EP2275893A2 - Automatic voltage regulator - Google Patents

Automatic voltage regulator Download PDF

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Publication number
EP2275893A2
EP2275893A2 EP09738922A EP09738922A EP2275893A2 EP 2275893 A2 EP2275893 A2 EP 2275893A2 EP 09738922 A EP09738922 A EP 09738922A EP 09738922 A EP09738922 A EP 09738922A EP 2275893 A2 EP2275893 A2 EP 2275893A2
Authority
EP
European Patent Office
Prior art keywords
voltage
switch
input
field winding
level
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09738922A
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German (de)
English (en)
French (fr)
Inventor
Myung Hwan Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CSKK(HKG) Ltd
LEE, MYUNG HWAN
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020080040180A external-priority patent/KR101000321B1/ko
Application filed by Individual filed Critical Individual
Publication of EP2275893A2 publication Critical patent/EP2275893A2/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/14—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices

Definitions

  • the present invention relates to an automatic voltage regulator, particularly to an automatic voltage regulator capable of precisely controlling an output voltage level by using a toroidal autotransformer.
  • An automatic voltage regulator using a toroidal autotransformer can be implemented using various regulator windings. However, the output voltage of such a regulator is always determined by the winding of its primary and secondary coils. Thus, in order to output various voltages, an automatic voltage regulator using a toroidal autotransformer is designed to wind coils according to the desired voltage or have several output taps.
  • an autotransformer can be designed to have a plurality of taps (a, b, c) on a field winding (200) excited in a main winding (100) so as to output various voltage levels. If the toroidal autotransformer is so designed that in case where 220V is applied to the main winding (100), 20V is applied to both ends of the main winding (100) and each tap of the field winding (200) reduces the voltage by 5V, the toroidal autotransformer can supply 200V from the first tap (a), 205V from the second tap (b), and 210V from the third tap (a), to an output terminal.
  • conventional automatic voltage regulators supply discrete output voltages with a large deviation between the voltages. For example, in the example as described above, each of the output voltages with a deviation of 5V, i.e., each of 200V, 205V and 210V is selectively supplied. Accordingly, conventional automatic voltage regulators cannot provide precise voltage control.
  • a distribution board In the case of a high-story apartment, a distribution board is installed in a basement. About 235V is supplied to the first floor, but the supply voltage decrease as the floor gets higher, and as a result, about 205V is supplied to the 15 th floor.
  • an electronic appliance can operate in a stable manner when a voltage of 205V is supplied.
  • a power saving device which decreases the voltage by about 10V, it is not ensured that a house supplied with a voltage of 215V or lower will obtain at least the minimum voltage required for providing stable operation, 205V, due to the use of an inappropriate power saving device.
  • the highest floor it is necessary to increase the voltage level so that a stable voltage can be supplied in a consistent manner.
  • the present invention solves the problems of conventional technology; the present invention provides an automatic voltage regulator capable of precisely controlling the voltage level and thereby of supplying an appropriate voltage.
  • the automatic voltage regulator of the present invention has a simple structure which does not use a power semiconductor circuit, and thus can control voltage precisely regardless of electricity environment.
  • the reason for the technical limitation is because a very limited range of winding methods have been used for a toroidal core.
  • a main winding is wound on a toroidal core, and then a coil of a certain thickness is wound on the main winding to form field windings where input/output taps are formed.
  • a non-conductive coil is inserted between the main winding and field windings of a toroidal core, problems occur such as generation of fumes from the inserted coil.
  • this process only field windings serially connected by taps and a main winding are used.
  • the present invention is to improve such a winding method for conventional toroidal cores and thereby to output various levels of inductive voltages.
  • the present invention was conceived to solve said problems of conventional technology.
  • the objective of the present invention is to provide an automatic voltage regulator capable of outputting continuous voltage levels and thereby of controlling voltage precisely.
  • an automatic voltage regulator for converting an input voltage applied to an input terminal and outputting the converted input voltage to an output terminal according to the present invention, comprising: a main winding unit having one end thereof connected to the input terminal and the other end thereof connected to the output terminal, and having a plurality of main windings and a plurality of first switches for switching so that the plurality of main windings are selectively serially connected; a field winding excited in at least one of the main windings connected serially by the first switches of the main winding unit; a second switch for selectively connecting one end of the field winding to either a reference potential or the output terminal; a third switch for connecting the other end of the field winding to either the reference potential or the input terminal; and a control unit which regulates the level of an output voltage output to the output terminal by switching control of the plurality of first switches, the second switch, and the third switch.
  • said automatic voltage regulator of the present invention further comprises a level measurement unit for measuring the level of the input voltage inputted to the input terminal, and wherein the control unit is configured to be able to: if a predetermined target voltage is higher than the level of the input voltage measured by the level measurement unit, switch control the plurality of first switches in response to a voltage difference between the predetermined target voltage and the measured level of the input voltage, control the second switch to connect the one end of the field winding to the reference potential, and control the third switch to connect the other end of the field winding to the input terminal, and if the predetermined target voltage is lower than the level of the input voltage, switch control the plurality of first switches in response to the difference between the predetermined target voltage and the measured level of the input voltage, control the second switch to connect the one end of the field winding to the output terminal, and control the third switch to connect the other end of the field winding to the reference potential.
  • said automatic voltage regulator of the present invention may further comprise a user input unit for inputting the predetermined target voltage from the user.
  • said automatic voltage regulator of the present invention further comprises a bypass path for causing the input voltage to bypass the main winding unit; and a bypass switch for switching a connection condition for the bypass path, and wherein if the level of the input voltage corresponds to the predetermined target voltage, the automatic voltage regulator is configured to turn on the bypass switch to cause the input voltage to bypass the main winding unit.
  • the field winding is wound on a toroidal core
  • the plurality of main windings wind the field winding
  • the plurality of main windings are wound on the toroidal core so as not to overlap.
  • an automatic voltage regulator for converting an input voltage inputted to an input terminal to output the converted input voltage to an output terminal, comprising: a main winding unit having one end thereof connected to the input terminal and the other end thereof connected to the output terminal, and having a plurality of main windings and a plurality of first switches for switching so that the plurality of main windings are selectively serially connected; a field winding excited in at least one of the main windings connected serially by the first switches of the main winding unit; and a control unit which regulates the level of an output voltage output to the output terminal by switching control of the plurality of first switches, the second switch, and the third switch.
  • the automatic voltage regulator further comprises a level measurement unit for measuring the level of an input voltage inputted to the input terminal, and if the predetermined target voltage is lower than the level of the input voltage, the control unit switch controls the plurality of first switches in response to a voltage difference between the target voltage and the measured level of the input voltage.
  • the automatic voltage regulator of the present invention further comprises a bypass path to cause the input voltage to bypass the main winding unit; and a bypass switch for switching a connection condition for the bypass path, and if the level of the input voltage corresponds to the predetermined target voltage, the automatic voltage regulator is configured to turn on the bypass switch to cause the input voltage to bypass the main winding unit.
  • Fig. 2 is a schematic drawing of the internal structure of the automatic voltage regulator according to the first embodiment of the present invention.
  • the automatic voltage regulator is configured to comprise a main winding unit (1) having a plurality of main windings (1a 0 ⁇ 1a n ) and a plurality of first switches (1b 0 ⁇ 1b n ), a field winding (2), a second switch (3), a third switch (4), a bypass switch (5), a level measurement unit (6), an input unit (7) and a control unit (8).
  • the main winding unit (1) has one end connected to an input terminal (L1) to which an input voltage applies and the other end connected to an output terminal (L2).
  • the circuit connection between both ends is determined according to how the plurality of first switches (1b 0 ⁇ 1b n ) are switch connected. That is, as illustrated, depending on whether the first switches (1b 0 ⁇ 1b n ) are connected to one end of the main windings (1a 0 ⁇ 1a n ), it is determined whether the corresponding main windings (1a 0 ⁇ 1a n ) are comprised as one element of a serial circuit connecting both ends of the main winding unit (1).
  • serial mode where the first switches (1b 0 ⁇ 1b n ) are connected to one end of the main windings (1a 0 ⁇ 1a n ) so that the main windings (1a 0 ⁇ 1a n ) become one part of the serial circuit to increase the total number of main windings
  • insulating mode where the main windings (1a 0 ⁇ 1a n ) are insulated from the serial circuit.
  • the main windings (1a 0 ⁇ 1a n ) comprised in the serial circuit which connects both ends of the main winding unit (1) can be selected, and thereby the total number of main windings comprised in the serial circuit can be controlled.
  • the total number of main windings of the serial circuit between both ends of the main winding unit (1) can be regulated so as to correspond to a natural number within expressible range. For example, if n is 10, the number of main windings can be regulated to have turns corresponding to any natural number between 1 ⁇ 2047.
  • the field winding (2) is excited in the main windings (1a 0 ⁇ 1a n ) serially connected between both ends of the main winding unit (1). Therefore, the turns of the field winding (2) are fixed, but the level of voltage at which to excite the field winding (2) varies depending on the total number of main windings comprised in the serial circuit of the main winding unit (1).
  • the second switch (3) is designed to selectively connect one end (2a) of the field winding (2) to either a reference potential (N) or the output terminal (L2), and in this connection, the third switch (4) is designed to selectively connect the other end (2b) of the field winding (2) to either the reference potential (N) or the input terminal (L1).
  • the third switch (4) is inevitably switched to connect the other end (2b) of the field winding (2) to the reference potential (N).
  • the second switch (3) is switched to connect one end (2a) of the field winding (2) to the reference potential (N)
  • the third switch (4) is inevitably switched to connect the other end (2b) of the field winding (2) to the input terminal (L1).
  • addition mode an inductive voltage formed in the field winding (2) is added to the input voltage
  • subtraction mode a mode where the inductive voltage is subtracted from the input voltage
  • the bypass switch (5) is configured to directly connect the input terminal (L1) to the output terminal (L2) or insulate the input terminal (L1) from the output terminal (L2), and provides a path for bypassing for the input voltage when a user attempts to output the input voltage without change.
  • the level measurement unit (6) is configured to measure the level of voltage inputted through the input terminal (L1), and a peak value, or an rms value, is measured and output.
  • the input unit (7) is configured to receive a target voltage from a user that the user attempts to output, and is variously implemented as a panel where an input switch such as an up-down key is formed, a receiving device for receiving a remote control instruction, etc.
  • the target voltage may be a value stored as default or previously inputted by the user, or a value newly revised during operation.
  • the control unit (8) compares the input voltage measured at the level measurement unit (6) and the target voltage, and performs switching control operation of the first-third switches (1b 0 ⁇ 1b n , 3, 4) and bypass switch (5) to adjust the input voltage to the target voltage.
  • ⁇ stable 1> shows experimental data showing how the total turns of the main winding unit (1) are determined as the input voltage is inputted between 187V and 220V under the condition where the turns of the field winding (2) are fixed at 500T and the target voltage is set to 220V.
  • the control unit (8) controls the first-third switches and bypass switch (5) to cause the input voltage to be subtracted for output.
  • control unit (8) turns off the bypass switch (5), controls the second switch (3) to connect one end (2a) of the field winding (2) to the output terminal (L2), and controls the third switch (4) to connect the other end (2b) of the field winding (2) to the reference potential (N).
  • the control unit (8) regulates the level of the inductive voltage of the field winding (2), which is the size of subtracted voltage, so as to compensate the difference between the level of the input voltage measured at the level measurement unit (6) and the target voltage.
  • the control unit (8) calculates the total turns of the main winding unit (1) that can induce the voltage corresponding to the voltage difference, and controls the first switches (1b 0 ⁇ 1b n ) so that the main windings (1a 0 ⁇ 1a n ) to be combined according to the calculation form a serial circuit. That is, the control unit (8) selectively switch controls the corresponding first switches (1b 0 ⁇ 1b n ) in the serial mode or insulating mode so that the combination of main windings corresponds to the total calculated turns.
  • the number of main windings to be required is proportional to the absolute value of the difference between the target voltage and the input voltage. Therefore, whether the input voltage is higher or lower than the target voltage merely relates to the switching mode of the second switch (3) and the third switch (4), but is not a factor that modifies the number of main windings to be required.
  • ⁇ Table 1> shows that the voltage difference of less than 1V as well as the difference of 1V unit can be compensated, and it may vary depending on the turns and core capacity of the field winding (2). Therefore, the control unit (8) stores data on the voltage difference and the number of main windings to be required according to specifications in advance, and based on the stored data, the control unit (8) can selectively switch control the first switches (1b 0 ⁇ 1b n ) to serial mode or insulating mode.
  • turns of the field winding (2) may not be fixed. In this case, it is necessary to properly select the number of turns for the main windings and field windings, which may be experimentally determined in advance.
  • the number of turns of the main windings is not determined in advance according to the voltage difference, it is possible to increase or decrease the turns serially connected after measuring the level of the output voltage and evaluating the measured value to find the appropriate turns.
  • the automatic voltage regulator of the present invention can provide rated voltage by automatically boosting input voltage.
  • the present invention can selectively boost or reduce the output voltage by switching the second switch (3) and the third switch (4), and greatly improve the extent of boosting and reducing by switching the first switches (1b 0 ⁇ 1b n ).
  • Fig. 3 is a schematic drawing of the circuit of the automatic voltage regulator according to the second embodiment of the present invention, which is almost the same internal structure as in Fig. 2 .
  • Fig. 3 is a schematic drawing of the circuit of the automatic voltage regulator according to the second embodiment of the present invention, which is almost the same internal structure as in Fig. 2 .
  • one end of the field winding is fixedly connected to the output terminal, and the other end is fixedly connected to the reference potential.
  • the automatic voltage regulator of Fig. 3 is used only for reducing the input voltage or allowing it a bypass, but cannot be used for boosting the input voltage.
  • the automatic voltage regulator of the second embodiment is the same as that of the first embodiment, in that it is capable of operation in the aforementioned subtraction mode and precise control down to 1 [V].
  • Fig. 4 and Fig. 5 are schematic diagrams for explaining the windings of a toroidal transformer according to the first and second embodiments of the present invention.
  • the field winding (2) is wound so as to be distributed all over a toroidal core first.
  • a plurality of main windings (1a 0 ⁇ 1a n ) are wound on the field winding (2), i.e., coils are wound to cover the field winding (2) so as not to overlap.
  • Each of the main windings (1a 0 ⁇ 1a n ) is configured to have a starting point and terminating point of the winding, and the plurality of main windings (1a 0 ⁇ 1a n ) are counted and distinguished by the unit consisting of the starting point and terminating point.
  • the main windings (1a 0 ⁇ 1a n ) are distributed and wound on the field winding (2) so as not to overlap, and thus it can obtain various levels of output voltage, which provides a wide choice of selections compared to conventional toroidal transformers.
  • the present invention has precise voltage control to enable the output of the voltage level desired by the user, and precisely carries out a variety of applications of power saving and voltage booster.
  • the present invention can boost/reduce the input voltage to provide a desired target voltage within an error range of 1 volt or less.
  • the present invention comprises a simple relay switching circuit and excludes semiconductor switching devices, thereby being capable of operating adaptively in different system environments without an additional modification.
  • the present invention does not form many output tabs or auxiliary coils, and can regulate the voltage in a broader range, and at the same time can accurately output any values within the voltage regulation band.
  • the first switch of the present invention is to flexibly determine the turns of the main windings serially connected within a circuit, and thus can be placed at different positions unlike from the positions in Fig. 2 and Fig. 3 .
  • the winding of the main windings can be selectively modified.
  • the present invention must be interpreted to include all cases where the first switch is arranged to determine the final turns of the main windings, and such modifications must be understood to be within the scope of the present invention.
  • the present invention can be usefully applied to all electronic equipment requiring a stable voltage.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Electrical Variables (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Ac-Ac Conversion (AREA)
  • Control Of Eletrric Generators (AREA)
EP09738922A 2008-04-30 2009-04-07 Automatic voltage regulator Withdrawn EP2275893A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020080040180A KR101000321B1 (ko) 2008-02-18 2008-04-30 자동전압조정기
PCT/KR2009/001772 WO2009134016A2 (ko) 2008-04-30 2009-04-07 자동전압조정기

Publications (1)

Publication Number Publication Date
EP2275893A2 true EP2275893A2 (en) 2011-01-19

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EP09738922A Withdrawn EP2275893A2 (en) 2008-04-30 2009-04-07 Automatic voltage regulator

Country Status (8)

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EP (1) EP2275893A2 (ru)
JP (1) JP4729715B2 (ru)
CN (1) CN201993666U (ru)
AU (1) AU2009243376B2 (ru)
CA (1) CA2722764A1 (ru)
RU (1) RU2459233C2 (ru)
WO (1) WO2009134016A2 (ru)
ZA (1) ZA201008386B (ru)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102035361B (zh) * 2010-12-13 2013-01-09 中国神华能源股份有限公司 电压调节装置
CN103474997A (zh) * 2013-08-20 2013-12-25 上海宁邦电气有限公司 一种系统节电优化电能自动调节电压稳压设备
KR102008259B1 (ko) * 2017-04-28 2019-08-07 금종관 자동 전압 조절 장치

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Publication number Priority date Publication date Assignee Title
SU433460A1 (ru) * 1969-09-29 1974-06-25 Е.Г. Захарова , Н.В. Захаров РЕГУЛЯТОР ПЕРЕМЕННОГО ТОКА ,ВПТБл <f^,^f• VfR"^?^? S:i«ainyi
SU665384A1 (ru) * 1976-06-03 1979-05-30 Предприятие П/Я В-2775 Регулируемый преобразователь переменного напр жени в посто нное
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JP2996377B2 (ja) * 1993-07-10 1999-12-27 永田 勝彦 交流入力電圧に応じて単巻変圧器の降圧比を制御する装置
JP3416809B2 (ja) * 1994-05-27 2003-06-16 成勲 井本 電気調整器
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JPH10135051A (ja) * 1996-10-25 1998-05-22 Taisei:Kk 単巻変圧器の降圧比制御装置
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JP3400960B2 (ja) * 1999-08-31 2003-04-28 株式会社睦電気製作所 自動電圧制御装置
JP2006187102A (ja) * 2004-12-27 2006-07-13 Ntt Data Ex Techno Corp 交流電圧制御装置
KR20060117560A (ko) * 2005-05-11 2006-11-17 엘에스산전 주식회사 전압 변동 장치

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Also Published As

Publication number Publication date
ZA201008386B (en) 2012-02-29
WO2009134016A3 (ko) 2009-12-10
AU2009243376A1 (en) 2009-11-05
JP2010537614A (ja) 2010-12-02
CA2722764A1 (en) 2009-11-05
WO2009134016A2 (ko) 2009-11-05
RU2010145227A (ru) 2012-06-10
RU2459233C2 (ru) 2012-08-20
AU2009243376B2 (en) 2013-02-07
JP4729715B2 (ja) 2011-07-20
CN201993666U (zh) 2011-09-28

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