US3602796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistorized voltage regulator,particularly for automotive use
Assignee: Robert Bosch GmbH
•
Filing: 1969-05-01
•
Granted: 1971-08-31
•
Expires: 1989-05-01
Abstract
Abstract The output voltage of an automotive generator is rectified and applied to a bridge network, the cross connection from the bridge being connected to an amplifier with a differential input stage. The output of the amplifier controls current through the field winding of the alternator. Each of the branches of the bridge contains temperature-sensitive and voltage-sensitive nonlinear elements connected in opposition, so that upon deviation from the exact output voltage desired, the potential across the cross connection will change rapidly and exact voltage control can be obtained.
Inventors
- 👤 Johannes Hartmut Bleher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:04
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/16; H02J7/24; H02J7/243
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
227 words
Voltage regulator for automotive type generators with an excited field winding, having a switching type controllable semiconductor element (41) adapted for connection in series with a field winding (24) of the generator (11) to control the output voltage (UL) thereof, comprising a pair of voltage dividers (15, 16), at least one including nonlinear voltage sensitive means (53, 63), connected across the output of the generator (20, 29), said voltage dividers having tap points across which an error signal appears upon deviation of the output voltage from a predetermined value selected by reference to said voltage sensitive means; a differential amplifier (14; 44, 43, 46, 47) having a separate differential inputs, one each connected to a tap point (82, 86) of said voltage dividers, and a single output responsive to said error signal; means (17, 42) connecting the single output of said differential amplifier to said controllable semiconductor element to control the conduction thereof in accordance with said error signal appearing at the separate inputs of said differential amplifier and thus controlling current flow through the field of the geNerator; and a positive feedback circuit interconnecting the output of said differential amplifier and one of the inputs thereof whereby, upon deviation of output voltage from said predetermined value causing said error signal, the feedback circuit will cause rapid switching of the conductive state of said controllable semiconductor element.
Claim 2
Dependent Claim
227 words
Voltage regulator for automotive type generators with an excited field winding, having a switching type controllable semiconductor element (41) adapted for connection in series with a field winding (24) of the generator (11) to control the output voltage (UL) thereof, comprising a pair of voltage dividers (15, 16), at least one including nonlinear voltage sensitive means (53, 63), connected across the output of the generator (20, 29), said voltage dividers having tap points across which an error signal appears upon deviation of the output voltage from a predetermined value selected by reference to said voltage sensitive means; a differential amplifier (14; 44, 43, 46, 47) having a separate differential inputs, one each connected to a tap point (82, 86) of said voltage dividers, and a single output responsive to said error signal; means (17, 42) connecting the single output of said differential amplifier to said controllable semiconductor element to control the conduction thereof in accordance with said error signal appearing at the separate inputs of said differential amplifier and thus controlling current flow through the field of the geNerator; and a positive feedback circuit interconnecting the output of said differential amplifier and one of the inputs thereof whereby, upon deviation of output voltage from said predetermined value causing said error signal, the feedback circuit will cause rapid switching of the conductive state of said controllable semiconductor element.
Claim 3
Dependent Claim
62 words
Voltage regulator according to claim 1, wherein said differential amplifier includes a pair of transistors (43, 44) having similar electrodes connected together; and a constant current source (45) is provided supplying said similar electrodes of said transistors, and the control electrode of the constant current source being connected to a tap point (83) on a voltage divider including the voltage sensitive means.
Claim 4
Dependent Claim
35 words
Voltage regulator according to claim 2, wherein said voltage-sensitive means comprises a Zener diode, said Zener diode providing a reference voltage for one input to said differential amplifier and simultaneously for said constant current source.
Claim 5
Dependent Claim
25 words
Voltage regulator according to claim 1, wherein the differential amplifier is a two-stage amplifier and the output stage thereof includes a pair of complementary transistors.
Claim 6
Dependent Claim
35 words
Voltage regulator according to claim 1 wherein said differential amplifier includes a pair of transistors (43, 44) having their similar electrodes interconnected; and a constant current source (45) is provided supplying said interconnected similar electrodes.
Claim 7
Dependent Claim
20 words
Voltage regulator according to claim 1 including a feedback resistance (72) interconnecting the controlled semiconductor element and said voltage divider.
Claim 8
Dependent Claim
73 words
Voltage regulator according to claim 1, wherein the differential amplifier (43, 44, 46, 47) is a two-stage amplifier having a pair of input transistors (43, 44) and a pair of push-pull input, single ended output transistors (46, 47), having their push-pull inputs symmetrically separated coupled to the outputs of the input transistors (43, 44) to provide symmetrical loading of the input of the differential amplifier with respect to said pair of voltage dividers.
Claim 9
Dependent Claim
34 words
Voltage regulator according to claim 1, wherein said differential amplifier includes a pair of transistors (43, 44) having similar electrodes interconnected; and a constant current source (45) is provided supplying said interconnected similar electrodes.
Claim 10
Dependent Claim
58 words
Voltage regulator according to claim 1, wherein said voltage sensitive means comprises a voltage sensitive resistance in one of said voltage dividers; a constant current source is provided supplying said differential amplifier; and means connecting said voltage sensitive device to control the constant current source and to provide a sensing potential for one input of the differential amplifier.
Claim 11
Dependent Claim
161 words
Transistorized voltage regulator for automotive alternators having a field winding comprising a control switching transistor adapted for connection in series with the field winding; a differential amplifier having at least one pair of interconnected semiconductor switching elements and having a separate input and a single ended output controlling the conduction of said switching transistor. a bridge network having a pair of branches, the common connections being adapted for connection across the output voltage of said generator and each of the cross connection points of the bridge being connected to one each of the respective inputs of the differential amplifier; means included in each branch of the bridge network forming a voltage reference, said means being connected to opposite connections of said bridge whereby departure from desired output voltage will provide an error potential to the inputs of the differential amplifier at the cross connection; and a feedback circuit from the output of the differential amplifier to one of the inputs thereof.
Claim 12
Dependent Claim
161 words
Transistorized voltage regulator for automotive alternators having a field winding comprising a control switching transistor adapted for connection in series with the field winding; a differential amplifier having at least one pair of interconnected semiconductor switching elements and having a separate input and a single ended output controlling the conduction of said switching transistor. a bridge network having a pair of branches, the common connections being adapted for connection across the output voltage of said generator and each of the cross connection points of the bridge being connected to one each of the respective inputs of the differential amplifier; means included in each branch of the bridge network forming a voltage reference, said means being connected to opposite connections of said bridge whereby departure from desired output voltage will provide an error potential to the inputs of the differential amplifier at the cross connection; and a feedback circuit from the output of the differential amplifier to one of the inputs thereof.
Claim 13
Dependent Claim
40 words
Regulator according to claim 10, including an additional tap point on one of said branches of the bridge network; and a feedback imPedance connected from the output of the differential amplifier to the tap point to form said feedback circuit.
Claim 14
Dependent Claim
43 words
Regulator according to claim 10, including a constant current source having its output connected to the current supply for the differential amplifier and its input connected to the tap point of one of said branches and in circuit with said voltage reference means.
Claim 15
Dependent Claim
27 words
Regulator according to claim 10, wherein at least one branch of the bridge network includes a temperature-sensitive resistance connected between a common connection and a cross connection.
Claim 16
Dependent Claim
27 words
Regulator according to claim 10, wherein the differential amplifier, the bridge network, and accessory circuit components and network resistances are included in a single monolithic integrated circuit.
Claim 17
Dependent Claim
67 words
Regulator according to claim 10, wherein the differential amplifier includes a symmetrical two transistor push-pull circuit having a single ended output, and a pair of input transistors, each having said separate input and a separate output, each symmetrically connected to a respective one of the push-pull transistors; and interconnections from said single ended output of the push-pull connected transistors to the switching transistor for said field winding.
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) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |