Patent US3361977A successfully refreshed from Google Patents.
US5412293A
Expired / Lapsed
US
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Power supply for motor usable with an electric vehicle
Assignee: Equos Research Co Ltd
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Filing: 1994-05-02
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Granted: 1995-05-02
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Expires: 2014-05-02
Abstract
Abstract A large-capacity capacitor (C1, C2) is connected in series and/or parallel with a battery (11). A voltage sensor (9, 10) is provided to the battery and/or the large-capacity capacitor to detect their terminal voltages. Input and output currents are limited between at least one of a motor driving circuit and the large-capacity capacitor and the battery on the basis of the detection signals from the voltage sensor. When the terminal voltage of the large-capacity capacitor is equal to or higher than a predetermined value, a current flowing from the motor driving circuit to the large-capacity capacitor is limited.
Inventors
- 👤 Yukihiro Minezawa
- 👤 Hitoshi Dohkoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:43
CPC Classifications
B; B60; B60L; B60L7/00; B60L7/10; B60L7/14; B60L15/00; B60L15/007; B60L50/00; B60L50/40; B60L50/50; B60L50/51; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y02T10/70
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
164 words
An electric vehicle for generating at least part of a driving force by a motor, comprising: a driving circuit for driving said motor; a power source unit for supplying electrical power to said motor, said power source unit being regeneratively charged by said motor; a large-capacity capacitor that stores an electrical charge and supplies electrical power to said motor, said large-capacity capacitor being regeneratively charged by said motor; a first sensor for detecting a voltage of said power source unit; a second sensor for detecting a voltage of said large-capacity capacitor; and means for distributing a regenerative power of said motor to said large-capacity capacitor and said power source unit, an amount of regenerative power distributed to said large-capacity capacitor and an amount of regenerative power distributed to said power source unit being determined in response to voltage detected by said first sensor and said voltage detected by said second sensor, so as to regeneratively charge said power source unit and said large-capacity capacitor.
Claim 2
Dependent Claim
164 words
An electric vehicle for generating at least part of a driving force by a motor, comprising: a driving circuit for driving said motor; a power source unit for supplying electrical power to said motor, said power source unit being regeneratively charged by said motor; a large-capacity capacitor that stores an electrical charge and supplies electrical power to said motor, said large-capacity capacitor being regeneratively charged by said motor; a first sensor for detecting a voltage of said power source unit; a second sensor for detecting a voltage of said large-capacity capacitor; and means for distributing a regenerative power of said motor to said large-capacity capacitor and said power source unit, an amount of regenerative power distributed to said large-capacity capacitor and an amount of regenerative power distributed to said power source unit being determined in response to voltage detected by said first sensor and said voltage detected by said second sensor, so as to regeneratively charge said power source unit and said large-capacity capacitor.
Claim 3
Dependent Claim
13 words
The electric vehicle of claim 1, wherein said distributing means comprises switching means.
Claim 4
Dependent Claim
17 words
The electric vehicle of claim 2, wherein said switching means is operatable at a predetermined duty ratio.
Claim 5
Dependent Claim
13 words
The electric vehicle of claim 1, wherein said distributing means comprises a transistor.
Claim 6
Dependent Claim
188 words
An electric vehicle for generating at least part of a driving force by a motor, comprising: a driving circuit for driving said motor; a power source unit for supplying electrical power to said motor, said power source unit being regeneratively charged by said motor; a large-capacity capacitor that supplies electrical power to said motor, said large-capacity capacitor being regeneratively charged by said motor; a first sensor for detecting a first voltage of said large-capacity capacitor; a second sensor for detecting a second voltage of said power source unit; means for limiting a regenerative power from said driving circuit in response to said detected first voltage and said detected second voltage when said detected first voltage is greater than a first predetermined value and said detected second voltage is greater than a second predetermined value; and means for distributing an electrical power from said driving circuit to said large-capacity capacitor and said driving circuit, an amount of electrical power distributed to said large-capacity capacitor and an amount of electrical power distributed to said driving circuit being determined in response to said detected first voltage and said detected second voltage.
Claim 7
Dependent Claim
188 words
An electric vehicle for generating at least part of a driving force by a motor, comprising: a driving circuit for driving said motor; a power source unit for supplying electrical power to said motor, said power source unit being regeneratively charged by said motor; a large-capacity capacitor that supplies electrical power to said motor, said large-capacity capacitor being regeneratively charged by said motor; a first sensor for detecting a first voltage of said large-capacity capacitor; a second sensor for detecting a second voltage of said power source unit; means for limiting a regenerative power from said driving circuit in response to said detected first voltage and said detected second voltage when said detected first voltage is greater than a first predetermined value and said detected second voltage is greater than a second predetermined value; and means for distributing an electrical power from said driving circuit to said large-capacity capacitor and said driving circuit, an amount of electrical power distributed to said large-capacity capacitor and an amount of electrical power distributed to said driving circuit being determined in response to said detected first voltage and said detected second voltage.
Claim 8
Dependent Claim
13 words
The electric vehicle of claim 5, wherein said distributing means comprises switching means.
Claim 9
Dependent Claim
160 words
An electric vehicle for generating at least part of a driving force by a motor, comprising: a driving circuit for said motor; a source of electrical power; a first large-capacity capacitor connected in series with said source of electrical power; a first sensor for detecting a terminal voltage of said first large-capacity capacitor; a second large-capacity capacitor connected in parallel with said source of electrical power; a second sensor for detecting a terminal voltage of said second large-capacity capacitor; first current-limiting means for limiting a current flowing from said driving circuit to said first large-capacity capacitor when said terminal voltage detected by said first sensor is not less than a predetermined value; and second current-limiting means for limiting a current flowing from at least one of said driving circuit, said first large-capacity capacitor, and said source of electrical power into said second large-capacity capacitor when said terminal voltage detected by said second sensor is not less than a predetermined value.
Claim 10
Dependent Claim
160 words
An electric vehicle for generating at least part of a driving force by a motor, comprising: a driving circuit for said motor; a source of electrical power; a first large-capacity capacitor connected in series with said source of electrical power; a first sensor for detecting a terminal voltage of said first large-capacity capacitor; a second large-capacity capacitor connected in parallel with said source of electrical power; a second sensor for detecting a terminal voltage of said second large-capacity capacitor; first current-limiting means for limiting a current flowing from said driving circuit to said first large-capacity capacitor when said terminal voltage detected by said first sensor is not less than a predetermined value; and second current-limiting means for limiting a current flowing from at least one of said driving circuit, said first large-capacity capacitor, and said source of electrical power into said second large-capacity capacitor when said terminal voltage detected by said second sensor is not less than a predetermined value.
Claim 11
Dependent Claim
15 words
The electric vehicle of claim 1, wherein said large-capacity capacitor comprises an electric double-layer capacitor.
Claim 12
Dependent Claim
23 words
The electric vehicle of claim 1, wherein said large-capacity capacitor comprises a plurality of electric double-layer capacitors coupled in series with each other.
Claim 13
Dependent Claim
16 words
The electric vehicle of claim 1, wherein said large-capacity capacitor comprises a quasi capacitance type capacitor.
Claim 14
Dependent Claim
15 words
The electric vehicle of claim 7, wherein said large-capacity capacitor comprises an electric double-layer capacitor.
Claim 15
Dependent Claim
23 words
The electric vehicle of claim 7, wherein said large-capacity capacitor comprises a plurality of electric double-layer capacitors coupled in series with each other.
Claim 16
Dependent Claim
16 words
The electric vehicle of claim 7, wherein said large-capacity capacitor comprises a quasi capacitance type capacitor.
Claim 17
Dependent Claim
15 words
The electric vehicle of claim 1, wherein said power source unit comprises a rechargeable battery.
Claim 18
Dependent Claim
15 words
The electric vehicle of claim 5, wherein said power source unit comprises a rechargeable battery.
Claim 19
Independent Claim
157 words
An apparatus for generating at least part of a driving force by a motor, comprising: means for driving said motor; means for supplying electrical power to said motor, said supplying means being regeneratively charged by said motor; means for smoothing said electrical power supplied by said supplying means, said smoothing means being connected between said supplying means and said driving means; means for storing an electrical charge, said storing means supplying electrical power to said motor, said storing means being regeneratively charged by said motor; means for detecting a voltage of said storing means; and means for distributing a regenerative power of said motor to said storing means and said supplying means, an amount of regenerative power distributed to said storing means and an amount of regenerative power distributed to said supplying means being determined in response to said voltage detected by said detecting means, so as to regeneratively charge said supplying means and said storing means.
Claim 20
Independent Claim
157 words
An apparatus for generating at least part of a driving force by a motor, comprising: means for driving said motor; means for supplying electrical power to said motor, said supplying means being regeneratively charged by said motor; means for smoothing said electrical power supplied by said supplying means, said smoothing means being connected between said supplying means and said driving means; means for storing an electrical charge, said storing means supplying electrical power to said motor, said storing means being regeneratively charged by said motor; means for detecting a voltage of said storing means; and means for distributing a regenerative power of said motor to said storing means and said supplying means, an amount of regenerative power distributed to said storing means and an amount of regenerative power distributed to said supplying means being determined in response to said voltage detected by said detecting means, so as to regeneratively charge said supplying means and said storing means.
Claim 21
Dependent Claim
13 words
The apparatus of claim 16, wherein said supplying means comprises a rechargeable battery.
Claim 22
Dependent Claim
16 words
The electric vehicle of claim 5, wherein said limiting means is arranged in said driving circuit.
Claim 23
Dependent Claim
13 words
The apparatus of claim 16, wherein said storing means comprises a large-capacity capacitor.
Claim 24
Dependent Claim
63 words
The apparatus of claim 16, wherein said storing means comprises: a first capacitor connectable in series with said source of electrical power; and a second capacitor connectable in parallel with said source of electrical power; and, said detecting means comprises: a first sensor for detecting a voltage of said first capacitor; and a second sensor for detecting a voltage of said second capacitor.
Claim 25
Dependent Claim
34 words
The electric vehicle of claim 1, further comprising means for smoothing said electrical power supplied by said power source unit, said smoothing means being connected between said power source unit and said driving circuit.
Claim 26
Dependent Claim
34 words
The electric vehicle of claim 5, further comprising means for smoothing said electrical power supplied by said power source unit, said smoothing means being connected between said power source unit and said driving circuit.
References Cited (Backward Citations)
US3560818A
Cited
US3714533A
Cited
JPS4937317A
Cited
US4056764A
Cited
US4100427A
Cited
US4287936A
Cited
US4384240A
Cited
US4330742A
Cited
US4465955A
Cited
US4787021A
Cited
US5200644A
Cited
US5091679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-05-01 | 1998-10-31 | 1999-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-01 | 2002-10-31 | 2003-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-01 | 2006-10-31 | 2007-05-02 | $7700.00 | Window Closed / Lapsed |