KR101409355B1 - Power supply for power line - Google Patents

Abstract

Disclosed herein is a power supply apparatus for a high-voltage power line that can be easily installed without being limited by space, and is capable of stably supplying power regardless of the magnitude of the current flowing through the high-voltage power distribution line.
The power supply for the high voltage distribution line includes an input part for inducing a current from the high voltage distribution line; A rectifying unit for rectifying an AC input voltage from the input unit to a DC input voltage; A high voltage control unit for switching a high voltage direct input voltage inputted from the rectifying unit to generate a first output voltage; A low voltage control unit for switching a low-voltage direct-current input voltage inputted from the rectifying unit to generate a second output voltage; And a composite output unit for outputting at least any one of the first output voltage and the second output voltage as a supply voltage.

Description

[0001] POWER SUPPLY FOR POWER LINE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply apparatus, and more particularly, to a power supply apparatus for a high-voltage power line that supplies power from a high-voltage power distribution line to a load.

A power system is a collective term for the overall process and equipment system in which electricity is produced and used. Generally, a power system is composed of a power generation system that generates electric power, a transmission system that transports produced electric power to a demand side, and a distribution system that distributes electric power to a consumer.

The power generation system is a series of steps for converting other energy sources into electric energy, and produces electric power by converting various energy sources such as hydro, thermal, nuclear, tidal, wind power into electric energy.

Transmission system means a system that transports power generated by a power plant to a customer in a factory or a home, that is, to the load side. Transmission systems include, for example, transmission lines in which wires are floated in the air, and underground transmission where wires are embedded in the ground, depending on the location of the transmission line.

On the other hand, the distribution system is a system that distributes the electric power transmitted through the transmission system to the actual power demand site. Such a distribution system includes a distribution substation for converting the power from the transmission line to a distribution voltage, a distribution transformer for converting the voltage to a voltage that is easy to supply to the customer at a lower voltage, a distribution line for distributing power from the substation to the consumer, And a lead-in line connected to an inlet of the separator.

Among them, distribution lines are classified into special high-voltage distribution lines, high-voltage distribution lines and low-pressure distribution lines depending on the magnitude of the supplied voltage.

In the conventional power distribution, power supplied from a high-voltage power distribution line is transformed through a direct-contact type power distribution transformer as described above to supply power to the load.

Therefore, when a load is applied to the transmission system, it is inefficient because an additional distribution line must be installed. In addition, there is a problem that transforming is impossible in a space where the direct contact method can not be applied.

In addition, in the case of the conventional power supply apparatus, the power supply does not correspond to the magnitude of the current flowing in the high-voltage power distribution line, and the power supply is unstable.

It is an object of the present invention to provide a power supply apparatus for a high voltage distribution line which can be installed easily and efficiently without restriction of a space, and can stably supply power regardless of the magnitude of a current flowing in a high voltage distribution line.

According to an embodiment of the present invention, there is provided a power supply apparatus comprising: an input unit for deriving a current from a high voltage distribution line; A rectifying unit for rectifying an AC input voltage from the input unit to a DC input voltage; A high voltage control unit for switching a high voltage direct input voltage inputted from the rectifying unit to generate a first output voltage; A low voltage control unit for switching a low-voltage direct-current input voltage inputted from the rectifying unit to generate a second output voltage; And a composite output section for outputting at least any one of the first output voltage and the second output voltage as a supply voltage.

The high-voltage direct-current input voltage is higher than the reference voltage based on a predetermined reference voltage, and the low-voltage direct-current input voltage is lower than the reference voltage.

The DC input voltage of the high voltage is a voltage of the reference voltage or more based on a predetermined reference voltage band, and the DC input voltage of the low voltage is a voltage of the reference voltage or less.

Wherein the input section comprises: an input terminal section including at least one current transformer for inducing a current from the high voltage distribution line; And a switch portion corresponding to the current transformer and including at least one switch for short-circuiting the current transformer.

The rectifying part includes at least one bridge diode connected to an output terminal of the input part.

The rectification part includes at least one electrolytic capacitor for smoothing the rectified DC input voltage.

A high voltage switching control circuit for switching the high voltage direct current input voltage to output a direct current output voltage; Rectifying circuit for rectifying the DC output voltage and outputting the rectified DC output voltage to the first output voltage; And a high voltage constant voltage control and feedback circuit for maintaining the first output voltage constant and feeding back the output state of the first output voltage to the high voltage switching control circuit.

Wherein the high-voltage switching control circuit comprises: a switching control element for switching the high-voltage direct-current input voltage; And a transformer for transforming the switched high-voltage direct-current input voltage into the direct-current output voltage.

The rectifier circuit for high voltage includes at least one smoothing diode or smoothing capacitor.

Wherein the high voltage switching control circuit includes a phototransistor, and the high voltage constant voltage control and feedback circuit includes a photodiode that forms a photocoupler with the phototransistor, and a signal from the photodiode is supplied to the phototransistor, Signal.

Wherein the low-voltage control unit includes at least one switching control element for switching the low-voltage direct-current input voltage to output the low-voltage direct-current input voltage as the second output voltage; And a constant voltage control unit for keeping the second output voltage constant.

The power supply further includes an overvoltage blocking unit for blocking a DC input voltage of a DC input voltage higher than the allowable level of the low voltage control unit from being supplied to the low voltage control unit.

The power supply further includes a charging unit that stores the supply voltage output from the composite output unit in a battery.

According to the present invention, since the DC power is generated by converting the current flowing through the high-voltage power distribution line into a current source by using the electromagnetic induction method and supplied to the load side, the power can be stably supplied regardless of the magnitude of the current flowing through the high- have. Further, according to the present invention, the convenience of installation is improved by using electromagnetic induction rather than direct contact.

In addition, according to the present invention, since the switching output can be made with respect to a low pressure as well as a high pressure, there is no restriction on the current size from the high voltage distribution line, which is efficient.

1 is a block diagram showing a power supply apparatus for a high voltage distribution line according to an embodiment of the present invention,
FIG. 2 is a view showing an input section, a rectifying section, a high voltage control section, and a synthesized output section of a power supply apparatus for a high voltage distribution line according to an embodiment of the present invention;
3 is a view showing an overvoltage blocking unit, a low-voltage control unit, and a synthesized output unit of a power supply for a high-voltage distribution line according to an embodiment of the present invention, and FIG.
4 is a view showing a charging unit of a power supply unit for a high voltage distribution line according to an embodiment of the present invention.

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms including ordinal, such as second, first, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant description thereof will be omitted.

1 is a block diagram showing a power supply apparatus for a high-voltage distribution line according to an embodiment of the present invention, and Figs. 2 to 4 are diagrams illustrating detailed circuits of respective configurations. The power supply apparatus of the present invention will be described with reference to Fig. 1, and a detailed configuration thereof will be described with reference to Figs. 2 to 4. Fig.

1, a power supply apparatus for a high voltage distribution line according to an exemplary embodiment of the present invention includes an input unit 100, a rectification unit 200, a high voltage control unit 300, a low voltage control unit 500, .

The input unit 100 induces a current from the transformer inductor 10 to the distribution line in an electromagnetic induction manner.

Referring to FIG. 2, the input unit 100 includes an input terminal unit 110 and a switch unit 120. The input terminal portion 110 includes at least one input terminal C / T1 to C / T6 to derive a current from the distribution line. Here, the input terminals C / T1 to C / T6 may be general current transformers. The switch unit 120 includes at least one switch S / W1 to S / W6, and shorts both ends thereof to facilitate detachment of the input terminals C / T1 to C / T6.

When a large current flows through the input terminals C / T1 to C / T6, the cores of the input terminals C / T1 to C / T6 are magnetized, so that the input terminals C / T1 to C / There is a problem that is difficult to separate. However, in the present invention, since the switches S / W1 to S / W6 capable of shorting the input terminals C / T1 to C / T6 are disposed as described above, the input terminals C / T1 to C / It is easy to separate due to demagnetization. To this end, the switches S / W1 to S / W6 of the switch unit 120 are provided in the same number as the number of the input terminals C / T1 to C / T6, Can be arranged to match.

The input unit 100 may further include at least one thermistor TH disposed at an output terminal of the input unit 100. The thermistor TH is a semiconductor element including a secondary temperature coefficient water resistance component, and has a characteristic that the resistance value decreases as the temperature rises. Therefore, the thermistor (TH) has a low resistance due to a low temperature at the time of initial driving, so that it can protect the power supply by performing a function of limiting the initial inrush current.

The rectifying unit 200 rectifies the AC input voltage from the input unit 100 to a DC input voltage.

Referring to FIG. 2, the rectification part 200 includes at least one bridge diode (B / D1 to B / D6). The bridge diodes B / D1 to B / D6 are connected to the output terminals of the input unit 100, respectively, and rectify and rectify the AC input voltage inputted from the input unit 100 to DC.

The rectification part 200 may include at least one electrolytic capacitor for smoothing the full wave rectified DC input voltage. In the embodiment of FIG. 2, the first and second capacitors C1 and C2 perform the function of the electrolytic capacitor. At this time, the capacitances of the electrolytic capacitors C1 and C2 are set so as to correspond to the voltage magnitude from the power distribution line. For example, in a voltage environment of 15Vac to 50Vac, an electrolytic capacitor of 300μF or more can be used to sufficiently perform the smoothing function.

The high voltage controller 300 switches the high voltage DC input voltage to generate the first output voltage when the DC input voltage inputted from the rectifier 200 is a high voltage. The low-voltage control unit 500 switches the low-voltage direct-current input voltage to generate the second output voltage when the direct-current input voltage inputted from the rectifier 200 is in the low-voltage range.

In one embodiment, the high and low voltages of the DC input voltage can be distinguished based on a predetermined reference voltage. For example, when the reference voltage is set to 72 Vdc, the DC input voltage of 72 Vdc or higher can be divided into a high voltage and the DC input voltage of less than 72 Vdc can be divided into a low voltage. In this case, the composite output unit 600 of the present invention can supply either the first output voltage output from the high voltage control unit 300 or the second output voltage output from the low voltage control unit 500 to the load 20 Can supply.

In another embodiment, the high and low voltages of the DC input voltage may be distinguished by sharing a reference voltage band with respect to a predetermined reference voltage band. For example, when the reference voltage band is set to 42Vdc to 72Vdc, the DC input voltage of 42Vdc or higher can be divided into a high voltage and the DC input voltage of 72Vdc or lower can be divided into a low voltage. In this case, the composite output unit 600 of the present invention can synthesize and output the first output voltage and the second output voltage when the DC input voltage is 42Vdc to 72Vdc. The composite output unit 600 outputs the second output voltage as a supply voltage when the DC input voltage is less than 42 Vdc and outputs the first output voltage as the supply voltage when the DC input voltage exceeds 72 Vdc.

The composite output of the composite output unit 600 will be described later.

On the other hand, in the expressions of the "predetermined reference voltage" and the "predetermined reference voltage band", "predetermined" means that the reference voltage or the reference voltage band is set according to the condition of the circuit to be designed.

The high voltage control unit 300 includes a high voltage switching control circuit 310, a high voltage rectifying circuit 320, and a high voltage constant voltage control and feedback circuit 330.

The high-voltage switching control circuit 310 switches the high-voltage direct-current input voltage inputted from the rectifying section 200 to output the direct-current output voltage. The high-voltage rectifying circuit 320 rectifies the direct-current output voltage to generate a first output voltage Output. The high voltage constant voltage control and feedback circuit 330 keeps the first output voltage constant. The high voltage constant voltage control and feedback circuit 330 feeds back the output state of the first output voltage to the high voltage switching control circuit 310 so that switching can be controlled in the high voltage switching control circuit 310.

2, the high-voltage switching control circuit 310 includes a switching control element IC1 for switching a DC input voltage, and a transformer (TF) for converting a switched DC input voltage to a DC output voltage.

The DC input voltage is applied to the VDD terminal 2 of the switching control element IC1 via the first and second resistors R1 and R2 which are the initial driving resistors and is supplied as a pulse through the gate terminal 5 . Here, the switching control element IC1 is set to operate under a high-voltage direct-current input voltage range.

The output voltage in the form of a pulse is applied to the gate of the first switching device Q1 via the third resistor R3 which is the noise attenuation resistance and can switch the drain and the source of the first switching device Q1. The transformer TF connected to the drain of the first switching device Q1 can transfer the primary side power when the first switching device Q1 is turned on and off as the DC output voltage to the secondary side. That is, one of the primary side main windings of the transformer TF may be connected to the drain of the first switching device Q1.

On the other hand, the other primary winding of the primary winding of the transformer TF may be connected to the input terminal of the DC input voltage.

A snubber circuit may be attached to both ends of the primary winding of the transformer (TF). The snubber circuit has a role of attenuating a high spike inverse voltage when the first switching device Q1 is turned on / off, and thus can generate a reverse voltage. In the embodiment of FIG. 2, the first diode D1, the fourth resistor R4, and the third capacitor C3 function as a snubber circuit.

The first switching device Q1 is connected between the source of the first switching device Q1 and GND-A so that the amount of current flowing when the first switching device Q1 is turned on is controlled to control an overcurrent greater than a necessary current. 5 resistor R5 is disposed. The voltage across the fifth resistor R5 is input to the fourth terminal, which is the sense terminal of the first switching control element IC1. This voltage is compared with the internal reference voltage to control the output pulse width of the first terminal, the gate terminal. The fourth capacitor C4 connected to the fourth terminal and the resistor are elements for noise attenuation.

On the other hand, the DC input voltage applied to the second terminal of the first switching control element IC1 through the initial driving resistances R1 and R2 is set such that the voltage generated in the primary side auxiliary winding of the transformer TF ≪ / RTI > One of the primary side auxiliary coils of the transformer TF is connected to GND-A, and the other is connected to the second terminal of the first switching control element IC1. The pulse voltage generated in this auxiliary winding is converted into a DC through the second diode D2 and the sixth resistor R6 and then smoothed by the fifth capacitor C5 which is an electrolytic capacitor to be supplied to the second switching control IC1 Respectively.

The high voltage rectifying circuit 320 includes at least one smoothing diode or smoothing capacitor. Referring to FIG. 2, one of the secondary windings of the transformer TF is connected to GND-B, the other is a pulse transmitted from the primary, and the third, fourth, and fifth diodes D3, D4, and D5. The DC output voltage that has passed through the smoothing diodes D3, D4, and D5 is output only the + voltage, and smoothed through the sixth capacitor C6, which is a smoothing electrolytic capacitor. Here, the seventh resistor R7 and the seventh capacitor C7 function as a snubber circuit for the secondary side back electromotive voltage.

The high voltage constant voltage control and feedback circuit 330 includes a shunt regulator IC IC2 and a photodiode PD. The + DC input voltage outputted through the high-voltage rectifying circuit 320 is input to the shunt adjustment element IC2 through the distribution circuit. In addition, the photodiode PD connected to the cathode of the shunt adjustment element IC2 is driven in accordance with the variation of the DC input voltage.

The photodiode PD functions as a photocoupler together with the switching control circuit 310 for high voltage. For this purpose, the high-voltage switching control circuit 310 may include a phototransistor PT. That is, the signal is transmitted to the phototransistor PT on the primary side according to the driving of the photodiode PD, and feedback control becomes possible.

Specifically, when a current flows in the photodiode PD, it is supplied as a driving signal to the base of the phototransistor PT. Accordingly, the collector and the emitter become conductive, and the internal circuit connected to the seventh terminal, which is the feedback terminal of the first switching control element IC1, is driven to adjust the output pulse width of the first terminal. That is, a signal supplied from the photodiode PD can be used as a feedback signal. At this time, the eighth resistor (R8) performs a voltage dividing function with the internal circuit, and the eighth capacitor (C8) performs a noise removing function. Here, the eighth capacitor may be a ceramic capacitor.

Terminal No. 8, which is the GND terminal of the first switching control element IC1, is connected to GND-A to perform the ground function of the first switching control element IC1.

In the present invention, a high efficiency DC / DC converter having a high power conversion efficiency can be used as the low voltage controller 500 so that the output can be achieved even when the current value flowing through the high voltage distribution line is low.

Next, the low-voltage control unit 500 includes at least one low-voltage switching control unit. The low-voltage switching control section includes a low-voltage switching control element. 3, the low-voltage control unit 500 includes three sets of low-voltage switching control units, and each low-voltage switching control unit may include third, fourth, and fifth switching control elements IC3, IC4, and IC5 have. Each of the low-voltage switching control units performs the same function, and the driving of the third switching control element IC3 will be described below as an example.

The low-voltage DC input voltage inputted through the rectifying section 200 is applied to the Vin terminal of the third switching control element IC3 and is switched. The switched DC input voltage is made to be a constant voltage and output as a second output voltage. The sixth terminal of the third switching control element IC3 is a time constant circuit for determining the switching frequency and is connected to the fourth terminal connected to GND-B via the ninth resistor R9 to set the switching frequency. The VCC terminal No. 7 supplies power to the inside of the device through the internal regulator circuit and the No. 3 terminal is the terminal for the overcurrent control and is connected to the No. 4 terminal through the tenth resistor (R10) to set the maximum value of the output current . The first terminal is a switching output terminal. The pulse output outputted through the first terminal is connected to the ninth capacitor C9 of the first inductor L1, the ninth diode D9 and the bootstrap function Which are coupled to each other to generate an output voltage and an output current. Since the voltage generated here is not a constant voltage, the low-voltage control unit 500 further includes a constant-voltage control unit for making the voltage constant.

In the embodiment of FIG. 3, the fifteenth resistor R15, the sixteenth resistor R16, and the variable resistor VR1 constitute a constant voltage control unit. The switched and outputted voltage is applied to the sixteenth resistor R16 through the fifteenth resistor R15 and then to the fifth terminal which is the feedback terminal of the third switching control element IC3. The feedback voltage is compared with the internal reference voltage of the third switching control element IC3 to control the output pulse so that the output voltage becomes a desired output voltage, thereby outputting the second output voltage that is a constant voltage. At this time, the output pulse width is decreased when the feedback voltage becomes higher than the desired output voltage, and when the feedback voltage is lowered, the output pulse width is increased, thereby maintaining the constant voltage.

In the meantime, in the present invention, when a high current flows in the high-voltage distribution line, a high-voltage direct-current input voltage higher than a permissible magnitude by the low-voltage control unit 500 is supplied to the low-voltage control unit 500, An overvoltage blocking unit 400 may be included.

An embodiment of the over-voltage cut-off 400 is shown in FIG.

Referring to FIG. 3, the DC input voltage between V-in and GND-A is compared with the reference voltage of the shunt regulating element IC6 through the seventeenth resistor R17 and the eighteenth resistor R18. At this time, the reference voltage may be a maximum allowable voltage in the low voltage controller 500. The current does not flow between the anode and the cathode of the shunt adjustment element IC6 until the voltage across the eighteenth resistor R18 exceeds the reference voltage. Therefore, the voltage of the Zener diode ZN is applied to the gate of the second switching device Q2 connected to the cathode of the zener diode ZN through the nineteenth resistor R19, and the source connected to the GND-A and the source connected to the GND- Is maintained in a conductive state. Accordingly, the allowable DC input voltage in the low voltage controller 500 is supplied to the low voltage controller 500 as the bias voltage.

On the other hand, when a high current flows to the high-voltage distribution line and a voltage equal to or greater than the allowable maximum voltage level is input between V-in and GND-A, the voltage across both ends of the eighteenth resistor R18 Voltage is exceeded. Therefore, the anode and the cathode of the shunt adjustment element IC6 are conducted, and the voltage applied to the gate of the second switching element Q2 is also lowered to open the gap between the source connected to GND-A and the drain connected to GND-B. Accordingly, the DC input voltage is cut off from being applied to the low voltage control unit 500, and the second output voltage is also not outputted from the low voltage control unit 500.

The composite output unit 600 outputs at least one of the first output voltage and the second output voltage as a supply voltage as described above.

2 and 3, the composite output unit 600 is connected to the output terminal of the high voltage control unit 300 and the output terminal of the low voltage control unit 500 (610 and 620). The composite output unit 600 includes at least one high voltage side diode D6, D7, and D8 connected to the output terminal of the high voltage control unit 300, at least one low voltage side diode connected to the output terminal of the low voltage control unit 500, (D12, D13, D14). The high-voltage side diodes D6, D7, and D8 and the low-voltage side diodes D12, D13, and D14 prevent current from flowing in opposite directions to each other at the time of output. Accordingly, when only the first output voltage is output through the high voltage control unit 300, the first output voltage is output as the supply voltage through the high voltage side diodes D6, D7, and D8. Further, when only the second output voltage is outputted through the low voltage control unit 500, the second output voltage is outputted through the low voltage side diodes D12, D13 and D14 as the supply voltage. When both of the first and second output voltages are output, the first and second output voltages are supplied to the first and second output voltages by using the high voltage side diodes D6, D7, and D8 and the low voltage side diodes D12, D13, and D14, And outputs it.

The power supply apparatus for the high voltage distribution line according to the embodiment of the present invention includes a charging unit 700 for storing the generated supply voltage in the battery 30 to supply power to the load 20 in an emergency situation such as a power failure, As shown in FIG.

4, the charging unit 700 includes an ADJ regulator IC7 and a voltage distribution resistor R20, VR2, and R21 connected to the output terminal of the supply voltage. . The resistance value of the twentieth resistor R20 is set so that a constant output is maintained by sensing the state of the supply voltage through the variable resistor VR2. At this time, by designing the output voltage of the charger 700 according to the input voltage of the battery 30, the voltage input through the third terminal of the regulator element IC7 is controlled from the first terminal, . If the output voltage exceeds the designed voltage, the output voltage can be lowered by increasing the voltage at terminal 1. Conversely, when the output voltage is lower than the designed voltage, the output voltage is raised by lowering the voltage of the first terminal to maintain the constant voltage.

The amount of current charged into the battery 30 is controlled by the current sensing resistor R22. The current flowing through the battery 30 generates a voltage drop across the resistor R22 for current sensing and this voltage is connected to the base of the transistor TR for controlling the first terminal of the regulator element IC7. Therefore, since the current flowing between the collector and the emitter of the transistor TR is controlled in accordance with the change of the voltage, the output current of the first terminal of the regulator element IC7 connected to the collector is controlled in accordance with the change of the transistor TR. This output current can vary the value of the current sensing resistor R22 variously.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

10: Induction transformer 20: Load
30: battery 100: input part
110: input terminal part 120: switch part
200: rectification part 300: high voltage control part
310: High-voltage switching control circuit 320: High-voltage rectifying circuit
330: Constant-voltage control and feedback circuit for high voltage
400: Overvoltage shutoff unit 500: Low voltage control unit
600: composite output unit 700:

Claims (13)

delete An input part for inducing a current from the high voltage distribution line;
A rectifying unit for rectifying an AC input voltage from the input unit to a DC input voltage;
A high voltage control unit for switching a high voltage direct input voltage inputted from the rectifying unit to generate a first output voltage;
A low voltage control unit for switching a low-voltage direct-current input voltage inputted from the rectifying unit to generate a second output voltage; And
A synthesized output unit for outputting at least any one of the first output voltage and the second output voltage as a supply voltage,
Lt; / RTI >
Wherein the high-voltage direct-current input voltage is a voltage higher than the reference voltage based on a predetermined reference voltage, the low-voltage direct-current input voltage is a voltage lower than the reference voltage,
Wherein the composite output unit outputs the first output voltage generated by the high voltage control unit as the supply voltage when the DC input voltage is the DC input voltage of the high voltage and the DC output voltage is the DC input voltage of the low voltage And outputs the second output voltage generated by the low voltage control unit as the supply voltage.
An input part for inducing a current from the high voltage distribution line;
A rectifying unit for rectifying an AC input voltage from the input unit to a DC input voltage;
A high voltage control unit for switching a high voltage direct input voltage inputted from the rectifying unit to generate a first output voltage;
A low voltage control unit for switching a low-voltage direct-current input voltage inputted from the rectifying unit to generate a second output voltage; And
A synthesized output unit for outputting at least any one of the first output voltage and the second output voltage as a supply voltage,
Lt; / RTI >
Wherein the high-voltage direct-current input voltage is a voltage of the reference voltage or more based on a predetermined reference voltage band, the low-voltage direct-current input voltage is a voltage equal to or lower than the reference voltage,
Wherein the composite output section outputs the first output voltage generated by the high voltage control section as the supply voltage when the DC input voltage exceeds the predetermined reference voltage band and the DC input voltage is higher than the predetermined reference voltage The control unit outputs the second output voltage generated by the low voltage control unit to the supply voltage, and when the DC input voltage is included in the predetermined reference voltage band, the first output voltage and the second output And outputs the combined voltage as the supply voltage.
The method according to claim 2 or 3,
Wherein the input unit comprises:
An input terminal portion including at least one current transformer for inducing a current from the high voltage distribution line; And
And a switch unit including at least one switch corresponding to the current transformer and shorting the current transformer
And a power supply for the high voltage distribution line.
The method according to claim 2 or 3,
Wherein the rectifying unit includes at least one bridge diode connected to an output terminal of the input unit.
6. The method of claim 5,
Wherein the rectifying part includes at least one electrolytic capacitor for smoothing the rectified DC input voltage.
The method according to claim 2 or 3,
The high-
A high-voltage switching control circuit for switching the high-voltage direct-current input voltage to output a direct-current output voltage;
Rectifying circuit for rectifying the DC output voltage and outputting the rectified DC output voltage to the first output voltage; And
A constant voltage control and feedback circuit for maintaining the first output voltage constant and feeding back the output state of the first output voltage to the high voltage switching control circuit;
And a power supply for the high voltage distribution line.
8. The method of claim 7,
The high-voltage switching control circuit includes:
A switching control element for switching the high-voltage direct-current input voltage; And
A transformer for transforming the switched high-voltage direct-current input voltage into the direct-
And a power supply for the high voltage distribution line.
8. The method of claim 7,
Wherein the high voltage rectifying circuit includes at least one smoothing diode or smoothing capacitor.
8. The method of claim 7,
Wherein the high-voltage switching control circuit includes a phototransistor,
The constant voltage control and feedback circuit for high voltage includes a photodiode that forms a photocoupler with the phototransistor,
Wherein a signal from the photodiode is supplied to the phototransistor and used as a feedback signal.
The method according to claim 2 or 3,
The low-
At least one switching control element for switching the low-voltage direct-current input voltage to output the second output voltage; And
A constant voltage control unit for keeping the second output voltage constant;
And a power supply for the high voltage distribution line.
The method according to claim 2 or 3,
Further comprising an overvoltage blocking unit for blocking a DC input voltage of the DC input voltage of at least the allowable level from the low voltage control unit from being supplied to the low voltage control unit.
The method according to claim 2 or 3,
And a charging unit that stores the supply voltage output from the composite output unit in a battery.

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