Claims
- 1. A DC backup power supply device comprising:
an AC/DC converter for converting an AC power to a DC power; a DC/DC converter for receiving the DC output power of the AC/DC converter and controlling a voltage of the received DC power; a bi-directional DC/DC converter connected to a DC path of a main circuit between said both converters via first switching means, said main circuit having a load connected to the DC/DC converter; and DC power storage means connected to the bi-directional DC/DC converter, said device further comprising:
means for detecting a current and/or voltage within the DC backup power supply device; and means for monitoring an abnormality in the DC backup power supply device on the basis of an output of the current/voltage detecting means.
- 2. A DC backup power supply device comprising:
an AC/DC converter for converting an AC power to a DC power; a bi-directional DC/DC converter connected to a main circuit via first switching means at a DC side of said AC/DC converter, said main circuit having a load to which a DC output power of the AC/DC converter is supplied; and DC power storage means connected to the bi-directional DC/DC converter, said device further comprising:
means for detecting a current and/or voltage within the DC backup power supply device; and means for monitoring an abnormality in the DC backup power supply device on the basis of an output of the current/voltage detecting means.
- 3. A DC backup power supply device comprising:
an AC/DC converter for converting an AC power to a DC power; a DC/DC converter for receiving the DC output power of the AC/DC converter and controlling a voltage of the received DC power; a bi-directional DC/DC converter connected to a DC path of a main circuit between said both converters via first switching means, said main circuit having a load connected to the DC/DC converter; and DC power storage means connected to the bi-directional DC/DC converter, said device further comprising:
means for detecting a current and/or voltage within the DC backup power supply device; and monitor means for diagnosing an abnormality in the DC backup power supply device on the basis of an output of said current/voltage detecting means under a condition that said fist switching means is turned OFF.
- 4. The DC backup power supply device as set forth in claim 1, wherein said monitor means includes said means for operating said bi-directional DC/DC converter under a condition that said first switching means is turned OFF and for detecting a current and/or voltage within said DC backup power supply devices.
- 5. The DC backup power supply device as set forth in claim 1, wherein said monitor means includes said means for operating said bi-directional DC/DC converter under a condition that said first switching means is turned ON and for detecting a current and/or voltage within said DC backup power supply devices.
- 6. The DC backup power supply device as set forth in claim 1, wherein a smoothing capacitor is provided to a side of said bi-directional DC/DC converter having the first switching means, and said monitor means includes means for operating said bi-directional DC/DC converter under a condition that said first switching means is turned OFF and for confirming charging operation from said DC power storage means to said smoothing capacitor.
- 7. The DC backup power supply device as set forth in claim 1, wherein a smoothing capacitor is provided to a side of said bi-directional DC/DC converter having the first switching means, and said monitor means includes means for operating said bi-directional DC/DC converter under a condition that said first switching means is turned ON and for confirming charging operation from said DC power storage means to said smoothing capacitor.
- 8. The DC backup power supply device as set forth in claim 1, wherein a smoothing capacitor is provided to a side of said bi-directional DC/DC converter having the first switching means, and said monitor means includes means for charging said smoothing capacitor from said DC power storage means through the operation of said bi-directional DC/DC converter, means for turning ON said first switching means after the charging operation, and means for confirming a change in a voltage across said smoothing capacitor before and after the first switching means is turned ON.
- 9. The DC backup power supply device as set forth in claim 1, further comprising:
second switching means connected between said bi-directional DC/DC converter and said DC power storage means; means for detecting an abnormality in said bi-directional DC/DC converter; and means for turning OFF said second switching means on the basis of operation of said abnormality detecting means.
- 10. The DC backup power supply device as set forth in claim 1, further comprising:
second switching means connected between said bi-directional DC/DC converter and said DC power storage means; and means for detecting an abnormality in said second switching means when detecting a current flowing through said DC power storage means under a condition that the second switching means is turned OFF.
- 11. The DC backup power supply device as set forth in claim 1, further comprising:
means for detecting a voltage of said DC power storage means; means for turning ON said first switching means to operate said bi-directional DC/DC converter and to charge a power in said DC power storage means; and means for judging a state of said DC power storage means on the basis of voltage values and charging current values of said DC power storage means before and after the DC power storage means is charged.
- 12. A DC backup power supply device comprising:
an AC/DC converter for converting an AC power to a DC power; a bi-directional DC/DC converter connected to a main circuit via first switching means at a DC side of said AC/DC converter, said main circuit having a load to which a DC output power of the AC/DC converter is supplied; and DC power storage means connected to the bi-directional DC/DC converter, said device further comprising:
means for detecting a current and/or voltage within the DC backup power supply device; means for monitoring an abnormality in the DC backup power supply device on the basis of an output of the current/voltage detecting means; and means for displaying a fact that said monitor means detected the abnormality.
- 13. The DC backup power supply device as set forth in claim 1, further comprising:
means for performing first abnormality diagnosis over a section including said DC power storage means and said bi-directional DC/DC converter within said DC backup power supply device under a condition that said first switching means is turned OFF; and means for performing second abnormality diagnosis over a section including said DC power storage means and said bi-directional DC/DC converter within said DC backup power supply device under a condition that said first switching means is turned ON
- 14. A method for diagnosing a DC backup power supply device comprising:
an AC/DC converter for converting an AC power to a DC power; a DC/DC converter for receiving the DC output power of the AC/DC converter and controlling a voltage of the received DC power; a bi-directional DC/DC converter connected to a DC path of a main circuit between said both converters via first switching means, said main circuit having a load connected to the DC/DC converter; and DC power storage means connected to the bi-directional DC/DC converter, said method including steps of:
performing first abnormality diagnosis over said DC backup power supply device under a condition that said first switching means is turned OFF; when an abnormality is not detected in said first abnormality diagnosis step, turning ON said first switching means to perform second abnormality diagnosis over said DC backup power supply device.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2002-113117 |
Apr 2002 |
JP |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The present application is relevant to U.S. patent application Ser. No. ______ being filed by Akihiko Kanouda, Minehiro Nemoto, Fumikazu Takahashi, Masahiro Hamaogi, Yoshihide Takahashi, Takashi Tanabe, Takao Gotou, Masato Isogai, Toshikatsu Miyata, and assigned to the present assignees, based on Japanese Patent Application No. 2002-113116 filed on Apr. 16, 2002. The contents of the application are incorporated herein by reference.