JP2014180173A - Engine generator - Google Patents

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JP2014180173A
JP2014180173A JP2013053617A JP2013053617A JP2014180173A JP 2014180173 A JP2014180173 A JP 2014180173A JP 2013053617 A JP2013053617 A JP 2013053617A JP 2013053617 A JP2013053617 A JP 2013053617A JP 2014180173 A JP2014180173 A JP 2014180173A
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circuit
output operation
changeover switch
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JP6033133B2 (en
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Katsuaki Tanaka
克明 田中
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Nippon Sharyo Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an engine generator capable of improving operability when switching a high-voltage output operation and a low-voltage output operation.SOLUTION: An operation mode change-over switch 24 for switching a high-voltage output operation and a low-voltage output operation is provided with a resistance change-over switch 21 for switching a resistance of a circuit connected to a voltage adjusting variable resistor 18, and a voltage measuring circuit change-over switch 22 for switching a circuit connected to a voltmeter 26 in connection with each other and switchably. The resistance change-over switch switches a resistance value of the circuit connected to the voltage adjusting variable resistor during the high-voltage output operation and the low-voltage output operation. The voltage measuring circuit change-over switch connects two output ends U, V to the voltmeter in the high-voltage output operation, and connects the output end U and a neutral point O in the low-voltage output operation.

Description

本発明は、エンジン発電機に関し、詳しくは、電圧調整用可変抵抗器の抵抗値を調整することによって高電圧出力運転と低電圧出力運転とを切り替えて運転するエンジン発電機に関する。   The present invention relates to an engine generator, and more particularly to an engine generator that operates by switching a high voltage output operation and a low voltage output operation by adjusting a resistance value of a variable resistor for voltage adjustment.

可搬式のエンジン発電機は、設置場所に応じて様々な負荷に電力を供給しなければならないため、例えば、モータなどの動力用電源として使用される三相交流200Vの高電圧を出力する運転と、照明などの電灯用電源として使用される単相交流100Vの低電圧を出力する運転とを、同期発電機の巻線の接続状態を変更することによって切替可能に形成しているものが多い(例えば、特許文献1参照。)。   Since a portable engine generator must supply power to various loads depending on the installation location, for example, an operation of outputting a high voltage of 200V of three-phase AC used as a power source for a motor or the like; In many cases, the operation of outputting a low voltage of 100 V single-phase AC used as a power source for lighting such as lighting can be switched by changing the connection state of the windings of the synchronous generator ( For example, see Patent Document 1.)

特開2001−57764号公報Japanese Patent Laid-Open No. 2001-57664

一方、同期発電機の巻線の接続状態を変更することなく、三相四線式の同期発電機における出力端子の接続状態を変更するとともに、同期発電機の発電電圧を調整することにより、200Vの高電圧出力と100Vの低電圧出力とを切替可能であるが、100Vの低電圧出力を行う場合、同期発電機の発電電圧を173Vに設定する必要がある。このため、この種のエンジン発電機に慣れている操作員でなければ、出力端子から100Vを確実に出力することが困難なときがあった。   On the other hand, by changing the connection state of the output terminal in the three-phase four-wire synchronous generator without changing the connection state of the winding of the synchronous generator, and adjusting the generated voltage of the synchronous generator, 200V The high voltage output of 100 V and the low voltage output of 100 V can be switched. However, when the low voltage output of 100 V is performed, it is necessary to set the power generation voltage of the synchronous generator to 173 V. For this reason, there is a case where it is difficult to reliably output 100 V from the output terminal unless the operator is accustomed to this type of engine generator.

そこで本発明は、高電圧出力運転と低電圧出力運転とを切り替える際の操作性の向上を図ることができるエンジン発電機を提供することを目的としている。   Therefore, an object of the present invention is to provide an engine generator capable of improving operability when switching between a high voltage output operation and a low voltage output operation.

上記目的を達成するため、本発明のエンジン発電機は、出力端(U,V,W)及び中性点(O)を有する三相四線式の同期発電機と、該同期発電機の発電電圧を、電圧調整用可変抵抗器で設定した電圧に自動調整する電圧自動調整器と、出力電圧を検出して表示する電圧計と、出力端(U,V)間、出力端(V,W)間、出力端(U,W)間からそれぞれ高電圧を出力する高電圧出力運転と、出力端(U)と中性点(O)との間、出力端(V)と中性点(O)との間、出力端(W)と中性点(O)との間からそれぞれ低電圧を出力する低電圧出力運転とを、前記電圧調整用可変抵抗器の抵抗値を調整することによって切替可能としたエンジン発電機において、前記高電圧出力運転と前記低電圧出力運転とを切り替える運転モード切替スイッチを備え、該運転モード切替スイッチには、前記電圧調整用可変抵抗器に接続する回路の抵抗を切り替える抵抗切替スイッチと、前記電圧計に接続する回路を切り替える電圧測定回路切替スイッチとが連動して切替可能に設けられ、前記抵抗切替スイッチは、前記高電圧出力運転時と前記低電圧出力運転時とで前記電圧調整用可変抵抗器に接続する回路の抵抗値を切り替え、前記電圧測定回路切替スイッチは、前記高電圧出力運転時には任意の二つの出力端を前記電圧計に接続する回路に切り替え、前記低電圧出力運転時には任意の一つの出力端と中性点とを前記電圧計に接続する回路に切り替えることを特徴としている。   In order to achieve the above object, an engine generator according to the present invention includes a three-phase four-wire synchronous generator having an output end (U, V, W) and a neutral point (O), and power generation of the synchronous generator. A voltage automatic regulator that automatically adjusts the voltage to the voltage set by the variable resistor for voltage adjustment, a voltmeter that detects and displays the output voltage, and between the output terminals (U, V), the output terminals (V, W) ), Between the output terminals (U, W), a high voltage output operation that outputs a high voltage, between the output terminal (U) and the neutral point (O), between the output terminal (V) and the neutral point ( O), a low voltage output operation for outputting a low voltage from between the output terminal (W) and the neutral point (O), respectively, by adjusting the resistance value of the voltage adjusting variable resistor An operation mode changeover switch for switching between the high voltage output operation and the low voltage output operation in an engine generator that can be switched. The operation mode changeover switch is linked with a resistance changeover switch for changing the resistance of the circuit connected to the voltage adjusting variable resistor and a voltage measurement circuit changeover switch for changing the circuit connected to the voltmeter. The resistance changeover switch is configured to switch a resistance value of a circuit connected to the voltage adjusting variable resistor between the high voltage output operation and the low voltage output operation, and the voltage measurement circuit changeover switch is The high voltage output operation is switched to a circuit that connects any two output terminals to the voltmeter, and the low voltage output operation is a circuit that connects any one output terminal and a neutral point to the voltmeter. It is characterized by switching.

さらに、本発明のエンジン発電機は、前記同期発電機が、任意の一つの出力端に接続する巻線の中間位置と前記中性点とから補助低電圧電源を出力する回路を備えるとともに、前記運転モード切替スイッチは、前記抵抗切替スイッチ及び電圧測定回路切替スイッチに連動して切り替えられる補助低電圧電源切替スイッチを備え、該補助低電圧電源切替スイッチは、前記高電圧出力運転時には補助低電圧電源を出力可能な状態とし、前記低電圧出力運転時には、前記補助低電圧電源への出力を遮断することを特徴としている。   Furthermore, the engine generator of the present invention includes a circuit that outputs an auxiliary low-voltage power source from an intermediate position of the winding connected to any one output terminal and the neutral point, and the synchronous generator, The operation mode changeover switch includes an auxiliary low voltage power supply changeover switch that is switched in conjunction with the resistance changeover switch and the voltage measurement circuit changeover switch, and the auxiliary low voltage power supply changeover switch is connected to the auxiliary low voltage power supply during the high voltage output operation. Can be output, and during the low-voltage output operation, the output to the auxiliary low-voltage power supply is cut off.

また、前記抵抗切替スイッチは、前記高電圧出力運転時に前記電圧調整用可変抵抗器に接続する回路に直列に抵抗を挿入する回路に切り替え、前記低電圧出力運転時に前記電圧調整用可変抵抗器に接続する回路から前記抵抗を切り離す回路に切り替えるスイッチ、又は、前記高電圧出力運転時には前記電圧調整用可変抵抗器に接続する回路から前記抵抗を切り離す回路に切り替え、前記低電圧出力運転時に前記電圧調整用可変抵抗器に接続する回路に直列に抵抗を挿入する回路に切り替えるスイッチのいずれかのスイッチであることを特徴としている。   The resistance changeover switch is switched to a circuit that inserts a resistor in series with a circuit connected to the voltage adjusting variable resistor during the high voltage output operation, and is switched to the voltage adjusting variable resistor during the low voltage output operation. Switch for switching to a circuit for disconnecting the resistor from a circuit to be connected, or switching to a circuit for disconnecting the resistor from a circuit for connecting to the variable resistor for voltage adjustment during the high-voltage output operation, and adjusting the voltage during the low-voltage output operation One of the switches that switches to a circuit in which a resistor is inserted in series with the circuit connected to the variable resistor for use.

本発明のエンジン発電機によれば、運転モード切替スイッチを切り替えた際に、電圧調整用可変抵抗器に直列に抵抗を挿入したり、抵抗を切り離したりして電圧調整用可変抵抗器に接続する回路の抵抗を切り替えることにより、電圧調整用可変抵抗器を大きく操作しなくても、電圧自動調整器の設定電圧を高電圧用、低電圧用の設定電圧に自動的に調整することができ、かつ、一つの電圧調整用可変抵抗器により、高圧側及び低圧側それぞれの電圧の微調整が可能となる。また、電圧計に接続する回路を切り替えることにより、電圧計の表示を高電圧用、低電圧用の表示に自動的に切り替えることができる。したがって、運転モード切替スイッチを切り換えるだけで、高電圧出力運転と低電圧出力運転とを容易かつ確実に切り替えることができる。また、高電圧出力運転時に補助低電圧電源を出力する回路を、低電圧出力運転時には遮断することにより、低電圧出力運転時における出力の安定化を図ることができる。   According to the engine generator of the present invention, when the operation mode changeover switch is switched, a resistor is inserted in series with the voltage adjusting variable resistor or the resistor is disconnected and connected to the voltage adjusting variable resistor. By switching the resistance of the circuit, the set voltage of the automatic voltage regulator can be automatically adjusted to the set voltage for high voltage and low voltage without greatly operating the variable resistor for voltage adjustment. In addition, it is possible to finely adjust the voltage on each of the high voltage side and the low voltage side with a single voltage adjusting variable resistor. Further, by switching the circuit connected to the voltmeter, the display of the voltmeter can be automatically switched between the display for high voltage and the display for low voltage. Therefore, the high voltage output operation and the low voltage output operation can be easily and reliably switched by simply switching the operation mode changeover switch. Further, by shutting off the circuit that outputs the auxiliary low-voltage power supply during the high-voltage output operation during the low-voltage output operation, the output during the low-voltage output operation can be stabilized.

本発明のエンジン発電機における高電圧出力運転時の状態の一形態例を示す回路図である。It is a circuit diagram which shows one example of the state at the time of the high voltage output driving | operation in the engine generator of this invention. 同じく低電圧出力運転時の状態を示す回路図である。It is a circuit diagram which similarly shows the state at the time of a low voltage output driving | operation.

本形態例に示すエンジン発電機は、図示しないエンジンによって駆動される同期発電機11を備えている。なお。以下の説明では、高電圧を三相交流200V、低電圧を単相交流100Vとして説明する。   The engine generator shown in this embodiment includes a synchronous generator 11 driven by an engine (not shown). Note that. In the following description, a high voltage is described as a three-phase AC 200V, and a low voltage is described as a single-phase AC 100V.

この同期発電機11は、3個の電機子巻線X,Y,Zを中性点Oに対してY型に結線した三相四線式であって、各電機子巻線X,Y,Zの出力端U,V,W及び前記中性点Oには、主電源用遮断器12を介して主出力端子13u,13v,13w,13oがそれぞれ接続されている。また、一つの電機子巻線Xの中間位置には、補助低電圧電源出力用の補助端子U3が設けられており、この補助端子U3と前記中性点Oとには、補助低電圧電源用遮断器14を介して補助出力端子15u,15oが接続されている。   The synchronous generator 11 is a three-phase four-wire system in which three armature windings X, Y, and Z are connected in a Y shape to a neutral point O, and each armature winding X, Y, Main output terminals 13u, 13v, 13w, and 13o are connected to the output terminals U, V, and W of Z and the neutral point O through a main power circuit breaker 12, respectively. In addition, an auxiliary terminal U3 for auxiliary low voltage power supply output is provided at an intermediate position of one armature winding X. The auxiliary terminal U3 and the neutral point O are connected to an auxiliary low voltage power supply. Auxiliary output terminals 15u and 15o are connected via the circuit breaker 14.

さらに、同期発電機11には、界磁巻線16の電流を調節することによって同期発電機11の発電電圧をあらかじめ設定された設定電圧に自動調整する自動電圧調整器(AVR)17が設けられており、該自動電圧調整器17には、設定電圧を調節するための電圧調整用可変抵抗器18が設けられている。なお、本形態例では、電圧調整用可変抵抗器の抵抗値と同期発電機の発電電圧との関係が自乗比例関係又は比例関係にある自動電圧調整器を用いている。   Further, the synchronous generator 11 is provided with an automatic voltage regulator (AVR) 17 that automatically adjusts the generated voltage of the synchronous generator 11 to a preset voltage by adjusting the current of the field winding 16. The automatic voltage regulator 17 is provided with a voltage adjusting variable resistor 18 for adjusting the set voltage. In this embodiment, an automatic voltage regulator is used in which the relationship between the resistance value of the voltage adjusting variable resistor and the generated voltage of the synchronous generator is a square proportional relationship or a proportional relationship.

このような基本構成を有するエンジン発電機において、本形態例では、抵抗切替スイッチ21、電圧測定回路切替スイッチ22及び補助低電圧電源切替スイッチ23を連動して切替可能な運転モード切替スイッチ24が設けられており、運転モード切替スイッチ24を高電圧出力運転、すなわち、三相交流200Vを出力する運転に切り替えたときには、図1に示すように、各スイッチ21,22,23が高電圧側に切り替わり、運転モード切替スイッチ24を低電圧出力運転、すなわち、単相100Vを出力する運転に切り替えたときには、図2に示すように、各スイッチ21,22,23が低電圧側に切り替わる。   In the engine generator having such a basic configuration, in this embodiment, there is provided an operation mode changeover switch 24 that can switch the resistance changeover switch 21, the voltage measurement circuit changeover switch 22, and the auxiliary low voltage power supply changeover switch 23 in conjunction with each other. When the operation mode changeover switch 24 is switched to high voltage output operation, that is, operation that outputs three-phase AC 200V, as shown in FIG. 1, the switches 21, 22, and 23 are switched to the high voltage side. When the operation mode changeover switch 24 is switched to the low voltage output operation, that is, the operation of outputting the single-phase 100V, the switches 21, 22, and 23 are switched to the low voltage side as shown in FIG.

図1に示す高電圧出力運転時における前記抵抗切替スイッチ21は、前記電圧調整用可変抵抗器18に接続する回路18aに抵抗25を直列に挿入する抵抗挿入回路25a側に切り替わり、前記電圧測定回路切替スイッチ22は、電圧計26に接続する一方の電圧測定回路26aが出力端Vに接続する回路26v側に切り替わり、補助低電圧電源切替スイッチ23は、前記補助端子U3及び前記中性点Oと前記補助低電圧電源用遮断器14との間に設けられた接点23aを閉じて接続した状態に切り替わる。   In the high voltage output operation shown in FIG. 1, the resistance changeover switch 21 is switched to a resistance insertion circuit 25a side in which a resistor 25 is inserted in series with a circuit 18a connected to the voltage adjusting variable resistor 18, and the voltage measurement circuit The changeover switch 22 is switched to the circuit 26v side where one voltage measurement circuit 26a connected to the voltmeter 26 is connected to the output terminal V, and the auxiliary low voltage power supply changeover switch 23 is connected to the auxiliary terminal U3 and the neutral point O. The contact 23a provided between the auxiliary low-voltage power supply circuit breaker 14 is closed and switched to a connected state.

電圧調整用可変抵抗器18に接続する回路18aに直列に抵抗25が挿入されることにより、電圧調整用可変抵抗器18を通る全体の回路の抵抗値が、電圧調整用可変抵抗器18の中間位置で同期発電機11の発電電圧を200Vにするのに適した抵抗値になるため、電圧調整用可変抵抗器18を殆ど調整することなく、自動電圧調整器17が出力電圧検出回路27を介して検出した出力端U,Wの電圧が200Vになるように、界磁巻線16の電流を自動的に調整する。これにより、出力端(U,V)間、出力端(V,W)間、出力端(U,W)間に、それぞれ交流200Vが出力され、中性点Oと各出力端U,V,Wとの間に交流115Vがそれぞれ出力され、さらに、補助端子U3と前記中性点Oとの間には、交流100Vが出力される。   By inserting the resistor 25 in series with the circuit 18 a connected to the voltage adjusting variable resistor 18, the resistance value of the entire circuit passing through the voltage adjusting variable resistor 18 is intermediate between the voltage adjusting variable resistor 18. Since the resistance value is suitable for setting the power generation voltage of the synchronous generator 11 to 200 V at the position, the automatic voltage regulator 17 passes through the output voltage detection circuit 27 without almost adjusting the voltage adjusting variable resistor 18. The current of the field winding 16 is automatically adjusted so that the detected voltage at the output terminals U and W becomes 200V. As a result, AC 200 V is output between the output terminals (U, V), between the output terminals (V, W), and between the output terminals (U, W), and the neutral point O and each of the output terminals U, V, An AC voltage of 115V is output between the auxiliary terminal U3 and the neutral point O, and an AC voltage of 100V is output between the auxiliary terminal U3 and the neutral point O.

これにより、主出力端子13u,13v、13w,13oからモータなどの動力用として三相四線式の交流200Vを供給することができ、補助低電圧電源用遮断器14を投入することにより、補助出力端子15u,15oから照明などの電灯用として単相交流100Vを供給することができる。   As a result, a three-phase four-wire AC 200V can be supplied from the main output terminals 13u, 13v, 13w, 13o for the power of the motor and the like. Single-phase AC 100V can be supplied from the output terminals 15u, 15o for lighting such as lighting.

また、電圧計26は、他方の電圧測定回路26bが出力端Uに常時接続された状態になっているため、出力端Vに接続する回路26vに接続した一方の電圧測定回路26aと他方の電圧測定回路26bとによって出力端(U,V)間の電圧、すなわち、200Vを測定することになるので、電圧計26の表示は200Vを示すことになる。したがって、運転モード切替スイッチ24を、200Vを出力する高電圧出力運転に切り替えたときは、電圧計26の表示が200Vになるように電圧調整用可変抵抗器18を調整することにより、主出力端子13u,13v、13w,13oにおける電圧を200Vに、補助出力端子15u,15oにおける電圧を100Vに、それぞれ調整することができる。   In the voltmeter 26, since the other voltage measuring circuit 26b is always connected to the output terminal U, one voltage measuring circuit 26a connected to the circuit 26v connected to the output terminal V and the other voltage are connected. Since the voltage between the output terminals (U, V), that is, 200 V is measured by the measurement circuit 26b, the display of the voltmeter 26 indicates 200V. Therefore, when the operation mode changeover switch 24 is switched to the high voltage output operation for outputting 200 V, the main output terminal is adjusted by adjusting the voltage adjusting variable resistor 18 so that the display of the voltmeter 26 becomes 200 V. The voltages at 13u, 13v, 13w, and 13o can be adjusted to 200V, and the voltages at the auxiliary output terminals 15u and 15o can be adjusted to 100V, respectively.

一方、運転モード切替スイッチ24を低電圧出力運転、すなわち、主出力端子13u,13v、13w,13oから単相100Vを出力する運転に切り替えたときには、図2に示すように、前記抵抗切替スイッチ21は、前記電圧調整用可変抵抗器18に接続する回路18aが抵抗を設けていない回路25bに接続した状態に切り替わり、前記電圧測定回路切替スイッチ22は、電圧計26に接続する一方の電圧測定回路26aが中性点Oに接続する回路26oに切り替わり、補助低電圧電源切替スイッチ23は、接点23aを開放状態として前記補助端子U3及び前記中性点Oと前記補助低電圧電源用遮断器14とを遮断した状態に切り替わる。   On the other hand, when the operation mode changeover switch 24 is switched to the low voltage output operation, that is, the operation of outputting the single-phase 100 V from the main output terminals 13u, 13v, 13w, 13o, as shown in FIG. Is switched to a state in which the circuit 18a connected to the voltage adjusting variable resistor 18 is connected to a circuit 25b not provided with a resistor, and the voltage measurement circuit switch 22 is one voltage measurement circuit connected to the voltmeter 26. 26a is switched to a circuit 26o connected to the neutral point O, and the auxiliary low voltage power supply changeover switch 23 opens the contact 23a, the auxiliary terminal U3, the neutral point O, the auxiliary low voltage power supply circuit breaker 14, It switches to the state which interrupted.

電圧調整用可変抵抗器18に接続する回路18aから前記抵抗25を切り離すことにより、電圧調整用可変抵抗器18を通る全体の回路の抵抗値が、電圧調整用可変抵抗器18の中間位置で同期発電機11の発電電圧を173Vにするのに適した抵抗値になるため、電圧調整用可変抵抗器18を殆ど調整することなく、自動電圧調整器17が出力電圧検出回路27を介して検出した出力端U,Wの電圧が173Vになるように、界磁巻線16の電流を自動的に調整する。これにより、出力端(U,V)間、出力端(V,W)間、出力端(U,W)間に、それぞれ交流173Vが出力され、出力端Uと中性点Oとの間、出力端Vと中性点Oとの間、出力端Wと中性点Oとの間からそれぞれ単相交流100Vが出力され、補助端子U3と前記中性点Oとの間には、単相交流87Vが出力される状態になる。   By disconnecting the resistor 25 from the circuit 18 a connected to the voltage adjusting variable resistor 18, the resistance value of the entire circuit passing through the voltage adjusting variable resistor 18 is synchronized at an intermediate position of the voltage adjusting variable resistor 18. Since the resistance value is suitable for setting the generated voltage of the generator 11 to 173 V, the automatic voltage regulator 17 detects the output voltage detection circuit 27 through the output voltage detection circuit 27 without adjusting the variable resistor 18 for voltage adjustment. The current of the field winding 16 is automatically adjusted so that the voltages at the output terminals U and W are 173V. Thereby, AC 173V is output between the output terminals (U, V), between the output terminals (V, W), and between the output terminals (U, W), respectively, and between the output terminal U and the neutral point O, A single-phase AC 100V is output between the output terminal V and the neutral point O, and between the output terminal W and the neutral point O, and between the auxiliary terminal U3 and the neutral point O, a single-phase current is output. AC 87V is output.

したがって、各主出力端子13u,13v、13w,13oをそれぞれ組み合わせて使用することにより、照明などの電灯用として単相交流100Vを供給することが可能となる。一方、各主出力端子から単相交流100Vを供給しているので、補助出力端子15u,15oからの低電圧出力は不要であることから、補助低電圧電源切替スイッチ23を開放することにより、補助低電圧電源用遮断器14を投入しても補助出力端子15u,15oへの出力が遮断されるため、補助端子U3と前記中性点Oとの間から電力を取り出した際の同期発電機11の発電効率の低下を生じることがなく、単相交流100Vと間違えて単相交流87Vを使用することもなくなる。これにより、同期発電機11を効率よく運転することができ、同期発電機11が有する発電能力に見合った単相交流100Vを供給することができる。   Accordingly, by using the main output terminals 13u, 13v, 13w, and 13o in combination, it is possible to supply a single-phase AC of 100V for lighting such as lighting. On the other hand, since the single-phase AC 100V is supplied from each main output terminal, the low voltage output from the auxiliary output terminals 15u and 15o is not necessary. Since the output to the auxiliary output terminals 15u and 15o is cut off even when the low voltage power supply circuit breaker 14 is turned on, the synchronous generator 11 when power is taken out between the auxiliary terminal U3 and the neutral point O is used. The power generation efficiency is not lowered, and the single-phase AC 87V is not mistaken for the single-phase AC 100V. Thereby, the synchronous generator 11 can be operated efficiently, and single-phase alternating current 100V commensurate with the power generation capability of the synchronous generator 11 can be supplied.

また、電圧計26は、出力端Uに常時接続された他方の電圧測定回路26bと、中性点Oに接続する回路26oに接続した一方の電圧測定回路26aとによって出力端Vと中性点Oとの間の電圧である100Vを測定することになるので、電圧計26の表示は100Vを示すことになる。したがって、運転モード切替スイッチ24を、100Vを出力する低電圧出力運転に切り替えたときは、電圧計26の表示が100Vになるように電圧調整用可変抵抗器18を調整することにより、各主出力端子13u,13v、13wと中性点からの主出力端子13oとの間の電圧を100Vに調整することができる。   The voltmeter 26 includes an output terminal V and a neutral point by the other voltage measurement circuit 26b always connected to the output terminal U and one voltage measurement circuit 26a connected to the circuit 26o connected to the neutral point O. Since 100V, which is the voltage between the voltmeter and O, is measured, the display of the voltmeter 26 indicates 100V. Therefore, when the operation mode changeover switch 24 is switched to the low voltage output operation for outputting 100V, each main output is adjusted by adjusting the voltage adjusting variable resistor 18 so that the display of the voltmeter 26 becomes 100V. The voltage between the terminals 13u, 13v, 13w and the main output terminal 13o from the neutral point can be adjusted to 100V.

このように、運転モードを高電圧、低電圧に切り替える際に、自動電圧調整器17の電圧調整用可変抵抗器18を通る回路の抵抗値を切り替えるとともに電圧計26に接続する回路を切り替えることにより、電圧調整用可変抵抗器18を大きく操作することなく、電圧計26の表示を見ながら電圧調整用可変抵抗器18を僅かに調整することにより、出力を200V又は100Vに容易かつ確実に設定することができる。また、100V出力時に不要となる補助出力を遮断することにより、発電機11を効率よく運転することができる。   As described above, when the operation mode is switched between the high voltage and the low voltage, the resistance value of the circuit passing through the voltage adjusting variable resistor 18 of the automatic voltage regulator 17 is switched and the circuit connected to the voltmeter 26 is switched. The output can be easily and reliably set to 200 V or 100 V by slightly adjusting the voltage adjusting variable resistor 18 while observing the display of the voltmeter 26 without greatly operating the voltage adjusting variable resistor 18. be able to. Moreover, the generator 11 can be efficiently operated by cutting off the auxiliary output that is not required at the time of 100 V output.

例えば、抵抗25を使用せずに電圧調整用可変抵抗器18のみで発電電圧を調整する場合、電圧調整用可変抵抗器18の抵抗値を80Ωにしたときに発電電圧が173Vになり、抵抗値を100Ωにしたときに発電電圧が200Vになるときには、200V出力と100V出力とで電圧調整用可変抵抗器18を80Ωと100Ωとに大きく調整しなければならないが、抵抗値が20Ωの抵抗25を使用するとともに、電圧調整用可変抵抗器18の中間的な抵抗値を80Ωに設定することにより、抵抗25を切り離したときには、電圧調整用可変抵抗器18の中間的な抵抗値が100V出力に対応した80Ωになり、抵抗25を直列に挿入したときには、電圧調整用可変抵抗器18を中間的な位置にしたままで200V出力に対応した抵抗値である100Ωになるので、電圧調整用可変抵抗器18の抵抗値を殆ど調整することなく、200V出力と100V出力とに対応することができる。   For example, when the generated voltage is adjusted only by the voltage adjusting variable resistor 18 without using the resistor 25, when the resistance value of the voltage adjusting variable resistor 18 is 80Ω, the generated voltage becomes 173V, and the resistance value When the generated voltage becomes 200 V when the resistance is set to 100Ω, the voltage adjusting variable resistor 18 must be largely adjusted to 80Ω and 100Ω with the 200V output and the 100V output, but the resistance 25 having a resistance value of 20Ω is required. In addition, when the resistor 25 is disconnected by setting the intermediate resistance value of the voltage adjusting variable resistor 18 to 80Ω, the intermediate resistance value of the voltage adjusting variable resistor 18 corresponds to 100V output. When the resistor 25 is inserted in series, the resistance value corresponds to a 200V output while the voltage adjusting variable resistor 18 is left in an intermediate position. Since the 00Omu, without substantially adjusting the resistance value of the voltage adjusting variable resistor 18, it can correspond to the 200V output and 100V output.

なお、電圧調整用可変抵抗器の抵抗値と同期発電機の発電電圧との関係が反比例関係にある自動電圧調整器を使用した場合は、自動電圧調整器17の電圧調整用可変抵抗器18を通る回路の抵抗値を高電圧出力運転では小さくし、低電圧出力運転では大きくなるように形成すればよく、例えば、前記形態例における抵抗切替スイッチ21を、低電圧出力運転では電圧調整用可変抵抗器18に接続する回路18aに直列に抵抗25を挿入する抵抗挿入回路25aに切り替え、高電圧出力運転では、抵抗25を切り離した回路25bに接続するように、逆方向に作動させればよい。   When an automatic voltage regulator is used in which the relation between the resistance value of the voltage adjusting variable resistor and the generated voltage of the synchronous generator is inversely proportional, the voltage adjusting variable resistor 18 of the automatic voltage regulator 17 is The resistance value of the circuit passing therethrough may be formed so as to be small in the high voltage output operation and large in the low voltage output operation. For example, the resistance changeover switch 21 in the above embodiment is a variable resistance for voltage adjustment in the low voltage output operation. Switching to the resistor insertion circuit 25a in which the resistor 25 is inserted in series with the circuit 18a connected to the device 18, and in the high voltage output operation, the resistor 25 may be operated in the reverse direction so as to be connected to the circuit 25b.

また、電圧調整用可変抵抗器18に直列に挿入する抵抗25は可変抵抗であってもよく、両抵抗挿入回路25a,25bに抵抗値が異なる抵抗や可変抵抗を設けておくこともできる。さらに、本形態例では、高電圧出力を200V、低電圧出力を100Vとして説明したが、他の電圧、例えば220Vと110Vとの関係でも同様である。   Further, the resistor 25 inserted in series with the voltage adjusting variable resistor 18 may be a variable resistor, and resistors and variable resistors having different resistance values may be provided in both resistor insertion circuits 25a and 25b. Further, in this embodiment, the high voltage output is described as 200 V and the low voltage output is set as 100 V, but the same applies to the relationship between other voltages, for example, 220 V and 110 V.

11…同期発電機、12…主電源用遮断器、13u,13v,13w,13o…主出力端子、14…補助低電圧電源用遮断器、15u,15o…補助出力端子、16…界磁巻線、17…自動電圧調整器、18…電圧調整用可変抵抗器、18a…回路、21…抵抗切替スイッチ、22…電圧測定回路切替スイッチ、23…補助低電圧電源切替スイッチ、23a…接点、24…運転モード切替スイッチ、25…抵抗、25a…抵抗挿入回路、25b…回路、26…電圧計、26a,26b…電圧測定回路、26v…回路、26o…回路、27…出力電圧検出回路、O…中性点、X,Y,Z…電機子巻線、U,V,W…出力端、U3…補助端子   DESCRIPTION OF SYMBOLS 11 ... Synchronous generator, 12 ... Main power circuit breaker, 13u, 13v, 13w, 13o ... Main output terminal, 14 ... Auxiliary low voltage power circuit breaker, 15u, 15o ... Auxiliary output terminal, 16 ... Field winding , 17 ... Automatic voltage regulator, 18 ... Variable resistor for voltage regulation, 18a ... Circuit, 21 ... Resistance changeover switch, 22 ... Voltage measurement circuit changeover switch, 23 ... Auxiliary low voltage power supply changeover switch, 23a ... Contact, 24 ... Operation mode changeover switch, 25 ... resistor, 25a ... resistor insertion circuit, 25b ... circuit, 26 ... voltmeter, 26a, 26b ... voltage measurement circuit, 26v ... circuit, 26o ... circuit, 27 ... output voltage detection circuit, O ... medium Sex point, X, Y, Z ... Armature winding, U, V, W ... Output end, U3 ... Auxiliary terminal

Claims (3)

出力端(U,V,W)及び中性点(O)を有する三相四線式の同期発電機と、該同期発電機の発電電圧を、電圧調整用可変抵抗器で設定した電圧に自動調整する電圧自動調整器と、出力電圧を検出して表示する電圧計と、出力端(U,V)間、出力端(V,W)間、出力端(U,W)間からそれぞれ高電圧を出力する高電圧出力運転と、出力端(U)と中性点(O)との間、出力端(V)と中性点(O)との間、出力端(W)と中性点(O)との間からそれぞれ低電圧を出力する低電圧出力運転とを、前記電圧調整用可変抵抗器の抵抗値を調整することによって切替可能としたエンジン発電機において、前記高電圧出力運転と前記低電圧出力運転とを切り替える運転モード切替スイッチを備え、該運転モード切替スイッチには、前記電圧調整用可変抵抗器に接続する回路の抵抗を切り替える抵抗切替スイッチと、前記電圧計に接続する回路を切り替える電圧測定回路切替スイッチとが連動して切替可能に設けられ、前記抵抗切替スイッチは、前記高電圧出力運転時と前記低電圧出力運転時とで前記電圧調整用可変抵抗器に接続する回路の抵抗値を切り替え、前記電圧測定回路切替スイッチは、前記高電圧出力運転時には任意の二つの出力端を前記電圧計に接続する回路に切り替え、前記低電圧出力運転時には任意の一つの出力端と中性点とを前記電圧計に接続する回路に切り替えることを特徴とするエンジン発電機。   A three-phase four-wire synchronous generator having an output terminal (U, V, W) and a neutral point (O), and the generated voltage of the synchronous generator are automatically set to a voltage set by a variable resistor for voltage adjustment. Automatic voltage regulator to adjust, voltmeter to detect and display output voltage, high voltage from output terminals (U, V), output terminals (V, W), output terminals (U, W) High voltage output operation, between output terminal (U) and neutral point (O), between output terminal (V) and neutral point (O), output terminal (W) and neutral point (O) In the engine generator that can switch between low voltage output operation for outputting a low voltage from each other by adjusting a resistance value of the voltage adjusting variable resistor, the high voltage output operation and An operation mode changeover switch for switching between the low voltage output operation is provided, and the voltage adjustment is included in the operation mode changeover switch. A resistance changeover switch for switching the resistance of the circuit connected to the variable resistor and a voltage measurement circuit changeover switch for switching the circuit connected to the voltmeter are provided to be able to be switched in conjunction with each other, and the resistance changeover switch includes the high voltage The resistance value of the circuit connected to the variable resistor for voltage adjustment is switched between the output operation and the low voltage output operation, and the voltage measurement circuit changeover switch switches between any two output terminals during the high voltage output operation. The engine generator is switched to a circuit connected to the voltmeter, and any one output end and neutral point is switched to a circuit connected to the voltmeter during the low-voltage output operation. 前記同期発電機は、任意の一つの出力端に接続する巻線の中間位置と前記中性点とから補助低電圧電源を出力する回路を備えるとともに、前記運転モード切替スイッチは、前記抵抗切替スイッチ及び電圧測定回路切替スイッチに連動して切り替えられる補助低電圧電源切替スイッチを備え、該補助低電圧電源切替スイッチは、前記高電圧出力運転時には補助低電圧電源を出力可能な状態とし、前記低電圧出力運転時には、前記補助低電圧電源への出力を遮断することを特徴とする請求項1記載のエンジン発電機。   The synchronous generator includes a circuit that outputs an auxiliary low-voltage power source from an intermediate position of a winding connected to any one output terminal and the neutral point, and the operation mode switch is the resistance switch And an auxiliary low voltage power source changeover switch that is switched in conjunction with the voltage measurement circuit changeover switch, the auxiliary low voltage power source changeover switch is in a state capable of outputting the auxiliary low voltage power source during the high voltage output operation, and the low voltage The engine generator according to claim 1, wherein an output to the auxiliary low-voltage power supply is cut off during an output operation. 前記抵抗切替スイッチは、前記高電圧出力運転時に前記電圧調整用可変抵抗器に接続する回路に直列に抵抗を挿入する回路に切り替え、前記低電圧出力運転時に前記電圧調整用可変抵抗器に接続する回路から前記抵抗を切り離す回路に切り替えるスイッチ、又は、前記高電圧出力運転時には前記電圧調整用可変抵抗器に接続する回路から前記抵抗を切り離す回路に切り替え、前記低電圧出力運転時に前記電圧調整用可変抵抗器に接続する回路に直列に抵抗を挿入する回路に切り替えるスイッチのいずれかのスイッチであることを特徴とする請求項1又は2記載のエンジン発電機。   The resistance changeover switch switches to a circuit in which a resistor is inserted in series with a circuit connected to the voltage adjustment variable resistor during the high voltage output operation, and is connected to the voltage adjustment variable resistor during the low voltage output operation. A switch for switching to a circuit that disconnects the resistor from a circuit, or a circuit that connects to the variable resistor for voltage adjustment during the high voltage output operation, and a circuit that disconnects the resistor from the circuit connected to the variable resistor for voltage adjustment, and the voltage adjustment variable during the low voltage output operation. 3. The engine generator according to claim 1, wherein the engine generator is one of a switch for switching to a circuit for inserting a resistor in series with a circuit connected to the resistor.
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CN109412479A (en) * 2018-11-09 2019-03-01 泰豪科技股份有限公司 A kind of generating set
JP7475957B2 (en) 2020-05-15 2024-04-30 北越工業株式会社 Engine-driven generator

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JP2006060933A (en) * 2004-08-20 2006-03-02 Denyo Co Ltd Digital automatic voltage adjuster
JP2011142736A (en) * 2010-01-07 2011-07-21 Nippon Sharyo Seizo Kaisha Ltd Portable engine generator

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JPH0380700U (en) * 1989-12-04 1991-08-19
JPH10117500A (en) * 1996-10-09 1998-05-06 Hitachi Ltd Synchronous generator controlling system and hybrid electric vehicle
JP2001028900A (en) * 1999-05-13 2001-01-30 Komatsu Ltd Apparatus and method for controlling voltage in engine generator
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109412479A (en) * 2018-11-09 2019-03-01 泰豪科技股份有限公司 A kind of generating set
JP7475957B2 (en) 2020-05-15 2024-04-30 北越工業株式会社 Engine-driven generator

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