JPS60174065A - Protecting method of cycloconverter - Google Patents
Protecting method of cycloconverterInfo
- Publication number
- JPS60174065A JPS60174065A JP59029821A JP2982184A JPS60174065A JP S60174065 A JPS60174065 A JP S60174065A JP 59029821 A JP59029821 A JP 59029821A JP 2982184 A JP2982184 A JP 2982184A JP S60174065 A JPS60174065 A JP S60174065A
- Authority
- JP
- Japan
- Prior art keywords
- cycloconverter
- bypass switch
- load
- failed
- input power
- 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
- H02M5/25—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 thyratron or thyristor type requiring extinguishing means
- H02M5/27—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 thyratron or thyristor type requiring extinguishing means for conversion of frequency
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ac-Ac Conversion (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の技術分野］
本発明は、同期電動機等の可変周波数負荷を駆動するサ
イクロコンバータ装置に於て、本装置が位相制御不可能
となった場合の保護方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a protection method for a cycloconverter device that drives a variable frequency load such as a synchronous motor when the device becomes unable to perform phase control.
［発明の技術的背景とその問題点］ 門、□よ、６期□ＩＩＩ、）□□、わ□。[Technical background of the invention and its problems] Gate, □yo, 6th period□III,)□□, wa□.
直
構成図であり、１はサイクロ・コンバータ、２はその入
力変圧器、３は同期電動機、４はサイクロ・コンバータ
の制御回路である。この様な装置に於て交流入力電源の
低下又は喪失（図中の２７８動作）やサイリスタの点弧
パルス送出異常時には正常な位相制御が不可能と□なる
ので、ゲートブロックによる保護を通常実施している。This is a direct configuration diagram, where 1 is a cyclo-converter, 2 is its input transformer, 3 is a synchronous motor, and 4 is a control circuit for the cyclo-converter. In such equipment, normal phase control becomes impossible in the event of a drop or loss of AC input power (operation 278 in the diagram) or an abnormality in the firing pulse of the thyristor, so protection with a gate block is normally implemented. ing.
態では上記ゲートブロックの保護状態では出力電流の零
点が形成されす□イリスタがターン・オフする迄の時間
が長くなり、サイリスタの通電責務が苛酷となる欠点が
ある。In this case, in the protected state of the gate block, a zero point of the output current is formed, and the time required for the thyristor to turn off becomes long, resulting in a severe responsibility for energizing the thyristor.
［発明の目的］
通電責務が苛酷となる状態を回避するサイクロコンバー
タの保護方法を提供することを目的とする。[Object of the Invention] It is an object of the invention to provide a method for protecting a cycloconverter that avoids a situation where the duty to conduct electricity becomes severe.
［発明の概Ｉ！］
本発明は、この目的を達成するために、交流入力電源喪
失又点弧パルス送出機能喪失時にサイクロコンバータを
ゲー＋−ｉロックすると共に、負荷と並・列に設けた側
路スイッチを閉路し、負荷側からサイクロコンバータ側
への電流の流入を防止するようにしたことを特徴として
いる。[Outline of the invention I! ] In order to achieve this object, the present invention locks the cycloconverter when AC input power is lost or the ignition pulse sending function is lost, and also closes the bypass switch installed in parallel with the load. , is characterized in that it prevents current from flowing from the load side to the cycloconverter side.
［発明の実施例］
以下本発明の一実施例を第２図に示す概略構成図で説明
する。図中１１は等価単相負荷に設けた側路スイッチ、
１２は同期電源低下検出器、１３は点弧パルス異常検出
器、１４は出力電流又は出力電圧、制御回路、１５は位
相制御回路、１６は点弧パルス発生器である。[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to a schematic configuration diagram shown in FIG. In the figure, 11 is a bypass switch installed in an equivalent single-phase load.
12 is a synchronous power supply drop detector, 13 is an ignition pulse abnormality detector, 14 is an output current or output voltage, a control circuit, 15 is a phase control circuit, and 16 is an ignition pulse generator.
第２図に於て、交流入力電源の低下又は喪失時には同期
電源低下検出器１２が動作し、ゲートブロック保護を行
うと共に、側路スイッチ１１が閏とされるので同期機器
の誘起逆起電圧による負荷側よりのサイクロコン、バー
タに流入する電流を側路できる。このためサイリスタに
とって苛酷な通電責務を避けることが出来る。In Fig. 2, when the AC input power drops or is lost, the synchronous power supply drop detector 12 operates to provide gate block protection, and the bypass switch 11 is set as a leap, so that the induced back electromotive voltage of the synchronous equipment is Current flowing into the cycloconverter and converter from the load side can be bypassed. Therefore, it is possible to avoid severe energization duties for the thyristor.
同様な保護が点弧パルスの送出機能喪失時にも行なわれ
る。Similar protection is provided in the event of loss of firing pulse delivery capability.
第３図は本発明の他の実施例を示す構成図で、図中２１
は第１の出力周波数レベル検出器、同様に２２は第２の
出力周波数レベル検出器である。FIG. 3 is a block diagram showing another embodiment of the present invention.
is a first output frequency level detector, and similarly 22 is a second output frequency level detector.
第３図の構成に於て、例えば交流入力電源が喪失すると
、サイクロコンバータ出力はゲートブロック状態で零電
圧と、なる。従ってサイリスタに流れる電流は負荷であ
る同期電動１１３の出力周波数によって電流零点の形成
点が依存するので、特定周波数以上（本図では設定値（
１）では電流責務が苛酷とならない状態にある。In the configuration shown in FIG. 3, for example, if the AC input power supply is lost, the cycloconverter output becomes zero voltage in a gate blocked state. Therefore, the current flowing through the thyristor depends on the output frequency of the synchronous motor 113, which is the load, at which the current zero point is formed.
In 1), the current duty is not severe.
この様な領域では側路保護は不要で、ゲートブロック保
護だけで十分で□ある。従って設定周波数ｆ１以下の状
態で周波数ニレベル検出器２１を出力することで上記保
護は達成される。In such areas, bypass protection is not necessary, and gate block protection alone is sufficient. Therefore, the above protection can be achieved by outputting the output from the frequency two-level detector 21 when the frequency is below the set frequency f1.
又、点弧パルス送出機能喪失時には、ゲートブロック保
護動作により、サイクロコンバータ出力には交流（入力
）電源周波数が現われ、この電圧と同期電動１１３の誘
起逆起電圧との関係でサイリスタに流れる電流の零点形
成が決定される。従りて前記サイクロコンバータの５出
力電圧により、電流責務が苛酷となる設定周波数ｆ２以
下で前記と１５−の側路スイッチによる保護を行なうこ
とができる。Furthermore, when the ignition pulse sending function is lost, the alternating current (input) power frequency appears at the cycloconverter output due to the gate block protection operation, and the relationship between this voltage and the induced back electromotive voltage of the synchronous motor 113 causes the current flowing through the thyristor to change. Zero point formation is determined. Therefore, the 5-output voltage of the cycloconverter allows protection by the above-mentioned bypass switch 15- to be provided below the set frequency f2 at which the current duty becomes severe.
本＊施例の構成とすることで、交流入力電源喪失等のゲ
ーＩ・ブロック保護動−作に伴う、側路スイッチの閉に
よ
見た交流入力の短絡確率を低減出来る効果が生じる。The configuration of this embodiment has the effect of reducing the short-circuit probability of the AC input when the bypass switch is closed due to the gate I block protection operation such as loss of AC input power supply.
［発明の効果］
以上述べた様に本発明とすることで同期電動機等の可変
周波数負荷を有するザイクロコンバータ装置、に於て交
流入力電源喪失等に伴うゲートブロック保護動作時に該
装置のサイリスタにとって苛酷な通電責務状態を回避す
ることが可能となる。[Effects of the Invention] As described above, the present invention enables the thyristor of a zycroconverter device having a variable frequency load such as a synchronous motor to operate to protect the gate block due to loss of AC input power, etc. It becomes possible to avoid severe energization duty conditions.
第１図は同期電動機の、駆動システムの構成図、第２図
は本発明の一実施例を示す構成図、第３図は本発明の他
の実施例を示す構成図である。
１・・・サイクロコンバータ、２・・・六方変圧器、３
・・・同期電動機、４・・・（サイクロコンバータの）
制御回路、−１１・・・側路スイッチ、１２・・・同期
電源低下検出回路、１３・・・点弧パルス異常検出器、
１４・・・出力電流（又は電圧）制御回路、１５・・・
位相制御回路、１６・・・点弧パルス発生回路、２１．
２２・・・出力周波数レベル検出器。
出願人代理人 弁理士 鈴江武彦
第１図
第２図
第３図FIG. 1 is a block diagram of a drive system of a synchronous motor, FIG. 2 is a block diagram showing one embodiment of the present invention, and FIG. 3 is a block diagram showing another embodiment of the present invention. 1...Cyclo converter, 2...Hexagonal transformer, 3
...Synchronous motor, 4... (cycloconverter)
Control circuit, -11... Side path switch, 12... Synchronous power supply drop detection circuit, 13... Ignition pulse abnormality detector,
14... Output current (or voltage) control circuit, 15...
Phase control circuit, 16... Ignition pulse generation circuit, 21.
22...Output frequency level detector. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2 Figure 3
Claims (1)
装置に於て、該装置の交流入力電源喪失又はサイリスタ
の点弧パルス送出機能喪失時に、サイクロコンバータを
ゲート・ブロック停止すると共に、負荷と並列に設けた
側路スイッチを閉路することを特徴としたサイクロコン
バータの保護方法。 （ａ 前記側路スイッチは、前記サイクロコンバータの
出力周波数が所定値以下の範囲にある場合にのみ閉路す
るようにしたことを特徴とする特許請求の範囲第１項記
載のサイクロコンバータの保護方法。[Scope of Claims] 1,,' (1) In a cyclo-converter device having a variable frequency load, when the device loses AC input power or the firing pulse sending function of the thyristor is lost, the cyclo-converter is gated.・A protection method for a cycloconverter characterized by stopping the block and closing a bypass switch installed in parallel with the load. (a) The cycloconverter protection method according to claim 1, wherein the bypass switch is configured to close only when the output frequency of the cycloconverter is within a predetermined value or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59029821A JP2703212B2 (en) | 1984-02-20 | 1984-02-20 | How to protect cycloconverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59029821A JP2703212B2 (en) | 1984-02-20 | 1984-02-20 | How to protect cycloconverter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60174065A true JPS60174065A (en) | 1985-09-07 |
| JP2703212B2 JP2703212B2 (en) | 1998-01-26 |
Family
ID=12286685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59029821A Expired - Lifetime JP2703212B2 (en) | 1984-02-20 | 1984-02-20 | How to protect cycloconverter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2703212B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000027019A1 (en) * | 1998-10-30 | 2000-05-11 | Kabushiki Kaisha Yaskawa Denki | Method and apparatus for protecting pwm cycloconverter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5363528A (en) * | 1976-11-17 | 1978-06-07 | Matsushita Electric Ind Co Ltd | Static power converter |
| JPS5365925A (en) * | 1976-11-25 | 1978-06-12 | Toshiba Corp | Cyclo-converter |
| JPS5425543A (en) * | 1977-07-28 | 1979-02-26 | Matsushita Electric Ind Co Ltd | Zero-voltage oscillation prohibiting circuit |
-
1984
- 1984-02-20 JP JP59029821A patent/JP2703212B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5363528A (en) * | 1976-11-17 | 1978-06-07 | Matsushita Electric Ind Co Ltd | Static power converter |
| JPS5365925A (en) * | 1976-11-25 | 1978-06-12 | Toshiba Corp | Cyclo-converter |
| JPS5425543A (en) * | 1977-07-28 | 1979-02-26 | Matsushita Electric Ind Co Ltd | Zero-voltage oscillation prohibiting circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000027019A1 (en) * | 1998-10-30 | 2000-05-11 | Kabushiki Kaisha Yaskawa Denki | Method and apparatus for protecting pwm cycloconverter |
| EP1154552A1 (en) * | 1998-10-30 | 2001-11-14 | Kabushiki Kaisha Yaskawa Denki | Method and apparatus for protecting pwm cycloconverter |
| US6351397B1 (en) | 1998-10-30 | 2002-02-26 | Kabushiki Kaisha Yaskawa Denki | Protection apparatus and protection method of PWM cycloconverter |
| EP1154552A4 (en) * | 1998-10-30 | 2009-06-03 | Yaskawa Denki Seisakusho Kk | Method and apparatus for protecting pwm cycloconverter |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2703212B2 (en) | 1998-01-26 |
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