KR200423705Y1 - Uninterruptible Switching Apparatus - Google Patents

Abstract

The present invention relates to a non-disruptive switching device, and more particularly, a loop is formed between at least two power lines connected to an electrically driven load to completely separate each power line to prevent leakage current. When the power is cut off from the power supply line for supplying power It relates to a non-disruptive switching device that is switched to the other line so that the load is not stopped by the power failure.

According to the first embodiment of the present invention, the non-disruptive switching device of the present invention includes at least two switching elements for transmitting power output from at least two power lines for transmitting power supplied from different transmission sides to the load side. In the non-simple switching machine, each switching element is connected to each of the power supply line at its input terminal, characterized in that connected to the load at its output terminal.

Stepless changer, SCR, silicon rectifier controller

Description

Uninterruptible Switching Apparatus}

1 is an explanatory diagram showing a conventional stepless stepless changer,

2 is an explanatory diagram showing the concept of an abrupt changer according to the present invention;

3 is a block diagram showing a cutless cutting machine according to the present invention.

* Description of the symbols for the main parts of the drawings *

10: non-splitting machine 11: the first switching driver

12: switching element 13: transfer switching unit

14: second switching driver 15: output detection unit

20: load 111: first control unit

112: first driving power supply unit 113: first gate driving unit

121: first switching element 122: second switching element

123: third switching element 124: fourth switching element

141: second control unit 142: second driving power supply unit

143: second gate driver

The present invention relates to a non-disruptive switching device, and more particularly, a loop is formed between at least two power lines connected to an electrically driven load to completely separate each power line to prevent leakage current. When the power is cut off from the power supply line for supplying power It relates to a non-disruptive switching device that is switched to the other line so that the load is not stopped by the power failure.

In general, an uninterruptible power supply such as a UPS is essential when a hospital, a computer room, or other important equipment that is driven for a long time needs to be driven continuously for a predetermined time.

Such an uninterruptible power supply is connected to at least two external power lines, and when one of the power lines is cut off, the power line of the corresponding equipment is switched to the other power line. A sieve is performed, as shown in FIG. 1 below.

1 is a block diagram for explaining a concept of a conventional uninterruptible breaker.

Referring to FIG. 1, a conventional uninterruptible breaker is a load 2 that is electrically driven, first and second power lines A and B for supplying power applied from the outside, and the first and second. When the power is cut off from one of the power lines (A, B), the switchless to the other line to supply power to the load (2) without power failure, and the first and second power supply It includes a cyclic current sensor (3) for detecting an abnormal current in the line (A, B).

Here, the first and second power lines (A, B) is a separate line and transfers a voltage of usually 220 ~ 1000V or less, which is changed according to the capacity of the load (2), as shown in the figure Is a single-phase two-wire system, using the same, describes a conventional pure cutting machine.

The load 2 is driven by a power source connected to any one of the first and second power lines A and B through the non-switching machine 1 and applied to, for example, a medical device or a server for a hospital. This includes network equipment or communication equipment.

The uninterruptible switching device is connected to the first and second power lines A and B, respectively, and connects the first power line through an internal circuit (an internal circuit including a control configuration of the switching element, not shown). In order to connect any one of A) and the second power line (B) to the load 20, in order to transfer to the load (2) in the first and second power lines (A, B), SCR and The same switching element is included.

The switching element 11 is connected to each power line and selectively turned on under the control of an internal circuit to transfer power applied from the first and second power lines A and B to the load 2.

The circulating current sensor 3 detects the input power of the load 2, detects a power interruption due to a short circuit of the power line, or an abnormal current in which a high level current flows instantaneously and outputs it to a controller included in the internal circuit. .

The working relationship of the conventional cutless cutting machine including the above configuration is as follows.

In the first power line A and the second power line B, the anode line is connected to the switching element 11, the cathode line N is connected to the load 2, respectively, and the switching element 11 is The first and second power lines A and B and the load 2 are respectively connected. At this time, the circulating current sensor 3 detects the output power of the first power line A.

In addition, in FIG. 1, all of the first and second power lines A and B are connected to one switching element 11, but each power line A and B is connected to the switching element 11. It is shown for symbolically expressing the transfer of power to the load (2) through, in practice, one switching element (first switching element) is the anode line (H) of the first power line (A), another One switching element (second switching element) is connected to the anode line H of the second power line B. That is, different switching elements are connected to the anode lines H for each of the power lines A and B so that the power applied through each of the power lines A and B is turned on under the control of the internal circuit to load 2 Power).

In more detail, the switching element 11 is connected to the power line selection (A, B), respectively, but is turned on under the control of the control configuration included in the internal circuit, for example, the first power line (A) ) Is connected to the first switching element 121 and the second switching element is connected to the second power line (B), the internal circuit is either one of the first or second switching element (for example, The first switching device) is turned on. Therefore, the first switching device is turned on in response to the control signal of the internal circuit and periodically turns on and off for a predetermined time to output the AC power applied from the first power line A to the load 2.

Here, the circulating current detector 3 detects power output from the first power line A and the second power line B, and, for example, power failure or abnormality in the first power line A. When a current is detected, a detection signal is output to the internal circuit.

Therefore, the internal circuit turns off the first switching element, turns on the second switching element connected to the second power line B, and simultaneously with the power failure of the first power line A, the second power line ( The load 2 is connected to B). Accordingly, the load 2 is driven by being continuously powered as the second switching device is driven even though power is not applied from the first power line A. FIG.

In addition, the circulating current sensor 3 detects the occurrence of an abnormal situation in which a high level current flows instantaneously by an earth leakage lamp in addition to a power failure situation such as short circuits of the first and second power lines A and B. Outputs a detection signal to the internal circuit, and switches the power supply line connected to the load 2 by switching the first switching element and the second switching element as described above.

However, such a conventional non-switched breaker, as shown in the drawing, because the cathode line (N) is commonly connected to the load (2) in the first and second power supply lines (A, B). The first and second power lines A and B are electrically connected to each other through the loop LOOP. Therefore, in order to protect the load 2 from abnormal currents caused by energization between both power lines A and B, a conventional non-switched circuit breaker temporarily cuts the loop or stops the load 2 when the abnormal current is generated. In order to switch the power line by detecting this when the power supply to the power supply is cut off, the circulating current sensor (3) must be additionally provided in addition to the non-disruptive cutting machine. There is a problem that the cost is increased.

In addition, the conventional non-switched breaker is a minute leakage current flows through the loop formed between the first and second power supply lines (A, B) and the load (2), so that despite the increase in manufacturing cost as described above In addition, a circulating current sensor 3 connected to the first and second power lines A and B, respectively, for detecting an abnormal current or a circulating current between both power lines A and B, was added. However, in the conventional non-switched circuit breaker, the circulating current sensor 3 recognizes this as a normal state because a small leakage current is normally applied by the formed loop, thereby ignoring the leakage current as described above. Accordingly, if the circulating current sensor 3 determines that the circulating current is in a normal state, if an abnormal current is generated in the first and second power lines A and B due to a short circuit or other failure, the circulating current sensor 3 is circulated through the loop. In other words, the error detection signal may not be output at a proper time due to a mistake in the normal state, which may cause a failure or a power failure of the load.

The present invention is conceived to solve the conventional problems as described above, an object of the present invention is to form a loop between the power line via the load by completely separating each power line and the load in the uninterruptible switch between the power line and the load. It is an object of the present invention to provide an indisruptive cutting machine which can be prevented and thus damage to the load due to circulating current can be prevented.

In addition, another object of the present invention is to install a different switching device for each of the power line between the power line and the load, and selectively turns on the switching element when abnormal power is detected in the output power between the power line and the input power of the load. Therefore, since the power line connected to the load is alternated to provide an unceasing changer that continues to operate without the load being interrupted.

In addition, another object of the present invention is to eliminate the circulating current between the two sides so as not to generate a circulating current between the two sides completely without the mutual energization between the power supply line, so as to eliminate the device that can detect the circulating current as in the conventional manufacturing cost It is to provide a non-disruptive cutting machine that can be reduced.

In order to achieve the above object, the present invention includes the following examples.

According to the first embodiment of the present invention, the non-disruptive switching device of the present invention includes at least two switching elements for transmitting power output from at least two power lines for transmitting power supplied from different transmission sides to the load side. In the non-switched switching machine, each switching element is connected to each of the power supply line at its input terminal, characterized in that connected to the load at its output terminal.

According to the second embodiment of the present invention, in the first embodiment, the non-switched transfer device of the present invention is characterized in that the output terminals of the respective switching elements are electrically connected with the same polarity to each other.

According to a third embodiment of the present invention, an indisruptive transfer device of the present invention, in the second embodiment, an output sensing unit for sensing the power output through the output terminal of the switching element; A switching switching unit outputting a control signal to switch a power line for outputting power supplied to the load to another power line according to the abnormal detection signal of the output detecting unit; And a switching driver for selectively driving the switching elements connected to the anode line H and the cathode line N, respectively, in each power line according to the control signal of the transfer switching unit.

According to a fourth embodiment of the present invention, an indisruptive breaker of the present invention, in the third embodiment, the switching driver comprises: a gate driver for turning on the switching element; A driving power supply unit applying power to the gate driving unit; And a control unit controlling the driving power supply unit when the transfer signal of the transfer switching unit is received.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the non-cutting machine according to the present invention will be described in detail.

Figure 2 is an explanatory view showing the concept of a non-cutting machine according to the present invention.

Referring to FIG. 2, an uninterruptible circuit including an uninterruptible switching device 10 according to the present invention includes first and second power lines A and B, an electrically driven load 20, and the first and second parts. 2 includes an uninterruptible switch 10 that switches between the power supply lines A and B and the load 20 in the event of an abnormal power supply to drive the load 20 uninterrupted.

The first and second power lines A and B and the load 20 are described as an example in the case of a single-phase two-wire type, which is the same as in the prior art and the description thereof is omitted.

The switching element 12 is provided with different switching elements for each power line (A, B), respectively, in FIG. 2 to simplify the symbolic representation that the power is transferred through the switching element between each power line and the load The circuit configuration is shown in FIG. 3 below. Therefore, the switching device will be described in detail with reference to FIG. 2, and the detailed operation and circuit description thereof will be described later with reference to FIG. 3.

The switching element 12 is connected to an anode line H and a cathode line N to which positive power is applied from the first and second power lines A and B, respectively, at an input terminal, and the load 20 at an output terminal. Are connected to the positive power supply terminal (+) and the negative power supply terminal (-), respectively. Thus, when the switching device 12 is turned off, the electrical connection between the first and second power lines A and B and the load 20 is completely blocked, and the switching device 12 is connected when the switching device 12 is turned on. The first and second power lines A and B are energized with the load 20.

In addition, the switching device 12 is a switching device that is connected to the first power line (A) when an abnormality of the power line (for example, the first power line (A)) for supplying power to the load 20 (121, 122, see FIG. 3) is turned off, the switching element (123, 124, see FIG. 3) connected to the other power line (for example, the second power line (B)) is turned on the load (20) ) Is switched to the second power line (B) so that the load 20 can continue to be driven even if a power failure lamp is generated.

Therefore, the present invention connects the switching element 12 to each of the anode line H and the cathode line N of the first and second power lines A and B, and the load 20 is connected to the switching element 12. Since power is supplied from different power lines A and B according to the on and off of the circuit, the first and second power lines A and B are not electrically connected and are completely disconnected so that a circulating current is generated between both power lines. Unlike the conventional method, there is no need for a configuration for detecting a circulating current.

According to the present invention as described above, the detailed configuration of the cutless cutting machine 10 is as shown in FIG. 3 is a block diagram showing a cutless cutting machine 10 according to the present invention.

Referring to FIG. 3, the seamless cutting machine 10 according to the present invention includes first and second switching elements 121 and 122 for outputting power input from the first power line A to the load 20. And a third switching driver 11 for turning on the first and second switching elements 121 and 122, and a third power for outputting power input from the second power line B to the load 20. Of the fourth switching elements 123 and 124, the second switching driver 14 and the first to fourth switching elements 121 to 124 to drive control the third and fourth switching elements 123 and 124. An output sensing unit 15 for detecting an abnormal signal from an output power source and controlling the first and second switching drivers 11 and 14 and the first switching driver according to an abnormal signal of the output sensing unit 15. 11 and the switching unit (1) for selectively switching the power line (A, B) for outputting the power applied to the load 20 by selectively controlling the second switching driver (14) Include 3).

Here, the first switching driver 11 turns on the first control unit 111 for controlling the energization of the power applied from the first power line A, and the first and second switching elements 121 and 122. The first gate driver 113 and the first driving power supply 112 for driving the first gate driver 113 under the control of the first controller 111 are included.

Of these, the first control unit 111 is connected to the output terminal of the first power line (A), the first driving power supply unit 112 and the transfer switching unit 13, respectively, the transfer switching unit 13 The first driving power supply 112 is controlled according to the control of the control unit.

The first driving power supply 112 is connected to the first control unit 111 and the first gate driving unit 113, respectively, and the first gate driving unit 113 is controlled by the first control unit 111. Turn on.

The first gate driver 113 is connected to the gates of the first driving power supply 112 and the first and second switching elements 121 and 122, respectively, and the power is supplied from the first driving power supply 112. When this is applied, the first and second switching elements 121 and 122 are turned on to be driven while adjusting the switching time to be turned on and off periodically.

The second switching driver 14 turns on the third and fourth switching elements 123 and 124 under the control of the transfer switching unit 13 to supply the power output from the second power line B. The second control unit 141 for controlling the energization of the power output from the second power line (B) and the third and fourth switching elements (123, 124) to output to the load 20 for this purpose It includes a second gate driver 143 to turn on and a second driving power supply 142 for supplying driving power to the second gate driver 143.

The second control unit 141 is connected to the second power line (B), the second drive power supply unit 142 and the transfer switching unit 13, respectively, the control of the transfer switching unit 13 The second driving power supply unit 142 is turned on according to the signal.

The second driving power supply unit 142 is connected to the second control unit 141 and the second gate driving unit 143, respectively, and the second gate driving unit 143 is controlled by the second control unit 141. A predetermined power supply is applied to turn on.

The second gate driver 143 is connected to the gates of the second driving power supply 142 and the third and fourth switching devices 123 and 124, respectively, to supply power from the second driving power supply 142. When the power is applied, power is applied to the gates of the third and fourth switching devices 123 and 124 so as to be periodically switched on and off.

In the first to fourth switching elements 121 to 124, the first switching element 121 is connected to an anode line H of the first power line A at an input terminal and an anode of the load 20 at an output terminal. It is connected to the power stage. The second switching device 122 has an input terminal connected to the cathode line N of the first power line A and a cathode power terminal of the load 20 connected to the output terminal. In addition, the first and second switching devices 121 and 122 have a gate connected to the first gate driver 113 in common, and when the power is applied, AC power is applied from the first power line A. Is output to the load 20.

In addition, the third switching device 123 is connected to the anode line (H) of the second power line (B) at the input terminal, the anode power terminal of the load 20 is connected to the output terminal. The fourth switching device 124 is connected to the cathode line N of the second power line B at an input terminal, and the cathode power terminal (-) of the load 20 is connected to an output terminal. In addition, the third and fourth switching devices are turned on when power is applied from the second gate driver 143 which is commonly connected to the respective gates, and outputs power to the load 20.

Here, the first to fourth switching elements 121 to 124 are pairs of silicon controlled rectifiers SCRs connected in parallel, respectively, and are connected to each of the anode line H and the cathode line N of each power line. This is because the contact time between each input line and the output side connected to the power line side and the load side must be very fast for the uninterruptible driving of the load 20 to be connected to each other contact point element (eg For example, since the silicon controlled rectifier (SCR) is driven in a solid state as compared to the relay), the power supply can be continuously supplied to the load 20 without disconnection, and thus, the anode line H or the cathode line N Each pair of silicon rectifier controller is provided in parallel in consideration of this, because the power delivered to the load side through the power line has a bidirectional as an AC power source. This is an embodiment of the present invention, and in addition to the characteristics of the non-contact drive as described above according to the application of the designer, and other switching elements if the endurance to the commercial power supply, such as home or other factory equipment It is possible.

In addition, the output sensing unit 15 is connected to an output terminal of the first to fourth switching elements 121 to 124, that is, a power line connected to the positive (+) and the negative power supply terminals (−) of the load 20. Connected to the output power of the switching element 12, a power failure or an electric leakage lamp detects the abnormal power and outputs a detection signal to the transfer switching unit (13).

The transfer switching unit 13 is connected to the output sensing unit 15, the first and second gate driving units 113 and 143, and the first and second control units 111 and 141, respectively. The power lines A and B of power supplied to the load 20 are switched by selectively controlling the first and second controllers 111 and 141 according to the detection signal of the output detector 15.

Hereinafter, a description of the operation of the cutless cutting machine according to the present invention including the configuration as described above.

First, the first control unit 111 transmits an ON signal to the first driving power supply unit 112 under the control of the transfer switching unit 13. Therefore, when the driving signal is received from the first driving power supply 112, the first gate driving unit 113 turns on the gates of the first and second switching elements 121 and 122.

Accordingly, the first and second switching elements 121 and 122 output the AC power applied from the first power line A to the load 20. In this case, the first switching element 121 is connected to the anode line H of the first power line A, and the second switching element 122 is connected to the cathode line N of the first power line A. The power output from the first power line is transferred to the load 20.

At this time, the output sensing unit 15 is the output power of the first and second switching elements 121 and 122, and the circulating current sensor 3 is the output voltage of the first and second power lines (A, B) And input power of the load 20 to detect abnormal power.

Therefore, due to a short circuit of the first power line A itself or a breakdown or other abnormal condition in the transformer or the like, the power applied from the first power line A is shorted or exceeded the rated current or less than an overcurrent or rated value. When it is detected that the power is output to the load 20 side, the output detection unit 15 detects it and outputs an abnormal detection signal to the transfer switching unit 13.

Therefore, the transfer switching unit 13 transmits a power cutoff signal to the first control unit 111 when the abnormal detection signal is received from the output detection unit 15 as described above. Therefore, the first controller 111 turns off the first gate driver 113 in response to outputting an off signal to the first driving power supply 112. Accordingly, the first and second switching elements 121 and 122 are turned off, and the power supply between the first power line A and the load 20 is cut off.

In addition, the transfer switching unit 13 outputs a drive signal to the second control unit 141, the second control unit 141 outputs a drive signal to the second drive power supply unit 142. Therefore, the second gate driver 143 is turned on by the power applied from the second driving power supply 142 to apply power to the gates of the third and fourth switching devices 123 and 124 to provide the third gate driver 143 with the third gate driver 143. And the fourth switching elements 123 and 124 are turned on.

Therefore, the load 20 is cut off as the first power line A is cut off and power applied from the second power line B is applied through the third and fourth switching elements 123 and 124. Even if a power failure occurs, it can continue to drive. As described above, the power line according to the present invention has been described as a single-phase two-wire type, but each switching element 11 for each of at least one anode line (H) and cathode line (N), even if a three-phase four-wire distribution method is applied. In addition, it is possible to block the mutual energization between power lines connected to the stepless switch 10, which corresponds to one application example.

As described above, the non-sequential breaker according to the present invention connects a switching element to each of the anode line (H) and the cathode line of each power line, connects a load through the switching element, and controls the switching element on and off of the power line to be connected. Since switching and disconnection can be performed, there is an effect that a circulating current is not generated by energizing between power lines as in the prior art.

In addition, the present invention can completely separate each power line as described above, so that the circulating current is not generated by the energization between each power line, the purchase cost of the parts, as there is no additional configuration for detecting the circulating current as in the prior art And since the working time is reduced, there is an effect of saving the manufacturing cost.

Claims (4)

In the non-switched switching device including at least two switching elements for transmitting the power output from at least two power lines to the load side to deliver the power supplied from different transmitting side, each switching element is And an input terminal connected to each of the power lines, and an output terminal connected to the load. 2. The apparatus of claim 1, wherein the output terminals of the respective switching elements are electrically connected to the same polarity. The method of claim 2, wherein the break-free cutting machine An output sensing unit sensing power output through an output terminal of the switching element; A switching switching unit for outputting a control signal to switch a power line for outputting power supplied to the load to another power line according to the abnormal detection signal of the output detecting unit; And a switching driver configured to selectively drive the switching element connected to any one of the anode line (H) and the cathode line (N) in each power line according to the control signal of the switching unit. The method of claim 3, wherein the switching driver A gate driver for turning on the switching element; A driving power supply unit applying power to the gate driving unit; And a control unit for controlling the driving power supply unit when the transfer signal of the transfer switching unit is received.

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