KR20000025722A - Apparatus for controlling power source - Google Patents

Abstract

PURPOSE: An apparatus for controlling a power source is provided to start at a rated voltage regardless of an input voltage level by controlling an output voltage of an electric current coil with varying the number of windings. CONSTITUTION: An electric current coil(L1) varies a voltage supplied to a load(120)according to a flux linkage. A current detection part(3) detects a current supplied to the electric current coil(L1) and outputs data corresponding to the current. An output voltage detection part(5) detects a voltage supplied to the load(120). A system controller(10) outputs plural trigger control signals according to the coil(L1) and the detection parts(3, 5) and controls peripheral units and outputs data according to a result of the apparatus.

Description

Power control unit

The present invention relates to a power control device for controlling load power by controlling an AC power supply voltage supplied to a street lamp or a computer system and other electronic products according to load characteristics and purposes, and more particularly, to vary a voltage supplied to a load. After detecting and comparing the level of the voltage inputted to the current coil and the output voltage, a plurality of trigger signals are generated as soon as the input / output voltage is synchronized and turned on / off at zero cross to wind the flux linkage coil coupled to the current coil. By varying the number, the output voltage of the current coil is adjusted so that the input voltage supplied to the load is lower when the input voltage is high, and when the input voltage is low, it starts at the rated voltage and when the constant load current increases, this operation is performed and the voltage adjusted according to the set value Of a power supply control device which ensures constant control at all times to be.

In general, devices that use electricity as power or lighting, such as electric motors, discharge lamps, and fluorescent lamps, require a relatively high voltage at the initial start, so that the efficiency is maximized. Power should be used efficiently by adding and subtracting the voltage within the allowable range. When the initial lighting is turned on, high power or low voltage is inputted, and the efficiency of the device is reduced and the life of the load is shortened. Was required.

Accordingly, the present applicant has developed a power control device and a method for solving the above problems and filed a patent application (application number 97-15239) on April 24, 1997.

The power control device and the method switch the number of windings of the magnetic flux linkage coils that are wound and coupled to generate a plurality of trigger signals according to the input voltage of the current coil for controlling the current supplied to the load so as to dissipate the magnetic flux of the current coil. It is configured to supply a gate of a plurality of triacs to control the voltage supplied to the load.

Since the power control device configured as described above controls the voltage supplied to the load by using the voltage supplied to the current coil, a phase difference occurs between the output voltage of the current coil and the input voltage, thereby switching the number of turns of the magnetic flux linkage coil. There was a problem that the plurality of triacs are broken or the overvoltage is supplied to the load.

Accordingly, the present invention has been made to solve the above-mentioned shortcomings, and an object of the present invention is to detect and compare the voltage inputted to the current coil varying the voltage supplied to the load and output the voltage accordingly. In order to generate a plurality of trigger signals to increase or decrease the magnetic flux of the current coil, the winding voltage of the winding-coupled magnetic flux linkage coil is varied to adjust the output voltage of the current coil.

When the initial power supply is supplied, when the supply voltage is higher or lower than the rated low voltage, it is always supplied at the rated voltage, and the switching element is turned on / off at zero cross to reduce the switching loss and switching by detecting the synchronization of the input voltage and the output voltage. The present invention provides a power supply control device which solves the problem of element burnout and enables the above operation even when a predetermined load increases by the current detection device.

In order to achieve the above object, the power supply control apparatus according to the present invention includes a current coil for varying a voltage supplied to a load according to a magnetic flux linkage, and a current for detecting current supplied to the current coil and outputting corresponding data. A detector, an input voltage detector for detecting a voltage supplied to the current coil, an output voltage detector for detecting a voltage supplied to the load through the current coil, an output from the current detector, an input voltage detector, and an output voltage detector A system that outputs a plurality of trigger control signals according to the data and simultaneously controls the peripheral devices in order to operate the load according to the set time, and checks the operation and failure of the system and outputs the data according to the result. A controller and a plurality of triggers output from the system controller The number of windings of the magnetic flux chain bridge coil coupled to the current coil is varied by the operation of the switching unit and the switching unit, and the voltage supplied to the load is determined by determining the increase or decrease of the magnetic flux chain bridge of the current coil. Characterized in that configured to the output voltage adjusting unit.

1 to 3 show a power control device according to the invention.

4 is a view showing a three-phase connection state of the output voltage adjusting unit shown in FIG.

Explanation of symbols on the main parts of the drawings

1 ... constant voltage generator 2 ... line switching unit

3 ... current detector 4 ... input voltage detector

5.Output voltage detector 6 ... First amplifier

7.Data input section 8 ... Display section

10 ... System controller 20 ... Control time data storage

30 ... latch 40 ... unique address storage

50 ... Program storage 60 ... Data storage

70 Interface section 75 Buffer

80 ... Amplification 85 ... Overcurrent Protection

90 ... switching part 100 ... output voltage regulator

120 ... load

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

1 to 3 is a view showing a power control device according to the present invention. In the figure, the constant voltage generator 1 is typically configured to supply a constant voltage to a peripheral device by using a commercial AC power source consisting of a bridge circuit, a smoothing circuit and a regulator, and the line switching unit 2 is an overvoltage or an overcurrent to a load. To cut off the power supplied to the load by the line switching control signal output from the system controller 10 to be described later when an error occurs when the system test data is input to the data input unit 7 and the system test data is input. Consists of.

On the other hand, the current detection unit 3 provided in front of the current coil L1 connected in series with the load 120 to regulate the voltage supplied to the load 120 is composed of a moving iron coil, and the input voltage detection unit 4 ) Is connected to the small transformer (TN1) in front of the current coil (L1) to detect the current and voltage of the commercial AC power input to the input terminal, respectively, through the first amplifier (6) input port of the system controller 10 It is connected to supply. In addition, the output voltage detector 5 connects the small transformer TN2 to the rear end of the current coil L1 to detect the voltage supplied to the load 120 and the system controller 10 through the first amplifier 6. It is connected to supply to input port of.

The system controller 10 outputs a plurality of trigger control signals according to data output from the current detector 3, the input voltage detector 4, and the output voltage detector 5, and simultaneously operates the load according to a set time. It is configured to supply a predetermined drive signal to control the peripheral device as a whole to operate and to display on the display section 8 whether the system is in operation or not.

The control time data storage unit 20 is configured with a memory device that stores a time for turning on a 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, 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 test result of the system, a unique number, and data corresponding to the year, month, day, day of the week, and time to an external device, and the buffer 70. Is configured to buffer an address and supply it to an external device, and the buffer 75 is configured to buffer and output a trigger control signal output from the system controller 10.

On the other hand, the over-current protection unit 85 is output from the system controller 10, the photo sensor (PT1-PT10) respectively operated in accordance with a plurality of trigger control signals passed through the buffer 75 and the second amplifier 80 The high voltage induced in the flux linkage coil L2 described later is not supplied to the system controller 10 or the like.

The switching unit 90 is a magnetic flux linkage coupled to a winding of the transistors Q1-Q10 switched by the operation of the photosensors PT1-PT10 and the current coil L1 in accordance with the operation of the transistors Q1-Q10. It consists of a triac T1-T10 which changes the number of turns of the coil L2, the fuse F which protects the triac T1-T10, and the high resistance R. As shown in FIG.

Referring to the operation of the power control device having an embodiment as described above in detail.

When the commercial AC power is supplied to the input terminal of the power control device according to the present invention, the constant voltage generator 1 rectifies and smoothes the input commercial AC power and supplies the constant voltage output to the peripheral device.

When the constant voltage output from the constant voltage generator 1 is supplied to the peripheral device, the system controller 10 is placed at the front end of the load 120 until the voltage supplied from the output voltage detector 5 to the load 120 is detected. The installed line switching unit (not shown) is " off " to prevent the initial voltage from being supplied to the load 120.

When the AC power is supplied in the state in which the initial voltage supplied to the load 120 is cut as described above, the current detector 3 installed at the front end of the current coil L1 detects the current of the input power and corresponds to the data. Is supplied to the input port of the system controller 10 through the first amplifier 6, the input voltage detector 4 detects the voltage supplied to the current coil (L1) and the corresponding data to the first amplifier (6) is supplied to the other input port of the system controller (10).

Meanwhile, another input port of the system controller 10 is supplied with an output signal of the output voltage detector 5 for detecting the voltage passing through the current coil 11 through the first amplifier 6.

As described above, when respective data detected by the current detector 3, the input voltage detector 4, and the output voltage detector 5 are supplied to each input port of the system controller 10, the current of the commercial AC power inputted is It is determined whether the predetermined value or more is supplied, and according to the result, the operation control signal of the line switching unit 2 is supplied to prevent over current from being supplied to the load 120, and the input voltage detecting unit 3 and the output voltage detecting unit ( When the data corresponding to the voltages detected in 5) are "0", that is, when the input commercial AC power and the output commercial AC power are matched to the current coil L1, the input voltage is detected and the current coil L1 is detected. The predetermined trigger control signal is supplied to the photoelectric sensors PT1-PT10 of the overcurrent protection unit 85 through the buffer 75 and the second amplifier 80 so that a constant voltage is always output.

For example, when the voltage of the commercial AC power supplied to the input terminal of the device is lower than a predetermined value, the 10 controller signals each having a level of 0 0 0 0 1 1 0 0 0 0 are output from the system controller 10 to overcurrent. When supplied to the protection unit 85, the photo sensor PT5 and PT6 operate.

When the photosensors PT5 and PT6 are operated, the transistors Q5 and Q6 of the switching unit 90 are “on” so that the triac T5 and T6 operate to operate the magnetic flux of the output voltage adjusting unit 100. The number of windings of the linkage coil L2 is variable to adjust the increase and decrease of the magnetic flux linkage so that the voltage output from the current coil L1 is always output a constant voltage regardless of the level of the commercial AC power supplied to the input terminal. Is supplied.

In addition, when the voltage of the commercial AC power supplied to the input terminal of the device is above a certain value or below a certain value, 10 trigger signals each having a level of 1 1 0 0 0 0 0 0 0 0 are output from the system controller 10. When the output is supplied to the over-current protection unit 85, the photo sensor PT1 (PT2) is operated to drive the triac (T1) (T2) of the switching unit 90, accordingly the magnetic flux of the output voltage control unit 100 The number of windings of the coil of the linkage coil L2 is variable so that a constant voltage is always supplied to the load 120. In addition, when the device is initially operated, when the input voltage is above a certain value or below a certain value, a plurality of different trigger signals are output to output a constant voltage to the load 120.

On the other hand, if the corresponding data is supplied to the data input unit 7 to test the operation of the device, the system controller 10 scans the input data to sequentially output a plurality of trigger signals having a "high" level It is checked whether the fuse F connected between the triac T1-T10 or the triac T1-T10 of the switching unit 85 and the magnetic flux linkage coil L2 is broken and the result is displayed on the display unit 8. It is possible to visually identify whether a system has failed by displaying it.

In addition, when commercial AC power is input to the input terminal, the system controller 10 determines whether the system is in a normal state, and if it is not in a normal state, address the predetermined control data through the latch unit 30 at the data output ports D0-D7. After reading the unique address of the system by supplying it to the address input ports A9-A16 of the storage unit 40, the data is temporarily stored in the data storage unit 60 and a read signal is supplied 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 to be sent to a computer, which is an external device, it is possible to know whether the power control device is broken at a specific place.

According to the present invention described above, after detecting and comparing the level of the input voltage and the output voltage to the current coil connected in series with the load, a plurality of trigger signals are generated according to the input voltage when the input / output voltage is matched to "0V". By varying the number of windings of the magnetic flux linkage coil coupled to the winding of the current coil by controlling the output voltage of the current coil to constantly control the voltage supplied to the load,

When the input voltage is higher than the rated voltage, the number of windings of the magnetic flux linkage coil coupled to the current coil is adjusted to demagnetize the magnetic flux linkage of the current coil, and when the input voltage is lower than the rated voltage, the current coil and the winding By adjusting the number of windings of the coupled magnetic flux linkage coil, the magnetic flux linkage of the current coil can be increased to always start at the rated voltage to eliminate the cause of prolonging the life of the device and reducing the efficiency, and also to increase the constant load current. Since the above operation is performed at the same time, there is an effect of preventing deterioration of the device efficiency, and a trigger signal for driving the triac is output when the voltage inputted to the current coil and the output voltage match to 0 V, so that the overvoltage occurs when the triac is operated. By preventing the supply of triac is effective in solving the problem.

Claims (5)

A current coil which varies a voltage supplied to a load according to a magnetic flux linkage, A current detector for detecting a current supplied to the current coil and outputting data corresponding thereto; An input voltage detector for detecting a voltage supplied to the current coil; An output voltage detector for detecting a voltage supplied to the load through the current coil; In order to output a plurality of trigger control signals according to data output from the current detector, the input voltage detector, and the output voltage detector, to control the peripheral devices as a whole according to the set time, and to operate and troubleshoot the system. System controller to check the presence and output the data according to the result, A switching unit which operates according to a plurality of trigger control signals output from the system controller, The magnetic flux chain bridge coil coupled to the current coil by the operation of the switching unit has a variable number of windings for the multiplier and the potato to determine the increase and decrease of the magnetic flux chain bridge of the current coil, and is composed of an output voltage adjusting unit for adjusting the voltage supplied to the load. Power control device, characterized in that. The power supply of claim 1, wherein the input / output voltage detector is configured by connecting small transformers to front and rear ends of the current coil to detect a voltage input to the current coil and an output voltage, and output a signal corresponding thereto. controller. The switching unit of claim 1, wherein the switching unit is configured to switch the switching elements respectively switched according to the operation of the plurality of photo sensors, and the plurality of windings varying the number of windings of the magnetic flux linkage coil wound and coupled to the current coil according to the operation of the switching elements. And a fuse and a high resistance for protecting the triacs. 4. A current according to any one of claims 1 to 3, wherein the output voltage adjusting unit is constituted by coils for a plurality of flux linkage increasers and a plurality of flux linkage potatoes to control the voltage supplied to the load according to the operation of the switching unit. Power control device, characterized in that coupled to the coil and the winding. The power supply of claim 1, wherein the system controller outputs a plurality of trigger signals when a voltage input to the current coil and a tap voltage of the magnetic flux linkage coil coupled to the current coil are zero crossing. controller.