Patent US4129819A successfully refreshed from Google Patents.
US4129819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulator circuit for motor vehicle generator with feedback to oppose regulator transients
Assignee: Robert Bosch GmbH
•
Filing: 1977-09-29
•
Granted: 1978-12-12
•
Expires: 1997-09-29
Abstract
Abstract A STIFF POSITIVE FEEDBACK TO THE VOLTAGE REGULATOR TAP AT WHICH THE Zener diode in circuit with the control transistor of the regulator is called into play accelerates the switching operation at the operating thresholds of the regulator, while a negative feedback from the same regulator terminal, with inversion produced by a transistor, is applied to a second tap of the voltage divider farther from ground, where its effect is delayed by a capacitor that also serves to filter the command voltage applied to the regulator. The transistor that inverts the feedback acts as a controlled current source drawing current from the second voltage tap. The circuit is highly compatible with production by integrated circuit technology.
Inventors
- 👤 Armin Arendt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:21
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/16; H02J7/24; H02J7/243
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
93 words
A voltage regulator for a generator having an exciter field winding (2) connected in series with a semiconductor switch (14) controllable through a Zener diode (20) by the voltage at a first tap (18) of a voltage divider (15, 16, 17) connected across the voltage to be regulated, in which regulator there is also provided: an inverse feedback path (28, 29, 30, 31) having a delayed operation characteristic and connected between the connection of the semiconductor switch (14) to said exciter field winding (2) and a second tap (19) of said voltage divider.
Claim 2
Dependent Claim
93 words
A voltage regulator for a generator having an exciter field winding (2) connected in series with a semiconductor switch (14) controllable through a Zener diode (20) by the voltage at a first tap (18) of a voltage divider (15, 16, 17) connected across the voltage to be regulated, in which regulator there is also provided: an inverse feedback path (28, 29, 30, 31) having a delayed operation characteristic and connected between the connection of the semiconductor switch (14) to said exciter field winding (2) and a second tap (19) of said voltage divider.
Claim 3
Dependent Claim
62 words
A voltage regulator as defined in claim 1 in which said semiconductor switch (14) is a switching transistor, and in which a control transistor (23) is provided for controlling said switching transistor (14), the base electrode of said control transistor (23) being connected in circuit with said Zener diode (20) and said first tap (18) of said voltage divider (15, 16, 17).
Claim 4
Dependent Claim
58 words
A voltage regulator as defined in claim 2 in which said base electrode of said control transistor (23) is connected through at least one temperature compensating diode (21, 22) to said Zener diode (20), each said temperature compensating diode being so poled so as to be conducting when said Zener diode (20) is conducting in its breakdown mode.
Claim 5
Dependent Claim
24 words
A voltage regulator is defined as claim 2 in which said inverse feedback path is constituted as a controlled current source (29, 30, 31).
Claim 6
Dependent Claim
24 words
A voltage regulator as defined in claim 4 in which said inverse feedback path has a smoothing capacitor (28) as a delay producing component.
Claim 7
Dependent Claim
43 words
A voltage regulator as defined in claim 2 in which a positive feedback path (32) is connected between the connection of said switching transistor (14) to said exciter field winding (2) and said first tap (18) of said voltage divider (15, 16, 17).
Claim 8
Dependent Claim
20 words
A voltage regulator as defined in claim 6 in which said positive feedback path consists essentially of a resistance (32).
Claim 9
Dependent Claim
51 words
A voltage regulator as defined in claim 1 for an alternating current generator having a set of diodes (8) for providing a rectified dc supply voltage to said exciter field winding (2) and in which said voltage to be regulated is said rectified dc voltage as supplied by said diodes (8).
Claim 10
Dependent Claim
30 words
A voltage regulator as defined in claim 1 in which said voltage to be regulated is the voltage of a storage battery connected to said generator to be charged thereby.
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) | 1981-12-11 | 1982-06-12 | 1982-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-11 | 1986-06-12 | 1986-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-11 | 1990-06-12 | 1990-12-12 | $7700.00 | Window Closed / Lapsed |