Non-interruptible power supply control device and UPS module to which the power supply control device is applied

Abstract

To provide an UPS (Uninterruptible Power Supply) module provided with an uninterruptible power supply controller.SOLUTION: An uninterruptible power supply controller 10 applied to an UPS module is provided with a switch 130 including: a semiconductor rectifying element 133 or 134 connected to either one of a positive terminal and a negative terminal of a DC power supply; a bypass electric circuit 131 or 132 for connecting an input terminal and an output terminal of the semiconductor rectifying element so as to bypass the semiconductor rectifying element; a breaker 135 or 136 for opening or closing the bypass electric circuit; and a control unit 100 for controlling the semiconductor rectifying element so as to conduct electric current when a predetermined conduction signal is received, controlling the breaker so as to close the bypass electric circuit, and, when the bypass electric circuit is closed by the breaker, controlling the semiconductor rectifying element so as to interrupt conduction of electric current.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a UPS (Uninterruptible Power Supply) module, and more particularly to a static transfer switch (STS) applied to a UPS module.

Background Art

[0002] Currently, with the development of technology, industrial systems tend to become more sophisticated, and automated and high-speed industrial equipment is being operated in response to such sophisticated industrial systems.

[0003] Due to the automation and high-speed operation of such industrial equipment, if a problem occurs in the power system that supplies power to the industrial equipment, huge losses will occur due to a power outage. In addition, the problem with the power system may cause damage to the industrial equipment itself that is supplied with power, so the damage will be even greater. Therefore, when problems such as sudden power outages or abnormal currents occur in the power system, by introducing a UPS module that supplies alternative power to the load, that is, industrial equipment, using a battery charged with a predetermined amount of current, stable power can be supplied even if an abnormality occurs in the power system of the commercial power supply.

[0004] However, usually, a UPS module supplies alternative power using a battery. Therefore, there is a problem that when all the current charged in the battery is discharged, the power supply to the load is interrupted.

[0005] Thus, since the supply time of alternative power of a normal UPS device is limited according to the charging capacity of the battery, a battery with a larger charging capacity is required. However, in the case of a battery, the price is determined according to the charging capacity, so there is a problem that the price of the UPS device increases along with the charging capacity of the battery.

[0006] As a method for solving the above problems, there has emerged a UPS module that not only has a battery but also further includes a path connected to a backup power source (hereinafter referred to as a Bypass power source) so that power is supplied from the backup power source. In such a UPS module, even after all the batteries are discharged, power is supplied from the backup power source and power can be supplied to the load. Therefore, there is an advantage that power is supplied to the load even when all the batteries are discharged.

[0007] However, in advanced industrial equipment, uninterrupted power supply is required. Therefore, when a backup power source is connected, there is a problem that switching of the power supply path to the path to which the backup power source is connected must be performed in a very short time. Thus, currently, methods for performing the switching of the power supply path to the backup power source in a shorter time are actively being studied.

Summary of the Invention

Problems to be Solved by the Invention

[0008] An object of the present invention is to solve the above problems and other problems, and to provide an uninterruptible power supply control device and a UPS module that can perform switching of the power supply path at a higher speed.

[0009] Another object of the present invention is to provide an uninterruptible power supply control device and a UPS module that can receive current supply from a backup power source and transmit it to a load in a shorter time when the power supplied from a commercial power source and a battery is interrupted.

Means for Solving the Problems

[0010] According to one aspect of the present invention for achieving the above object or other objects, a switch according to an embodiment of the present invention includes one semiconductor rectifying element connected to either the positive terminal or the negative terminal of a DC power supply, a bypass circuit (electric circuit) connecting the input terminal and the output terminal of the semiconductor rectifying element so as to bypass the semiconductor rectifying element, a circuit breaker for opening or closing the bypass circuit, and a control unit that controls the semiconductor rectifying element so that current conducts when a predetermined conduction signal is received, and controls the circuit breaker so that the bypass circuit is closed, and controls the semiconductor rectifying element so that conduction of current is interrupted when the bypass circuit is closed by the circuit breaker.

[0011] In one embodiment, the semiconductor rectifying element is a silicon controlled rectifier (SCR).

[0012] In one embodiment, the control unit simultaneously controls the silicon controlled rectifier and the circuit breaker according to the conduction signal, and when current conducts first through the silicon controlled rectifier due to the difference in operating speed between the silicon controlled rectifier and the circuit breaker, detects whether the bypass circuit is closed, and controls the silicon controlled rectifier so that conduction of current is interrupted according to the detection result.

[0013] In one embodiment, it further includes a second semiconductor rectifying element connected to an extreme different from the extreme of the DC power supply to which the semiconductor rectifying element and the bypass circuit of the embodiment are connected, a second bypass circuit connecting the input terminal and the output terminal of the second semiconductor rectifying element so as to bypass the second semiconductor rectifying element, and a second circuit breaker for opening or closing the second bypass circuit and controlled by the control unit. When the conduction signal is received, the control unit controls the second semiconductor rectifying element so that current conducts, and controls the second circuit breaker so that the second bypass circuit is closed, and further controls the semiconductor rectifying element so that conduction of current is interrupted when the second bypass circuit is closed by the second circuit breaker.

[0014] In one embodiment, the semiconductor rectifying element and the second semiconductor rectifying element are arranged such that the forward current direction coincides with the current direction of the DC power supply, and are arranged in different directions depending on the polarity of the DC power supply to which they are connected.

[0015] In one embodiment, the control unit determines whether the bypass circuit is closed based on the feedback signal received from the circuit breaker or the voltage change of the current supplied through the bypass circuit or the semiconductor rectifying element.

[0016] According to one aspect of the present invention for achieving the above object or other objects, a non-interruptible power supply control device according to an embodiment of the present invention includes an AC-DC converter that converts an alternating current supplied from a predetermined AC power supply into a direct current, a first and a second semiconductor rectifying element respectively connected to the positive and negative electrodes of the output terminal of the AC-DC converter, first and second bypass circuits that connect the input terminals and the output terminals of the first and second semiconductor rectifying elements so as to bypass the first and second semiconductor rectifying elements, first and second circuit breakers that open or close the first and second bypass circuits, and when a predetermined conduction signal is received, the positive and negative electrodes of the output terminal of the AC-DC converter conduct current through either a first path through the first and second semiconductor rectifying elements or a second path through the first and second bypass circuits, and a control unit that controls the first and second semiconductor rectifying elements or the first and second circuit breakers.

[0017] In one embodiment, the first and second semiconductor rectifying elements are silicon controlled rectifying elements respectively.

[0018] In one embodiment, when the conduction signal is received, the control unit turns on the first and second silicon controlled rectifier elements so that current conducts, and controls the first and second circuit breakers so that the first and second bypass circuits are closed. Current conducts first through the first and second silicon controlled rectifier elements according to the difference in the operating speeds of the silicon controlled rectifier elements and the circuit breakers. When the first and second bypass circuits are closed while current is conducting through the first and second silicon controlled rectifier elements, the first and second silicon controlled rectifier elements are turned off, which is characteristic.

[0019] In one embodiment, the control unit determines whether the first and second bypass circuits are closed based on a feedback signal from the first and second circuit breakers or a voltage change of a current supplied through the first and second bypass circuits or the first and second silicon controlled rectifier elements, which is characteristic.

[0020] In one embodiment, before the first and second bypass circuits are closed, when current conducts through the first and second silicon controlled rectifier elements, current at the positive and negative electrodes of the AC-DC converter output terminal is output through the first path. When the first and second bypass circuits are closed while current is conducting through the first and second silicon controlled rectifier elements, current at the positive and negative electrodes of the AC-DC converter output terminal is output through both the first path and the second path. When the first and second silicon controlled rectifier elements are turned off while the first and second bypass circuits are closed, current at the positive and negative electrodes of the AC-DC converter output terminal is output only through the second path, which is characteristic.

[0021] In one embodiment, the AC-DC converter includes a rectifier element bridge having a plurality of rectifier elements, and the rectifier elements are diodes or silicon controlled rectifier elements, which is characteristic.

[0022] In one embodiment, the predetermined AC power supply is an emergency power supply that supplies power to a load through a path different from that of a commercial power supply, and the predetermined conduction signal is a signal for controlling the control unit so that a current supplied from the emergency power supply is output, and is received from another power supply control device connected to the commercial power supply.

[0023] According to one aspect of the present invention for achieving the above object or other objects, a UPS module according to an embodiment of the present invention includes a first power supply control module having a first AC / DC converter that converts an AC current supplied from a commercial power supply into a DC current and outputs it, a second power supply control module having a DC / DC converter that stabilizes a DC current supplied from a battery or converts another voltage into a DC current and outputs it, a third power supply control module having a second AC / DC converter that converts an AC current supplied from an emergency power supply into a DC current and outputs it, and an output end of the first to third power supply control modules are connected to each other to form a common output end that supplies a DC current output from any one of the first to third power supply control modules to a load. The third power supply control module is connected in parallel between an output end of the second AC / DC converter and the common output end through a pair of circuit breakers and silicon controlled rectifier elements. The pair of circuit breakers and silicon controlled rectifier elements are characterized in that one circuit breaker and one silicon controlled rectifier element form a pair and are connected in parallel between the output end of the second AC / DC converter and the common output end.

[0024] In one embodiment, the third power supply control module includes first and second silicon controlled rectifier elements that connect the positive and negative electrodes of the output terminal of the second AC / DC converter to the positive and negative output terminals of the third power supply control module, respectively; first and second bypass circuits that connect the input and output terminals of each silicon controlled rectifier element so as to bypass the first and second silicon controlled rectifier elements, respectively; first and second circuit breakers that open or close the first and second bypass circuits; a switch control unit that turns on the first and second silicon controlled rectifier elements so that current conducts when a predetermined conduction signal is received, controls the first and second circuit breakers so that the first and second bypass circuits are closed, and turns off the first and second silicon controlled rectifier elements when the first and second bypass circuits are closed in a state where current has first conducted through the first and second silicon controlled rectifier elements according to the operating speed difference between the silicon controlled rectifier elements and the circuit breakers. The third power supply control module is characterized by comprising a switch including the above components.

[0025] In one embodiment, the conduction signal is received from the first control unit of the first power supply control module, and the first control unit transmits the predetermined conduction signal to the switch control unit when both the power supply from the commercial power supply and the power supply from the battery are interrupted.

[0026] In one embodiment, the first and second circuit breakers close the first and second bypass circuits under the control of the switch control unit in an initial (default) state where the first and second bypass circuits are open, and the first and second silicon controlled rectifier elements are turned on under the control of the switch control unit in an initial state where they are turned off.

[0027] In one embodiment, a plurality of circuit breakers are provided between the commercial power supply and the common output terminal, and between the battery and the common output terminal, respectively. The plurality of circuit breakers are configured to cut off the connection between the commercial power supply and the common output terminal, or between the battery and the common output terminal when an overcurrent flows from the commercial power supply or the battery in an initial state formed to connect the commercial power supply and the common output terminal, or the battery and the common output terminal.

[0028] According to one aspect of the present invention for achieving the above object or other objects, a UPS module according to an embodiment of the present invention is connected to a commercial power supply and a battery, and includes a first AC / DC converter that converts an alternating current supplied from the commercial power supply into a direct current, and a DC / DC converter that stabilizes a direct current supplied from the battery or converts another voltage into a direct current. A first module that outputs either the current supplied from the commercial power supply or the current supplied from the battery through a first output terminal formed by connecting the output of the first AC / DC converter and the output of the DC / DC converter to each other; a second module that has a second AC / DC converter that converts an alternating current supplied from a standby power supply into a direct current and outputs it; and a second output terminal formed by connecting the first output terminal and the output terminal of the second module to each other, and supplying the direct current output from either the first module or the second module to a load. The second module is characterized in that the output terminal of the second AC / DC converter and the second output terminal are connected in parallel via a pair of circuit breakers and silicon controlled rectifier elements, and the pair of circuit breakers and silicon controlled rectifier elements are formed by a pair of one circuit breaker and one silicon controlled rectifier element, and are connected in parallel between the output terminal of the second AC / DC converter and the second output terminal.

[0029] In one embodiment, the second module includes first and second silicon controlled rectifier elements that connect the positive and negative electrodes of the output terminal of the second AC-DC converter to the positive and negative output terminals of the second module respectively, first and second bypass circuits that connect the input and output terminals of each silicon controlled rectifier element so as to bypass the first and second silicon controlled rectifier elements respectively, first and second circuit breakers that control the open or closed state of the first and second bypass circuits, a switch control unit that turns on the first and second silicon controlled rectifier elements so that current conducts when a predetermined conduction signal is received, controls the first and second circuit breakers so that the first and second bypass circuits are closed, current conducts first through the first and second silicon controlled rectifier elements according to the operating speed difference between the silicon controlled rectifier elements and the circuit breakers, and turns off the first and second silicon controlled rectifier elements when the first and second bypass circuits are closed while current is conducting through the first and second silicon controlled rectifier elements. It is characterized by comprising a switch.

[0030] In one embodiment, the first module is controlled by a first control unit, and the first control unit transmits the predetermined conduction signal to the switch control unit when both the power supply from the commercial power supply and the power supply from the battery are interrupted.

Effects of the Invention

[0031] Hereinafter, the effects of the uninterruptible power supply control device according to the present invention and the UPS module to which the uninterruptible power supply control device is applied will be described.

[0032] According to at least one of the embodiments of the present invention, the present invention can reduce the number of silicon controlled rectifier elements provided and shorten the required time until current is supplied to the load by inputting a direct current and supplying the input direct current through either one silicon controlled rectifier element or a bypass circuit that bypasses the silicon controlled rectifier element.

[0033] According to at least one of the embodiments of the present invention, the present invention includes an AC-DC converter in front of an uninterruptible power supply control device, such that an alternating current supplied from a standby power supply is converted into a direct current having a voltage at a certain level, and the converted direct current is supplied to the uninterruptible power supply control device, whereby the uninterruptible power supply control device can supply the current of the standby power supply to a load via either one silicon controlled rectifier element and a bypass circuit that bypasses the silicon controlled rectifier element, achieving the effect that the current of the standby power supply can be supplied to the load.

Brief Description of the Drawings

[0034]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0035] Hereinafter, with reference to the accompanying drawings, the embodiments disclosed in this specification will be described in detail. However, the same or similar components are denoted by the same reference numerals regardless of the drawing numbers, and redundant descriptions will be omitted. The suffixes "module" and "section" of the components used in the following description are given or mixed for the convenience of preparing the specification, and do not have any significance or usefulness in themselves. In addition, when explaining the embodiments disclosed in this specification, if it is determined that a specific description of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed description thereof will be omitted. Note that the accompanying drawings are only for facilitating the understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the accompanying drawings. It should be understood that all changes, equivalents, or alternatives included in the spirit and technical scope of the present invention are included in the present invention.

[0036] Terms including ordinal numbers such as first, second, etc. are used to describe various components, but do not limit the components. The above terms are used only for the purpose of distinguishing one component from another.

[0037] When a component is referred to as "connected" or "connected to" another component, it should be understood that it may be directly connected or connected to the other component, or there may be additional components in between. In contrast, when a component is referred to as "directly connected" or "directly connected to" another component, it should be understood that there are no additional components in between.

[0038] Singular expressions include plural expressions unless otherwise specified.

[0039] As used in the present invention, "comprising", "having", etc. indicate the presence of the features, numbers, steps, operations, components, parts or combinations thereof described in the specification, and do not preclude the presence or addition possibility of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0040] First, FIG. 1 is a block diagram for explaining an uninterruptible power supply control device 10 according to the present invention.

[0041] As shown in FIG. 1, the uninterruptible power supply control device 10 according to the present invention includes a control unit 100 and a switch 130 controlled by the control unit 100, and further includes an AC-DC converter 120 that converts an input alternating current into a direct current. Also, the positive and negative terminals of the switch 130 are connected to the positive output terminal P and the negative output terminal N of the uninterruptible power supply control device 10, respectively. Further, a direct current converted by the AC-DC converter 120 is output via the output terminals (positive output terminal P and negative output terminal N) of the uninterruptible power supply control device 10.

[0042] Here, the AC-DC converter 120 converts an input polyphase alternating current into a direct current. For this purpose, the AC-DC converter 120 includes a bridge rectifier circuit to which a plurality of rectifying elements are connected. The rectifying element is a diode or a silicon controlled rectifier element. However, in the following description, it will be assumed that the rectifying element is a diode for explanation.

[0043] The diodes provided in the AC-DC converter 120 are wired in a bridge shape as shown in FIG. 1. Here, when the input alternating current is a three-phase (R phase, S phase, T phase) alternating current 110, the AC-DC converter 120 includes six diodes D1 to D6 wired in the bridge shape shown in FIG. 1 to convert the three-phase alternating current 110 into a direct current.

[0044] Also, as shown in FIG. 1, when a three-phase alternating current 110 is input, each phase voltage (R-phase voltage / S-phase voltage / T-phase voltage) is applied to each diode of the AC-DC converter 120. More specifically, the R-phase voltage is applied to the first diode D1 and the second diode D2, the S-phase voltage is applied to the third diode D3 and the fourth diode D4. Also, the T-phase voltage is applied to the fifth diode D5 and the sixth diode D6. Further, each diode full-wave rectifies the voltage corresponding to each phase.

[0045] Also, the AC-DC converter 120 sequentially outputs each full-wave rectified phase voltage (Vr / Vs / Vt). Therefore, since the output voltage undergoes a smoothing effect, the three-phase alternating current input to the AC-DC converter 120 is converted into a direct current and output.

[0046] On the other hand, between the three-phase alternating current 110 and the AC-DC converter 120, at least one circuit breaker 112 such as an MCCB (Molded Circuit Breaker) or an ACB (Air Circuit Breaker) is provided so as to protect the circuit of the uninterruptible power supply control device 10 from overcurrent or arc.

[0047] Also, the switch 130 connects each of the output end of the AC-DC converter 120 and the output end of the uninterruptible power supply control device 10 in parallel via a semiconductor rectifying element and a circuit breaker.

[0048] The semiconductor rectifying element is a high-speed large current and high voltage switching element with a response speed and an operating speed equal to or higher than a predetermined speed, capable of controlling a large amount of power, and having a semi-permanent life. An example of such a semiconductor rectifying element is a silicon controlled rectifier. In the following description, it will be assumed that a silicon controlled rectifier is provided as the semiconductor rectifying element.

[0049] More specifically, the switch 130 includes a first silicon controlled rectifier element 133 disposed between the positive terminal of the output terminal of the AC / DC converter 120 and the positive output terminal P of the uninterruptible power supply control device 10. Here, the first silicon controlled rectifier element 133 is arranged such that the forward current direction coincides with the current direction of the positive terminal current of the output terminal of the AC / DC converter 120, that is, the positive current.

[0050] Also, the switch 130 includes a first bypass circuit 131 that connects the input terminal and the output terminal of the first silicon controlled rectifier element 133, bypasses the first silicon controlled rectifier element 133, and connects the positive terminal of the output terminal of the AC / DC converter 120 and the positive output terminal P of the uninterruptible power supply control device 10, and a first circuit breaker 135 that controls the open or closed state of the first bypass circuit 131.

[0051] Therefore, the positive terminal of the AC / DC converter 120 is electrically connected to the positive output terminal P of the uninterruptible power supply control device 10 via either the first silicon controlled rectifier element 133 or the first bypass circuit 131 (when the first bypass circuit 131 is closed).

[0052] The switch 130 also includes a second silicon controlled rectifier element 134 disposed between the negative terminal of the output terminal of the AC / DC converter 120 and the negative output terminal N of the uninterruptible power supply control device 10. Here, the second silicon controlled rectifier element 134 is arranged such that the forward current direction coincides with the current direction of the negative terminal current of the output terminal of the AC / DC converter 120, that is, the negative current.

[0053] Furthermore, the switch 130 includes a second bypass circuit 132 that connects the input terminal and the output terminal of the second silicon controlled rectifier element 134, bypasses the second silicon controlled rectifier element 134, and connects the negative terminal of the output terminal of the AC / DC converter 120 and the negative output terminal N of the uninterruptible power supply control device 10, and a second circuit breaker 136 that controls the open or closed state of the second bypass circuit 132.

[0054] Therefore, the negative terminal of the AC / DC converter 120 is electrically connected to the negative output terminal N of the uninterruptible power supply control device 10 via either the second silicon controlled rectifier 134 or the second bypass circuit 132 (when the second bypass circuit 132 is closed).

[0055] In addition, a first DC reactor 141 and a second DC reactor 142 are further disposed between the output terminals of the first silicon controlled rectifier 133 and the second silicon controlled rectifier 134 and the positive output terminal P and the negative output terminal N of the uninterruptible power supply control device 10, respectively. Here, the first DC reactor 141 and the second DC reactor 142 are inductive reactors between the DC output and the load, which limit the fault current and control the pulsation of the load.

[0056] On the other hand, when a predetermined conduction signal is received, the control unit 100 controls the first silicon controlled rectifier 133, the second silicon controlled rectifier 134, the first circuit breaker 135, and the second circuit breaker 136 so that the output terminal of the AC / DC converter 120 and the output terminal of the uninterruptible power supply control device 10 are electrically connected via either each silicon controlled rectifier or each bypass circuit.

[0057] Here, the three-phase alternating current 110 is a predetermined standby power supply (Bypass power supply). In this case, the conduction signal is a signal transmitted to the control unit 100 to supply the power of the standby power supply to the load when the power supply is interrupted while the alternative power is being supplied to the load via the battery due to a problem occurring in the power system of the commercial power supply.

[0058] In this case, the control unit 100 that has received the conduction signal controls the switch 130 so that the output terminal of the AC / DC converter 120 and the output terminal of the uninterruptible power supply control device 10 are electrically connected within the time required for uninterruptible power supply (for example, 4 ms). Thus, when the output terminal of the AC / DC converter 120 and the output terminal of the uninterruptible power supply control device 10 are electrically connected, the alternating current supplied from the standby power supply is output in the form of a direct current and supplied to the load (the power conversion device connected to the load).

[0059] On the one hand, since the silicon controlled rectifier elements 133 and 134 have a very fast response speed (operating speed) due to the characteristics of the elements, the output terminals (positive terminal and negative terminal) of the AC / DC converter 120 and the output terminals (positive output terminal P and negative output terminal N) of the uninterruptible power supply control device 10 are made conductive in a very short time. On the other hand, since they are semiconductor elements, when the current conduction time becomes long, heat generation occurs due to this, and circuit damage due to heat generation occurs.

[0060] On the other hand, the circuit breakers 135 and 136 have the advantage that heat generation does not occur, but since the response speed (operating speed) is slow, it is difficult to make the output terminals (positive terminal and negative terminal) of the AC / DC converter 120 and the output terminals (positive output terminal P and negative output terminal N) of the uninterruptible power supply control device 10 conductive within the time required for uninterruptible power supply.

[0061] Therefore, the control unit 100 turns on the silicon controlled rectifier element that can perform high-speed switching first, and makes the output terminal of the AC / DC converter 120 and the output terminal of the uninterruptible power supply control device 10 conductive. Thus, when the output terminal of the AC / DC converter 120 and the output terminal of the uninterruptible power supply control device 10 are made conductive through the bypass circuit, the silicon controlled rectifier element is turned off, and the conduction of the current through the silicon controlled rectifier element is interrupted.

[0062] Therefore, the control unit 100 makes the output terminal of the AC / DC converter 120 and the output terminal of the uninterruptible power supply control device 10 conductive within the time required for the uninterruptible power supply, and prevents damage from occurring due to heat generation of the silicon controlled rectifier element.

[0063] FIGS. 2 to 4 are diagrams for more detailedly explaining an example of the process in which the current of the standby power supply is supplied to the load through the silicon controlled rectifier element or the bypass circuit under the control of the control unit 100 in the uninterruptible power supply control device 10 according to the present invention.

[0064] First, when a predetermined conduction signal is not received, the output terminal of the AC / DC converter 120 and the output terminal of the uninterruptible power supply control device 10 are maintained in a state where they are not connected to each other. That is, the first silicon-controlled rectifier element 133 and the second silicon-controlled rectifier element 134 are in the turned-off state, and the first bypass circuit 131 and the second bypass circuit 132 are in the open state opened by the open first circuit breaker 135 and second circuit breaker 136.

[0065] In this state, when the predetermined conduction signal is received, the control unit 100 simultaneously controls the first silicon-controlled rectifier element 133 and the second silicon-controlled rectifier element 134 and the first circuit breaker 135 and the second circuit breaker 136, turns on the first silicon-controlled rectifier element 133 and the second silicon-controlled rectifier element 134, and closes the first circuit breaker 135 and the second circuit breaker 136. In this case, a control signal (turn-on signal) for turning on the first silicon-controlled rectifier element 133 and the second silicon-controlled rectifier element 134 and a control signal (close signal) for closing the first circuit breaker 135 and the second circuit breaker 136 are simultaneously output and input to the switch 130 (200).

[0066] Then, the turn-on signal and the close signal are simultaneously received by the first silicon-controlled rectifier element 133 and the second silicon-controlled rectifier element 134 and the first circuit breaker 135 and the second circuit breaker 136, respectively. However, as described above, since the operating speed of the silicon-controlled rectifier element is much faster than the operating speed of the circuit breaker, the first silicon-controlled rectifier element 133 and the second silicon-controlled rectifier element 134 are turned on first before the first circuit breaker 135 and the second circuit breaker 136 are closed.

[0067] Therefore, before the first bypass circuit 131 and the second bypass circuit 132 are closed, the output terminal of the AC-DC converter 120 and the output terminal of the uninterruptible power supply control device 10 are electrically connected through the turned-on first silicon controlled rectifier element 133 and second silicon controlled rectifier element 134. Therefore, as shown in the current output paths 210 and 220 of FIG. 2, the alternating current supplied from the standby power supply is output in the form of a direct current through the silicon controlled rectifier elements 133 and 134 and supplied to the load (the power conversion device connected to the load).

[0068] On the other hand, the first bypass circuit 131 and the second bypass circuit 132 are closed in a state where the output terminal of the AC-DC converter 120 and the output terminal of the uninterruptible power supply control device 10 are electrically connected through the first silicon controlled rectifier element 133 and the second silicon controlled rectifier element 134 in advance according to the difference in the operating speeds of the silicon controlled rectifier element and the circuit breaker.

[0069] In this case, as shown in FIG. 3, the output terminal of the AC-DC converter 120 and the output terminal of the uninterruptible power supply control device 10 are electrically connected not only through the first silicon controlled rectifier element 133 and the second silicon controlled rectifier element 134 but also through the first bypass circuit 131 and the second bypass circuit 132. Therefore, as shown in FIG. 3, the alternating current supplied from the standby power supply is output in the form of a direct current not only through the paths 210 and 220 passing through the first silicon controlled rectifier element 133 and the second silicon controlled rectifier element 134 but also through the paths 310 and 320 passing through the first bypass circuit 131 and the second bypass circuit 132 and supplied to the load (the power conversion device connected to the load). On the other hand, as the number of paths for supplying current to the load increases, the voltage of the previously electrically connected paths (the paths 210 and 220 through which current is supplied through the first silicon controlled rectifier element 133 and the second silicon controlled rectifier element 134) decreases.

[0070] On the one hand, when the first circuit breaker 135 and the second circuit breaker 136 are closed, the control unit 100 detects that the first bypass circuit 131 and the second bypass circuit 132 are closed (300). For example, when the control unit 100 receives a feedback signal from the first circuit breaker 135 and the second circuit breaker 136, it determines that the first circuit breaker 135 and the second circuit breaker 136 are closed. Alternatively, based on the voltage changes in the paths 210 and 220 through which current is supplied via the first silicon controlled rectifier element 133 and the second silicon controlled rectifier element 134, it is detected whether the first bypass circuit 131 and the second bypass circuit 132 are closed. Alternatively, based on the voltages detected from the first bypass circuit 131 and the second bypass circuit 132, it is detected whether the first bypass circuit 131 and the second bypass circuit 132 are closed.

[0071] Thus, when detecting the closing of the first bypass circuit 131 and the second bypass circuit 132, the control unit 100 transmits a turn-off signal to the first silicon controlled rectifier element 133 and the second silicon controlled rectifier element 134. Then, the first silicon controlled rectifier element 133 and the second silicon controlled rectifier element 134 that receive it are converted to the turn-off state, so that the conduction of the current through the first silicon controlled rectifier element 133 and the second silicon controlled rectifier element 134 is interrupted.

[0072] Therefore, as shown in FIG. 4, only through the closed first bypass circuit 131 and the second bypass circuit 132, the output terminal of the AC / DC converter 120 and the output terminal of the uninterruptible power supply control device 10 are conducted. Therefore, the alternating current supplied from the standby power supply is output in the form of a direct current through the first bypass circuit 131 and the second bypass circuit 132.

[0073] As shown in FIGS. 2 to 4, in the present invention, a silicon controlled rectifier element and a circuit breaker are connected in parallel, and when a predetermined conduction signal is received, a standby power supply is connected via the silicon controlled rectifier element prior to the circuit breaker, so that power is supplied to the load without interruption (no momentary interruption). Further, when the standby power supply is connected via the circuit breaker according to the difference in operating speed, by cutting off the connection of the standby power supply via the silicon controlled rectifier element, it is possible to prevent the generation of heat due to current conduction in the silicon controlled rectifier element including a semiconductor element.

[0074] Also, in the non-interruptible power supply control device 10 according to an embodiment of the present invention, an AC / DC converter 120 is connected to a standby power supply that supplies a multiphase alternating current so that the multiphase alternating current is converted into a direct current. Further, by maintaining the state where the silicon controlled rectifier element is turned off and the circuit breaker is open as the initial state of the switch 130, the converted direct current is input to the switch 130, and the current flowing to the load through the switch 130 is cut off, and the voltage at the input end of the cutoff unit is maintained at a certain level or higher until a predetermined conduction signal is received.

[0075] Therefore, when the switch 130 is controlled by the control unit 100, the output end of the AC / DC converter 120 and the output end of the non-interruptible power supply control device 10 are conducted, and when the current of the standby power supply flows to the load, the direct current whose voltage is maintained is immediately supplied to the load (or a power conversion device connected to the load) through the switch 130. Therefore, since the current conversion (AC / DC conversion) does not take time and the converted direct current is immediately output, when the supply of current via the commercial power supply and the battery is interrupted, the current of the standby power supply is supplied to the load without interruption.

[0076] Thus, the uninterruptible power supply control device 10 of the present invention is a device that receives a direct current and controls the supply of the input direct current to a load. As shown in FIGS. 1 to 4, it has a structure in which one circuit breaker is connected in parallel with one silicon controlled rectifier element. In this way, the internal structure of the uninterruptible power supply control device 10 can be simplified by a pair of one circuit breaker and one silicon controlled rectifier element, and the time until the current of the backup power supply is supplied to the load can be shortened by the simplified structure.

[0077] On the other hand, FIG. 5 is a block diagram showing an embodiment of a UPS module including the uninterruptible power supply control device 10 according to the present invention described above.

[0078] As shown in FIG. 5, the UPS module according to the embodiment of the present invention is divided into a power supply side power conversion unit and a load side power conversion unit.

[0079] Here, the power supply side power conversion unit includes a plurality of power supply sources, and converts the power supplied from each of the plurality of power supply sources into a direct current power supply and outputs it. Further, the load side power conversion unit includes a plurality of loads, converts the direct current power supply output from the power supply side power conversion unit into a driving power supply, and supplies it to each of the plurality of loads.

[0080] First, the power supply side power conversion unit includes a plurality of power supply control modules 510, 520, 530 whose outputs are connected to each other. Here, the first power supply control module 510 converts the power supplied from the commercial power supply 511 into a direct current power supply and outputs it. Also, the second power supply control module 520 outputs the power supplied from the battery 521. Furthermore, the third power supply control module 530 is a module that converts the power supplied from the backup power supply 531 into a direct current power supply and outputs it, and includes the uninterruptible power supply control device 10 having an AC / DC converter 120 and a switch 130 as described in FIGS. 1 to 4.

[0081] On the one hand, the load-side power conversion unit includes at least one load 560 and at least one conversion unit 550 that converts the DC power supplied from the power-source-side power conversion unit into a driving power source. Here, depending on whether the load 560 is a load driven by an AC power source or a load driven by a DC power source, the conversion unit 550 includes at least one inverter that converts the DC power into an AC power source, or an inverter that converts the DC power into a DC power source with a different voltage. Also, each inverter is connected to each load, and the power converted through the connected inverter is supplied to each load as a driving power source.

[0082] On the other hand, the output terminals of each power supply control module 510, 520, 530 that constitutes the power-source-side power conversion unit are connected to each other to form a common output terminal. Also, the load-side power conversion unit is connected to the common output terminal, and converts the DC current supplied through the common output terminal into a driving power source and supplies it to the load.

[0083] Hereinafter, the power supply control module that constitutes the power-source-side power conversion unit will be described in detail. First, the first power supply control module 510 connected to the commercial power supply 511 and supplied with power from the commercial power supply 511 includes a first AC / DC converter 513 for converting the AC current input from the commercial power supply 511 into a DC current.

[0084] Also, a first-1 circuit breaker 512 for protecting the first AC / DC converter 513 from overcurrent and arc generated from the commercial power supply 511 is disposed between the first AC / DC converter 513 and the commercial power supply 511. Further, a first-2 circuit breaker 514 for protecting the internal system including the common output terminal is included between the common output terminal and the first AC / DC converter 513. Furthermore, a first control unit 515 for controlling the overall operation of the first power supply control module 510 and each component of the first power supply control module 510 is included.

[0085] Here, the first breaker 512 and the second breaker 514 are in the closed state as the initial state, and maintain the closed state (the state where the circuit is connected) as long as no abnormal current such as an overcurrent occurs.

[0086] Also, the second power supply control module 520 connected to the battery 521 and supplied with power from the battery 521 includes a DC / DC converter 523 for stabilizing the DC current input from the battery 521 or converting it into a DC current of a different voltage.

[0087] Furthermore, a first breaker 522 for protecting the DC / DC converter 523 when an abnormal voltage or current occurs is disposed between the DC / DC converter 523 and the battery 521. Further, a second breaker 524 for protecting the internal system including the common output terminal is included between the common output terminal and the DC / DC converter 523. Further, a second control unit 525 for controlling the overall operation of the second power supply control module 520 and each component of the second power supply control module 520 is included.

[0088] Here, the first breaker 522 and the second breaker 524 are in the closed state as the initial state, and maintain the closed state (the state where the circuit is connected) as long as no abnormal current such as an overcurrent occurs.

[0089] On the other hand, the third power supply control module 530 connected to the backup power supply 531 and supplied with power from the backup power supply 531 includes a second AC / DC converter 120 for converting the AC current input from the backup power supply 531 into a DC current. Also, a third breaker 532 for protecting the second AC / DC converter 120 from the overcurrent and arc generated from the backup power supply 531 is disposed between the second AC / DC converter 120 and the backup power supply 531. Here, the third breaker 532 is in the closed state as the initial state, and maintains the closed state as long as no abnormal current such as an overcurrent occurs.

[0090] Furthermore, between the output terminal of the second AC / DC converter 120 and the common output terminal, a switch 130 including a silicon controlled rectifier element and a circuit breaker connected in parallel is included. Furthermore, a third control unit 535 for controlling the switch 130 is included.

[0091] Here, the third control unit 535 is the control unit 100 of the uninterruptible power supply device 10 according to the embodiment of the present invention described with reference to FIGS. 1 to 4. In this case, the second AC / DC converter 120, the switch 130, and the third control unit 535 constitute the uninterruptible power supply device 10 according to the embodiment of the present invention described with reference to FIGS. 1 to 4.

[0092] Therefore, the switch 130 has an open state as its initial state, and maintains an open state (a state in which the circuit connection is interrupted) unless its state is changed by the third control unit 535.

[0093] On the other hand, the power supply side power conversion unit is controlled by the control units 515, 525, and 535 of the respective power supply control modules 510, 520, and 530 so that any one of the power supply control modules supplies a direct current through the common output terminal.

[0094] Preferably, the first control unit 515 of the first power supply control module 510 connected to the commercial power supply 511 is the main control unit. In that case, any one of the power supply control modules supplies a direct current through the common output terminal under the control of the main control unit.

[0095] More specifically, the first control unit 515 first controls so that power is supplied through the first power supply control module. Therefore, the alternating current supplied from the commercial power supply 511 is converted into a direct current through the first AC / DC converter 513, and the converted direct current is supplied to the load side power conversion unit through the common output terminal.

[0096] In this state, if an abnormality occurs in the power system of the commercial power supply 511, for example, if an overcurrent occurs, the first breaker 512 or the first-2 breaker 514 is opened, and the connection between the commercial power supply 511 and the common output terminal is cut off.

[0097] In this case, power is supplied to the load-side power conversion unit via the second power supply control module 520 or the third power supply control module 530 connected to the common output terminal. However, in the third power supply control module 530, the switch 130 is in an initially open state and the circuit is not connected. Therefore, a direct current supplied from the battery 521 is supplied to the load-side power conversion unit via the second power supply control module 520.

[0098] On the other hand, when the commercial power supply 511 is restored while the direct current of the battery 521 is being supplied to the load-side power conversion unit in this way, the first control unit 515 closes the opened first breaker 512 or first-2 breaker 514 again and reconnects the commercial power supply 511. Then, the current supplied from the commercial power supply 511 again is supplied to the load-side power conversion unit via the common output terminal.

[0099] However, if the battery 521 is completely discharged before the commercial power supply 511 is restored, the second control unit 525 transmits a feedback signal notifying the discharge of the battery 521 to the first control unit 515, which is the main control unit. Then, the first control unit 515 transmits a predetermined conduction signal to the third control unit 535, and the third control unit 535 controls the switch 130 to conduct the output terminal of the second AC / DC converter 120 and the common output terminal.

[0100] In this case, the third control unit 535 inputs a control signal (for example, a turn-on signal for the silicon controlled rectifier element and a close signal for the breaker) for connecting the circuit to the silicon controlled rectifier element and the breaker connected in parallel as described above to the switch 130. Then, the control signal is input to the silicon controlled rectifier element and the breaker at the same time.

[0101] On the one hand, even if a control signal is received by the silicon-controlled rectifier and the circuit breaker simultaneously, the silicon-controlled rectifier with a much faster operating speed connects the circuit before the circuit breaker. Therefore, primarily, the output terminal of the second AC / DC converter 120 and the common output terminal are conducted through the silicon-controlled rectifier, and the current supplied from the standby power supply 531 through the silicon-controlled rectifier is supplied to the load-side power conversion unit through the common output terminal. Therefore, when the battery 521 is completely discharged, the current of the standby power supply 531 is supplied without interruption.

[0102] On the other hand, the circuit breaker of the switch 130 that has received the control signal connects the circuit later than the silicon-controlled rectifier according to the difference in operating speed. Therefore, secondarily, the output terminal of the second AC / DC converter 120 and the common output terminal are conducted through the circuit breaker.

[0103] In this case, the output terminal of the second AC / DC converter 120 and the common output terminal are connected through both a first path via the silicon-controlled rectifier and a second path via the circuit breaker. In this case, the current supplied from the standby power supply 531 is supplied to the load-side power conversion unit through the common output terminal via the first path and the second path.

[0104] On the one hand, when the output terminal of the second AC / DC converter 120 and the common output terminal are connected through the second path, the third control unit 535 inputs a control signal for turning off the silicon-controlled rectifier to the switch 130.

[0105] Then, the silicon-controlled rectifier is turned off, and as a result, the output terminal of the second AC / DC converter 120 and the common output terminal are connected only through the second path via the circuit breaker. Therefore, the current supplied from the standby power supply 531 through the second path is supplied to the load-side power conversion unit through the common output terminal.

[0106] On the one hand, in the description of FIG. 5 above, the case where the power supply control module (first power supply control module) connected to the commercial power supply 511 and the power supply control module (second power supply control module) connected to the battery 521 are provided as independent modules was taken as an example for explanation. However, it goes without saying that the first power supply control module and the second power supply control module may be integrated into one module.

[0107] FIG. 6 shows an example of a UPS module according to the second embodiment of the present invention in which the power supply control module supplied with power from the commercial power supply 511 and the power supply control module supplied with power from the battery 521 are integrated in this way.

[0108] Hereinafter, with reference to FIG. 6, the UPS module according to the second embodiment of the present invention will be described. The UPS module according to the second embodiment includes a power-side power conversion unit having an integrated module 600 supplied with power from a commercial power supply 601 and a battery 602, and a standby module 630 supplied with power from a standby power supply 531, and a load-side power conversion unit having at least one load 560 and at least one conversion unit 550.

[0109] Here, the output ends of the integrated module 600 and the standby module 630 of the power-side power conversion unit are connected to each other to form one common output end. Further, the load-side power conversion unit is connected to the common output end, converts the direct current supplied through the common output end into a driving power supply, and supplies it to the load.

[0110] Hereinafter, this will be described in detail. First, the integrated module 600 includes a commercial power supply 601, a first AC / DC converter 603 for converting the alternating current input from the commercial power supply 601 into a direct current, and a first circuit breaker 602 for protecting the first AC / DC converter 603 from overcurrent and arc generated from the commercial power supply 601.

[0111] In addition, the integrated module 600 further includes a battery 602, a DC-DC converter 613 for stabilizing the DC current input from the battery 602 or converting it into other DC currents, and a second circuit breaker 612 for protecting the DC-DC converter 613 from overcurrent and arcs generated from the battery 602.

[0112] Furthermore, the output terminals of the first AC-DC converter 603 and the DC-DC converter 613 are connected to each other to form one output terminal. Further, between one output terminal formed by connecting the output terminals of the first AC-DC converter 603 and the DC-DC converter 613 and the common output terminal, an integrated circuit breaker 620 for protecting the internal system including the common output terminal is included.

[0113] Here, the first circuit breaker 602, the second circuit breaker 612, and the integrated circuit breaker 620 are in the closed state as the initial state and maintain the closed state unless abnormal currents such as overcurrent occur.

[0114] On the other hand, the backup module 630 includes a second AC-DC converter 120 for converting the AC current input from the backup power supply 531 into a DC current. Also, a third circuit breaker 532 for protecting the second AC-DC converter 120 from overcurrent and arcs generated from the backup power supply 531 is arranged between the second AC-DC converter 120 and the backup power supply 531.

[0115] Here, the third circuit breaker 532 is in the closed state as the initial state and maintains the closed state unless abnormal currents such as overcurrent occur.

[0116] Also, between the output terminal of the second AC-DC converter 120 and the common output terminal, a switch 130 in which a silicon controlled rectifier element and a circuit breaker are connected in parallel is included. Further, a second control unit 655 for controlling the switch 130 is included.

[0117] Here, the second control unit 655 is the control unit 100 of the uninterruptible power supply device 10 according to the embodiment of the present invention described with reference to FIGS. 1 to 4. In this case, the second AC / DC converter 120, the switch 130, and the second control unit 655 constitute the uninterruptible power supply device 10 according to the embodiment of the present invention described with reference to FIGS. 1 to 4.

[0118] Therefore, the switch 130 is in an open state as the initial state, and maintains an open state (a state in which the circuit connection is interrupted) unless the state is changed by the second control unit 655.

[0119] Hereinafter, the operation process of the UPS module according to the second embodiment of the present invention will be described. First, the first control unit 640 converts the alternating current supplied from the commercial power supply 601 into a direct current via the first AC / DC converter 513, and supplies the converted direct current to the load-side power conversion unit via the common output terminal.

[0120] In this state, when an abnormality occurs in the power system of the commercial power supply 601, the first circuit breaker 602 opens, and the connection between the commercial power supply 601 and the common output terminal is interrupted. Then, a direct current is supplied from the battery 602 of the integrated module 600 to the load-side power conversion unit via the common output terminal.

[0121] On the other hand, when all the batteries 602 are discharged before the commercial power supply 601 is restored, the first control unit 640 transmits a predetermined conduction signal to the second control unit 655. Then, the second control unit 655 controls the switch 130 to conduct the output terminal of the second AC / DC converter 120 and the common output terminal.

[0122] In this case, the third control unit 535 inputs a control signal (for example, a turn-on signal for the silicon controlled rectifier element and a close signal for the circuit breaker) for connecting the circuit to the silicon controlled rectifier element and the circuit breaker connected in parallel as described above to the switch 130. Then, the control signal is input to the silicon controlled rectifier element and the circuit breaker at the same time.

[0123] Then, a silicon controlled rectifier element with a much higher operating speed connects the circuit before the circuit breaker. Thus, primarily, the output terminal of the second AC-DC converter 120 and the common output terminal are conducted through the silicon controlled rectifier element, and the current supplied from the standby power supply 531 through the silicon controlled rectifier element is supplied to the load-side power conversion unit through the common output terminal. Therefore, when the battery 602 is completely discharged, the current of the standby power supply 531 is supplied without interruption.

[0124] On the other hand, the circuit breaker of the switch 130 that has received the control signal connects the circuit later than the silicon controlled rectifier element according to the difference in operating speed. Thus, secondarily, the output terminal of the second AC-DC converter 120 and the common output terminal are conducted through the circuit breaker.

[0125] In this case, the output terminal of the second AC-DC converter 120 and the common output terminal are connected through both a first path via the silicon controlled rectifier element and a second path via the circuit breaker. In this case, the current supplied from the standby power supply 531 is supplied to the load-side power conversion unit through the common output terminal via the first path and the second path.

[0126] On the other hand, when the output terminal of the second AC-DC converter 120 and the common output terminal are connected through the second path, the second control unit 655 inputs a control signal for turning off the silicon controlled rectifier element to the switch 130. Then, the silicon controlled rectifier element is turned off, and as a result, the output terminal of the second AC-DC converter 120 and the common output terminal are connected only through the second path via the circuit breaker. Therefore, the current supplied from the standby power supply 531 through the second path is supplied to the load-side power conversion unit through the common output terminal.

[0127] The present invention described above can be realized by a computer-readable code on a program recording medium. The computer-readable medium includes all kinds of storage devices in which data readable by a computer system is recorded. The computer-readable medium includes HDD (Hard Disk Drive), SSD (Solid State Disk), SDD (Silicon Disk Drive), ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc., and also includes those realized in the form of a carrier wave (for example, transmission via the Internet). Further, the computer may include one or more control units of the control unit 100 of the uninterruptible power supply control device or each power supply control module of the UPS module. Therefore, the detailed description above should not be construed restrictively in any way and should be considered as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the claims, and all changes within the equivalent scope of the present invention are included in the present invention.

Claims

One semiconductor rectifying element connected to either the positive or negative terminal of an AC / DC converter, An AC / DC converter (Converter) that converts an alternating current supplied from a predetermined AC power source into a direct current, A bypass circuit that connects the input terminal and the output terminal of the semiconductor rectifying element so as to bypass the semiconductor rectifying element, A circuit breaker that opens or closes the bypass circuit, When receiving a predetermined conduction signal, controls the semiconductor rectifying element so that current conducts, and controls the circuit breaker so that the bypass circuit is closed. When the bypass circuit is closed by the circuit breaker, controls the semiconductor rectifying element so that conduction of the current is interrupted. A control unit, Including, The control unit supplies current from both the bypass circuit and the circuit through the semiconductor rectifying element, The control unit determines whether the bypass circuit is closed based on the voltage change of the circuit of the current supplied through the semiconductor rectifying element, and based on the determination, controls the semiconductor rectifying element to stop conduction of the current through the semiconductor rectifying element. An uninterruptible power supply control device characterized by this.

2. The semiconductor rectifying element is, A silicon controlled rectifier (thyristor). The uninterruptible power supply control device according to claim 1, characterized by this.

3. The control unit is, Simultaneously controls the semiconductor rectifying element and the circuit breaker according to the conduction signal. When current conducts first through the semiconductor rectifying element due to the operating speed difference between the semiconductor rectifying element and the circuit breaker, detects whether the bypass circuit is closed, and controls the semiconductor rectifying element so that conduction of the current is interrupted according to the detection result. The uninterruptible power supply control device according to claim 1, characterized by this.

4. A second semiconductor rectifying element connected to an extreme different from the extreme of the output terminal of the AC / DC converter to which the semiconductor rectifying element and the bypass circuit of claim 1 are connected, A second bypass circuit that connects the input terminal and the output terminal of the second semiconductor rectifying element so as to bypass the second semiconductor rectifying element, Further includes a second circuit breaker that opens or closes the second bypass circuit and is controlled by the control unit, The control unit is, When receiving the conduction signal, controlling the second semiconductor rectifying element so that current conducts, and controlling the second circuit breaker so that the second bypass circuit is closed; when the second bypass circuit is closed by the second circuit breaker, further controlling the second semiconductor rectifying element so that conduction of the current is interrupted. The uninterruptible power supply control device according to claim 1, characterized by the above.

5. The semiconductor rectifying element and the second semiconductor rectifying element are arranged such that the forward current direction coincides with the current direction at the output end of the AC / DC converter, and are arranged in different directions depending on the polarity of the DC power supply to which they are connected. The uninterruptible power supply control device according to claim 4, characterized by the above.

6. An AC / DC converter (Converter) that converts an alternating current supplied from a predetermined AC power supply into a direct current, First and second semiconductor rectifying elements respectively connected to the positive and negative electrodes at the output end of the AC / DC converter, First and second bypass circuits that connect the input ends and output ends of the first and second semiconductor rectifying elements respectively so as to bypass the first and second semiconductor rectifying elements, First and second circuit breakers that open or close the first and second bypass circuits, When receiving a predetermined conduction signal, controlling the first and second circuit breakers so that current conducts through a second path passing through the first and second bypass circuits, Controlling the first and second semiconductor rectifying elements so that current conducts through a first path passing through the first and second semiconductor rectifying elements, Detecting a voltage change in the first path or a voltage change in the second path, Based on the detected voltage change, determining whether the second path is closed by controlling the first and second circuit breakers, When it is confirmed that the second path is closed according to the result of the determination, a control unit that turns off the first and second semiconductor rectifying elements so that current does not conduct through the first path, An uninterruptible power supply control device characterized by including the above.

7. The first and second semiconductor rectifying elements are Each a silicon controlled rectifier. The uninterruptible power supply control device according to claim 6, characterized by the above.

8. The control unit is When receiving the conduction signal, turning on the first and second semiconductor rectifying elements so that current conducts, and controlling the first and second circuit breakers so that the first and second bypass circuits are closed, According to the operating speed difference between the first and second semiconductor rectifying elements and the first and second circuit breakers, current first conducts through the first and second semiconductor rectifying elements, and when the first and second bypass circuits are closed while current is conducting through the first and second semiconductor rectifying elements, the first and second semiconductor rectifying elements are turned off. The uninterruptible power supply control device according to claim 7, characterized in that.

9. Before the first and second bypass circuits are closed, when current conducts through the first and second semiconductor rectifying elements, current at the positive and negative electrodes of the AC / DC converter output terminal is output through the first path. When the first and second bypass circuits are closed while current is conducting through the first and second semiconductor rectifying elements, current at the positive and negative electrodes of the AC / DC converter output terminal is output through both the first path and the second path. When the first and second semiconductor rectifying elements are turned off while the first and second bypass circuits are closed, current at the positive and negative electrodes of the AC / DC converter output terminal is output only through the second path. The uninterruptible power supply control device according to claim 8, characterized in that.

10. The AC / DC converter includes a rectifier element bridge having a plurality of rectifying elements. The rectifying element is a diode or a silicon controlled rectifier. The uninterruptible power supply control device according to claim 6, characterized in that.

11. The predetermined AC power supply is an emergency power supply that supplies power to the load through a path different from the commercial power supply. The predetermined conduction signal is a signal for controlling the control unit so that current supplied from the emergency power supply is output, and is received from another power supply control device connected to the commercial power supply. The uninterruptible power supply control device according to claim 6, characterized in that.

12. A first power supply control module having a first AC / DC converter that converts and outputs an alternating current supplied from a commercial power supply into a direct current; A second power supply control module having a DC / DC converter that stabilizes a direct current supplied from a battery or converts another voltage into a direct current and outputs it; A third power supply control module having a second AC / DC converter that converts and outputs an alternating current supplied from an emergency power supply into a direct current; The output ends of the first to third power supply control modules are connected to each other to form a common output end that supplies a direct current output from any one of the first to third power supply control modules to a load. The third power supply control module a first and a second semiconductor rectifying element that connect between the positive and negative electrodes of the output end of the second AC / DC converter and the positive and negative output ends of the third power supply control module respectively; a first and a second bypass circuit that connect the input end and the output end of each semiconductor rectifying element so as to bypass the first and second semiconductor rectifying elements respectively; a first and a second circuit breaker that open or close the first and second bypass circuits; when receiving a predetermined conduction signal, turn on the first and second semiconductor rectifying elements so that current conducts, and control the first and second circuit breakers so that the first and second bypass circuits are closed; detect a voltage change in a circuit where current is supplied via the first semiconductor rectifying element and the second semiconductor rectifying element; a switch control unit that turns off the first semiconductor rectifying element and the second semiconductor rectifying element when it is confirmed that the first and second bypass circuits are closed according to the reduced voltage of the circuit where current is supplied via the first semiconductor rectifying element and the second semiconductor rectifying element. The UPS module includes.

13. The conduction signal is received from the first control unit of the first power supply control module, The first control unit The UPS module according to claim 12, wherein when both the power supply from the commercial power supply and the power supply from the battery are interrupted, the predetermined conduction signal is transmitted to the switch control unit.

14. The first and second circuit breakers in an initial (default) state where the first and second bypass circuits are open, close the first and second bypass circuits under the control of the switch control unit; The first and second semiconductor rectifying elements The UPS module according to claim 12, wherein in an initial state where they are turned off, they are turned on under the control of the switch control unit.

15. Each of the first and second power supply control modules is provided with a plurality of circuit breakers, The plurality of circuit breakers The UPS module according to claim 12, wherein when an overcurrent flows from the commercial power supply or the battery in an initial state formed to connect between the commercial power supply and the common output terminal or between the battery and the common output terminal, the connection between the commercial power supply and the common output terminal or between the battery and the common output terminal is cut off.

16. A first AC / DC converter connected to a commercial power supply and a battery, converting an alternating current supplied from the commercial power supply into a direct current, and a DC / DC converter for stabilizing a direct current supplied from the battery or converting a direct current of another voltage into a direct current. A first module that outputs either a current supplied from the commercial power supply or a current supplied from the battery through a first output terminal formed by connecting the output of the first AC / DC converter and the output of the DC / DC converter to each other, A second module having a second AC / DC converter that converts an alternating current supplied from a backup power supply into a direct current and outputs it. A UPS module including a second output terminal formed by connecting the first output terminal and the output terminal of the second module to each other, and supplying a direct current output from either the first module or the second module to a load. The second module included in the UPS module is First and second semiconductor rectifying elements connecting between the positive and negative electrodes of the output terminal of the second AC / DC converter and the positive and negative output terminals of the second module respectively, first and second bypass circuits connecting the input and output terminals of each semiconductor rectifying element so as to bypass the first and second semiconductor rectifying elements respectively, and first and second circuit breakers controlling the open or closed state of the first and second bypass circuits. A switch including When receiving a predetermined conduction signal, turns on the first and second semiconductor rectifying elements so that current conducts, controls the first and second circuit breakers so that the first and second bypass circuits are closed, and when current flows through both the first and second semiconductor rectifying elements and the first and second bypass circuits, a switch control unit that turns off the first and second semiconductor rectifying elements. Comprising The switch control unit of the second module is Whether the first and second bypass circuits are closed is determined based on the voltage drop of the circuit passing through the first semiconductor rectifying element and the second semiconductor rectifying element, and based on the determination, the first semiconductor rectifying element and the second semiconductor rectifying element are turned off. A UPS module characterized by this.

17. The first module is controlled by a first control unit, The first control unit is The UPS module according to claim 16, wherein when both the power supply from the commercial power supply and the power supply from the battery are interrupted, the predetermined conduction signal is transmitted to the switch control unit.

Images