JPS59127575A - Single-phase/3-phase converter circuit - Google Patents
Single-phase/3-phase converter circuitInfo
- Publication number
- JPS59127575A JPS59127575A JP58000610A JP61083A JPS59127575A JP S59127575 A JPS59127575 A JP S59127575A JP 58000610 A JP58000610 A JP 58000610A JP 61083 A JP61083 A JP 61083A JP S59127575 A JPS59127575 A JP S59127575A
- Authority
- JP
- Japan
- Prior art keywords
- phase
- current
- unidirectional
- connection point
- energy storage
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2209/00—Indexing scheme relating to controlling arrangements characterised by the waveform of the supplied voltage or current
- H02P2209/05—Polyphase motors supplied from a single-phase power supply or a DC power supply
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ac-Ac Conversion (AREA)
- Inverter Devices (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、単相交流を３相電流波形に変換する単相−３
相変換回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a single-phase -3
This relates to a phase conversion circuit.
従来、単相交流を３相交流に変換し、且つ電気波形を合
成する多数の回路が良く知られている。Conventionally, many circuits that convert single-phase alternating current to three-phase alternating current and synthesize electrical waveforms are well known.
然しこれらの回路は非常に複雑であり、多数の部品を必
要とし、コストが高い上に信頼性も少ないとい本領向が
あった。又、これらの公知回路の多くは出力側に変圧器
を備え、重量及び容積などの軽量、小型化が困難である
という制約があった。However, these circuits are highly complex, require a large number of components, are expensive, and have low reliability. Furthermore, many of these known circuits are equipped with a transformer on the output side, and have the limitation that it is difficult to reduce the weight and volume of the circuit, as well as to reduce the size of the circuit.
本発明は、前記欠陥を改善した単相交流電源から、３相
交流電圧波形へ変換する回路であって、スイッチ手段に
パルス幅変調（ＰＷＭ）技術を適用することにより交流
波形を合成し、３相交流電流波形に正弦波状の電流を得
ることができる回路を広く提供せんとするものである。The present invention is a circuit for converting a single-phase AC power supply into a three-phase AC voltage waveform, which improves the above defects, and synthesizes the AC waveform by applying pulse width modulation (PWM) technology to the switch means. The present invention aims to widely provide a circuit that can obtain a sinusoidal current waveform in a phase alternating current waveform.
即ち本発明は、ブリッヂ接続された、第１及至第４の一
方向性電流手段と第１電気エネルギー蓄積手段を通して
、直列接続された第２及び第３の電気エネルギー蓄積手
段に、単相交流電源から電気エネルギーが蓄積される。That is, in the present invention, a single-phase AC power supply is applied to the second and third electrical energy storage means connected in series through the first to fourth unidirectional current means and the first electrical energy storage means connected in a bridge. Electrical energy is stored from
例えば、第２及び第３の電気エネルギー蓄積手段にキャ
パシタを備えれば、これらの第２及び第３キヤパシタに
は電荷が蓄積され電圧が確定する。For example, if the second and third electrical energy storage means include capacitors, charges are stored in these second and third capacitors and a voltage is established.
第２キヤパシタと第３キヤパシタを直列接続した第１接
続点は、３相交流出力電圧の中性点となり、この中性点
に対して、第１及至第４の単極単投電流一方向性スイッ
チ手段をオン又はオフにすることにより、第１出カ端子
と第２出カ端子に位相差が６０°ずれた交流電圧波形を
得る、ことができる。The first connection point where the second capacitor and the third capacitor are connected in series becomes the neutral point of the three-phase AC output voltage, and the first to fourth single-pole single-throw currents are unidirectional with respect to this neutral point. By turning on or off the switch means, it is possible to obtain an AC voltage waveform with a phase difference of 60° at the first output terminal and the second output terminal.
これらのオンオフのスイッチ操作を行っても、第１電気
エネルギー蓄積手段にインダクターを用いることにより
、スイッチ手段は保護され、単相から３相交流への電力
変換は円滑に行うことが可能である。Even when these on/off switch operations are performed, the switch means is protected by using an inductor as the first electrical energy storage means, and power conversion from single-phase to three-phase alternating current can be performed smoothly.
以下、本発明を実施例で以って、更に詳細に説明する。Hereinafter, the present invention will be explained in more detail with reference to Examples.
図において、入力端子／、４に単相交流電源■が接続さ
れ、出力端子Ａ、Ｂ、Ｃには３相負荷として３相誘導電
動機１．Ｍが接続されている。この変換回路には、イン
ダクタ１０／と；二つのキャパシタ１０．２，１０３と
′；ダイオード／ ／、／、２゜／３．／ダと；トラン
ジスタＳｌ、 Ｓ２． Ｓ３． Ｓ４と；入力端子ｌ２
．２と：出カ端子Ａ、Ｂ、Ｃとを備えている。In the figure, a single-phase AC power supply ■ is connected to input terminals / and 4, and a three-phase induction motor 1. M is connected. This conversion circuit includes an inductor 10/; two capacitors 10.2, 103'; diodes /, /, 2°/3. /da; transistors Sl, S2. S3. S4 and input terminal l2
．． 2: Output terminals A, B, and C are provided.
単相交流電源の電圧極性が、入力端子／が入力端子ｄに
対して正である期間には、ダイオード／／、／’ｌとイ
ンダクタ１０／を通して、キャパシタｌＯρ、１０３に
電荷が蓄積される。又、単相交流電源の電圧極性が、入
力端子／が入力端子−に対して負である期間には、ダイ
ゝオード／３゜ｌ−とインダクタ１０／を通して、キャ
パシタ１０．２，１０３に電荷が蓄積される。キャパシ
タ１０．２と７０３の電圧をＥボルトとし、出力端子Ｃ
の相電圧Ｖ、ｃを０ボルト（仮想中性点）とし、出力端
子ＡとＣの間の線間電圧をＶａｃ、出力端子ＢとＣの間
の線間電圧をＶｂｃとすれば、線間電圧Ｖａｃはトラン
ジスタＳ１をオン、トランジスタＳ２をオフすることに
より＋Ｅボルト、トランジスタＳ１をオフ、トランジス
タＳ２をオンすることにより−Ｅボルトにすることがで
きる。又同様に線間電圧ＶｂｃはトランジスタＳ３をオ
ン、トランジスタＳ４をオフすることにより＋Ｅボルト
、トランジスタＳ３をオフ、トランジスタＳ４をオンす
ることにより−Ｅボルトにすることができる。従って、
トランジスタ８１，８２．Ｓ３．Ｓ４のオンオフ動作に
ＰＷＭ技術を用いることにより線間電圧Ｖａｃ。During a period in which the voltage polarity of the single-phase AC power supply is positive at the input terminal / with respect to the input terminal d, charge is accumulated in the capacitor lOρ, 103 through the diodes //, /'l and the inductor 10/. Furthermore, during a period in which the voltage polarity of the single-phase AC power supply is negative between the input terminal / and the input terminal -, charges are transferred to the capacitors 10.2 and 103 through the diode /3゜l- and the inductor 10/. is accumulated. The voltage of capacitors 10.2 and 703 is E volts, and the output terminal C
If the phase voltages V and c of are 0 volts (virtual neutral point), the line voltage between output terminals A and C is Vac, and the line voltage between output terminals B and C is Vbc, then the line voltage The voltage Vac can be set to +E volts by turning on the transistor S1 and turning off the transistor S2, and to -E volts by turning off the transistor S1 and turning on the transistor S2. Similarly, the line voltage Vbc can be set to +E volts by turning on the transistor S3 and turning off the transistor S4, and to -E volts by turning off the transistor S3 and turning on the transistor S4. Therefore,
Transistors 81, 82. S3. The line voltage Vac is reduced by using PWM technology for the on/off operation of S4.
Ｖｂｅ間に６０°位相差をもった基本波電圧を発生させ
ることができる。この様なスイッチング動作を行えば、
３相誘導電動機１．Ｍにそれぞれ１２０゜位相差をもっ
た電流を流すことができる。又この様なスイッチング動
作を行っても、インダクタ１０／が単相交流電源との間
に直列に接続されているため、トランジスタＳＬ、Ｓ２
．Ｓ３．Ｓ４や、キャパシタ１０ｏ２，１０３には過大
な電圧が付加されることなく、単相から３相への電力変
換を行うことができる。A fundamental wave voltage having a 60° phase difference between Vbe and Vbe can be generated. If you perform this kind of switching operation,
3 phase induction motor 1. Currents having a phase difference of 120° can be passed through M. Moreover, even if such a switching operation is performed, since the inductor 10/ is connected in series with the single-phase AC power supply, the transistors SL and S2
．． S3. Power conversion from single phase to three phase can be performed without excessive voltage being applied to S4 and capacitors 10o2 and 103.
図は、本発明の単相−３相変換回路の一実施態様を示す
構成図である。
■＝単相電源、 １．Ｍ：３相誘導電動機（負荷）、
／、ａ２：入力端子、 Ａ、Ｂ、Ｃ：出力端子、
１０／：インダクタ、 １０コ、１０．３：キャ
パシタ、 ／／、／λ、／３．／’Ｉ：ダイオード、
Ｓｔ、Ｓ２．Ｓ３．Ｓｌ トランジスタＰｌ第１接
続点、 Ｐ２：第２接続点、 Ｐ３：第３接続点The figure is a configuration diagram showing one embodiment of the single-phase to three-phase conversion circuit of the present invention. ■=Single-phase power supply, 1. M: 3-phase induction motor (load),
/, a2: input terminal, A, B, C: output terminal,
10/: Inductor, 10, 10.3: Capacitor, //, /λ, /3. /'I: diode,
St, S2. S3. SL transistor Pl first connection point, P2: second connection point, P3: third connection point
Claims (1)
において、該変換回路の端子は、第１及び第２の入力端
子と、 第１及至第３の出力端子とを備え、 前記第１入力端子と第１出力端子との間には直列に接続
した第１電気エネルギー蓄積手段を備え、前記第２入力
端子と第２出力端子は接続されており、且つ第２及び第
３の電気エネルギー蓄積手段を備え、該第２及び第３の
電気エネルギー蓄積手段は直列に接続した第１接続点を
有し、該第１接続点と前記第３出力端字は接続されてい
る。 該第２電気エネルギー蓄積手段の第１接続点でない他方
の第２接続点は、 電流方向が互いに逆極性に、並列に接続された、第１単
極単投電流一方向性スイッチ手段と第１一方向性電流手
段を直列に介して、前記第１出力端子に接続され、 更に第２接続点は、 電流方向が互いに逆極性、並列に接続された、第３単極
単投電流一方向性スイッチ手段と第３一方向性電流手段
を直列に介して、前記第２出力端子に接続されている。 該第３電気エネルギー蓄積手段の第１接続点でない他方
の第３接続点は、 電流方向が互いに逆極性に、並列に接続された、第２単
極単投電流一方向性スイッチ手段と第２一方向性電流手
段を直列に介して、前記第１出力端子に接続され、 更に第３接続点は、 電流方向が互いに逆極性に、並列に接続された、第４単
極単投電流一方向性スイッチ手段と第４一方向性電流手
段を直列に介して、前記第２出力端子に接続されている
ことを特徴とする単相−３相変換回路。 ２）前記、第１及至第４単極単投電流一方向性スイツチ
手段がトランジスタである特許請求の範囲第１項記載の
単相−３相変換回路。 ３）前記、第１及至第４一方向性電流手段がダイオード
、サイリスタ、トライアック、逆並列サイリスタから選
ばれた１種である特許請求の範囲第１項記載の単相−３
相変換回路。 ４）前記、第１電気エネルギー蓄積手段がインダクタで
ある特許請求の範囲第１項記載の単相−３相変換回路。 ５）前記、第２及び第３電気エネルギー蓄積手段がキャ
パシタである特許請求の範囲第１項記載の単相−３相変
換回路。[Claims] l) In a power conversion circuit that converts a single-phase AC power source to a three-phase AC power source, the terminals of the conversion circuit include first and second input terminals, and first to third output terminals. a first electric energy storage means connected in series between the first input terminal and the first output terminal, the second input terminal and the second output terminal are connected, and a second and a third electrical energy storage means, the second and third electrical energy storage means having a first connection point connected in series, and the first connection point and the third output terminal are connected. ing. The other second connection point, which is not the first connection point, of the second electric energy storage means is connected to the first single-pole single-throw current unidirectional switch means and the first single-pole single-throw current unidirectional switch means, which are connected in parallel so that the current directions are opposite to each other. A third single-pole single-throw current unidirectional device is connected to the first output terminal through a unidirectional current means in series, and the second connection point is connected in parallel with current directions opposite to each other. The switch means and the third unidirectional current means are connected in series to the second output terminal. The other third connection point, which is not the first connection point, of the third electric energy storage means is connected to a second single-pole single-throw current unidirectional switch means, which are connected in parallel so that the current directions are opposite to each other. A fourth single-pole single-throw current unidirectional current means is connected in series to the first output terminal, and the third connection point is connected in parallel with the current direction being opposite to each other. 1. A single-phase to three-phase conversion circuit, characterized in that the single-phase to three-phase conversion circuit is connected to the second output terminal via a unidirectional current switch means and a fourth unidirectional current means in series. 2) The single-phase to three-phase conversion circuit according to claim 1, wherein said first to fourth single-pole single-throw current unidirectional switch means are transistors. 3) The single phase-3 according to claim 1, wherein the first to fourth unidirectional current means are one type selected from a diode, a thyristor, a triac, and an anti-parallel thyristor.
Phase conversion circuit. 4) The single-phase to three-phase conversion circuit according to claim 1, wherein the first electrical energy storage means is an inductor. 5) The single-phase to three-phase conversion circuit according to claim 1, wherein said second and third electrical energy storage means are capacitors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58000610A JPH0777515B2 (en) | 1983-01-05 | 1983-01-05 | Single-phase to three-phase conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58000610A JPH0777515B2 (en) | 1983-01-05 | 1983-01-05 | Single-phase to three-phase conversion circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59127575A true JPS59127575A (en) | 1984-07-23 |
| JPH0777515B2 JPH0777515B2 (en) | 1995-08-16 |
Family
ID=11478496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58000610A Expired - Lifetime JPH0777515B2 (en) | 1983-01-05 | 1983-01-05 | Single-phase to three-phase conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0777515B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4663702A (en) * | 1984-10-12 | 1987-05-05 | Kabushiki Kaisha Toshiba | Power converter apparatus and control method thereof |
| EP0397128A2 (en) * | 1989-05-10 | 1990-11-14 | Apc-Onsite, Inc. | Frequency-independent singlephase to three-phase AC power conversion |
| KR100562028B1 (en) * | 2004-01-05 | 2006-03-16 | 주식회사 벤토피아 | Fan driving circuit for positive pressure-to-output characteristic |
| US10333420B2 (en) * | 2017-10-30 | 2019-06-25 | Phase Technologies, Llc | Active single phase to three phase power converter |
| CN112542977A (en) * | 2020-12-03 | 2021-03-23 | 广东电网有限责任公司 | Method for enabling three-phase motor to operate in single-phase power grid |
-
1983
- 1983-01-05 JP JP58000610A patent/JPH0777515B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4663702A (en) * | 1984-10-12 | 1987-05-05 | Kabushiki Kaisha Toshiba | Power converter apparatus and control method thereof |
| EP0397128A2 (en) * | 1989-05-10 | 1990-11-14 | Apc-Onsite, Inc. | Frequency-independent singlephase to three-phase AC power conversion |
| KR100562028B1 (en) * | 2004-01-05 | 2006-03-16 | 주식회사 벤토피아 | Fan driving circuit for positive pressure-to-output characteristic |
| US10333420B2 (en) * | 2017-10-30 | 2019-06-25 | Phase Technologies, Llc | Active single phase to three phase power converter |
| CN112542977A (en) * | 2020-12-03 | 2021-03-23 | 广东电网有限责任公司 | Method for enabling three-phase motor to operate in single-phase power grid |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0777515B2 (en) | 1995-08-16 |
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