KR101201369B1 - Power control apparatus - Google Patents

Abstract

PURPOSE: A power control device is provided to save electricity by always supplying power to a load and blocking off power when an abnormal state occurs. CONSTITUTION: A perpetual calendar storage unit(230) stores calendar data and time data for operating a load(L). A latch unit(240) latches data outputted from a controller to output an address signal. An interface unit(250) transmits the data, an intrinsic number, the calendar data, and time data to an external device. A buffer(260) buffers the address signal of the latch unit to provide the same to the external device. The buffer buffers a control signal outputted from the controller to output the same.

Description

Power control apparatus

The present invention relates to a power supply control device for supplying AC power to a load, such as a street light, and more particularly, by detecting and comparing the voltage input to the current coil and the output voltage to generate a corresponding trigger signal by the magnetic flux chain bridge By changing the voltage of the current coil, the voltage supplied to the load is automatically boosted or stepped down so that the preset voltage is output constantly.In addition, when the abnormal state such as a short circuit occurs, the power is cut off or after a certain time The present invention relates to a power supply control device capable of causing this re-entry.

In general, in the transmission of electricity, the voltage applied to the load of the consumer is generally maintained higher than the rated voltage by supplying the voltage higher than the prescribed voltage in consideration of the voltage drop caused by the line constant of the transmission and distribution system.

However, even though the voltage is higher than the rated voltage to the customer as described above, in a crowded district or industrial area where the electricity consumption is high, a relatively large amount of electricity is consumed during the daytime, so that the voltage applied to the load of the customer is The voltage is kept below the rated voltage, and at night time, a small amount of electricity is consumed, so that the voltage applied to the load of the consumer is kept higher than the rated voltage.

In addition, a load that uses electricity as power or lighting, such as an electric motor, a discharge lamp, or a fluorescent lamp, requires a relatively high voltage in the initial operation so as to maximize the efficiency, and in a subsequent operation within a load efficiency range or an input voltage range. In order to use power efficiently by controlling voltage, the high voltage or low voltage is inputted during the initial operation.

Accordingly, in order to solve the above problems, a power supply control apparatus has been disclosed. The conventional power supply control apparatus generates a plurality of trigger signals according to input voltages of a current coil for controlling a current supplied to a load, thereby generating the current coil. It is configured to control the voltage supplied to the load by supplying to the gate of the plurality of triacs for switching the number of windings of the winding coupled magnetic flux bridge coil to demagnetize the magnetic flux of.

However, since the power supply control device as described above controls the voltage supplied to the load by using the voltage supplied to the current coil, a phase difference between the output voltage of the current coil and the input voltage occurs, and thus the number of turns of the magnetic flux linkage coil. There is a problem in that the triac, such as a device for switching the breakage or overvoltage is supplied to the load.

In addition, since NFB (No Fuse Breaker) is used to cut off the over-current for electricity overload and short circuit, it is impossible to set the value of the required current by setting the load arbitrarily, that is, in case of an accident caused by an overload or short circuit, etc. There is a problem that can not be suppressed.

In addition, since the operation for constant voltage maintenance due to load variation, output voltage constant voltage maintenance due to voltage fluctuations on the input side, initial voltage starting due to initial operation characteristics, and constant voltage maintenance according to the set time and set voltage occurs quickly and frequently, In order to adjust the voltage level, the switching element is frequently turned on and off at zero cross in response to the trigger control signal at the moment when the input / output voltage is synchronized. The two elements of the switching means coupled to the regulating flux linkage coil are operated simultaneously, that is, there is a problem in that an element of the switching means is burned out due to an overcurrent caused by a short circuit.

Accordingly, an object of the present invention is to detect and compare the voltage input to the current coil and the output voltage, and then generate the corresponding trigger signal so that the voltage of the current coil is varied by the magnetic flux linkage so that the voltage supplied to the load is automatically boosted or stepped down. Controlled output voltage is kept constant, and the disadvantage of NFB (No Fuse Breaker) where the cutoff current value of overload is fixed. Can be set arbitrarily to set the required current value, and can cut off the power in case of abnormal condition such as overload or short circuit, or turn on the power again after a certain time when returning to normal state. It is to provide a power control device that satisfies the Saving & Safety System.

In addition, an object of the present invention is to detect the synchronization of the voltage input and the output voltage to the current coil to operate the device of the switching means at zero cross to reduce the switching loss, to prevent the burnout of the device, even when the load changes It is to provide a power control device that can enable them.

In addition, it is an object of the present invention to provide a power control device that can protect the life by automatically cutting off the voltage supplied to the load when the preset leakage current is more than a predetermined value or the leakage current is above the rising threshold.

Meanwhile, the object of the present invention is not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

To this end, according to the present invention, the primary side is connected in series to one end of the input power line to be connected to the load and having a predetermined turn ratio for supplying the set input power; A tap transformer connected to the secondary side of the main transformer and having a plurality of magnetic flux linkage taps for correcting a voltage corresponding to the change value based on a change in voltage of an input power source applied through the primary side; Switching means for mutually combining a plurality of magnetic flux linkage taps in response to the voltage change value; A ground fault detector connected to the output line of the ground fault breaker connected to the meter to detect and output a ground fault current; An input voltage detector connected to a primary side of the main transformer to detect an input voltage; An output voltage detector connected to a secondary side of the main transformer to detect an output voltage; An amplifier for amplifying and outputting the signal output from the ground fault detector; An AD converter converting and outputting the signal amplified by the amplifier into a digital signal; A data input unit storing leakage current limit data and rising leakage current data corresponding to the leakage current output from the AD converter; A display and warning sound generator for displaying the leakage current and the input / output voltage and generating a warning sound according to a control signal of a controller; When an over voltage or over current is supplied to the load, or when the system test data is input to the data input part and the system is tested and an error occurs or a leakage current exceeding the limit occurs, the power supplied to the load is controlled according to the control signal of the controller. Blocking line switching unit; A control time data storage unit configured of a memory device storing an operating time of a load; Address storage unit consisting of a memory for storing the unique data of the power control device; A yearly calendar storage unit for storing calendar data corresponding to year, month, and day and time data corresponding to day and time for operation of the load; A latch unit for latching data output from the controller and outputting an address signal; An interface unit for transmitting data corresponding to a result of the system test, a unique number, calendar data, and time data to an external device; A buffer which buffers the address signal of the latch unit to be supplied to an external device or buffers and outputs a control signal output from the controller; And comparing the data corresponding to the leakage current output from the AD converter with the leakage current limit data and the rising leakage current data set and input from the data input unit to output a predetermined control signal, and at the same time, the input voltage detector and the output voltage. Output a plurality of trigger control signals according to the data output from the detection unit so that the rated voltage is always supplied to the load, and at the same time, the overall control of the components in order to operate the operation of the load according to the set time and the operation and And a controller for checking whether there is a failure and outputting data according to the result, wherein the main transformer has a polarity of primary and secondary set in the boosting direction, and a power terminal to be applied from the primary side of the tap transformer is applied to the secondary side. The winding coil voltage value of the secondary terminal is set to the highest voltage of the tap transformer. The tap transformer may be connected to one end of the secondary side of the main transformer to set a reference voltage for providing a reference voltage and center the plurality of positive taps configured in a boosting direction about the reference voltage. The primary side combination is set by forming a plurality of negative tabs configured in the step-down direction, and the secondary side combination is set by forming a plurality of magic tabs configured to be connected to the second end of the main transformer. A plurality of triacs directly connected to each tap of the trans, wherein T1, T2, T3 are directly connected to M3, M2, M1, and T4, T5, T6 are each N1, N2, N3 or P2, P1 The boost CT and the step-down CT are provided with a power control device connected directly between the primary side of the tap transformer and the secondary side of the main transformer, respectively.

Therefore, according to the present invention, after detecting and comparing the voltage input to the current coil and the output voltage, the corresponding trigger signal is generated to change the voltage of the current coil by the magnetic flux linkage so that the voltage supplied to the load is automatically boosted or stepped down. Controlled output voltage is kept constant, and the disadvantage of NFB (No Fuse Breaker) where the cutoff current value of overload is fixed. You can set the current value arbitrarily and set the required current value and satisfy the electric saving and safety system (ESS) that can cut off the power in case of abnormal condition such as overload or short circuit or re-supply the power after a certain time when returning to the normal state. Can be.

In addition, by detecting the synchronization between the voltage input to the current coil and the output voltage to operate the device of the switching means at zero cross to reduce the switching loss, to prevent the burnout of the device and to allow the above operations even when the load changes. have.

In addition, when the preset leakage current exceeds a predetermined value or the leakage current exceeds the rising threshold, it is possible to automatically cut off the voltage supplied to the load to protect human life.

In addition, by supplying a constant power to the load at all times and cuts off the power when an abnormal condition occurs, the power can be controlled to meet the electric saving and safety system (ESS).

On the other hand, the effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a block diagram showing the configuration of a power supply control apparatus according to a preferred embodiment of the present invention;
2 is a circuit diagram showing the configuration of the power supply control device of FIG. 1;
3 is a control flowchart showing the overall operation of the power supply control apparatus according to the preferred embodiment of the present invention;
4 is a control flowchart illustrating an overvoltage detection operation in the power supply control device of FIG. 3;
5 is a control flowchart showing a current detection operation in the power supply control device of FIG.
FIG. 6 is a control flowchart showing voltage step-up and step-down operations in the power supply control device of FIG. 3; FIG.
7 is a control flowchart illustrating output voltage detection and constant voltage holding operations in the power supply control device of FIG. 3; And
8 is a control flowchart illustrating a short circuit detecting operation in the power supply control device of FIG. 3.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing the configuration of a power supply control apparatus according to a preferred embodiment of the present invention, Figure 2 is a circuit diagram showing the configuration of the power supply control device of FIG.

1 and 2, in the power supply control apparatus according to the preferred embodiment of the present invention, the primary side is serially connected to one end (R_IN) of the input power line (N, R_IN) connected to the load (L) A main transformer MT having a predetermined turns ratio for supplying a set input power and a change value based on a voltage change of an input power source connected to a secondary side of the main transformer MT and applied through the primary side A tap transformer TT having a plurality of flux linkage taps for correcting a voltage, a switching means ST for mutually combining a plurality of flux linkage taps in response to the voltage change value, and an earth leakage breaker connected to the meter C An earth leakage detector 110 connected to an output line of a CT to detect and output an electric leakage current, an input voltage detector 120 connected to a primary side of the main transformer MT to detect an input voltage, and the main transformer MT. Connected to the secondary side of the An output voltage detector 130 for detecting voltage, an amplifier 140 for amplifying and outputting the signal output from the ground fault detector 110, and converting and outputting the amplified signal from the amplifier 140 into a digital signal The AD converter 150, the data input unit 160 storing the leakage current limit value data and the rising leakage current data corresponding to the leakage current output from the AD converter 150, and the leakage current and input / output voltage are displayed simultaneously. When the overvoltage or overcurrent is supplied to the display and warning sound generating unit 170, the load L, or the data input unit 160, the system test data is input so that the alarm sound is generated according to the control signal of the controller MC. A line switching unit 180 which cuts off the power supplied to the load L in response to a control signal of the controller MC when an error occurs or a leakage current exceeding a threshold occurs as a result of the test; The control time data storage unit 210 configured as a memory device storing the operating time of the load L, the address storage unit 220 configured as a memory in which the unique data of the power controller is stored, the year for the operation of the load L, A monthly calendar storage unit 230 storing calendar data corresponding to month and day and time data corresponding to day and time, a latch unit 240 for latching data output from the controller MC and outputting an address signal; The interface unit 250 for transmitting the data corresponding to the test result, the unique number, the calendar data and the time data to the external device, and buffer the address signal of the latch unit 240 to be supplied to the external device or the controller ( A buffer 260 for buffering and outputting a control signal output from MC) and data corresponding to the leakage current output from the AD converter 150 and the data input unit 160. Compares the determined leakage current limit value data and the rising leakage current data to output a predetermined control signal, and simultaneously outputs a plurality of trigger control signals according to the data output from the input voltage detector 120 and the output voltage detector 130. Therefore, the rated voltage is always supplied to the load L, and at the same time, in order to operate the operation of the load L according to the set time, the overall control of the components and the operation and failure of the system are checked and the results It includes a controller (MC) for outputting the data according.

In the main transformer MT, a primary side X1, X2 is connected in series to one end R_IN of an input power line N, R_IN connected to a load L, and a predetermined power for supplying a set input power is provided. A transformer having a turns ratio, the polarity of the primary and secondary is set in the boosting direction, the power terminals to be applied from the primary side of the tap transformer TT are set to the secondary side (Y1, Y2), and the secondary side (Y1). Y2) The winding coil voltage value of the terminal is set to the highest voltage value of the tap transformer TT, and the voltage is increased according to the combination of the primary side and the secondary side of the tap transformer TT according to the trigger control signal of the controller MC. Step-down is controlled.

Here, the main transformer MT, the primary side and the secondary side may have a winding ratio of 1 to 14.

The tap transformer TT may be connected to a secondary side of the main transformer MT and may include a plurality of magnetic flux linkage taps for correcting a voltage corresponding to a change value based on a voltage change of an input power applied through the primary side. The branch includes a plurality of positive taps connected to one end Y1 of the main transformer MT to set a reference voltage CT providing a reference voltage and configured in a boosting direction around the reference voltage CT. The primary side combination is set by forming a plurality of negative taps N1, N2, N3 configured in the step-down direction centering on P1, P2 and the reference voltage CT, and the second end of the main transformer MT (Y2). The secondary side combination is set by forming a plurality of magic taps M1, M2, M3 configured to be connected to the < RTI ID = 0.0 >

Herein, the meanings of the boosting and stepping down directions will be described in detail. The secondary side of the main transformer MT is induced by the voltage input from the primary side, and the induced voltage is applied to the CT tap. Here, the voltage applied to the CT tap is set as the reference voltage of the tap transformer TT. On the other hand, the magic tap composed of the secondary side of the tap transformer TT is combined with the positive tap or the negative tap by the switching means ST, and the positive tap and the negative tap mutually determine when the current flows. The voltage in the opposite direction is applied. For example, when a voltage is applied to the magic tap through the positive tap or the positive tap through the magic tap, that is, the voltage applied to the magic tap, that is, from the lower side to the upper side of the drawing, is shown in the primary side of the tap transformer TT. By generating an induced voltage from the upper side to the lower side, the flow of the voltage is set in the counterclockwise direction, and the voltage direction boosts the voltage of the input power applied to the primary side of the main transformer MT.

On the other hand, when the reference voltage CT is applied to the primary side negative of the tap transformer TT, the voltage applied to the negative tap is downward in the drawing, and the voltage direction of the secondary magic tap of the tap transformer TT is shown in the figure. Ie, the voltage flows in a clockwise direction, and this voltage direction steps down the voltage of the input power applied to the primary side of the main transformer MT.

Accordingly, the range of step-up or step-down may be determined based on the position of the CT tap to which the reference voltage CT is applied is connected to the position of the primary terminal of the tap transformer TT based on the above structure.

As described above, the positive tap constituted by the primary side of the tap transformer TT and the magic tap of the secondary side combined with the negative tap are the directions of voltages flowing to the primary and secondary sides of the tap transformer TT according to the combination method. This voltage direction is changed and affects the primary side through the secondary side of the main transformer MT. Therefore, when the voltage direction of the tap transformer TT is determined to be in line with the voltage of the input power applied to the primary side of the main transformer MT, it is called a boosting direction, and the voltage of the input power applied to the primary side of the main transformer MT is determined. When the voltage direction of the tap transformer TT is determined to be inverse with the voltage, this is called the step-down direction.

Therefore, when the voltage of the input power is supplied to the primary side of the main transformer MT, the secondary side of the main transformer MT is induced in a direction opposite to the voltage input to the primary side. In this case, the tap transformer TT When the positive tap on the primary side and the magic tap on the secondary side are combined, the voltage direction of the tap transformer TT is increased in accordance with the direction of the voltage induced to the secondary side of the main transformer MT.

Here, in the main transformer MT, the polarity of the primary and the secondary is set in the boosting direction, and the power terminals to be applied from the primary side of the tap transformer TT are set to the secondary sides Y1 and Y2. The winding coil voltage value of the secondary terminal is set to the highest voltage value of the tap transformer TT. Therefore, the combination of the primary positive tap, the negative tap and the secondary magic tap of the tap transformer TT may be controlled with respect to the boosting and lowering of the controller MC.

The switching means ST is operated to switch a plurality of magnetic flux linkage taps, that is, tap transformers TT, in correspondence with the voltage change value. The switching means ST has a contactless point corresponding to a positive error value during step-up control. The device is controlled by switching (zero cross soft switching), and in the case of step-down, switching (zero cross soft switching) control is performed on the contactless device of the address corresponding to the negative error value. Here, the contactless element is composed of a high power transistor or a triac.

Meanwhile, the magic tap of the tap transformer TT is formed in a series structure in the step-down direction as a multiple of the winding ratio * voltage conversion default value of the main transformer MT. Here, the default value of the voltage conversion is set to 7V as a unit for changing the voltage, it is set to a certain multiple on the basis of this voltage conversion default. And the set voltage is made in the step-down direction, each terminal constituting the magic tap is made in series, for example, the magic tap has a set voltage of M1 = 0V, M2 = 28V, M3 = 56V for each terminal .

The positive tap is formed in a series structure in the boosting direction in multiples of the value of CT tap value + magic tap setting order. That is, the positive tap is determined by the sum of the set terminal value and the CT value among the plurality of terminals of the magic tap, so that the voltage to be boosted is set. For this purpose, the magic tap is determined as a multiple of the voltage change unit (set order) already set. The tapping structure between the taps is boosted in a series structure. For example, the positive taps have a set voltage of P1 = 84V and P2 = 168V for each terminal.

Further, the negative tap is formed in a series structure in the pressing direction in multiples of the value (equivalent value) of the CT tap value-the magic tap setting order. Here, as described above, the set order of the magic tap performs the step-down by subtracting the multiple value of the set value of the magic tap by the CT tap value. For example, the negative tap has N1 = 168 V for each terminal. , N2 = 84V, N3 = 0V.

In detail, the set order value of the magic tap is first described, and each terminal constituting the magic tap is set with a unit voltage for inducing a voltage change to increase or decrease the voltage, and define the unit voltage as the set order value. do. The unit voltage is proportional to the number of windings of the coil wound between each terminal of the magic tab.

The CT tap value is a reference voltage induced to the Y1 terminal of the secondary side by the voltage of the input power supply via the primary side of the main transformer MT, and the controller MC steps down or boosts based on the voltage detected by the CT tap. Determine.

As described above, when the positive taps determined as the high voltage value and the negative taps determined as the low voltage value are connected to the magic taps in a permutation order based on the CT tap among the determined voltage values, the boost is' ( Positive Tap Angle Value + CT Value + Magic Tap Angle Value) / Winding Ratio = Step-up Voltage Conversion ', and Step Down is (Negative Tap Angle Value-CT Value + Magic Tap Angle Value) / Winding Ratio = Step-down Voltage Conversion Sorted by a multiple of the default value.

Accordingly, the controller MC combines a positive tap and a magic tap for such step-up and step-down control. First, a voltage conversion default value and an output corresponding to the input voltage of the input voltage detector 120 and the number of coils of the tap are output. The step-up or step-down control is performed by controlling the switching means ST based on the voltage change value of the output voltage detector 130 by receiving the voltage for setting the voltage. In the case where the current input voltage is 200V, when 24V must be boosted, the P2 and M3 taps must be combined, and the voltage change value is recognized. Combine the N1 and M3 tabs.

In this case, the switching means (ST) is a switching operation to combine a plurality of magnetic flux linkage taps, that is, tap transformers (TT) in response to the voltage change value, and is directly connected to each tap of the tap transformers (TT). And a plurality of triacs (T1-T6, stepped CT, stepped CT), wherein T1, T2 and T3 are directly connected to M3, M2 and M1, respectively, and T4, T5 and T6 are each N1, N2, N3 or Directly connected to P2 and P1, the step-up CT and step-down CT are directly connected between the primary side of the tap transformer TT and the secondary side of the main transformer MT, respectively.

Therefore, the switching means ST, the triac is driven according to the trigger control signal provided from the controller (MC), and at this time, the primary side and the secondary side of the tap transformer TT directly connected to the operated triac In combination, a boost or step is achieved.

On the other hand, the switching means ST is such that the high voltage induced in the tap transformer TT is not supplied to the controller MC through the photosensors respectively operated according to the plurality of trigger control signals output from the controller MC. It is preferable to further include an overcurrent protection unit (not shown) for protecting the corresponding components, a transistor (not shown) to be switched according to the operation of the photosensors, a fuse and a high resistance to protect the triac, The controller MC is connected to one end of the tap transformer TT in which the number of turns varies according to the operation of the triac, and when any one of the plurality of triacs is broken, a voltage higher than a predetermined value induced from the tap transformer TT is controlled. It is preferable to further include a triac damage detection unit (not shown) for supplying to operate the line switching unit 180 described later.

The switching means ST may further include a heat sink (not shown) installed above the printed circuit board to dissipate heat generated from a plurality of triacs mounted in a line on the printed circuit board, and the heat sink. It is desirable to protect the switching element from heat via a heat dissipation blade that extends integrally.

The ground fault detecting unit 110 is connected to an output line of the ground fault breaker CT connected to the meter C to detect and output a ground fault current, and is connected in series to a resistor having a different value at the front end and in a parallel state. It further comprises a leakage current generator (F) consisting of a plurality of switches connected to the front end of the furnace.

The input voltage detector 120 is connected to the primary side of the main transformer MT to detect an input voltage, and is connected to the load L in series to control a voltage supplied to the load L. It is connected to the primary front end of MT) through a small transformer and detects the current and voltage of the used AC power input to the input terminal, amplifies it through the amplifier and then provides it to the controller (MC).

The output voltage detector 130 is connected to the secondary side of the main transformer MT to detect the output voltage. The output voltage detector 130 is connected to the rear end of the primary transformer MT through a small transformer and supplied to the load L. The voltage is detected and amplified by the amplifier and then provided to the controller MC.

The amplifier 140 includes an operational amplifier, a variable resistor, a resistor, and the like so that the signal output from the ground fault detector 110 is amplified, and the AD converter 150 includes an analog / digital converter.

The data input unit 160 is a memory device capable of storing leakage current limit data and rising leakage current data corresponding to the leakage current output from the AD converter 150, and the control time data storage unit 210. ) Is a memory device in which the operation time of the load (L) is stored, the address storage unit 220 is a memory device in which the unique data of the power control device is stored, and the monthly calendar storage unit (230) for the operation of the load (L) It is a memory device that stores calendar data corresponding to year, month, and day and time data corresponding to day and time, and provides each data to the controller MC to generate a control signal for the corresponding control of the controller MC. To be used for computation.

The display and warning sound generator 170 includes a display device such as a buzzer or an LCD that displays the leakage current and the input / output voltage and simultaneously generates a warning sound according to a control signal of the controller MC.

The line switching unit 180 is provided at the rear end of the primary side of the load L and the main transformer MT so that system test data is input to the load L when the overvoltage or overcurrent is supplied to the load L or the data input unit 160. And an electronic switch that cuts off the power supplied to the load L in response to a control signal of the controller MC when an error occurs or a leakage current exceeding a threshold occurs as a result of testing the system.

The latch unit 240 latches data output from the controller MC and outputs an address signal. The latch unit 240 includes a plurality of D-type flip-flops that are latch elements.

The interface unit 250 is an interface for transmitting data, a unique number, calendar data, and time data corresponding to a test result of the system to an external device, and the buffer 260 receives an address signal of the latch unit 240. It is a buffer that is buffered to be supplied to an external device or buffered to output the control signal output from the controller (MC).

The controller MC compares the data corresponding to the leakage current output from the AD converter 150 with the leakage current limit data and the rising leakage current data set by the data input unit 160 to determine a predetermined control signal. And outputs a plurality of trigger control signals according to the data output from the input voltage detector 120 and the output voltage detector 130 so that the rated voltage is always supplied to the load L and at the same time the load L In order to operate the operation according to the set time, the overall control of the components, check the operation and failure of the system and outputs the data according to the result.

In addition, a disadvantage of NFB (No Fuse Breaker) in which the overload breaking current value is fixed, that is, the necessary current value can be set by arbitrarily setting the use load in order to suppress the over current and the use of power more than necessary for overload and short circuit of electricity. .

Hereinafter, the operation of the power supply control apparatus according to the preferred embodiment of the present invention with reference to the drawings will be described.

3 is a control flowchart showing the overall operation of the power supply control apparatus according to the preferred embodiment of the present invention. 4 is a control flowchart showing an overvoltage detection operation in the power supply control apparatus of FIG. 3, FIG. 5 is a control flowchart showing a current detection operation in the power supply control apparatus of FIG. 3, and FIG. 6 is a power supply control of FIG. 3. FIG. 7 is a control flowchart illustrating a voltage step-up and a step-down operation of the apparatus, and FIG. 7 is a control flowchart illustrating an output voltage detection and a constant voltage maintenance operation of the power supply control apparatus of FIG. 3. This is a control flowchart showing a short circuit detection operation.

First, as shown in Figure 3, the overall operation of the power supply control apparatus according to an embodiment of the present invention will be described.

First, in the initialized state (S10), the controller MC controls the input voltage detector 120 to detect an input voltage input from the main transformer MT (S11), and then sets the input voltage to a preset voltage. A comparison with 245 V which is the set voltage of the data input unit 160 is made (S12). If the input voltage is greater than, for example, 245 V, the controller MC controls the line switching unit 180 to block or bypass the input voltage supplied to the load L (S13). This is displayed on the display and warning sound generating unit 170 (S14). Then, the input voltage is compared with the set voltage again (S15). If it is small, go to step S12.

Therefore, through the above process, when the overvoltage is supplied to the load (L), the controller (MC) can protect the load (L) by blocking it in advance.

If, as a result of the determination in S12, for example, the input voltage is less than 245V, the controller MC detects an input current input from the meter C to the main transformer MT (S16). The current is compared with the set current of the data input unit 160 which is a preset current (S17). If the input current is greater than the set current as a result of the determination in S17, the controller MC bypasses the input current supplied to the load L (S18), and displays it on the display and warning sound generating unit 170. (S19) Then, after comparing the input current with the set current again (S20), if it is large, the process proceeds to S18. Otherwise, if the input current is smaller than the set current, the process proceeds to step S12.

Therefore, through the above process, the controller MC can protect the load (L) by blocking it in advance when the overcurrent is supplied to the load (L).

If the input current is less than the set current as a result of the determination in step S17, the controller MC controls the output voltage detector 130 to detect the output voltage output from the main transformer MT (S21). The output voltage is compared with the stabilization voltage of the data input unit 160 which is a preset voltage (S22). In this case, when the output voltage corresponds to the stabilization voltage as a result of the determination in S22, the controller MC outputs the stabilization voltage (S23), otherwise, the stabilization voltage, that is, the primary side of the tap transformer TT is output. And a combination address of the secondary side (S24), and generates a trigger control signal corresponding thereto to operate the corresponding elements of the switching means (ST) to proceed the logic combination to control the step-up or step-down operation to correspond to the corresponding voltage After that (S25), it is then again determined whether the output voltage corresponds to the stabilization voltage (S26). If it is determined in S26 that the output voltage corresponds to the stabilization voltage, the controller MC proceeds to step S22, otherwise, after determining whether there is an error in the operation of the corresponding elements of the switching means ST (S27), In operation S27, if there is an error in the operation of the corresponding device, the output voltage is bypassed (S28), and this is displayed in the display and warning sound generator 170 (S29). If no, the flow proceeds to step S22.

Therefore, through the above process, the controller MC may enable a stable operation of the load L by always supplying a constant voltage to the load (L).

On the other hand, the controller MC determines whether the current use amount is increased after the step S23, that is, whether the number of loads L is increased through the input voltage detector 120 and the output voltage detector 130, or The load L is more current due to a change in operation control time depending on the operating conditions of the load L programmed by the control time data storage 210 or the monthly calendar storage 230, ie, the amount of sunshine or the season. After determining whether to use (S30), otherwise proceeds to S12. Herein, when it is determined in S30 that the current usage is increased, the controller MC compares the output voltage with a starting voltage required for stable operation of the load L of the data input unit 160, which is a preset voltage. (S31). As a result of the determination in S31, when the output voltage corresponds to the start voltage, the controller MC outputs the start voltage (S32), and then determines whether a predetermined set time has elapsed after outputting the start voltage (S33). If the predetermined time has elapsed, the process proceeds to S12, otherwise, the process proceeds to S32. On the other hand, if it is determined in S31 that the output voltage does not correspond to the starting voltage, the controller MC recognizes a combination address of the primary side and the secondary side of the tap transformer TT so that the output voltage corresponds to the starting voltage (S34). In operation S35, a trigger control signal corresponding thereto is generated to operate corresponding elements of the switching means ST to control the step-up or step-down operation to correspond to the corresponding voltage (S35).

Therefore, through the above process, the controller MC is required for the operation of the load (L), even if the current consumption increases due to various operating conditions of the load (L) or increase of the load (L) The constant supply of the load L may be possible at all times.

On the other hand, the controller MC controls the ground fault detecting unit 110 to detect a ground fault current generated in the input power lines N and R_IN connected to the load L (S36), and then sets the ground fault current as a preset current. The comparison is made with the leakage current of the data input unit 160 (S37). For example, when the leakage current is greater than or equal to the threshold leakage current, which is the set current, the controller MC controls the line switching unit 180 to cut off the input voltage supplied to the load L. After (S38), it is displayed on the display and warning sound generation unit 170 (S39). If the leakage current is less than the threshold leakage current that is the set current, the controller MC performs the processes of S10 to S35.

Therefore, through the above process, the controller MC can prevent a short circuit by cutting off the power supplied to the load L when a short circuit current is generated in the input power lines N and R_IN. Here, through the leakage current generator (F) installed in the dundan of the ground fault detecting unit 110 to generate a different leakage current according to the operation of the switch to test whether the power supply automatically cuts the power at the threshold threshold leakage current set Thus, it is possible to check whether there is a failure without using special equipment.

On the other hand, as shown in Figure 4, the overvoltage detection operation of the power supply control apparatus according to an embodiment of the present invention will be described in more detail as follows.

First, in the initialized state (S110), the controller MC controls the input voltage detector 120 to detect the input voltage of the main transformer MT (S111), and converts the input voltage into an AD converter ( After conversion through 150 (S112), the memory is stored in a memory device such as the data input unit 160 (S113). Thereafter, the controller MC compares the input voltage with a predetermined voltage of 245V of the data input unit 160 which is a preset voltage (S113), and if the voltage is not an overvoltage, the power controller continuously operates (S115). Then, the input voltage is displayed on the display and warning sound generating unit 170 (S116). If the result of the determination is an overvoltage, the controller MC controls the line switching unit 180 to cut off the input voltage supplied to the load L (S117), and to the display and warning sound generating unit 170. In operation S118, a warning sound is generated (S119), and the process proceeds to S111.

Here, the S110 to S119 corresponds to the S11 to S15, the controller MC through the above process when the overvoltage is supplied to the load (L) in advance to protect the load (L). have.

Therefore, a disadvantage of NFB (No Fuse Breaker) in which the cutoff current value of the overload is fixed, that is, the necessary current value can be set by arbitrarily setting the use load in order to suppress the overcurrent and the use of power more than necessary for overload and short circuit of electricity.

On the other hand, as shown in Figure 5, the current detection operation of the power supply control apparatus according to a preferred embodiment of the present invention will be described in more detail as follows.

First, the controller MC detects an input current input to the main transformer MT from the input voltage detector 120 and the output voltage detector 130 or the meter C in an initialized state (S210) ( S211), the input current is converted through the AD converter 150 (S212), and then stored in a memory device such as a memory, that is, the data input unit 160 (S213). Subsequently, the controller MC compares the input current with the maximum current (S214). If the input current is greater than the maximum current, the controller MC stores the input current at the maximum current value (S215), and sets the input current and the preset current. It is compared with the set current of the data input unit 160 that is the current (S216). Here, when the comparison determination result in the step S214 the input current has a value less than the maximum current, the controller MC proceeds to S216. When the input current is less than or equal to the set current as a result of the comparison determination in S216, the controller MC causes the power supply control device to continuously operate (S217), and then inputs the input current to the display and warning sound generating unit 170. After displaying (S218), the process proceeds to S211. When the input current is greater than the set current as a result of the comparison in S216, the controller MC controls the line switching unit 180 to bypass the input current supplied to the load L (S219). After displaying this on the display and warning sound generator 170 (S220), the process proceeds to S211.

Here, the S210 to S220 corresponds to the S16 to S20, the controller MC through the above process when the overcurrent is supplied to the load (L) can be blocked in advance to protect the load (L). have.

On the other hand, as shown in Figure 6, the voltage step-up and step-down operation of the power control device according to a preferred embodiment of the present invention will be described in more detail as follows.

First, in the initialized state (S310), the controller MC controls the input voltage detector 120 to detect the input voltage of the main transformer MT (S311), and the input voltage is a preset voltage. It is compared with the set voltage of the data input unit 160 (S312). Here, as a result of the comparison determination in S312, when the input voltage is equal to the set voltage, the controller MC controls the output voltage detector 130 to detect the output voltage output from the main transformer MT (S313). In addition, when the input voltage is smaller than the set voltage, the controller MC recognizes a combination address of the primary side and the secondary side of the tap transformer TT so as to increase the voltage corresponding to the set voltage (S314). After generating the trigger control signal to operate the corresponding elements of the switching means (ST) to proceed the logic combination to control the step-up operation to correspond to the corresponding voltage (S315), and then proceeds to S313. In addition, when the input voltage is larger than the set voltage, the controller MC recognizes a combination address of the primary side and the secondary side of the tap transformer TT so as to perform a step-down corresponding to the set voltage (S315). After generating the trigger control signal to operate the corresponding elements of the switching means (ST) to proceed the logic combination to control the step-down operation to correspond to the corresponding voltage (S317), and proceeds to S313. On the other hand, the controller MC compares the output voltage with the set voltage of the data input unit 160 which is a preset voltage after the step S313 (S318). Here, as a result of the comparison determination in S318, when the output voltage is equal to the set voltage, the controller MC controls the output voltage detector 130 to detect the output voltage output from the main transformer MT (S319). In addition, when the output voltage is smaller than the set voltage, the controller MC recognizes a combination address of the primary side and the secondary side of the tap transformer TT so as to increase the voltage corresponding to the set voltage (S320). After generating the trigger control signal to operate the corresponding elements of the switching means (ST) to proceed the logic combination to control the step-up operation to correspond to the voltage (S321), and proceeds to S313. In addition, when the output voltage is greater than the set voltage, the controller MC recognizes a combination address of the primary side and the secondary side of the tap transformer TT so as to perform a step-down corresponding to the set voltage (S322). After generating the trigger control signal to operate the corresponding elements of the switching means (ST) to proceed the logic combination to control the step-down operation to correspond to the corresponding voltage (S323), and proceeds to S313.

Here, the S310 to S323 corresponds to the S21 to S29, through the above process, the controller (MC) is to ensure a constant voltage is always supplied to the load (L) to enable a stable operation of the load (L). Can be.

On the other hand, as shown in Figure 7, the output voltage detection and constant voltage operation of the power supply control apparatus according to an embodiment of the present invention will be described in more detail as follows.

First, in the initialized state (S410), the controller MC controls the output voltage detector 130 to detect the output voltage output from the main transformer (MT) (S411), and converts the output voltage into an AD converter ( After conversion through 150 (S412), the memory is stored in a memory device such as the data input unit 160 (S413), and then the output voltage is displayed on the display and warning sound generating unit 170 (S414). . Thereafter, the controller MC compares the output voltage with a set voltage of the data input unit 160, which is a preset voltage (S415). Here, when the output voltage corresponds to the set voltage, the current output voltage is loaded as it is. The combination address of the tap transformer TT and the switching means ST corresponding to the current use voltage is maintained so as to be supplied to (L) (S416), and if the output voltage is larger than the set voltage, The step voltage is controlled by controlling the combination address of the tap transformer TT and the switching means ST to achieve the step-down (S417), and when the output voltage is smaller than the set voltage, the step-down is performed to correspond to the set voltage. Control the combination address of the (TT) and the switching means (ST) so that the boost is made (S418).

Here, the S410 to S418 corresponds to the S30 to S35, the controller MC, even if the current usage increases due to various operating conditions of the load (L) or increase of the load (L), the corresponding load ( It is possible to ensure a stable operation of the load (L) by constantly supplying the starting voltage required for the operation of L).

On the other hand, as shown in Figure 8, it will be described in more detail the ground fault detection operation of the power supply control apparatus according to an embodiment of the present invention.

First, in the initialized state (S510), the controller (MC) controls the data input unit 160 to set the threshold leakage value and the threshold leakage value (S511, S512), and then controls the leakage detection unit 110 The leakage current is detected (S513), and converted through the AD converter 150 (S514), and stored in a corresponding memory such as the data input unit 160 (S515). Thereafter, the controller MC compares the current leakage value with a preset threshold leakage value (S516), and when the current leakage value is greater than or equal to the threshold leakage value, compares the current leakage value and the threshold leakage value (S517). If the current leakage value is greater than or equal to the threshold leakage value in S517, the line switching unit 180 is controlled to cut off the input voltage supplied to the load L (S518), and the display and the warning sound generating unit 170 are displayed. After (S519), the process proceeds to S513. On the other hand, when the current leakage value in the S516 and S517 is less than the threshold leakage or threshold leakage value, the controller MC enables the continuous operation of the power supply control device (S520), and displays the current leakage value and the alarm sound generating unit. After displaying at 170 (S521), the flow advances to S513.

Here, the S510 to S521 corresponds to the S36 to S40, the controller MC can prevent a short circuit by cutting off the power supplied to the load (L) when a short circuit current occurs in the input power line (N, R_IN). have.

Therefore, according to the above-described power supply control apparatus, after detecting and comparing the voltage input to the current coil and the output voltage, the corresponding trigger signal is generated to change the voltage of the current coil by the magnetic flux linkage so that the voltage supplied to the load is increased. Automatically boosts or lowers the voltage so that the preset voltage is constantly output, and the disadvantage of NFB (No Fuse Breaker) in which the overload breaking current value is fixed. In order to restrain the power, the necessary current value can be set by arbitrarily setting the used load, and the power saving and safety system can shut off the power when an abnormal condition such as an overload or a short circuit occurs, or allow the power to be turned on again after a certain time when returning to the normal state. (ESS) can be met.

In addition, by detecting the synchronization between the voltage input to the current coil and the output voltage to operate the device of the switching means at zero cross to reduce the switching loss, to prevent the burnout of the device and to allow the above operations even when the load changes. have.

In addition, when the preset leakage current exceeds a predetermined value or the leakage current exceeds the rising threshold, it is possible to automatically cut off the voltage supplied to the load to protect human life.

Although the present invention has been described with reference to the specific embodiments, various modifications may be made without departing from the scope of the present invention. Accordingly, the scope of the invention is not to be determined by the embodiments described, but should be determined by equivalents of the claims and the claims.

Claims (4)

A main transformer MT connected in series to one end R_IN of the input power lines N and R_IN connected to the load L and having a predetermined turns ratio for supplying a set input power; A tap transformer TT connected to a secondary side of the main transformer MT and having a plurality of magnetic flux linkage taps for correcting a voltage corresponding to the change value based on a voltage change of an input power applied through the primary side; Switching means (ST) for mutually combining a plurality of magnetic flux linkage taps corresponding to the voltage change value; A ground fault detector 110 connected to an output line of the ground fault breaker CT connected to the meter C to detect and output a ground fault current; An input voltage detector 120 connected to a primary side of the main transformer MT to detect an input voltage; An output voltage detector 130 connected to a secondary side of the main transformer MT to detect an output voltage; An amplifier 140 for amplifying and outputting the signal output from the ground fault detector 110; An AD converter 150 converting and outputting the signal amplified by the amplifier 140 into a digital signal; A data input unit 160 storing leakage current limit data and rising leakage current data corresponding to the leakage current output from the AD converter 150; A display and warning sound generating unit 170 which displays the leakage current and the input / output voltage and simultaneously generates a warning sound according to a control signal of a controller MC; Control of the controller MC when an overvoltage or overcurrent is supplied to the load L or when a system test data is input to the data input unit 160 to test the system and an error occurs or a leakage current exceeding a threshold is generated. A line switching unit 180 to cut off power supplied to the load L according to the signal; A control time data storage unit 210 configured of a memory device in which an operating time of the load L is stored; Address storage unit 220 consisting of a memory for storing the unique data of the power control device; A year-end calendar storage unit 230 for storing calendar data corresponding to year, month, and day and time data corresponding to day and time for the operation of the load L; A latch unit 240 for latching data output from the controller MC and outputting an address signal; An interface unit 250 for transmitting data corresponding to a result of the system test, a unique number, calendar data, and time data to an external device; A buffer 260 that buffers the address signal of the latch unit 240 to be supplied to an external device or buffers and outputs a control signal output from the controller MC; And comparing the data corresponding to the leakage current output from the AD converter 150 with the leakage current limit data and the rising leakage current data set and input from the data input unit 160 to output a predetermined control signal, and simultaneously Output a plurality of trigger control signals according to the data output from the input voltage detector 120 and the output voltage detector 130 so that the rated voltage is always supplied to the load (L), and at the same time the operation of the load (L) is set It includes a controller (MC) for overall control of the components (110 to 180 and 210 to 260) to operate over time, check the operation and failure of the system and output the data according to the result,
The main transformer (MT),
The polarity of the primary and secondary is set in the boosting direction, the power terminals to be applied from the primary side of the tap transformer TT are set to the secondary side (Y1, Y2), and the windings of the secondary (Y1, Y2) terminals. The coil voltage value is set to the highest voltage value of the tap transformer (TT),
The tap transformer TT is,
A plurality of positive taps P1 and P2 connected to one end Y1 of the main transformer MT to set a reference voltage CT providing a reference voltage and configured in a boosting direction around the reference voltage CT; ) And a plurality of negative taps (N1, N2, N3) formed in the step-down direction centered on the reference voltage (CT) to form a primary side combination, and are connected to the second end (Y2) of the main transformer (MT). The secondary side combination is set by forming a plurality of magic taps (M1, M2, M3) configured to be,
The switching means (ST),
It includes a plurality of triacs (T1-T6, stepped CT, stepped CT) directly connected to each tap of the tap transformer (TT), the T1, T2, T3 are directly connected to M3, M2, M1, T4 , T5, T6 is directly connected to N1, N2, N3 or P2, P1, respectively, the step-up CT and step-down CT are directly connected between the primary side of the tap transformer (TT) and the secondary side of the main transformer (MT),
Magic tap of the tap transformer (TT),
Winding ratio of the main transformer (MT) * It is formed in a series structure in the step-down direction in multiples of the default voltage conversion,
The positive tab is
It is a multiple of CT tap value + Magic tap setting order and is formed in a series structure in the boosting direction.
The negative tap,
CT tap value-It is formed in a serial structure in the step-down direction in multiples of the value (equivalent value) of the magic tap setting order.
The switching means (ST),
An overcurrent protection unit for protecting the corresponding components such that the high voltage induced in the tap transformer TT is not supplied to the controller MC through the photosensors respectively operated according to a plurality of trigger control signals output from the controller MC; Not shown), a transistor (not shown) switched according to the operation of the photosensors, and a fuse and a high resistance to protect the triac. delete delete The method of claim 1, wherein the switching means (ST),
When one of the plurality of triacs is damaged by being connected to one end of the tap transformer TT in which the number of turns varies according to the operation of the triac, a voltage higher than a predetermined value induced from the tap transformer TT is transmitted to the controller MC. The power supply control device further comprises a triac damage detection unit (not shown) to supply the line switching unit 180 to operate.

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