JPS61221599A - Engine drive ac generator - Google Patents

Engine drive ac generator

Info

Publication number
JPS61221599A
JPS61221599A JP60060141A JP6014185A JPS61221599A JP S61221599 A JPS61221599 A JP S61221599A JP 60060141 A JP60060141 A JP 60060141A JP 6014185 A JP6014185 A JP 6014185A JP S61221599 A JPS61221599 A JP S61221599A
Authority
JP
Japan
Prior art keywords
generator
engine
output
frequency
load
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
Application number
JP60060141A
Other languages
Japanese (ja)
Inventor
Takashi Yasukura
安蔵 孝士
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP60060141A priority Critical patent/JPS61221599A/en
Publication of JPS61221599A publication Critical patent/JPS61221599A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00Engines characterised by air compression and subsequent fuel addition
    • F02B3/06Engines characterised by air compression and subsequent fuel addition with compression ignition

Abstract

PURPOSE:To operate an engine at an economical rotating speed by providing frequency converting means at the output side of a generator. CONSTITUTION:A generator 10 is driven by a Diesel engine 1, and an AC output is obtained at a point (a). The AC output is applied to a frequency converter 22, converted by a rectifier 24 and an inverter 26 to the prescribed frequency, and supplied to a load 16. Thus, the engine can be operated without limiting to the output frequency of the generator to operate at an economical rotating speed.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は、ディーゼルエンジン等の駆動によシ、電力を
供給する交流発電装置に係シ、特に周波数特性の優れた
精密級電源に好適なエンジン駆動交流発電装置に関する
[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an alternating current generator that supplies electric power to drive a diesel engine, etc., and is particularly suitable for an engine suitable for a precision power source with excellent frequency characteristics. The present invention relates to a drive AC generator.

〔発明の背景〕[Background of the invention]

近年、コンピュータの端末装置や通信装置の非常用電源
として、周波数特性の優れた精密級電源の需要嘉増大し
ている。このような非常用電源は一般にディーゼルエン
ジンによシ発電機を駆動するようになっている。そして
、従来のエンジン駆動発電装置は、オーム社発行に係る
関酉電気協会編「自家用電源マニユアル」の「発電機単
線結線図の例」に示されるように、発電機発生電源が直
接負荷に接続され、第2図のようになっている。
In recent years, the demand for precision power supplies with excellent frequency characteristics has increased as emergency power supplies for computer terminal devices and communication devices. Such an emergency power source generally uses a diesel engine to drive a generator. In conventional engine-driven power generators, the power generated by the generator is directly connected to the load, as shown in "Example of Generator Single-Line Connection Diagram" in "Private Power Supply Manual" edited by Sekitori Electric Association and published by Ohmsha. The result is as shown in Figure 2.

すなわち、第2図に示すように、発電機10は、ディー
ゼルエンジン12によって駆動される。発電機10の出
力側には、発電機の起動、停止や発電装置の保護を図る
ための制御盤14が接続してあり、この制御盤14を介
して負荷16が接続される。また、発電機10の出力側
には、自動電圧調整器18が設けられ、出力の一部が発
電機10の励磁部20に励磁電源として供給され、所定
の出力が得られるように制御される。
That is, as shown in FIG. 2, the generator 10 is driven by a diesel engine 12. A control panel 14 is connected to the output side of the generator 10 for starting and stopping the generator and for protecting the power generation device, and a load 16 is connected through the control panel 14. Further, an automatic voltage regulator 18 is provided on the output side of the generator 10, and a part of the output is supplied to the excitation section 20 of the generator 10 as an excitation power source, and is controlled so that a predetermined output is obtained. .

したがって、従来のエンジン駆動発電装置は、負荷16
が特殊なものでない限り、発電機10の出力は、50ま
たは60H!と考えてよい。ところで、エンジンの回転
速度Nと発電機の周波数との間には、 の関係がある。したがって、エンジンの回転速度は、発
電機の出力周波数によって制限される。しかし、エンジ
ンには経済回転速度があり、この経済回転速度をもって
運転するのが最屯経済的である。
Therefore, a conventional engine-driven power generator has a load 16
Unless it is special, the output of the generator 10 is 50 or 60H! You can think that. By the way, there is a relationship between the rotational speed N of the engine and the frequency of the generator. Therefore, the rotational speed of the engine is limited by the output frequency of the generator. However, the engine has an economical rotational speed, and it is most economical to operate the engine at this economical rotational speed.

エンジンの経済回転速度は、明現社の出版に係る、礒貝
勇、山田文男著「わかシや7い機械講座20内燃機関」
の「内燃機関の性能特性」によれば、約260Ofであ
る。このため、発電機の出力周波数が50または60H
zの場合、発電機の極数をいかなる極数に選択しても、
エンジンの回転速度は経済回転速度とならない。したが
って、従来のエンジン駆動発電装置においては、エンジ
ンを経済回転速度でなく、不経済な回転速度をもって運
転していた。また、従来の周波数変動特性のよい精密級
発電装置は、エンジンガバナの性能に限界があるため、
負荷変動時にも安定した周波数特性が得られるように、
容量が一段大きいエンジンを採用し、エンジンにとって
は軽負荷状態において使用し、負荷変動時にも周波数特
性が良好となる方法を採用していた。このため、エンジ
ンの運転が非常に不経済とならざるを得なかった。
The economic rotational speed of an engine is determined by Isamu Isogai and Fumio Yamada, "Wakashiya 7 Mechanical Course 20 Internal Combustion Engine", published by Meigensha.
According to "Performance Characteristics of Internal Combustion Engines", it is about 260Of. Therefore, the output frequency of the generator is 50 or 60H.
For z, no matter what number of poles you choose for the generator,
The rotational speed of the engine is not economical rotational speed. Therefore, in conventional engine-driven power generators, the engine is operated at an uneconomical rotational speed rather than at an economical rotational speed. In addition, conventional precision power generators with good frequency fluctuation characteristics have limited engine governor performance.
In order to obtain stable frequency characteristics even during load fluctuations,
An engine with a larger capacity was used, the engine was used under light load conditions, and a method was adopted to ensure good frequency characteristics even during load fluctuations. For this reason, the operation of the engine had to be extremely uneconomical.

すなわち、よく知られているように1エンジンは軽負荷
運転をした場合、全負荷運転に比べて燃料消費率(g/
p8−h)が大きくなシ、全負荷経済回転速度時に比べ
て非常に不経済となる。例えば、1500rpm、−H
負荷時の燃料消費率は、先に挙げた「わかシやすい機械
講座20内燃機関」の「内燃機関の性能特性」によれば
、約230 g /ps−hであシ、約260 Ori
m、全負荷時の185g/ps・hに比が、約25Xの
燃料消費率の低下となる。
In other words, as is well known, when an engine is operated at a light load, the fuel consumption rate (g/
If p8-h) is large, it becomes very uneconomical compared to when full load economical rotation speed is used. For example, 1500 rpm, -H
The fuel consumption rate under load is approximately 230 g/ps-h, approximately 260 Ori
m, the ratio is 185g/ps·h at full load, resulting in a reduction in fuel consumption rate of approximately 25X.

〔発明の目的〕[Purpose of the invention]

本発明は、エンジンの燃料消費率を向上できるとともに
、周波数特性のよいエンジン駆動交流発電機を提供する
ことを目的とする。
An object of the present invention is to provide an engine-driven alternator that can improve the fuel consumption rate of an engine and has good frequency characteristics.

〔発明の概要〕[Summary of the invention]

本発明は、発電機の出力側に周波数変換手段を設け、発
電機の出力周波数がいかなるものであっても、周波数変
換手段によシ前虎へ波数にして出力するようにし、エン
ジンを経済回転速度をもって運転できるように構成した
ものである。
The present invention provides a frequency conversion means on the output side of the generator, so that no matter what the output frequency of the generator is, the frequency conversion means converts it into a wave number and outputs it to the front engine, so that the engine can be economically rotated. It is constructed so that it can be driven at high speed.

〔発明の実施例〕[Embodiments of the invention]

本発明に係るエンジン駆動交流発電装置の好ましい実施
例を、添付図面に従って詳説する。なお、前記従来技術
において説明した部分に対応する部分については、同一
の符号を付しその説明を省略する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the engine-driven AC generator according to the present invention will be described in detail with reference to the accompanying drawings. Note that the same reference numerals are given to the parts corresponding to the parts explained in the prior art, and the explanation thereof will be omitted.

第1図は、本発明に係るエンジン1@動交流発電装置の
概略構成図である。
FIG. 1 is a schematic configuration diagram of an engine 1@dynamic alternating current generator according to the present invention.

第1図において、発電機10の出力側には、制御盤14
と周波数変換器22とが接続され、この周波数変換器2
2’i介して負荷16が接続される。
In FIG. 1, a control panel 14 is provided on the output side of the generator 10.
and a frequency converter 22 are connected, and this frequency converter 2
A load 16 is connected via 2'i.

周波数変換器22は、整流装置24とインバータ26と
を有している。また、発電機10の出力側のA点におけ
る出力の一部が、ダイオード28t−介して発電機10
の励磁装置に励磁電源として供給される。さらに、整流
器24の出方側のB点における出力の一部が、励磁装置
2oの励磁電源として供給される。
Frequency converter 22 includes a rectifier 24 and an inverter 26. Also, part of the output at point A on the output side of the generator 10 is transmitted to the generator 10 through the diode 28t.
is supplied as excitation power to the excitation device. Furthermore, a part of the output at point B on the output side of the rectifier 24 is supplied as an excitation power source for the excitation device 2o.

上記のごとく構成した実施例にあっては、発電機10が
ディーゼルエンジン12によって駆動され、A点におい
て交流出力を得ることができる。
In the embodiment configured as described above, the generator 10 is driven by the diesel engine 12, and an AC output can be obtained at point A.

この交流出力は、周波数変換器22に入シ、整流装置2
4により整流され、B点において直流となる。この直流
は、インバータ26に入シ、所定の周波数、例えば50
 Hz 、 60 Hz等に変換され、0点において所
定の電圧の交流として取り出され、負荷16に供給され
る。
This AC output enters the frequency converter 22, and the rectifier 2
4, and becomes direct current at point B. This direct current enters the inverter 26 and is applied at a predetermined frequency, e.g.
Hz, 60 Hz, etc., is taken out as an alternating current of a predetermined voltage at the zero point, and is supplied to the load 16.

このように、発電機10の出力は、整流装置24におい
て直流にしたのち、インバータ26を用いて所定の周波
数に変換するため、負荷16に供給する周波数と同一の
ものでなくてよい。したがって、ディーゼルエンジン1
2は、発’t1機1゜の出力周波数に制限されることな
く運転でき、経済回転速度をもって運転することが可能
となる。
In this way, the output of the generator 10 is converted into direct current in the rectifier 24 and then converted to a predetermined frequency using the inverter 26, so the output does not have to be the same as the frequency supplied to the load 16. Therefore, diesel engine 1
2 can be operated without being limited to the output frequency of 1 degree per engine, and can be operated at an economical rotation speed.

この結果、ディーゼルエンジン12の燃料消費率を向上
することができ、経済性の優れた交流発電装置を得るこ
とができる。また、整流装置24の直流出力を発電機1
0の励磁電源とし、さらに、発電機10の出力電流を励
磁電流として利用することによシ、従来必要としていた
自動電圧調整器を省略することができる。さらに、イン
バータ26により所定の周波数に変換するため、負荷変
動等が生じても負荷16に供給する出力周波数を常に一
定に保つことができる。
As a result, the fuel consumption rate of the diesel engine 12 can be improved, and an AC power generator with excellent economic efficiency can be obtained. In addition, the DC output of the rectifier 24 is transferred to the generator 1.
By using the output current of the generator 10 as the excitation current and using the output current of the generator 10 as the excitation current, it is possible to omit the automatic voltage regulator that was conventionally required. Furthermore, since the frequency is converted to a predetermined frequency by the inverter 26, the output frequency supplied to the load 16 can always be kept constant even if load fluctuations occur.

〔発明の効果〕〔Effect of the invention〕

以上に説明したごとく、本発明によれば、エンジンの燃
料消費率を向上することができるとともに、良好な周波
数特性を得ることができる。
As described above, according to the present invention, it is possible to improve the fuel consumption rate of the engine and to obtain good frequency characteristics.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明に係るエンジン駆動交流発電装置の概略
構成図、第2図は従来のエンジン駆動交流発電装置の概
略構成図である。 10・・・発電機、12・・・ディーゼルエンジン、1
6・・・負荷、22・・・周波数変換器、24・・・整
流装置、26・・・インバータ。
FIG. 1 is a schematic diagram of an engine-driven AC power generator according to the present invention, and FIG. 2 is a schematic diagram of a conventional engine-driven AC power generator. 10... Generator, 12... Diesel engine, 1
6... Load, 22... Frequency converter, 24... Rectifier, 26... Inverter.

Claims (1)

【特許請求の範囲】[Claims] 1、交流発電機を回転駆動するエンジンと、このエンジ
ンの出力を前記交流発電機の負荷変動に対応して制御す
る制御手段とを有するエンジン駆動交流発電装置におい
て、前記交流発電機の出力側に周波数変換手段を設けた
ことを特徴とするエンジン駆動交流発電装置。
1. In an engine-driven alternating current generator including an engine that rotationally drives an alternator, and a control means that controls the output of the engine in response to load fluctuations of the alternator, on the output side of the alternator. An engine-driven alternating current generator characterized by being provided with frequency conversion means.
JP60060141A 1985-03-25 1985-03-25 Engine drive ac generator Pending JPS61221599A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60060141A JPS61221599A (en) 1985-03-25 1985-03-25 Engine drive ac generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60060141A JPS61221599A (en) 1985-03-25 1985-03-25 Engine drive ac generator

Publications (1)

Publication Number Publication Date
JPS61221599A true JPS61221599A (en) 1986-10-01

Family

ID=13133564

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60060141A Pending JPS61221599A (en) 1985-03-25 1985-03-25 Engine drive ac generator

Country Status (1)

Country Link
JP (1) JPS61221599A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0644647A1 (en) * 1993-09-17 1995-03-22 British Gas plc An electrical power generating arrangement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0644647A1 (en) * 1993-09-17 1995-03-22 British Gas plc An electrical power generating arrangement

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