Patent US5309073A successfully refreshed from Google Patents.
US5309073A
Expired / Lapsed
US
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Electric vehicle control device
Assignee: Hitachi Ltd
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Filing: 1992-10-20
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Granted: 1994-05-03
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Expires: 2012-10-20
Abstract
Abstract An electric vehicle control device is disclosed, which includes an AC motor for driving a vehicle; a main electric power conversion unit for supplying an AC voltage to the AC motor; a battery for supplying a DC voltage to the main electric power conversion unit; an auxiliary electric power conversion unit connected to the battery and adapted to be connected to a load or a power supply; a controller for controlling the main and auxiliary electric power conversion units so as to act selectively as an inverter or a converter; and a switching unit for giving selectively the AC motor the AC voltage from the main and auxiliary electric power conversion units under control of the controller. In the running mode of the electric vehicle, the controller described above makes the main electric power conversion unit act as an inverter and controls the switching unit so that the AC voltage from the main electric power conversion unit is given to the AC motor. Further, responding to detection of a failure of the main electric power conversion unit, the controller makes the auxiliary electric power conversion unit act as an inverter and controls the switching unit so that the AC voltage from the auxiliary electric power conversion unit is given to the AC motor.
Inventors
- 👤 Satoru Kaneko
- 👤 Ryoso Masaki
- 👤 Sanshiro Obara
- 👤 Tsutomu Ohmae
- 👤 Yuusuke Takamoto
- 👤 Hirohisa Yamamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:01
CPC Classifications
B; B60; B60L; B60L3/00; B60L3/0023; B60L3/003; B60L50/00; B60L50/50; B60L50/51; B60L53/00; B60L53/10; B60L53/14; B60L53/20; B60L53/24; B60L2200/00; B60L2200/26; B60L2210/00; B60L2210/20; B60L2220/00; B60L2220/50; B60L2220/54; B60L2250/00; B60L2250/30; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y02T10/70; Y02T10/7072; Y02T10/72; Y02T90/00; Y02T90/10; Y02T90/12; Y02T90/14
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
116 words
An electric vehicle control device comprising: an AC motor for driving a vehicle; a main electric power conversion unit for supplying an AC voltage to said AC motor; a battery for supplying a DC voltage to said main electric power conversion unit; an auxiliary electric power conversion unit connected to said battery and adapted to be connected to a load or a power supply; a controller for controlling the main and auxiliary electric power conversion units so as to act selectively as an inverter or a converter; and switching means for applying the AC voltage to said AC motor selectively from one of said main and auxiliary electric power conversion units under control of said controller.
Claim 2
Dependent Claim
116 words
An electric vehicle control device comprising: an AC motor for driving a vehicle; a main electric power conversion unit for supplying an AC voltage to said AC motor; a battery for supplying a DC voltage to said main electric power conversion unit; an auxiliary electric power conversion unit connected to said battery and adapted to be connected to a load or a power supply; a controller for controlling the main and auxiliary electric power conversion units so as to act selectively as an inverter or a converter; and switching means for applying the AC voltage to said AC motor selectively from one of said main and auxiliary electric power conversion units under control of said controller.
Claim 3
Dependent Claim
53 words
An electric vehicle control device according to claim 1, wherein in running mode of the electric vehicle, said controller makes said main electric power conversion unit act as an inverter and controls said switching means so that the AC voltage from said main electric power conversion unit is given to said AC motor.
Claim 4
Dependent Claim
75 words
An electric vehicle control device according to claim 2, further comprising: means for detecting failure in said main electric power conversion unit; wherein responding to detection of a failure by said means for detecting failure, said controller makes said auxiliary electric power conversion unit act as an inverter and controls said switching means so that the AC voltage from said auxiliary electric power conversion unit is given to said AC motor through said switching means.
Claim 5
Dependent Claim
127 words
An electric vehicle control device according to claim 2, further comprising: means for detecting troubles in said main electric power conversion unit; means for informing a driver of the vehicle of a trouble in said main electric power conversion unit, responding to detection of the trouble by said means for detecting troubles; and means for instructing said controller to give said AC motor the AC voltage from said auxiliary electric power conversion unit in lieu of said main electric power conversion unit; wherein responding to an instruction from said instructing means, said controller makes said auxiliary electric power conversion unit act as an inverter and controls said switching means so that the AC voltage from said auxiliary electric power conversion unit is given to said AC motor.
Claim 6
Dependent Claim
28 words
An electric vehicle control device according to claim 2, wherein said controller determines that the vehicle is in a running mode, when a key switch is turned on.
Claim 7
Dependent Claim
75 words
An electric vehicle control device according to claim 1, wherein said auxiliary electric power conversion unit is connected to a power supply; and in a charging mode of the electric vehicle, said controller makes said auxiliary electric power conversion unit act as a converter so as to charge said battery by a DC current from said auxiliary electric power conversions unit, responding to connection of said auxiliary electric power conversion unit to said power supply.
Claim 8
Dependent Claim
111 words
An electric vehicle control device according to claim 6, further comprising: means for detecting troubles in said auxiliary electric power conversions unit; and means for switching said auxiliary electric power conversion unit to said main electric power conversion unit to connect said main electric power conversion unit to said power supply; wherein responding to detection of a trouble by said means for detecting troubles, said controller makes said auxiliary electric power conversion unit act as a converter and controls said switching means so that is switches said auxiliary electric power conversions unit to said main electric power conversion unit to connect said main electric power conversion unit to said power supply.
Claim 9
Dependent Claim
169 words
An electric vehicle control device according to claim 6, further comprising: means for detecting troubles in said auxiliary electric power conversion unit; means for informing a driver of the vehicle of a trouble in said auxiliary electric power conversion unit, responding to detection of the trouble by said means for detecting troubles; means for switching said auxiliary electric power conversion unit to said main electric power conversion unit to connect said main electric power conversion unit to said power supply; and means for instructing said controller to switch said auxiliary electric power conversion unit to said main electric power conversion unit to connect said main electric power conversion unit to said power supply; wherein responding to an instruction from said instructing means, said controller makes said main electric power conversion unit act as a converter and controls said switching means so that it switches said auxiliary electric power conversion unit to said main electric power conversion unit to connect said main electric power conversion unit to said power supply.
Claim 10
Dependent Claim
28 words
An electric vehicle control device according to claim 6, wherein said controller determines that the vehicle is in a charging mode, when a key switch is turned off.
Claim 11
Dependent Claim
38 words
An electric vehicle control device according to claim 6, wherein said controller determines that the vehicle is in a charging mode, when a key switch is turned off and instructs a charging instructing means to charge the battery.
Claim 12
Dependent Claim
91 words
An electric vehicle control device according to claim 1, wherein said auxiliary electric power conversion unit is connected to a load; and in a running mode of the electric vehicle, said controller makes said main electric power conversion unit act as an inverter and controls said switching means so as to give said AC motor an AC voltage from said main electric power conversion unit; and in a load driving mode, said controller makes said auxiliary electric power conversion unit act as an inverter to give said load an output voltage.
Claim 13
Dependent Claim
70 words
An electric vehicle control device according to claim 11, further comprising: means for detecting troubles in said main electric power conversion unit; wherein responding to detection of a trouble by said means for detecting troubles, said controller makes said auxiliary electric power conversion unit act as an inverter and controls said switching means so as to give said AC motor an AC voltage from said auxiliary electric power conversion unit.
Claim 14
Dependent Claim
126 words
An electric vehicle control device according to claim 11, further comprising: means for detecting troubles in said main electric power conversion unit; means for informing a driver of the vehicle of a trouble in said main electric power conversion unit, responding to detection of the trouble by said means for detecting troubles; and means for instructing said controller to give said AC motor the AC voltage from said auxiliary electric power conversion unit in lieu of said main electric power conversion unit; wherein responding to an instruction from said instructing means, said controller makes said auxiliary electric power conversion unit act as an inverter and controls said switching means so as to give said AC motor the AC voltage from said auxiliary electric power conversion unit.
Claim 15
Dependent Claim
28 words
An electric vehicle control device according to claim 11, wherein said controller determines that the vehicle is in a running mode, when a key switch is turned on.
Claim 16
Dependent Claim
42 words
An electric vehicle control device according to claim 11, wherein said controller determines that the vehicle is in a load driving mode, when a key switch is turned off and further load drive is instructed by means for instructing the load drive.
Claim 17
Dependent Claim
96 words
An electric vehicle control device comprising: an AC motor for driving a vehicle; a main electric power conversion unit for supplying an AC voltage to said AC motor; a battery for supplying a DC voltage to said main electric power conversion unit; an auxiliary electric power conversion unit connected to said battery and at the same time to a load to supply a voltage to the load; switching means for applying the voltage to said motor selectively from one of said main and auxiliary electric power conversion units; and a controller for controlling said switching means.
Claim 18
Dependent Claim
96 words
An electric vehicle control device comprising: an AC motor for driving a vehicle; a main electric power conversion unit for supplying an AC voltage to said AC motor; a battery for supplying a DC voltage to said main electric power conversion unit; an auxiliary electric power conversion unit connected to said battery and at the same time to a load to supply a voltage to the load; switching means for applying the voltage to said motor selectively from one of said main and auxiliary electric power conversion units; and a controller for controlling said switching means.
Claim 19
Dependent Claim
62 words
An electric vehicle control device according to claim 16, wherein in a running mode of the electric vehicle, said controller controls said switching means so as to give said AC motor an AC voltage from said main electric power conversion unit, and further in a load driving mode, to give said load an output voltage from said auxiliary electric power conversion unit.
Claim 20
Dependent Claim
58 words
An electric vehicle control device according to claim 17, further comprising: means for detecting troubles in said main electric power conversion unit; wherein said controller controls said switching means so as to give said AC motor an AC voltage from said auxiliary electric power conversion unit, responding to detection of a trouble by said means for detecting troubles.
Claim 21
Dependent Claim
114 words
An electric vehicle control device according to claim 17, further comprising: means for detecting troubles in said main electric power conversion unit; means for informing a driver of the vehicle of a trouble in said main electric power conversion unit, responding to detection of the trouble by said means for detecting troubles; and means for instructing said controller to give said AC motor the AC voltage from said auxiliary electric power conversion unit in lieu of said main electric power conversion unit; wherein said controller controls said switching means so as to give said AC motor the AC voltage from said auxiliary electric power conversion unit, responding to an instruction from said instructing means.
Claim 22
Dependent Claim
28 words
An electric vehicle control device according to claim 17, wherein said controller determines that the vehicle is in a running mode, when a key switch is turned on.
Claim 23
Dependent Claim
42 words
An electric vehicle control device according to claim 17, wherein said controller determines that the vehicle is in a load driving mode, when a key switch is turned off and further load drive is instructed by means for instructing the load drive.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-02 | 1997-11-01 | 1998-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-02 | 2001-11-01 | 2002-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-02 | 2005-11-01 | 2006-05-03 | $7700.00 | Window Closed / Lapsed |