Malcolm Williams
- 👤 Duncan Barry Hodgson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:07
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/1469; H02J7/1492; Y; Y02; Y02T; Y02T10/00; Y02T10/80; Y02T10/92
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
An electrical supply system comprising in combination a pair of supply lines the voltage between which is to be maintained substantially constant, a permanent magnet alternator having a winding with one end connected directly to one of the supply lines and its other end connected to the other supply line through a diode, a gate-controlled semiconductor switch connected across said winding, and voltage-sensing means connected across the supply lines and serving to supply gate current to said switch when the voltage between the supply lines exceeds a predetermined value.
Claim 2
Dependent Claim
89 words
An electrical supply system comprising in combination a pair of supply lines the voltage between which is to be maintained substantially constant, a permanent magnet alternator having a winding with one end connected directly to one of the supply lines and its other end connected to the other supply line through a diode, a gate-controlled semiconductor switch connected across said winding, and voltage-sensing means connected across the supply lines and serving to supply gate current to said switch when the voltage between the supply lines exceeds a predetermined value.
Claim 3
Dependent Claim
91 words
A system as claimed in claim 1 in which the permanent magnet alternator includes a second winding also having one end connected to said one of the supply lines and its other end connected to the other supply line through another diode, the first and second winding providing to the supply lines half-wave rectified outputs which are 180* out of phase, the system including a second gate controlled semiconductor switch connected across the second winding, the second switch being supplied with gate current at the same time as the first switch.
Claim 4
Dependent Claim
14 words
A system as claimed in claim 1 iN which the switch is a thyristor.
Claim 5
Dependent Claim
14 words
A system as claimed in claim 1 in which the switch is a triac.
Claim 6
Dependent Claim
84 words
A system as claimed in claim 1 in which the switch is a triac and the permanent magnet alternator includes a second winding and also having one end connected to one of the supply lines and its other end connected to the other supply line through a diode, the first and second windings providing to the supply lines half-wave rectified outputs which are 180* out of phase, the degree of coupling between the windings being sufficient to allow a single triac to be used.
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |