Abstract: An object of the present invention is to provide a power supply device that permits high efficiency and miniaturization, that makes the constitution of a power supply device advantageous from a cost perspective and an assembly work standpoint, and that also allows the cooling fan to be changed rapidly. A protective member H is mounted so as to be displaceable to a removal disabling position in which the protective member H obstructs the removal of the cooling fan F by abutting against the cooling fan F, and to a removal enabling position that permits removal of the cooling fan F. Stopper members, which serve to obstruct movement of the protective member H to the removal disabling position by abutting against the protective member H in a state where the cooling fan F is not disposed in a predetermined position, are provided.

Abstract: An object of the present invention is to provide a power supply device that permits high efficiency and miniaturization, that makes the constitution of a power supply device advantageous from a cost perspective and an assembly work standpoint, and that also allows the cooling fan to be changed rapidly. A protective member H is mounted so as to be displaceable to a removal disabling position in which the protective member H obstructs the removal of the cooling fan F by abutting against the cooling fan F, and to a removal enabling position that permits removal of the cooling fan F. Stopper members, which serve to obstruct movement of the protective member H to the removal disabling position by abutting against the protective member H in a state where the cooling fan F is not disposed in a predetermined position, are provided.

Abstract: It is an object of the present invention to provide an uninterruptible duplexed power supply system that is highly reliable and has excellent durability, with which a more compact size and higher efficiency are both achieved, and with which a malfunction of the power supply circuit can be repaired in a live state. The present invention is characterized in that there are provided a first unit 4 and a second unit 6 having their own power supplies 1, a main component 10 to which the outputs of the first unit 4 and second unit 6 are inputted is equipped with a secondary DC output circuit 8 and a battery-side converter circuit 13, the first unit 4 and the second unit 6 can be attached to and detached from the main component 10 in a live state.

Abstract: It is an object of the present invention to provide an uninterruptible duplexed power supply system that is highly reliable and has excellent durability, with which a more compact size and higher efficiency are both achieved, and with which a malfunction of the power supply circuit can be repaired in a live state. The present invention is characterized in that there are provided a first unit 4 and a second unit 6 having their own power supplies 1, a main component 10 to which the outputs of the first unit 4 and second unit 6 are inputted is equipped with a secondary DC output circuit 8 and a battery-side converter circuit 13, the first unit 4 and the second unit 6 can be attached to and detached from the main component 10 in a live state.

Abstract: The present invention provides an uninterruptible duplexed power supply system, which is capable of achieving high efficiency and compact size, and moreover, is capable of solving for a power circuit failure in an energized state.

Abstract: A switching regulator includes: a boost chopper circuit A including a plurality of inductances 2, 3, 4 and 5 which are connected in parallel with a D.C. power supply 1 for boosting the D.C. power supply 1, a plurality of commutating diodes 6, 7, 8 and 9 which are connected to output sides of those inductances 2, 3, 4 and 5, respectively, a plurality of switching elements 10, 11, 12 and 13 for connecting the D.C. power supply 1 and nodes between the respective inductances 2 to 5 and the respective diodes 6 to 9 in a short-circuiting manner, and a smoothing capacitor 14 connected in series to a combined output section of those diodes 6 to 9; a control circuit 15 for controlling the on/off operation of those switching elements 10 to 13; and a load 16 connected in parallel with the smoothing capacitor 14. The plurality of switching elements 10 to 13 repeatedly operate while the operation of the plurality of switching elements 10 to 13 is sequentially delayed by a predetermined period of time.