WO2013089448A1

WO2013089448A1 - Automatic voltage regulator

Info

Publication number: WO2013089448A1
Application number: PCT/KR2012/010832
Authority: WO
Inventors: 금종관
Original assignee: Geum Jong-Gwan
Priority date: 2011-12-13
Filing date: 2012-12-13
Publication date: 2013-06-20
Also published as: KR20130066923A

Abstract

The present invention relates to an automatic voltage regulator. The automatic voltage regulator includes: a transforming unit for regulating input voltage which outputs a decreased or increased voltage by inducing an alternating current (AC) voltage input from the outside and includes a plurality of tabs at the output to allow different voltages to be output depending on the number of coils; a transforming unit for regulating output voltage which is electrically connected directly to the output of the transforming unit for regulating input voltage, and which outputs, to the load side, a voltage input through a decrease or an increase from the transforming unit for regulating input voltage; a switch unit which switches one of a plurality of tabs on the output of the transforming unit for regulating input voltage, and which allows a voltage, which is decreased or increased depending on the turn ratio set to a corresponding tab, to be output to the transforming unit for regulating output voltage; and a control unit which controls the switching of the switching unit to uniformly supply a corresponding voltage to the load side according to the load-side supply voltage set by the user.

Description

Thermostat

The present invention relates to an automatic voltage regulator (AVR).

In general, slidax is used as a voltage regulating device of AC. SLIDAX is a voltage adjusting transformer that can output an output voltage arbitrarily by receiving a constant input power. The output voltage can be adjusted, but the output voltage must be monitored by a person, and the voltage must be adjusted. It is not suitable for power supply of equipment or load requiring stable AC voltage.

Therefore, to solve this problem, special power stabilization devices such as automatic voltage regulators have been developed and used. The automatic voltage regulating device is a device that maintains the output voltage at a constant value. The automatic voltage regulating device is used as an independent device and used independently of an AC generator, a DC generator, a constant voltage rectifier, and the like.

For example, in the case of a generator, the magnetic field current is controlled by detecting a change in the terminal voltage caused by a change in load, speed, etc., and in the case of other devices, the input voltage is detected by detecting a change in the terminal voltage caused by a change in power supply or load. To control.

However, the conventional automatic voltage regulating device as described above is not only complicated power control means and control circuit for stable voltage control, but also expensive large-capacity power conversion transformer, semiconductor switching element, accessory circuit size, product size There is a problem that is difficult to manufacture by miniaturizing the size.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic voltage regulating device for outputting a voltage set by a user to a load side regardless of a single-phase or three-phase voltage change inputted to solve the above problems.

Another object of the present invention is to provide an automatic voltage regulating device for precisely controlling the input single-phase or three-phase voltage by a single volt unit through a plurality of switch controls provided on the input side.

Still another object of the present invention is to provide an automatic voltage regulating device for stably operating by preventing a temporary disconnection of power during switching operation of an input side for automatic voltage adjusting.

It is still another object of the present invention to provide an automatic voltage regulating device capable of miniaturizing equipment by designing a current that flows on the input side to be very small compared to the current flowing on the load side to reduce the winding of the input side coil.

Automatic voltage regulating device according to an embodiment of the present invention for achieving this object, in the automatic voltage regulating device for supplying to the load side by reducing or boosting the input single-phase or three-phase voltage, the AC voltage input from the outside Outputs a reduced or boosted voltage by induction, and a plurality of taps are provided at the output terminal to directly output an input voltage control transformer for outputting different voltages according to the difference in the number of turns of the coil, and an electrical directly to the output terminal of the transformer for input voltage control. Connected, the output voltage control transformer for outputting the input voltage to the load side by decompressing or boosting the voltage in the input voltage control transformer, and one of the plurality of taps provided at the output terminal of the input voltage control transformer for switching the corresponding tap The reduced or boosted voltage is converted to the output voltage control part according to the winding ratio set in A switch unit such that force, and a load side according to the user's load supply voltage set may include a control unit for performing a switching control unit switches so as to supply a constant appropriate voltage.

The automatic voltage regulating device according to an embodiment of the present invention may further include a display unit configured to display an input voltage, an output voltage, a set voltage, and a driving state of the device based on the control of the controller.

In addition, the transformer for input voltage adjustment includes a primary coil that induces an AC voltage input from the outside to the secondary coil, and one end of the primary coil is electrically connected directly to a point inside, and the voltage induced by the primary coil It outputs by reducing or boosting the pressure, a plurality of tabs are provided in the output terminal may include a secondary coil to output a different voltage to the transformer for output voltage control according to the difference in the number of windings of the coil.

The taps provided at the output end of the secondary coil may have a number of turns capable of reducing or boosting the voltage in steps of 1 to 2 volts based on the tap for outputting the reference voltage at the center of the input end of the secondary coil. It is preferable to be provided one by one.

The output voltage regulating transformer is directly connected to the output terminal of the input voltage regulating transformer, the tertiary coil receives the reduced or boosted voltage from the input voltage regulating transformer, and the reduced or boosted voltage input to the tertiary coil. It may include a fourth coil to induce a voltage to output to the load.

And it is preferable that the switch part is comprised by the number of switches corresponding to the some tap provided in the output terminal of the transformer for input voltage regulation.

As described above, according to the automatic voltage regulating device of the present invention, a plurality of taps are made in the unit of a single volt in the input side coil, and switch control is performed according to the user's set voltage to transfer the reduced or boosted voltage in the unit of volt to the load side. By outputting, it is possible to stably output the set voltage to the load side while preventing the temporary disconnection of power during the switching operation on the input side.

In addition, since the current flowing to the input side can be designed to be very small compared with the current output to the load side, unlike the conventional automatic voltage regulating device, the coil winding on the input side can be greatly reduced, and thus the equipment can be made small. Therefore, there is an effect that can greatly increase the economics and availability.

In addition, even if the input voltage is unbalanced, stable voltage is output to the load side, so when applied to a power production system using solar, wind, etc., in which the variation of the input voltage is large, the output voltage can be smoothed and the system can be operated stably. There is.

1 is a view schematically showing the configuration of an embodiment of an automatic voltage regulating device according to the present invention.

2 is a flowchart showing in detail the operation of the automatic voltage regulating device according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the automatic voltage regulating device of the present invention.

As shown, the automatic voltage regulating apparatus of the present invention includes an input voltage adjusting transformer 10, an output voltage adjusting transformer 20, a switch unit 30, a controller 40, a display unit 50, and the like. .

The input voltage regulating transformer 10 induces an AC voltage input from the outside to output a reduced or boosted voltage to the output voltage regulating transformer 20, and a plurality of tabs are provided at the output terminal so as to vary the number of turns of the coil. Accordingly, different voltages are outputted to the output voltage adjusting transformer 20.

The transformer 10 for input voltage control has a primary coil 12 for inducing an AC voltage input from the outside to the secondary coil 14, and one end of the primary coil 12 is directly electrically connected to a point inside. It is connected and outputs by reducing or boosting the voltage induced by the primary coil 12, and a plurality of taps are provided at the output terminal, so that different voltages are output to the voltage adjusting part 20 according to the difference in the number of windings of the coil. It consists of a secondary coil 14 to be output.

At this time, as in the present invention, one end of the primary coil 12 is electrically connected directly to a point inside the secondary coil 14 (in FIG. 1, one end of the primary coil 12 is connected to the secondary coil 14). When shown in the center of the wiring), the winding of the output coil is unnecessary, which should be basically used in a conventional automatic voltage regulating device is reduced, so that the equipment can be made compact. Because the transformer used in the conventional automatic voltage regulating device is configured to induce the voltage applied from the input coil without directly connecting the output coil to the input coil electrically, so the coil winding on the output side can not be reduced as in the present invention, and thus the size is reduced. This is because there is a limit to the production.

The tap provided at the output end of the secondary coil 14 of the transformer 10 for input voltage regulation may include a tap (for example, the primary coil 12) for outputting a reference voltage at the center of the input end of the secondary coil 14. The tap is a point at which a voltage equal to the voltage applied to the secondary coil 14 is induced, and even if the voltage applied to the primary coil 12 is an unstable voltage around 220V, the secondary coil 14 always has a voltage of 220V. Voltage is reduced or boosted in units of 1V to 2V (in this case, 1V to 2V, but not limited to this, but can be determined in various ranges according to the environment) based on the voltage induced). One is provided for each position with the number of turns possible.

The output voltage adjusting transformer 20 is electrically connected directly to the output terminal of the input voltage regulating transformer 10, and outputs the input voltage by reducing or boosting the voltage at the input voltage regulating transformer 10.

The output voltage adjusting transformer 20 is electrically connected directly to the output terminal of the input voltage adjusting transformer 10, and the tertiary coil 22 receiving the reduced or boosted voltage from the input voltage adjusting transformer 10. And a fourth coil 24 that induces a reduced or boosted voltage input to the tertiary coil 22 and outputs it to a load.

The output voltage regulating transformer 20 is electrically connected to the input power line, so that the input voltage regulating transformer 10, the output voltage regulating transformer 20, and the load are short regardless of the operation of the switch unit 30. Since the state is maintained, it is possible to stably supply the set voltage to the load side while preventing the temporary disconnection of power during the switching operation of the switch unit 30 provided at the output terminal of the input voltage adjusting transformer 10.

The switch unit 30 is composed of a number of switches corresponding to a plurality of taps provided at the output terminal of the transformer 10 for input voltage regulation, the transformer for input voltage regulation according to the switching control signal input from the controller 40 One of the plurality of taps provided in the output terminal of the unit 10 is switched so that the reduced or boosted voltage is output to the output voltage adjusting transformer 20 according to the winding ratio set in the corresponding tab.

At this time, if the switch unit 30 is configured at the output terminal of the input voltage control transformer 10, the current flowing through the input voltage control transformer 10 is very small compared to the current flowing through the output voltage control transformer 20. Since it is possible to design, it is possible to reduce the winding of the transformer 10 for the input voltage control, thereby making it possible to manufacture a miniature automatic voltage control equipment.

The controller 40 generates a control signal for switching a specific switch of the switch unit 30 to supply a corresponding voltage to the load side according to the load side supply voltage setting of the user, and converts the generated switching control signal into the switch unit 30. )

The display unit 50 displays the current input voltage, the output voltage supplied to the load side, the set voltage set by the user, the driving state of the device, and the like based on the control of the controller 40, so that the user Make it easy to check the status.

On the other hand, although not shown in the drawings, the automatic voltage regulating device according to the present invention can be used by extending the single-phase automatic voltage regulating device of FIG. That is, according to the user's load-side supply voltage setting, the AC voltage of each phase of R, S, and T applied from the outside is supplied to the load side constantly based on the switch control for each phase.

Next, an operation process of an embodiment of the automatic voltage regulating device according to the present invention configured as described above will be described in detail with reference to FIG. 2.

First, when the power of the automatic voltage regulator is turned on, the controller 40 initializes the device (S10).

After initialization of the device, the controller 40 determines whether the voltage output to the load side is set according to a predetermined panel manipulation provided in the automatic voltage regulating device by the user (S20).

As a result of the determination, when the voltage outputted to the load side is set according to the user's operation, the controller 40 reduces or boosts the AC voltage input from the outside to the output voltage adjusting transformer 20 according to the winding ratio and outputs the voltage to the input voltage adjusting transformer. It is checked whether any one of the plurality of taps provided at the output terminal of the unit 10 is switched (S30). That is, to check the specific switch for outputting the voltage set by the user to the output voltage adjusting transformer 20.

After checking the specific tap outputted to the output voltage adjusting transformer 20 by decompressing or boosting the voltage set by the user through the step S30, the controller 40 generates a control signal for switching the corresponding tap and generates the generated tap. The switching control signal is output to the switch unit 30 so that the corresponding tap is switched (S40).

Accordingly, the voltage set by the user is reduced or increased in the input voltage regulating transformer 10 according to the switching operation of the switch unit 30. The voltage is stably output to the load side through the output voltage regulating transformer 20. In this case, the current flowing through the input voltage adjusting transformer 10 is relatively small compared to the current flowing through the output voltage adjusting transformer 20 (for example, about 450 A when the input power is 220 V). Since approximately 40A) flows, the voltage can be easily adjusted. Accordingly, unlike the conventional automatic voltage regulating device, it is possible to greatly reduce the winding of the transformer 10 for input voltage regulation, thereby making the equipment compact.

On the other hand, if the voltage supplied to the load is not set according to the user's manipulation as a result of the above-described step S20, the controller 40 controls the automatic voltage regulating device to be driven in the previously set state (S50). In this case, the control unit 40 may control to be driven in a basic setting state (for example, a state in which 220V input power is output to the load side) in addition to the method of controlling the automatic voltage regulating device to be driven in a previously set state. .

Herein, while the present invention has been described with reference to the preferred embodiments, those skilled in the art will variously modify the present invention without departing from the spirit and scope of the invention as set forth in the claims below. And can be changed.

The present invention can stably output the set voltage to the load side while preventing the temporary disconnection of power during the switching operation of the input side, and unlike the conventional automatic voltage regulating device, it is possible to significantly reduce the coil winding on the input side. Therefore, since the equipment can be manufactured in a small size, it is possible to greatly increase the economic efficiency and availability, and when applied to a power production system using solar or wind with large fluctuations in the input voltage, the output voltage can be smoothed to operate the system stably. Can be.

Claims

In the automatic voltage regulating device for supplying to the load side by reducing or boosting the voltage of the single phase or three phase input,

A transformer for input voltage regulation for outputting a reduced or boosted voltage by inducing an AC voltage input from the outside, and having a plurality of tabs provided at an output terminal to output different voltages according to a difference in the number of turns of the coil;

An output voltage control transformer which is electrically connected directly to an output terminal of the transformer for voltage control, and outputs the input voltage to the load side by reducing or boosting the voltage at the transformer for voltage control;

A switch unit configured to switch one of the plurality of taps provided at the output end of the input voltage adjusting transformer part to output the reduced or boosted voltage to the output voltage adjusting transformer part according to the winding ratio set at the corresponding tab;

A control unit for performing switching control of the switch unit to supply a corresponding voltage to the load side according to the load side supply voltage setting of the user.

Including automatic voltage regulating device.
The method of claim 1,

And a display unit configured to display an input voltage, an output voltage, a set voltage, and a driving state of the device based on the control of the controller.
The method of claim 1,

The transformer for the input voltage adjustment,

Primary coil to induce AC voltage input from outside to secondary coil, and

One end of the primary coil is electrically connected directly to one point inside, and outputs the voltage induced by the primary coil by reducing or increasing the voltage, and a plurality of tabs are provided at the output terminal according to the difference in the number of turns of the coil. Automatic voltage regulating device comprising a secondary coil to allow different voltages to be output to the output voltage adjusting transformer.
The method of claim 3, wherein

The tab provided at the output end of the secondary coil,

Automatic voltage regulating device is provided for each position having a number of windings to reduce or boost the voltage in steps of 1 to 2 volts based on the tap for the reference voltage output of the center of the input terminal of the secondary coil.
The method of claim 1,

The output voltage adjusting transformer part,

A tertiary coil electrically connected directly to an output end of the input voltage adjusting transformer part and receiving a reduced or boosted voltage from the input voltage adjusting transformer part; and

Automatic voltage regulating device comprising a fourth coil to induce a reduced pressure or a boosted voltage input to the third coil to output to the load.
The method of claim 1,

The switch unit,

Automatic voltage regulating device comprising a number of switches corresponding to the plurality of taps provided at the output terminal of the transformer for the input voltage adjustment.