JP2000184796A - Voltage switching device for engine generator - Google Patents
Voltage switching device for engine generatorInfo
- Publication number
- JP2000184796A JP2000184796A JP10359213A JP35921398A JP2000184796A JP 2000184796 A JP2000184796 A JP 2000184796A JP 10359213 A JP10359213 A JP 10359213A JP 35921398 A JP35921398 A JP 35921398A JP 2000184796 A JP2000184796 A JP 2000184796A
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- Prior art keywords
- voltage
- resistor
- parallel
- voltage switching
- synchronous
- Prior art date
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- Control Of Charge By Means Of Generators (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、エンジン発電機に
関し、とくに並列運転が可能なエンジン発電機の電圧切
替装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine generator, and more particularly to a voltage switching device for an engine generator capable of operating in parallel.
【0002】[0002]
【従来の技術】交流エンジン発電機には、使用される電
動機など負荷に対応して低電圧(例えば200V)と高
電圧(例えば400V)の2段階に発電電圧を切替え可
能としたものがあり、広く使用されている。2. Description of the Related Art Some AC engine generators, such as electric motors used, are capable of switching between two levels of low voltage (for example, 200 V) and high voltage (for example, 400 V) according to load. Widely used.
【0003】この発電機は、図2に示すように、発電機
1の電機子コイルを、内側コイル1aと外側コイル1b
の独立した2組から構成し、電圧切替端子板2で端子間
接続を組み替えることによって、発生電圧を切替えてお
り、内側コイル1aと外側コイル1bを直列に接続した
場合は高電圧となり、並列に接続した場合は低電圧にな
るようにしている。[0003] In this generator, as shown in FIG. 2, an armature coil of the generator 1 includes an inner coil 1a and an outer coil 1b.
The generated voltage is switched by rearranging the connection between the terminals by the voltage switching terminal plate 2, and when the inner coil 1a and the outer coil 1b are connected in series, the voltage becomes high, and the voltage becomes high. When connected, it is set to a low voltage.
【0004】即ち、図3に示すように、各外側コイル1
bの内端に接続された電機子端子X1、Y1、Z1をそ
れぞれOに短絡板3で接続し、各外側コイル1bの外端
に接続された電機子端子U1、V1、W1と各内側コイ
ル1aの外端に接続されたU2、V2、W2とをそれぞ
れ短絡板3で接続すれば(図3(a))、内側コイル1
aと外側コイル1bが並列に接続され、電機子端子X
1、Y1、Z1と電機子端子U2、V2、W2とをそれ
ぞれ短絡板3で接続すれば(図3(b))、内側コイル
1aと外側コイル1bが直列に接続される。That is, as shown in FIG.
b, the armature terminals X1, Y1, Z1 connected to the inner end of each of the outer coils 1b are respectively connected to the armature terminals U1, V1, W1 connected to the outer end of each of the outer coils 1b, and the respective inner coils. If U2, V2, and W2 connected to the outer end of 1a are respectively connected by the short-circuit plate 3 (FIG. 3A), the inner coil 1
a and the outer coil 1b are connected in parallel, and the armature terminal X
If 1, 1, Y1, Z1 and the armature terminals U2, V2, W2 are respectively connected by the short-circuit plate 3 (FIG. 3B), the inner coil 1a and the outer coil 1b are connected in series.
【0005】具体的には図4に示すように、電圧切替端
子板2に各電機子端子を等間隔に配置して短絡板3をナ
ットで取り付けられている。なお、図4は短絡板3が低
電圧時の状態に組付けられた場合を示している。一方、
負荷が大きい場合には、複数台の発電機を並列運転して
電力を供給することが行われるが、この作業は、遮断機
10をOFFにして同期スイッチ5をONにし、相手方
の発電機の遮断機10を投入しておき、同期検定灯6を
見ながら調速ノブを操作して同期の瞬間に遮断機10を
投入している。More specifically, as shown in FIG. 4, the armature terminals are arranged at equal intervals on the voltage switching terminal plate 2, and the short-circuit plate 3 is attached with a nut. FIG. 4 shows a case where the short-circuit plate 3 is assembled in a state of a low voltage. on the other hand,
When the load is large, a plurality of generators are operated in parallel to supply power, but this operation is performed by turning off the circuit breaker 10 and turning on the synchronous switch 5, and turning on the other generator. The circuit breaker 10 is turned on, and the speed control knob is operated while looking at the synchronization verification lamp 6 to turn on the circuit breaker 10 at the moment of synchronization.
【0006】この同期点検灯6の電源は、電機子端子U
1、W1から得ており、低電圧であるときには直接接続
し、高電圧のときには抵抗7を介して接続している。抵
抗7を介するか否かは、切替スイッチを設けて行ってい
るものもあるが、切替スイッチの操作を忘れた場合には
同期点検灯6が破損して、同期作業ができなくなってし
まうので、電圧切替えの作業と連動させて自動的に切り
替わるようにしている。The power source of the synchronous check lamp 6 is an armature terminal U
1, which is obtained directly from W1, and is directly connected when the voltage is low, and is connected via the resistor 7 when the voltage is high. In some cases, whether or not through the resistor 7 is provided by providing a changeover switch. However, if the operation of the changeover switch is forgotten, the synchronization check lamp 6 is damaged, and the synchronization work cannot be performed. Automatic switching is performed in conjunction with voltage switching work.
【0007】この自動切替えは、例えば電圧切替端子板
2の電機子端子U1とU2、W1とW2の間に補助端子
8を設けて、高電圧であるときは、同期点検灯6は電機
子端子U1、W1から抵抗7を介して通電され、短絡板
3で低電圧に切替えたときは、補助端子8から抵抗7を
介さずに直接通電されるように構成している。In this automatic switching, for example, an auxiliary terminal 8 is provided between the armature terminals U1 and U2 and W1 and W2 of the voltage switching terminal plate 2, and when the voltage is high, the synchronous check lamp 6 is connected to the armature terminal. When the voltage is switched from U1 and W1 via the resistor 7 and the voltage is switched to the low voltage by the short-circuit plate 3, the current is directly supplied from the auxiliary terminal 8 without the resistor 7.
【0008】[0008]
【発明が解決しようとする課題】しかしながら、補助端
子8は小径であり(図4参照)、短絡板3に係合させて
締結するときに、曲げてしまったりネジを破損させてし
まうことが多々あった。また、電圧切替と並列運転とは
同時的に必要とされるわけではないので、並列運転時に
は補助端子の取付状態を確認することが必要とされた。However, since the auxiliary terminal 8 has a small diameter (see FIG. 4), when the auxiliary terminal 8 is engaged with the short-circuit plate 3 and fastened, the auxiliary terminal 8 often bends or breaks the screw. there were. In addition, since the voltage switching and the parallel operation are not required at the same time, it is necessary to check the attachment state of the auxiliary terminal during the parallel operation.
【0009】そこで、本発明は、短絡板の切替取付作業
では並列運転のための特別な作業を行うことなく自動的
に同期点検灯への回路電圧が切替わるようにしたエンジ
ン発電機の電圧切替装置を提供することを目的とするも
のである。In view of the above, the present invention provides a voltage switching of an engine generator in which the circuit voltage to the synchronous check lamp is automatically switched without performing a special operation for the parallel operation in the switching work of the short-circuit plate. It is intended to provide a device.
【0010】[0010]
【課題を解決するための手段】上記目的を達成するた
め、本発明のエンジン発電機の電圧切替装置では、次の
手段を採った。即ち、独立した2組の電機子コイルを備
え、電圧切替端子板の短絡板を直列に接続して高電圧
を、並列に接続して低電圧を発生するようにしたエンジ
ン発電機において、並列運転の同期投入のための同期点
検灯を該電圧切替端子板から抵抗を介して接続し、低電
圧時に同期スイッチと連動して励磁される電磁継電器を
設けるとともに該電磁継電器のリレー接点を該抵抗と並
列に設けて低電圧時には該抵抗を介さずに同期点検灯へ
通電するようにしたことを特徴としている。Means for Solving the Problems To achieve the above object, the following means is adopted in the voltage switching device for an engine generator according to the present invention. That is, in an engine generator having two independent sets of armature coils and connecting a short-circuiting plate of a voltage switching terminal plate in series to generate a high voltage and connecting in parallel to generate a low voltage, a parallel operation is performed. A synchronous check lamp for synchronous input is connected from the voltage switching terminal plate via a resistor, an electromagnetic relay that is excited in conjunction with the synchronous switch at low voltage is provided, and a relay contact of the electromagnetic relay is connected to the resistor. It is provided in parallel so that at the time of low voltage, the synchronous check lamp is energized without passing through the resistor.
【0011】本発明は、エンジン駆動される交流発電機
で発電電圧を高電圧と低電圧に切替えることができ、さ
らに並列運転ができるものに適用される。また、発電機
電圧の切替えは、発電機の外側コイルと内側コイルから
接続された電機子端子を配設した電圧切替端子板で各電
機子端子の接続を短絡板で変えることによって、外側コ
イルと内側コイルを直列にするか並列にするかして行わ
れ、並列運転の同期投入を同期点検灯を見ながら行うも
のに適用される。したがって、自動で並列運転できるよ
うにした自動並列運転装置を付設しているエンジン発電
機は対象とされない。The present invention is applied to an AC generator driven by an engine that can switch a generated voltage between a high voltage and a low voltage and that can perform parallel operation. In addition, the switching of the generator voltage is performed by changing the connection of each armature terminal with a short-circuit plate with a voltage switching terminal plate provided with armature terminals connected from the outer coil and the inner coil of the generator, thereby connecting the outer coil to the outer coil. The operation is performed by setting the inner coil in series or in parallel, and is applied to a case where the synchronous operation of the parallel operation is performed while watching the synchronous check lamp. Therefore, an engine generator provided with an automatic parallel operation device capable of automatically performing parallel operation is not targeted.
【0012】並列運転の同期投入のために必要な同期点
検灯は電圧切替端子板の電機子端子から抵抗を介して接
続されるが、この電機子端子は発電機の外側コイルの外
端(出力線側)と接続された端子である。三相発電機で
はU1、V1、W1の3点あるが、いずれと接続しても
よい。A synchronous check lamp required for the synchronous turning on of the parallel operation is connected via a resistor from an armature terminal of the voltage switching terminal plate, and this armature terminal is connected to the outer end (output) of the outer coil of the generator. Line side). The three-phase generator has three points U1, V1, and W1, but may be connected to any of them.
【0013】上記の「低電圧時に同期スイッチと連動し
て励磁される電磁継電器」という構成は、高電圧時にお
いては電磁継電器が作動しないことを意味し、例えば、
発電機の外側コイルの内端(X1)から内側コイルの外
端(U2)へ接続する配線中に同期スイッチと連動して
開閉する補助接点と電磁継電器を設けるごとき構成を意
味している。[0013] The above-mentioned "electromagnetic relay which is excited in conjunction with the synchronous switch at the time of low voltage" means that the electromagnetic relay does not operate at the time of high voltage.
This means a configuration in which auxiliary contacts and electromagnetic relays that open and close in conjunction with a synchronous switch are provided in a wiring connecting the inner end (X1) of the outer coil of the generator to the outer end (U2) of the inner coil.
【0014】したがって、発電機が高電圧に設定されて
いるときに並列運転する場合は、同期スイッチの補助接
点がONになっても電磁継電器は励磁されることがない
ので、同期点検灯へは抵抗を介して通電される。一方、
発電機が低電圧に設定されているときに並列運転する場
合は、同期スイッチの投入によって補助接点がONとな
り、電磁継電器が励磁される。これによって、抵抗に並
列に設けたリレー接点がONになり、同期点検灯へは抵
抗を介さずに通電されることになる。Therefore, when the generators are set to a high voltage and are operated in parallel, the electromagnetic relay is not excited even when the auxiliary contact of the synchronous switch is turned on. It is energized through a resistor. on the other hand,
When the generator is set to low voltage and operates in parallel, the auxiliary switch is turned on by turning on the synchronous switch, and the electromagnetic relay is excited. As a result, the relay contact provided in parallel with the resistor is turned on, and the synchronous check lamp is energized without passing through the resistor.
【0015】[0015]
【発明の実施の形態】以下本発明の実施形態例を図1に
基づいて説明する。発電機1と電圧切替端子板2との接
続回路は上記従来技術で説明した図2と同じである。即
ち、発電機1の電圧切替は、各外側コイル1bの内端に
接続された電機子端子X1、Y1、Z1をそれぞれOに
短絡板3で接続し、各外側コイル1bの外端に接続され
た電機子端子U1、V1、W1と各内側コイル1aの外
端に接続されたU2、V2、W2とをそれぞれ短絡板3
で接続して低電圧(200V)に、電機子端子X1、Y
1、Z1と電機子端子U2、V2、W2とをそれぞれ短
絡板3で接続して高電圧(400V)としている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. The connection circuit between the generator 1 and the voltage switching terminal plate 2 is the same as that shown in FIG. That is, the voltage switching of the generator 1 is performed by connecting the armature terminals X1, Y1, Z1 connected to the inner ends of the respective outer coils 1b to the respective Os with the short-circuit plate 3, and connecting the armature terminals X1, Y1, Z1 to the outer ends of the respective outer coils 1b. The armature terminals U1, V1, W1 and U2, V2, W2 connected to the outer ends of the respective inner coils 1a are respectively connected to the short-circuit plate 3
And the armature terminals X1 and Y
1, Z1 and the armature terminals U2, V2, W2 are connected to each other by the short-circuit plate 3 to obtain a high voltage (400V).
【0016】そして、同期点検灯6は、電機子端子U1
から抵抗7aを介して接続されており、該抵抗7aと並
列してリレー接点12S1が設けられている。また、電機
子端子W1からは抵抗7b,7cが直列に接続されて同
期スイッチ5へと接続され、抵抗7bと並列してリレー
接点12S2が設けられている。The synchronous check lamp 6 is connected to the armature terminal U1.
Through a resistor 7a, and a relay contact 12S1 is provided in parallel with the resistor 7a. Further, from the armature terminal W1, resistors 7b and 7c are connected in series and connected to the synchronous switch 5, and a relay contact 12S2 is provided in parallel with the resistor 7b.
【0017】また、発電機の外側コイル1bの内端(X
1)から内側コイル1aの外端(U2)へ配線され、こ
こに同期スイッチ5と連動して開閉する補助接点5sと
電磁継電器12が直列に設けられている。そして、電磁
継電器12が励磁されると上記リレー接点12S1、12
S2が共にONとなる。The inner end of the outer coil 1b of the generator (X
From 1) to the outer end (U2) of the inner coil 1a, an auxiliary contact 5s that opens and closes in conjunction with the synchronous switch 5 and an electromagnetic relay 12 are provided in series. When the electromagnetic relay 12 is excited, the relay contacts 12 S1 and 12 S1
S2 is turned ON.
【0018】このように構成されているので、電圧切替
端子板2で電機子端子U1、V1、W1と電機子端子U
2、V2、W2とが短絡板3で接続され(図3(a)の
状態)ている低電圧の状態で並列運転を行う場合には、
同期スイッチ5の投入によって補助接点5sがONとな
って電磁継電器12が励磁され、リレー接点12S1およ
びリレー接点12S2が共にONになるので、同期点検灯
6へは電機子端子U1からリレー接点12S1を通って通
電される。 一方、電機子端子X1、Y1、Z1と電機
子端子U2、V2、W2が短絡板3で接続され(図3
(b)の状態)ている高電圧の状態で並列運転を行う場
合には、同期スイッチ5の投入によって補助接点5sが
ONとなるが、電磁継電器12は励磁されず、リレー接
点12S1およびリレー接点12S2はOFFのままである
ので、同期点検灯6へは電機子端子U1から抵抗7aを
通って通電される。With such a configuration, the armature terminals U1, V1, W1 and the armature terminals U
2, V2, and W2 are connected by the short-circuit plate 3 (the state of FIG. 3A), and when the parallel operation is performed in a low voltage state,
When the synchronous switch 5 is turned on, the auxiliary contact 5s is turned on, the electromagnetic relay 12 is excited, and both the relay contact 12 S1 and the relay contact 12 S2 are turned on. Power is supplied through 12 S1 . On the other hand, the armature terminals X1, Y1, Z1 and the armature terminals U2, V2, W2 are connected by the short-circuit plate 3 (FIG. 3).
When the parallel operation is performed in the high voltage state (state (b)), the auxiliary contact 5s is turned on by turning on the synchronous switch 5, but the electromagnetic relay 12 is not excited, and the relay contact 12 S1 and the relay Since the contact 12 S2 remains OFF, the synchronous check lamp 6 is energized from the armature terminal U1 through the resistor 7a.
【0019】[0019]
【発明の効果】本発明は、以上説明したように、並列運
転の同期投入のために使用される同期点検灯を電圧切替
端子板から抵抗を介して接続し、低電圧時に同期スイッ
チと連動して励磁される電磁継電器を設けるとともに該
電磁継電器のリレー接点を該抵抗と並列に設けて低電圧
時には該抵抗を介さずに同期点検灯へ通電するようにし
たので、電圧切替端子板で短絡板を組替えて発電電圧を
切替えると、自動的に同期点検灯への回路電圧が切替わ
ることとなり、短絡板の切替取付作業では当該発電機が
並列運転されるか否か関係なく行え、また、そのための
特別な作業を行う必要がない。したがって、従来のよう
に同期点検灯回路の電圧の確認をするとか、補助端子の
破損という問題は発生することがない。As described above, according to the present invention, the synchronous check lamp used for the synchronous turning on of the parallel operation is connected from the voltage switching terminal plate via the resistor, and interlocks with the synchronous switch when the voltage is low. And a relay contact of the electromagnetic relay is provided in parallel with the resistor so as to energize the synchronous check lamp without passing through the resistor when the voltage is low. When the power generation voltage is switched by rearranging the circuit, the circuit voltage to the synchronous check light is automatically switched, and the switching work of the short-circuit plate can be performed regardless of whether the generators are operated in parallel or not. There is no need to do any special work. Therefore, there is no problem that the voltage of the synchronous check lamp circuit is checked or the auxiliary terminal is damaged unlike the related art.
【図1】本発明の実施形態としてのエンジン発電機の切
替装置の一例を示す回路図である。FIG. 1 is a circuit diagram showing an example of an engine generator switching device according to an embodiment of the present invention.
【図2】従来のエンジン発電機の切替装置の回路図であ
る。FIG. 2 is a circuit diagram of a conventional engine generator switching device.
【図3】同電圧切替端子板の切替接続図で、(a)は低
電圧時を、(b)は高電圧時を示す図である。3A and 3B are switching connection diagrams of the voltage switching terminal plate, in which FIG. 3A shows a low voltage state and FIG. 3B shows a high voltage state.
【図4】同電圧切替端子板2の具体的例を示す平面図と
正面図である。FIG. 4 is a plan view and a front view showing a specific example of the voltage switching terminal plate 2;
1…発電機 1a…内側コイル 1b…外側コイル 2…電圧切替端子板 3…短絡板 5…同期スイッチ 5s…補助接点 6…同期点検灯 7a、7b、7c…抵抗 8…補助端子 10…遮断機 12…電磁継電器 12S1、12S2…リレー接点 14…抵抗DESCRIPTION OF SYMBOLS 1 ... Generator 1a ... Inner coil 1b ... Outer coil 2 ... Voltage switching terminal board 3 ... Short circuit board 5 ... Synchronous switch 5s ... Auxiliary contact 6 ... Synchronous check lamp 7a, 7b, 7c ... Resistance 8 ... Auxiliary terminal 10 ... Breaker 12: Electromagnetic relay 12 S1 , 12 S2 : Relay contact 14: Resistance
───────────────────────────────────────────────────── フロントページの続き Fターム(参考) 5G060 AA05 AA08 BA02 CA11 CB06 DA03 5H590 AA08 CA07 CC01 CC18 CC24 CC32 CC34 DD23 EA07 EA14 FC21 FC25 GA02 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5G060 AA05 AA08 BA02 CA11 CB06 DA03 5H590 AA08 CA07 CC01 CC18 CC24 CC32 CC34 DD23 EA07 EA14 FC21 FC25 GA02
Claims (1)
切替端子板の短絡板を直列に接続して高電圧を、並列に
接続して低電圧を発生するようにしたエンジン発電機に
おいて、並列運転の同期投入のための同期点検灯を該電
圧切替端子板から抵抗を介して接続し、低電圧時に同期
スイッチと連動して励磁される電磁継電器を設けるとと
もに該電磁継電器のリレー接点を該抵抗と並列に設けて
低電圧時には該抵抗を介さずに同期点検灯へ通電するよ
うにしたことを特徴とするエンジン発電機の電圧切替装
置。1. An engine generator comprising two independent sets of armature coils, wherein short-circuit plates of voltage switching terminal plates are connected in series to generate a high voltage, and connected in parallel to generate a low voltage. A synchronous check lamp for synchronously turning on the parallel operation is connected from the voltage switching terminal plate via a resistor, an electromagnetic relay that is excited in conjunction with the synchronous switch at low voltage is provided, and a relay contact of the electromagnetic relay is connected. A voltage switching device for an engine generator, wherein a current is supplied to a synchronous check lamp without the intervention of a resistor when the voltage is low, provided in parallel with the resistor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10359213A JP2000184796A (en) | 1998-12-17 | 1998-12-17 | Voltage switching device for engine generator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10359213A JP2000184796A (en) | 1998-12-17 | 1998-12-17 | Voltage switching device for engine generator |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2000184796A true JP2000184796A (en) | 2000-06-30 |
Family
ID=18463344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10359213A Pending JP2000184796A (en) | 1998-12-17 | 1998-12-17 | Voltage switching device for engine generator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2000184796A (en) |
-
1998
- 1998-12-17 JP JP10359213A patent/JP2000184796A/en active Pending
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