US4581572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternating current generator for a car
Assignee: Mitsubishi Electric Corp
•
Filing: 1983-06-01
•
Granted: 1986-04-08
•
Expires: 2003-06-01
Abstract
Abstract Excitation of a field coil 2 is carried out by a separated power source 9 placed independent of a battery 8 to increase the output of a generator. A solar battery 10, a piezoelectric element 13 or a thermoelectric converting element 19 is used as the separately exciting means so that the output of the generator is increased for an exciting current effected by the separately exciting means.
Inventors
- 👤 Iwaki Yoshiyuki
- 👤 Matsumoto Akio
- 👤 Yokota Mitsuyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:10
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/34; H02J7/35; H02J7/14; H02J7/16; H02J7/24; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y02E10/56
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
100 words
An alternating current system for a car, comprising: a field coil; an armature coil having a three-phase connection to generate an alternating current output; a rectifying device for rectifying the alternating current output; a battery to be charged with the output of said rectifying device; a voltage controlling device for turning on and off the field current passing to said field coil; and a power source separate from said battery and separate from said rectifying device for supplying said field current; wherein said field current is supplied separately from said rectified output, so as to produce an increased rectified output.
Claim 2
Dependent Claim
100 words
An alternating current system for a car, comprising: a field coil; an armature coil having a three-phase connection to generate an alternating current output; a rectifying device for rectifying the alternating current output; a battery to be charged with the output of said rectifying device; a voltage controlling device for turning on and off the field current passing to said field coil; and a power source separate from said battery and separate from said rectifying device for supplying said field current; wherein said field current is supplied separately from said rectified output, so as to produce an increased rectified output.
Claim 3
Dependent Claim
18 words
An alternating current system according to claim 1, wherein said power source is constituted by a solar battery.
Claim 4
Dependent Claim
30 words
An alternating current system for a car according to claim 1, wherein said power source is constituted by a piezoelectric element converting the vibration of an engine into electrical energy.
Claim 5
Dependent Claim
49 words
An alternating current system for a car according to claim 1, wherein said power source is constituted by a piezoelectric element for converting the vibration of an engine into electrical energy and a surge absorbing element and a capacitor which are respectively connected in parallel to said piezoelectric element.
Claim 6
Dependent Claim
28 words
An alternating current system for a car according to claim 4, wherein said piezoelectric element is formed by Rochelle salt and said surge absorbing element is a varistor.
Claim 7
Dependent Claim
31 words
An alternating current system for a car according to claim 1, wherein said power source is formed by a power source performing heat-electricity conversion of waste heat discharged from an engine.
Claim 8
Dependent Claim
31 words
An alternating current system for a car according to claim 6, wherein said power source performing heat-electricity conversion of the waste heat discharged from the engine is a thermocouple of iron-Constantan.
Claim 9
Dependent Claim
32 words
An alternating current system for a car according to claim 6, wherein said power source performing heat-electricity conversion of the waste heat discharged from the engine is formed by a thermoelectric semiconductor.
Claim 10
Dependent Claim
159 words
An alternating current system for a car, comprising: a field coil; an armature coil having a three-phase connection to generate an alternating current output; a rectifying device for rectifying the alternating current output; a battery to be charged with the output of said rectifying device; a voltage controlling device for turning on and off the field current passing to said field coil; a power source separate from said battery for supplying said field current; and a switch connected between said power source and said battery for comparing the voltage from said power source to a threshold value and supplying said field current from said battery when said voltage is below the threshold value and supplying said field current from said power source when said voltage is above said threshold value; wherein said field current is supplied separately from said rectified output when the voltage from said power source is sufficiently large, so as to produce an increased rectified output.
Claim 11
Dependent Claim
159 words
An alternating current system for a car, comprising: a field coil; an armature coil having a three-phase connection to generate an alternating current output; a rectifying device for rectifying the alternating current output; a battery to be charged with the output of said rectifying device; a voltage controlling device for turning on and off the field current passing to said field coil; a power source separate from said battery for supplying said field current; and a switch connected between said power source and said battery for comparing the voltage from said power source to a threshold value and supplying said field current from said battery when said voltage is below the threshold value and supplying said field current from said power source when said voltage is above said threshold value; wherein said field current is supplied separately from said rectified output when the voltage from said power source is sufficiently large, so as to produce an increased rectified output.
References Cited (Backward Citations)
US1118269A
Cited
US3086161A
Cited
US3246232A
Cited
US3444946A
Cited
US3559027A
Cited
GB1329552A
Cited
US4301376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-07 | 1989-10-07 | 1990-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-07 | 1993-10-07 | 1994-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-07 | 1997-10-07 | 1998-04-08 | $7700.00 | Window Closed / Lapsed |