KR19980077903A - Power control device and method - Google Patents

Abstract

According to the present invention, a DC voltage generator converts AC commercial AC power into a DC voltage and outputs the trigger control signal according to the voltage output from the DC voltage generator. In order to control the peripheral devices as a whole, the system controller which checks the operation and failure of the system and outputs the data according to the result, and compares the voltage output from the DC voltage generator with the overvoltage to determine a predetermined control signal. An overvoltage detector for outputting a signal; A second line switching unit which cuts off power supplied to the load according to the It consists of a voltage switching unit for controlling the winding ratio of the coil coupled to the coil in series with the load according to the trigger control signal output from the recombination unit, detects the level of the voltage supplied to the load and accordingly triggers the trigger signal By outputting the magnetic flux linkage to the coil connected in series to the power supply line of the load to supply a constant voltage to the load at all times to extend the life of the load.

Description

Power control device and method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply control device and method for efficiently controlling an AC power supply voltage supplied to a street light or a computer system and other electronic products. More particularly, the present invention relates to a level of a DC voltage after converting AC to DC. Accordingly, since a plurality of trigger signals are generated to regulate the voltage of the secondary voltage coil, a magnetic flux linkage occurs in the current coil so that the AC voltage supplied to the load is constantly and efficiently controlled, and power loss can be reduced. A power supply control apparatus and method thereof are provided.

In general, the power control device adjusts the output change by the tap-changing method of the secondary voltage change of the transformer as a means for constantly adjusting the AC AC power supplied to the load power and the lighting device.

The tap-changing method has a problem in that the load or the transformer is burned out due to the limitation of the micro-transformation and the transient phenomenon generated during the tap-changing since the secondary voltage is controlled by the constant number of taps.

In addition, a motor or lighting load requires a relatively high starting voltage when starting or lighting, and a relatively low AC power supply voltage is required during movement or lighting, and the power control device used here is applied to a transformer according to a tap changeover. There was a problem that causes the waste of its own power.

Accordingly, the present invention was created to solve the above-mentioned shortcomings, and an object of the present invention is to convert AC into DC and generate a plurality of trigger signals according to the level of the DC voltage to generate the secondary voltage coil. The present invention provides a power supply control device and a method for controlling the AC voltage supplied to a load by regulating the voltage to control the AC voltage supplied to the load at a constant time and reducing power loss.

In order to achieve the above object, the power supply control apparatus according to the present invention, a DC voltage generating unit for converting and outputting AC commercial AC power to a DC voltage, and outputs a trigger control signal according to the voltage output from the DC voltage generator In addition, in order to operate the load according to the set time, the overall control of the peripheral device, and checks the operation and failure of the system and outputs the data according to the result, and the output from the DC voltage generator A logic for blocking the trigger control signal when the voltage is overvoltage by performing a logical multiplication of the overvoltage detector for outputting a predetermined control signal by comparing the voltage with the overvoltage, and outputting a predetermined control signal and a plurality of trigger control signals output from the system controller. The combination unit and the load according to the signal output from the overvoltage detection unit. A second line switching unit which cuts off a sudden power supply, and a voltage switching unit which controls a winding ratio of a coil coupled to a coil connected in series with a load in accordance with a trigger control signal output from the logic combination unit. do.

On the other hand, the power supply control method according to the present invention, the determination step of determining whether the level of the DC voltage output from the DC voltage generating unit for converting the commercial AC power supplied to the load to the DC voltage or more than the threshold value, and the determination step If the DC voltage is less than the threshold value determined in the above, the trigger signal generating step of outputting different trigger signals according to the variation of the DC voltage, and the coil connected to the power input line of the load according to the trigger signals output from the trigger signal generating step Characterized in that it is made of a voltage adjustment step of controlling the voltage supplied by loading by flux linkage.

1 is a view showing an outline of a power supply control device according to the present invention.

2 to 4 is an exemplary view of a power control device according to the present invention.

5 is a flowchart illustrating the operation of the power supply control device according to the present invention.

* Explanation of symbols for the main parts of the drawings

5: DC voltage generator 6: sunrise detection unit

7: first line switching unit 8: second line switching unit

10: system controller 12: overvoltage detector

20: control time data storage unit 30: latch unit

35: yearly calendar data storage 40: unique address storage

50: program storage unit 60: data storage unit

70: interface unit 75: buffer

110: logic combination unit 120: amplification unit

130: voltage switching unit 140: load

Hereinafter, the present invention will be described in more detail with reference to the illustrated drawings.

1 is a view showing an outline of a power supply control apparatus according to the present invention, Figure 2 is an embodiment of a power control apparatus according to the present invention.

1 to 4, the DC voltage generator 5 is configured to convert AC commercial AC power supplied to the load 140 into a DC voltage and output the DC voltage. The system controller 10 includes the DC voltage generator ( Output the trigger control signal according to the voltage output from 5) and control the peripheral devices as a whole to operate the load according to the set time, and check the operation and failure of the system and output the data according to the result. It is supposed to.

On the other hand, the overvoltage detector 12 is input from the DC voltage generator 5, the voltage passing through the resistors (R1-R4) and capacitors (C1, C2) and the reference voltage determined by the variable resistor (VR), respectively Comparator (COM) for comparison, the photo sensor (PT) for operating the output level of the comparator (COM) to generate a switching signal, and operates in accordance with the switching signal output from the photo sensor (PT) It consists of a switching element SCR and a reset switch RESW which output a switching control signal and a predetermined control signal.

The logic combination unit 110 includes an array resistor 112 for pulling up levels of a plurality of trigger control signals output from the system controller 10, and a clock control signal for a trigger control signal whose level is increased by the array resistor 112. The latch gate 114 which latches according to the combination, the trigger control signal output from the latch unit 114 and the signal output from the overvoltage detection unit 12 are combined, and the AND gate A1 blocking the trigger control signal when the overvoltage occurs. -18).

In addition, the first line switching unit 7 detects a sunrise and relays the commercial AC power line supplied to the load 140 according to the level of the output signal of the sunrise detection unit 6 for thrusting the data corresponding thereto. The second line switching unit 8 is configured as a relay driving circuit to switch the commercial AC power line supplied to the load 140 according to the signal output from the overvoltage detection unit 12.

The control time data storage unit 20 is configured with a memory device that stores a time for lighting a street lamp, which is the load 140, and the address storage unit 40 is configured with a memory for storing intrinsic data of the power control device. .

On the other hand, the year-end calendar data storage unit 35 is composed of a memory element that stores the data corresponding to the year, month, day and day and time, the latch unit 30 is the data output from the system controller 10 And a plurality of D-type flip-flops serving as latch elements to output an address signal by latching the.

In addition, the interface unit 70 includes an interface for transmitting data corresponding to a result of testing the system, a unique number, and data corresponding to the year, month, day, day of the week, and time to an external device, and a buffer 70 ) Is configured to buffer the address and supply the external device, and the buffer 75 is configured as a buffer for buffering and outputting a trigger control signal output from the system controller 10.

On the other hand, one embodiment of the power switching unit 130 is a photo sensor (PT1-PT8) and the photo sensor (operating according to the level of the plurality of trigger control signals amplified by the amplifier 120, as shown in Figure 4a, respectively, PT1-PT8 is connected to different taps of the coil L2 to control the winding ratio of the coil L1 connected in series to the power supply line of the load 140 and the coil L2 wound in series. It is composed of a plurality of triacs (TC1-TC8) to generate a flux linkage to the coil (L1) in accordance with the voltage so that a constant voltage is always supplied to the load 140.

In addition, another embodiment of the power switching unit 130 is a photo sensor (PT40-PT47) that operates according to the level of the plurality of trigger control signals amplified by the amplifier 120, as shown in Figure 4b, and the photo Connected to different taps of the coil L2 to control the winding ratio of the coil L1 and the coil L2 connected in series with the power supply line of the load 140 according to the operation of the sensors PT40-PT47. Thyristors (S1, S2) (S3, S4) (S5, S6), which are a plurality of switching elements that generate a flux linkage to the coil (L1) according to an input voltage so that a constant voltage is always supplied to the load (140) ( S7, S8 (S9, S10) (S11, S12) (S13, S14) (S15, S16).

The operation of the power supply control device having the above embodiment will be described in detail with reference to the flowchart shown in FIG. 5.

AC commercial power as in step S1 of FIG. 5 in a state in which a street light that is a load 140 is connected to the other end of the coil L1 to which the AC commercial AC power is applied to the power control device according to the present invention as shown in FIGS. 1 to 4. When the AC power is supplied, the DC voltage generator 5 outputs the output voltage according to the level of the AC commercial AC power input to the overvoltage detector 12 and the sunrise detector 6.

The sunrise detection unit 6 is composed of a sensor and a resistor, and detects when the illuminance is a predetermined value or more to operate the first line switching unit 7 to supply AC commercial AC power to the second line switching unit 4. do.

On the other hand, the voltage output from the DC voltage generator 5 is supplied to the inverting terminal of the comparator COM through the resistors R1-R4 and the capacitors C1 and C2 of the overvoltage detector 12 and thus the non-inverting terminal. When the voltage supplied to the inverting terminal of the comparator COM is greater than the reference voltage, the output of the comparator COM is 'low', so that the photosensor PT is activated so that the switching signal is switched. It is supplied to the gate terminal of (SCR).

When the switching signal is supplied to the gate terminal of the switching element SCR, the switching element SCR is operated, so that the outputs of the AND gates A1-A8 of the logic combination unit 110 to be described later become low, and the second The line switching unit 8 is turned off to cut off the AC commercial AC power supplied to the load 140 to protect the load 140.

The above-described operation description describes the process of protecting the load 140 when the input AC commercial AC power is more than a predetermined value, and the following description of operation describes the load 140 when the AC commercial AC power is less than the predetermined value. The process of supplying a constant voltage at all times will be described.

When AC commercial AC power is supplied, the voltage output from the DC voltage generator 5 is supplied to the system controller 10 shown in FIG. 1, and the system controller 10 is a DC voltage as shown in step S2 of FIG. 5. In step S3, it is determined whether the DC voltage is greater than or equal to the threshold value. For example, if the threshold voltage is greater than or equal to the threshold value, the peripheral device is controlled to cut off the AC power supplied to the load 140 as in step S6. As a result, when the DC voltage is less than the threshold, a plurality of different trigger control signals BD0-BD7 are output through the buffer 75 according to the variation of the DC voltage as in step S4.

On the other hand, when AC commercial AC power is input, the system controller 10 determines whether the system is in a normal state, and if it is not in a normal state, store the predetermined control data through the latch unit 30 at the data output ports D0-D7. Read the unique address of the system by supplying it to the address input ports A9-A16 of the unit 40, and temporarily storing it in the data storage unit 60, and supplying a read signal to the later-year calendar data storage unit 35. By supplying the unique address and date of the system and the corresponding error message to the interface unit 70 and sending it to a computer which is an external device, it is possible to know whether or not the power control device is broken at a specific place.

On the other hand, if the system is normal, it is determined whether the current time is the street light lighting time, which is the load 140 stored in the control time data storage unit 20. As a result, if the green light lighting time is not the second line switching unit 8 In operation, the power is not supplied to the load 140, and if the lighting time is reversed, a plurality of different trigger control signals BD0-BD7 are output through the buffer 75 according to the change of the DC voltage as in step S4.

The plurality of trigger control signals BD0-BD7 output from the buffer 75 are up-leveled by the array resistor 112 of the logic combination unit 110 and then latched by the latch unit 114 to be AND gates A1-. The voltage inputted to one end of A8 and logically multiplied with the voltage Vcc input to the other end is output. If the voltage output from the DC voltage generator 5 is greater than or equal to the threshold value, the voltage input to the other end of the overvoltage detection unit ( Since Vcc) is bypassed to the ground terminal, the outputs of the AND gates A1-A8 become low so that the trigger control signal is not output.

After the plurality of trigger control signals output from the AND gates A1-A8 are amplified by the amplifier 12, the photosensors PT1-PT8 of the voltage switching unit 130 shown in FIGS. 4A and 4B ( The light emitting diodes of the PT40-PT47 are respectively supplied. For example, when the levels of the plurality of trigger control signals BD0-BD7 are 1,0,0,0,0,0,0,1, the photo sensors PT1 and PT8 Since only PT40 and PT47 are operated, the triac TC1-TC8 of FIG. 4A and the thyristors S1, S2, and S15 and S16 of FIG. 4B are operated to input the turns ratio of the coil L2. Since the magnetic flux linkage is generated in the coil L1 connected in series with the power input line of the load 140 by controlling according to the level of the power source, the AC voltage supplied to the load 140 is constantly controlled as in step S5.

According to the present invention described above, it is checked whether the time for driving the load is supplied to the AC commercial AC power supply to the load if the load driving time, and if the AC power supplied to the load is above the threshold, the AC supply line is automatically switched to overvoltage The load can be prevented from being destroyed, and the level of the voltage supplied to the load is detected, and as a result, a magnetic flux linkage is generated in a coil connected in series with the power supply line of the load by outputting a trigger signal so that a constant voltage is always applied. By supplying it to, it has the effect of extending the life of the load.

Claims (5)

DC voltage generator for converting AC commercial AC power into DC voltage and outputting a trigger control signal according to the voltage output from the DC voltage generator and peripheral device for operating the load according to the set time To control the overall operation of the system and check the operation and failure of the system and output the data according to the result, and the overvoltage outputting the predetermined control signal by judging whether the voltage output from the DC voltage generator is overvoltage A logic combination unit for logically multiplying a detector, a signal output from the overvoltage detector and a plurality of trigger control signals output from a system controller, and supplying the load to a load according to a signal output from the overvoltage detector A second line switching unit which cuts off a power supply; and the logic combination unit Depending on the document output trigger control signal is a power control system, characterized in that the voltage switch-part for controlling the turn ratio of the coil that is coupled with a coil winding which is connected in series with the load. The comparator of claim 1, wherein the overvoltage detector is configured to compare a voltage output from the DC voltage generator and a reference voltage determined from a variable resistor and a voltage output through the resistor and the capacitor, respectively, according to an output level of the comparator. And a photo sensor which operates to generate a switching signal, and a switching element which operates according to the switching signal output from the photo sensor to output a line switching control signal and a predetermined control signal. The latch unit of claim 1, wherein the logic combination unit latches an array resistor for pulling up levels of a plurality of trigger control signals output from a system controller and a trigger control signal whose level is increased by the array resistor according to a clock signal. And a plurality of gate elements which block the trigger control signal when the overvoltage is combined by combining the trigger control signal output from the latch unit and the signal output from the overvoltage detection unit. The power supply switching unit of claim 1, wherein the power switching unit comprises: a plurality of photosensors operating in accordance with the level of the amplified plurality of trigger control signals, and a first coil connected in series to a power supply line of the load in response to the operation of the photosensors; A plurality of switching elements connected to different taps of the second coil to control the winding ratio of the winding-coupled second coil to generate a magnetic flux chain bridge to the first coil in accordance with the input voltage so that a constant voltage is always supplied to the load. Power control device, characterized in that configured. A judging step of judging the level of the DC voltage output from the DC voltage generator that converts the commercial AC power supplied to the load to the DC voltage, and determining whether the DC voltage is greater than or equal to the threshold value; The trigger signal generation step of outputting different trigger signals according to the fluctuation of? And the coil connected to the power input line of the load according to the trigger signals output from the trigger signal generation step by magnetic flux chain linkage to uniformly supply the supplied voltage. A power supply control method comprising a voltage adjusting step of controlling.