Abstract: It is an object of the present invention to provide an uninterruptible switching regulator with which smaller size and lower cost can be achieved while the power supply efficiency is raised, which is accomplished by the effective utilization of an RCC type switching circuit. When the commercial AC input power supply 1 is operating normally, the AC-side RCC type switching circuit 21 is operated preferentially to supply power to the secondary drive circuit 25, but when there is a power outage with the commercial AC power supply 1, the DC-side RCC type switching circuit 69 is operated to supply power to the secondary drive circuit 25, and these two switching circuits can be switched at high speed.

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.

Abstract: An uninterruptive switching regulator includes, at a primary side, a rectifier circuit, a primary winding of a high-frequency transformer, a primary side switching element, and a switching primary winding, and at a secondary side, a secondary side output circuit having a rectifying and smoothing circuit connected, and at a tertiary side, a tertiary winding, a charge and discharge circuit, a tertiary side switching element, an electrical double layer capacitor, and a switching tertiary winding, respectively. An output is transmitted from the primary side and tertiary side to the secondary side by the flyback system, and when the output voltage of the rectifier circuit at the primary side exceeds a predetermined level, the charge circuit operates, whereas when it does not exceed the predetermined level, the discharge circuit operates.

Abstract: A switching regulator includes a primary-side circuit having a rectifier circuit without a smoothing circuit for applying a high-frequency pulse input voltage to a primary side of a high-frequency transformer, a secondary-side circuit including a rectifier circuit and a smoothing circuit at a secondary side of the high-frequency transformer, a superimposing chopping-wave voltage forming circuit for forming a chopping-wave voltage or a saw-tooth-wave voltage in synchronism with a pulse frequency of the primary-side circuit to superimpose a secondary-side d.c.