Electric power conversion apparatus
View Patent ↗An electric power conversion apparatus comprises: three conversion units; a backup conversion unit that can be substituted for any one of the conversion units; and a backup terminal conductor unit. The conversion units, which are mounted on a converter board disposed in a case, can convert a DC current to a three-phase AC current having U-, V- and W-phases. If any one of the conversion units goes out of order, the backup terminal conductor unit can then electrically connect the auxiliary conversion unit, in substitution for the conversion unit having gone out of order, to a three-phase AC input/output unit.
1. An electric power conversion apparatus
comprising:
a casing;
a converter substrate that is arranged in the casing;
a first phase conversion unit that is attached to the converter substrate and is configured to be capable of converting a direct current into a first phase current component of a three-phase alternating current;
a second phase conversion that is attached to the converter substrate and is configured to be capable of converting the direct current into a second phase current component of the three-phase alternating current;
a third phase conversion unit that is attached to the converter substrate and is configured to be capable of converting the direct current into the third phase current component of the three-phase alternating current;
a backup phase conversion unit that is configured to be capable of replacing each of the first phase conversion unit, the second phase conversion unit, and the third phase conversion unit;
a three-phase alternating current unit that is electrically connected to each of the first phase conversion unit, the second phase conversion unit, and the third phase conversion unit, and is capable of outputting a three-phase alternating current;
a direct current unit that is electrically connected to each of the first phase conversion unit, the second phase conversion unit, and the third phase conversion unit, and is capable of inputting a direct current; and
a backup terminal conductor unit that is that is arranged at a distance from each of the first phase conversion unit, the second phase conversion unit, and the third phase conversion unit, is electrically connected to the backup phase conversion unit, and is configured to be capable of electrically connecting the backup phase conversion unit to the three-phase alternating current unit instead of any one of the first phase conversion unit, the second phase conversion unit, and the third phase conversion unit when the one fails, wherein:
a backup cable having an electrical conductivity is mechanically and electrically connected at one end to the backup phase conversion unit, and is mechanically and electrically connected at another end to the backup terminal conductor unit;
a first phase cable, a second phase cable, and a third phase cable having an electrical conductivity are electrically and mechanically connected to the three-phase alternating current unit at their respective three-phase alternating current unit-side ends;
converter-side ends of the first phase cable, the second phase cable, and the third phase cable are electrically and mechanically connected to the first phase conversion unit, the second phase conversion unit, and the third phase conversion unit in a detachable manner, respectively; and
when any one of the first phase conversion unit, the second phase conversion unit, and the third phase conversion unit fails, the converter-side end of one of the first phase cable, the second phase cable, and the third phase cable corresponding to the failed conversion unit is detached from the failed conversion unit and electrically and mechanically connected to the backup terminal conductor unit.
2. The electric power conversion apparatus according to claim 1 , wherein:
the backup terminal conductor unit includes a plurality of terminal parts; and
when any one of the first phase conversion unit, the second phase conversion unit, and the third phase conversion unit fails, one of the first phase cable, the second phase cable, and the third phase cable corresponding to the failed conversion unit is connected to the terminal parts without extension.
3. The electric power conversion apparatus according to claim 1 , wherein the backup terminal conductor unit is made of copper or a copper alloy.
4. An electric power conversion apparatus comprising:
a casing
a converter substrate that is arranged in the casing;
a first phase conversion unit that is attached to the converter substrate and is configured to be capable of converting first phase current component of a three-phase alternating current into a direct current;
a second phase conversion unit that is attached to the converter substrate and is configured to be capable of converting a second phase current component of the three-phase alternating current into a direct current;
a third phase conversion unit that is attached to the converter substrate and is configured to be capable of converting a third phase current component of the three-phase alternating current into a direct current;
a backup phase conversion unit that is configured to be capable of replacing each of the first phase conversion unit, the second phase conversion unit, and the third phase conversion unit;
a three-phase alternating current unit that is electrically connected to each of the first phase conversion unit the second phase conversion unit, the third phase conversion unit, and is capable of inputting a three-phase alternating current;
a direct current unit that is electrically connected to each of the first phase conversion unit, the second phase conversion unit, and the third phase conversion unit, and is capable of outputting a direct current; and
a backup terminal conductor unit that is arranged at a distance from each of the first phase conversion unit, the second phase conversion unit and the third phase conversion unit, is electrically connecting the backup phase conversion unit, and is configured to be capable of electrically connecting the backup phase conversion unit to the three-phase alternating current unit instead of any one of the first phase conversion unit, the second phase conversion unit and the third phase conversion unit when the one fails, wherein:
a backup cable having an electrical conductivity is mechanically and electrically connected at one end to the backup phase conversion unit, and is mechanically and electrically connected at another end to the backup terminal conductor unit;
a first phase cable, a second phase cable, and a third phase cable having an electrical conductivity are electrically and mechanically connected to the three-phase alternating current unit at their respective three-phase alternating current unit-side ends;
converter-side ends of the first phase cable, the second phase cable, and the third phase cable are electrically and mechanically connected to the first phase conversion unit, the second phase conversion unit, and the third phase conversion unit in a detachable manner, respectively; and
when any one of the first phase conversion unit, the second phase conversion unit, and the third phase conversion unit fails, the converter-side end of one of the first phase cable, the second phase cable, and the third phase cable corresponding to the failed conversion unit is detached from the failed conversion unit and electrically and mechanically connected to the backup terminal conductor unit.
5. The electric power conversion apparatus according to claim 4 , wherein:
the backup terminal conductor unit includes a plurality of terminal parts; and
when any one of the first phase conversion unit, the second phase conversion unit, and the third phase conversion unit fails, one of the first phase cable, the second phase cable, and the third phase cable corresponding to the failed conversion unit is connected to the terminal parts without extension.
6. The electric power conversion apparatus according to claim 4 , wherein the backup terminal conductor unit is made of copper or a copper alloy.