JPS5850017A - Voltage adjusting device for inductive load - Google Patents
Voltage adjusting device for inductive loadInfo
- Publication number
- JPS5850017A JPS5850017A JP56148203A JP14820381A JPS5850017A JP S5850017 A JPS5850017 A JP S5850017A JP 56148203 A JP56148203 A JP 56148203A JP 14820381 A JP14820381 A JP 14820381A JP S5850017 A JPS5850017 A JP S5850017A
- Authority
- JP
- Japan
- Prior art keywords
- load
- voltage
- inductive load
- detector
- inductive
- 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.)
- Pending
Links
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
- G05F1/40—Regulating voltage or current wherein the variable actually regulated by the final control device is AC using discharge tubes or semiconductor devices as final control devices
- G05F1/44—Regulating voltage or current wherein the variable actually regulated by the final control device is AC using discharge tubes or semiconductor devices as final control devices semiconductor devices only
- G05F1/45—Regulating voltage or current wherein the variable actually regulated by the final control device is AC using discharge tubes or semiconductor devices as final control devices semiconductor devices only being controlled rectifiers in series with the load
- G05F1/455—Regulating voltage or current wherein the variable actually regulated by the final control device is AC using discharge tubes or semiconductor devices as final control devices semiconductor devices only being controlled rectifiers in series with the load with phase control
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は誘導性負荷例えに誘導加熱や誘導炉等へ一定
の負荷電圧を供給する電圧＊＊装置に−するものである
Ｃ
従来この穏装置として第１図に示すものがあつ＊、ｏ纂
１１１において、（１）は負荷電力を制御する複数のす
イリスタからなるサイリスタ装置、（２）は突入電流を
抑制する厘判りアクドル、（３）は負荷の力率を改善す
るコンデンサ装置で、固定コンデンサ（３ｂ）と力率調
整のための可変コンデンサ（３ａ）とで構成されており
、（ａ） 、 （ｂ１点以降の負荷ａ１路（ムＷ）は並
列共ｔ＆回路（以下タンク回路と称す）を構成する◎
以上の構成において、誘導性負荷の電源からみた力率が
悪い場合、タンク回路の力率が１．０になるよう可変コ
ンデンサ（３ｍ）を投入し力率を改善し、サイリスタ装
置（１）の点弧位相制御角を制御し負荷へ所定の電圧を
供給する〇
しかし電源電圧（ｖｌ）が低下した場合、サイリスク装
置（１）の点弧位相制御角を制御、しても負荷電圧（ｖ
ｓ）は電源電圧（ｖｌ）以上に表９得ないため負荷電力
が電圧の２乗で低下し負荷の稼動率が下がシ、生童性が
低下する等欠点があつ九〇
この発明は以上のような従来のもＯの欠点を除去する丸
めなされたもので、電源電圧が低下しても誘導性負荷へ
所定の電圧を供給することができる電圧調整装置を提供
することを目的とする。[Detailed Description of the Invention] The present invention is directed to a voltage** device for supplying a constant load voltage to an inductive load such as induction heating or an induction furnace. In Monogatatsu*, O-English 111, (1) is a thyristor device consisting of a plurality of styristors that controls load power, (2) is an easy-to-understand accelerator that suppresses inrush current, and (3) is a thyristor device that controls load power factor. This capacitor device is composed of a fixed capacitor (3b) and a variable capacitor (3a) for power factor adjustment. Configure the circuit (hereinafter referred to as tank circuit) ◎ In the above configuration, if the power factor seen from the inductive load power source is poor, insert a variable capacitor (3 m) so that the power factor of the tank circuit becomes 1.0. Improve the power factor, control the firing phase control angle of the thyristor device (1), and supply the specified voltage to the load. However, if the power supply voltage (vl) decreases, the firing phase control of the thyristor device (1) Even if the angle is controlled, the load voltage (v
Since s) cannot be obtained above the power supply voltage (vl), the load power decreases as the square of the voltage, and there are disadvantages such as a decrease in the load operating rate and a decrease in the performance of the load. It is an object of the present invention to provide a voltage regulator which eliminates the drawbacks of conventional voltage regulators such as the above, and which can supply a predetermined voltage to an inductive load even if the power supply voltage decreases.
以下第２図に示すこの発明の一実施例について説明する
。第２図において１８１図と異なるところは前述のタン
ク回路が進み力率になるようコンデンサ装置（３）を設
定すると共に計器用変圧器からなる負荷電圧検出器（６
）を設けた点である０タンク回路が進み力率の場合にお
ける電源電圧（ｖｌ）を基準にしたベクトル図は第３図
に示さｎるようになるｐ第３図におけるＶＢ ＋ Ｖｚ
はそれぞれ第２図中の（ｖｌ）・（Ｖりと同一である０
（ｖＬ）は負荷電流Ｉにより直列リアクトル（２）に生
じる電圧降下でありｓ ＶＬはＩに対して約９Ｏｆ位相
が進んでいる０このため、第３図の如く負荷電圧は常に
電源電圧よりも高くなる０電源電圧の変動のない通常時
には、サイリスタ装置（１）の位相制御を行なわず全点
弧状態とすれば、負荷電圧は負荷の定格電圧よりも高く
なる次め、サイリスタ装置（１）の点弧位相を制御して
定格電圧にする０電源電圧が変動した場合、％に降下し
九場合でも、負荷電圧検出器（６）Ｋより負荷電圧を検
出し、その検出信号はサイリスタ装置（１）Ｋ送らｎ負
荷電圧が一定に保つように制御さｎる０卸ち点弧位相制
御角が通常エフも進む工う制御さｎ。An embodiment of the present invention shown in FIG. 2 will be described below. The difference in Fig. 2 from Fig. 181 is that the capacitor device (3) is set so that the tank circuit described above advances and the power factor is reached, and the load voltage detector (6) consisting of a voltage transformer is set.
) The vector diagram based on the power supply voltage (vl) when the 0 tank circuit has a leading power factor is shown in Figure 3.p VB + Vz in Figure 3
are the same as (vl) and (Vri) in Figure 2, respectively.
(vL) is the voltage drop that occurs in the series reactor (2) due to the load current I, and VL is approximately 9Of phase ahead of I. Therefore, as shown in Figure 3, the load voltage is always higher than the power supply voltage. In normal times when there is no fluctuation in the high zero power supply voltage, if the thyristor device (1) is fully fired without phase control, the load voltage will be higher than the rated voltage of the load. Controls the ignition phase of the ignition phase to set the rated voltage. Even if the power supply voltage fluctuates and drops to 9%, the load voltage is detected by the load voltage detector (6) K, and the detection signal is sent to the thyristor device ( 1) Controlled so that the load voltage is kept constant, the firing phase control angle is controlled so that the ignition phase control angle normally advances.
電源電圧の降下分が補償され負荷端電圧は一定に保喪れ
る。更に電源電圧が上昇した場合は上記降下したとは逆
に 上記検出信号によりサイリスタ
装置（１３（Ｄ点弧位相制御角は遅ｎ電圧はしはシ込ま
ｎ負荷電圧は一定に保持されるＯ
第４９は、上記説明文をグラフ化したもので、ｔＦｉ時
間を示し、ｌお工びＩ′は電源電圧の変動がない状態の
そ−ドで１は電源電圧が降下した場合のモード、■は電
源電圧が上昇した場合のモードを示す〇
表お以上においては負荷力率を常時進みとしサイリスタ
装置の位相制御角を負荷電圧検出器の検出信号に１６１
１制御することにより負荷電圧を調整するものについて
述べたが、これに限らず負荷力率を常時は１．０となる
ようにコンデンサ装置を設定し、電源電圧が低下し九時
のみ進みになるよう制御すると共にサイリスタ装置を制
御し電源電圧の低下を補償するようにしても喪い０
以上のようにこの発明は力率改善用のコンデンサ装置を
誘導性負荷の力率が少なくとも電源電圧が低下した場合
進みとなるよう設定し、負荷電圧に応じサイリスタ装置
の点弧位相制御角を制御しているので電源電圧が低下し
た場合においても誘導性負荷へ一定の電圧を供給するこ
とができ、負荷の稼動率が向上される等諸効果がある。The drop in power supply voltage is compensated for and the load end voltage is maintained constant. If the power supply voltage further rises, contrary to the above-mentioned drop, the thyristor device (13) (D firing phase control angle will be delayed, n voltage will sink, n load voltage will be held constant, etc.) by the above-mentioned detection signal. 49 is a graph of the above explanatory text, showing the tFi time, 1 is the mode when there is no fluctuation in the power supply voltage, 1 is the mode when the power supply voltage drops, and ■ is the mode when the power supply voltage drops. In the above table, the load power factor is always advanced and the phase control angle of the thyristor device is set to 161 to the detection signal of the load voltage detector.
1. Although we have described the method that adjusts the load voltage by controlling the load voltage, this is not limited to this. The capacitor device is set so that the load power factor is always 1.0, and the power supply voltage decreases and advances only at 9 o'clock. As described above, the present invention uses a capacitor device for power factor improvement to reduce the power factor of an inductive load when the power factor of an inductive load decreases. Since the firing phase control angle of the thyristor device is controlled according to the load voltage, a constant voltage can be supplied to the inductive load even when the power supply voltage drops, and the load There are various effects such as improved operating rate.
第１図は従来の誘導性負荷の電圧調整装置を示す回路図
、第２図はこの発明の一実施例を示す回路図、第６図は
ベクトル図、４４図は累２図の各部の状態を示す波形図
である。
図において、（１）はサイリスタ装置、（２）は直列リ
アクトル、（３）はコンデンサ装置であるｏｌにお図中
同一符号は同一または相当部分を示すＯ代理人 葛 野
傷 −
第１図
「−□−コ
第２図
工
第３図
第４図
手続補正書（自発）
特許庁長官殿
■、事件の表示 特願昭 ５６−１４８２０３号
２・ 発明ノ名称 誘導性負荷の電圧間１１俟置
３、補正をする者
事件との関係 特許出願人
住 所 東京都千代田区丸の内二丁目２番３号
名 称（６０１） 三菱電機株式会社代表者片山仁
八部
４、代理人
住 所 東京都千代田区丸の内二丁目２番３号
５、補正の対象
で−
明細書の［特許請求の範囲１、「発明の詳細な説明」及
び「図面の簡単な説明」並びに図面。
６、 補正の内容
１）明細書の「特許請求の範囲」を別紙のとうり補正す
る。
２）明細書第２頁第７行の「構成する。」の後に「（４
）は誘導性負荷、（５）は電源である。」を加入する。
３）明細書第５頁第４行の「設定し、」を「設定し、」
と補正する。
４）明細書第５頁第１３行の「波形図」を「状態図」と
補正する。
５）図面の第１図及び第５図を別紙補正図面の朱字のと
うシ補正する。
以上
別紙
特許請求の範囲
点弧位相制御角を制御し電源から誘導性負荷へ供給され
るｇＬ簀電圧を制御するサイリスタ装置と、上記誘導性
、負荷の力率を改善する。コンデンサ装置および上記負
荷電圧を検出する負荷電圧検出器とを備え、少なくとも
上記電源電圧が所定値より低い時、上記コンデンサ装置
により上記誘導性負荷の力率が進みとなるようにすると
共に上記検出器の検出信号に応じ上記サイリスタ装置の
点弧位相制御角を制御するようにしたことを特徴とする
誘導性負荷の電圧調整装置７゜
第１図
「−□−二
第２図
ら
第４図
中ｔFig. 1 is a circuit diagram showing a conventional inductive load voltage regulator, Fig. 2 is a circuit diagram showing an embodiment of the present invention, Fig. 6 is a vector diagram, and Fig. 44 shows the state of each part in Fig. 2. FIG. In the figure, (1) is a thyristor device, (2) is a series reactor, and (3) is a capacitor device. -□-Co Drawing 2 Drawing 3 Drawing 4 Procedural amendment (voluntary) Mr. Commissioner of the Japan Patent Office■, Indication of the case Japanese Patent Application No. 56-148203 2 Title of the invention 11 meters between voltages of inductive load 3 , Relationship with the case of the person making the amendment Patent Applicant Address 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name (601) Mitsubishi Electric Corporation Representative Hitoshi Katayama 4, Agent Address Chiyoda-ku, Tokyo Marunouchi 2-chome 2-3 No. 5, subject to amendment - [Claim 1 of the specification, "Detailed Description of the Invention" and "Brief Description of the Drawings" and the drawings. 6. Contents of amendment 1) Amend the "Claims" of the specification by attaching it to the attached sheet. 2) On page 2, line 7 of the specification, after “constituting.”
) is an inductive load, and (5) is a power supply. ” to join. 3) Change “set,” to “set,” on page 5, line 4 of the specification.
and correct it. 4) Correct "waveform diagram" on page 5, line 13 of the specification to "state diagram." 5) Correct the red letters in Figures 1 and 5 of the attached drawings. What is claimed above is a thyristor device that controls the firing phase control angle and the gL voltage that is supplied from a power source to an inductive load, and which improves the inductive property and the power factor of the load. a capacitor device and a load voltage detector for detecting the load voltage; at least when the power supply voltage is lower than a predetermined value, the capacitor device causes the power factor of the inductive load to become leading; A voltage regulator for an inductive load, characterized in that the firing phase control angle of the thyristor device is controlled in response to a detection signal of
Claims (1)
る負荷電圧制御するサイリスタ装置と、上記誘導性負荷
の力率を改善するコンデンす装置および上記負荷電圧を
検出する負荷電圧検出器とを備え、少なくと４上記電源
電圧が所定値より低い時、上記コンデンサ装置により上
記誘導性負荷の力率が進みとなるようにすると共に上記
検出器の°検出信号に応じ上記サイリスタ装置の点弧位
相制御角を制御するようにしたことを特徴とする誘導性
負荷の電圧調整装置〇A thyristor device that controls a firing phase control angle and a load voltage supplied from a power source to an inductive load, a condenser device that improves the power factor of the inductive load, and a load voltage detector that detects the load voltage. 4, when the power supply voltage is lower than a predetermined value, the capacitor device causes the power factor of the inductive load to lead, and the thyristor device is ignited in accordance with the detection signal of the detector. Voltage regulator for inductive load, characterized by controlling the phase control angle
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56148203A JPS5850017A (en) | 1981-09-19 | 1981-09-19 | Voltage adjusting device for inductive load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56148203A JPS5850017A (en) | 1981-09-19 | 1981-09-19 | Voltage adjusting device for inductive load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5850017A true JPS5850017A (en) | 1983-03-24 |
Family
ID=15447560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56148203A Pending JPS5850017A (en) | 1981-09-19 | 1981-09-19 | Voltage adjusting device for inductive load |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5850017A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4903181A (en) * | 1989-05-16 | 1990-02-20 | American Telephone And Telegraph Company, At&T Bell Laboratories | Power converter having parallel power switching systems coupled by an impedance inversion network |
-
1981
- 1981-09-19 JP JP56148203A patent/JPS5850017A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4903181A (en) * | 1989-05-16 | 1990-02-20 | American Telephone And Telegraph Company, At&T Bell Laboratories | Power converter having parallel power switching systems coupled by an impedance inversion network |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3900792A (en) | Method and apparatus for generating reactive power | |
| US2619630A (en) | Regulating apparatus | |
| JPS5928159B2 (en) | Excitation adjustment device | |
| JPS5850017A (en) | Voltage adjusting device for inductive load | |
| US3211987A (en) | Excitation system for a dynamoelectric machine | |
| US3226628A (en) | Alternating current voltage/current regulated power supply | |
| JPS6253844B2 (en) | ||
| US2899620A (en) | Electric motor controllers | |
| US2209364A (en) | Motor control system | |
| US3310728A (en) | Regulated a.c.-d.c. converter system | |
| US3378754A (en) | Voltage regulator with inverting capability | |
| US3686551A (en) | Synchronous motor field regulator control | |
| JPS62135259A (en) | Power regulator for high voltage generator | |
| US3946304A (en) | Phase-initiation control arrangement, particularly for a three-phaseconsumer unit | |
| JPH0549163A (en) | Dc power supply | |
| JPH0626457B2 (en) | Control system of reactive power compensator | |
| US2985815A (en) | Speed regulator for motor driven generators | |
| JPS5910950Y2 (en) | 3-phase to single-phase converter | |
| US4314324A (en) | Transformer power supply having an inductively loaded full wave rectifier in the primary | |
| JPH0736138B2 (en) | Reactive power compensator | |
| JPS61109491A (en) | Motor controller | |
| JP2576144B2 (en) | Automatic voltage regulator for synchronous generator | |
| JPS61148516A (en) | Control device for magnetic field generating coil | |
| JPS6032570A (en) | Controller of chopper inverter | |
| JPS60216773A (en) | Constant voltage power converter |