JP4425004B2 - Voltage regulator for AC equipment - Google Patents

Voltage regulator for AC equipment Download PDF

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JP4425004B2
JP4425004B2 JP2004010735A JP2004010735A JP4425004B2 JP 4425004 B2 JP4425004 B2 JP 4425004B2 JP 2004010735 A JP2004010735 A JP 2004010735A JP 2004010735 A JP2004010735 A JP 2004010735A JP 4425004 B2 JP4425004 B2 JP 4425004B2
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voltage regulator
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和郎 河邊
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電光工業株式会社
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本発明は、交流機器の始動時に印加する電圧を調整する交流機器用電圧調整装置に関するものである。   The present invention relates to a voltage regulator for an AC device that adjusts a voltage applied when the AC device is started.

リアクタンスを主体とする交流機器、たとえば誘導電動機では、図４に示すように回転数が上昇するに連れ始動電流は減少し、その減少割合は回転数が運転時の１００％に近づくと大きくなる。一方トルクは図５に示すように回転数が運転時の１００％に近づくと急激に増加する始動特性を備えている。この図４および図５に示す始動特性曲線から理解されるように、交流機器の始動に際し当初から定格の１００％の電圧を印加すると、過大な電流が流れるとともに過大なトルクを発生し、誘導電動機を駆動源とする機械に悪影響を及ぼす場合がある。   In an AC device whose main component is reactance, for example, an induction motor, as shown in FIG. 4, the starting current decreases as the rotational speed increases, and the reduction rate increases as the rotational speed approaches 100% during operation. On the other hand, the torque has a starting characteristic that rapidly increases as the rotational speed approaches 100% during operation, as shown in FIG. As understood from the starting characteristic curves shown in FIG. 4 and FIG. 5, when a voltage of 100% of the rated voltage is applied from the beginning when the AC device is started, an excessive current flows and an excessive torque is generated. May be adversely affected on machines that use a power source.

このような悪影響を避けるために交流機器の始動に際し、当初定格電圧よりも低い電圧を印加して、その電圧を順に高める始動方法が採用されており、その始動方法を実現する機器としてスターデルタ始動器、起動補償器、リアクトル始動器などが知られている。   In order to avoid such adverse effects, when starting AC equipment, a starting method is adopted in which a voltage lower than the initially rated voltage is applied and the voltage is increased in order. Devices, start compensators, reactor starters and the like are known.

図６は、リアクトル始動器による交流機器用電圧調整装置の一例の構成を示すもので、１は閉磁路を構成する鉄心で、上段、中段および下段の三本のヨークを並設し、その両端のそれぞれに二本の脚鉄を並設して日字型の閉磁路に構成されている。上段ヨークと中段ヨークの間に位置する一方の脚鉄に第１の一次巻線Ｔ1が巻回され、他方の脚鉄に第１の二次巻線Ｔ１１が巻回されている。また、中段ヨークと下段ヨークの間に位置する一方の脚鉄に第２の一次巻線Ｔ２が巻回され、他方の脚鉄に第２の二次巻線Ｔ２２が巻回されている。 FIG. 6 shows an example of the configuration of a voltage regulator for an AC device using a reactor starter. Reference numeral 1 denotes an iron core that forms a closed magnetic circuit, and three upper, middle, and lower yokes are arranged in parallel. Two leg bars are juxtaposed to each other to form a closed-loop magnetic circuit. The first primary winding T 1 is wound on one leg of which is located between the upper yoke and the middle yoke, the first secondary winding T 11 is wound around the other leg of. The second primary winding T 2 is wound on one leg of which is located between the middle yoke and the lower yoke, the second secondary winding T 22 is wound around the other leg of .

第１の二次巻線Ｔ１１は、第１の一次巻線Ｔ１と逆向きに巻回され、電磁接触器などのスイッチＳＷ１を介して第１の一次巻線Ｔ１と並列に接続されている。同様に第２の二次巻線Ｔ２２は、第２の一次巻線Ｔ２と逆向きに巻回され、電磁接触器などのスイッチング素子ＳＷ２を介して第２の一次巻線Ｔ２と並列に接続されている。第１の一次巻線Ｔ１と第２の一次巻線Ｔ２は直列に接続され、直列に接続された一次巻線の直列回路の一端は電磁接触器などのスイッチＳＷを介して交流電源に接続され、他端は誘導電動機などの交流機器２に接続されている。 First secondary winding T 11 is wound around the first primary winding T 1 and opposite, the first primary winding T 1 and connected in parallel via the switch SW 1 such as an electromagnetic contactor Has been. The second secondary winding T 22 Similarly, wound in a second primary winding T 2 and opposite, a second primary winding T 2 via the switching element SW 2 such as an electromagnetic contactor Connected in parallel. The first primary winding T 1 and the second primary winding T 2 is connected in series, one end of the series circuit of a primary winding connected in series to the AC power source through a switch SW such as an electromagnetic contactor The other end is connected to an AC device 2 such as an induction motor.

このように構成した電圧調整装置で交流機器２を運転するとき、スイッチＳＷ１、ＳＷ２を開放した状態で、スイッチング素子ＳＷが投入される。この投入で交流機器２に一次巻線Ｔ１、Ｔ２の直列回路を経て電力が供給される。すなわち、電源電圧に対して一次巻線Ｔ１、Ｔ２の直列回路で降下した定格電圧のたとえば５０％の低電圧が交流機器２に印加され、図４に示すように交流機器２に流れる電流および図５に示すように交流機器２が発生するトルクを抑制する。この印加で交流機器２に流れる電流が急減するタイミングでスイッチＳＷ２を投入する。この投入で第２の二次巻線Ｔ２２に電流が流れ、その電流により発生する磁束により、第２の一次巻線Ｔ２で発生している磁束を打ち消し、第２の一次巻線Ｔ２および第２の二次巻線Ｔ２２のリアクタンスを消滅させ、その分電圧降下が低減し、交流機器２に印加する電圧が図４に示すように定格電圧の７０％の電圧に上昇させる。 When operating the AC device 2 with the voltage regulator configured as described above, the switching element SW is turned on with the switches SW 1 and SW 2 opened. By this charging, power is supplied to the AC device 2 through a series circuit of the primary windings T 1 and T 2 . That is, a low voltage of, for example, 50% of the rated voltage dropped in the series circuit of the primary windings T 1 and T 2 with respect to the power supply voltage is applied to the AC device 2, and the current flowing through the AC device 2 as shown in FIG. As shown in FIG. 5, the torque generated by the AC device 2 is suppressed. The applied current flowing through the AC device 2 turns on the switch SW 2 at the timing of rapid decrease. Magnetic flux this turned a current flows through the second secondary winding T 22, generated by the current, to cancel the magnetic flux that is generated in the second primary winding T 2, the second primary winding T 2 and the reactance extinguished the second secondary winding T 22, to reduce the divided voltage drop, the voltage applied to the AC device 2 is increased to 70% of the rated voltage, as shown in FIG.

この電圧上昇で交流機器２の電流が図４に示すように定格電圧の７０％の電圧を印加したときの特性にしたがい大きくなり、トルクも図５に示すように増加する。そして定格電圧の７０％の電圧を印加したときの特性にしたがい電流とトルクは減少する。この電流の減少中でトルクの増加中の所定のタイミングでスイッチング素子ＳＷ１を投入する。この投入で第１の二次巻線Ｔ１１に電流が流れ、その電流により発生する磁束により、第１の一次巻線Ｔ１で発生している磁束を打ち消し、第１の一次巻線Ｔ１および第１の二次巻線Ｔ１１のリアクタンスを消滅させ、その分電圧降下を更に低減し、交流機器２に印加する電圧を定格電圧の１００％の電源電圧に上昇させる。 With this voltage rise, the current of the AC device 2 increases according to the characteristics when a voltage of 70% of the rated voltage is applied as shown in FIG. 4, and the torque also increases as shown in FIG. The current and torque are reduced according to the characteristics when a voltage of 70% of the rated voltage is applied. At a predetermined timing during the increase in torque in decrease of the current turning on the switching element SW 1. The charged at a current flows through the first secondary winding T 11, the magnetic flux generated by the current, to cancel the magnetic flux that is generated in the first primary winding T 1, the first primary winding T 1 and the reactance extinguished the first secondary winding T 11, to reduce the divided voltage drop further, raising the voltage applied to the AC device 2 to 100% of the supply voltage of the rated voltage.

この電圧上昇で交流機器２の電流が図４に示すように定格電圧の１００％の電圧を印加したときの特性にしたがい大きくなり、トルクも図５に示すように増加する。そして定格電圧の１００％の電圧を印加したときの特性にしたがい電流とトルクは減少し、運転状態に移行する。なお、以上の説明は交流機器２に印加する電圧を、定格電圧のたとえば５０％、７０％、１００％と３段階で調整する場合であるが、リアクトル始動器を複数設け多段階で調整することもできる。
特公昭４４−２９５０３号公報 As the voltage rises, the current of the AC device 2 increases in accordance with the characteristics when 100% of the rated voltage is applied as shown in FIG. 4, and the torque also increases as shown in FIG. Then, according to the characteristics when 100% of the rated voltage is applied, the current and torque decrease, and the operation state is shifted. In addition, although the above description is a case where the voltage applied to AC apparatus 2 is adjusted in three steps, for example, 50%, 70%, and 100% of the rated voltage, a plurality of reactor starters are provided and adjusted in multiple steps. You can also.
Japanese Patent Publication No. 44-29503

以上のようなリアクトル始動器による電圧調整では、交流機器への電力供給を遮断することなく適切なタイミングで段階的に昇圧することができるので、その昇圧に際し発生する突入電流やトルクの変動幅が小さく、交流機器に与える衝撃を緩和することができる利点がある。しかし、リアクトルには常時に電流が流れ、この電流によりジュウル発熱（抵抗発熱）し、必要以上にエネルギーを消費する場合があるという問題があった。   In the voltage adjustment by the reactor starter as described above, it is possible to step up the voltage step by step at an appropriate timing without interrupting the power supply to the AC device. There is an advantage that the impact applied to the AC device can be reduced. However, there is a problem that current always flows through the reactor, and this current generates dew heat (resistance heat generation), which may consume more energy than necessary.

本発明が解決しようとする課題は、このようなリアクトル始動器を用いた電圧調整装置において、消費するエネルギーを低減し、斯かる問題を解消する点にある。   The problem to be solved by the present invention is to reduce the energy consumed in such a voltage regulator using a reactor starter and to solve such a problem.

本発明は、交流機器用電圧調整装置を、第１のリアクトルと、一次巻線および前記一次巻線で発生する磁束を第１のスイッチを介して打ち消す二次巻線とを備えてなる第２のリアクトルとを有し、前記第１のリアクトルと前記第２のリアクトルの一次巻線とを直列に接続してリアクトル直列回路を構成し、前記リアクトル直列回路の一端を電源に、他端を交流機器に接続するとともに、前記リアクトル直列回路と並列に第２のスイッチを設け、前記交流機器への電圧印加後の所定のタイミングで前記第１のスイッチを投入して前記一次巻線で発生する磁束を打ち消し、前記打ち消し後の所定のタイミングで前記第２のスイッチを投入して前記リアクトル直列回路を短絡してなることを最も主要な特徴とする。   A second aspect of the present invention is a voltage regulator for an AC device, comprising: a first reactor; a primary winding; and a secondary winding that cancels the magnetic flux generated in the primary winding via the first switch. The first reactor and the primary winding of the second reactor are connected in series to form a reactor series circuit, and one end of the reactor series circuit is used as a power source and the other end is AC. A magnetic flux generated in the primary winding by connecting the device and providing a second switch in parallel with the reactor series circuit and turning on the first switch at a predetermined timing after voltage application to the AC device. And the reactor series circuit is short-circuited by turning on the second switch at a predetermined timing after the cancellation.

本発明に係る交流機器用電圧調整装置は、交流機器の運転に際し、交流機器に第１のリアクトルと第２のリアクトルの一次巻線とを直列に接続したリアクトル直列回路の一端を電源に、他端を交流機器に接続し、第１および第２のスイッチを開放した状態で、交流機器に電源電圧よりも低い、たとえば５０％程度の低電圧を印加し、その後、第１のスイッチを投入し、第２のリアクトルのリアクタンスを消滅させて交流機器に印加する電圧を、たとえば定格電圧の７０パーセントに高め、ついで第２のスイッチを投入して、リアクトル直列回路を短絡し、交流機器に電源電圧の１００％の電圧を印加して交流機器の運転状態へ移行させる。   The voltage regulator for an AC device according to the present invention, when operating the AC device, uses one end of a reactor series circuit in which a first reactor and a primary winding of a second reactor are connected in series to the AC device as a power source, etc. With the end connected to the AC device and the first and second switches open, apply a low voltage, for example, about 50% lower than the power supply voltage to the AC device, and then turn on the first switch. Then, the reactance of the second reactor is extinguished and the voltage applied to the AC device is increased to, for example, 70% of the rated voltage, and then the second switch is turned on to short-circuit the reactor series circuit and supply the AC device with the power supply voltage. The voltage of 100% is applied to shift to the operating state of the AC device.

したがって、交流機器への電力供給を遮断することなく適切なタイミングで段階的に昇圧することができるので、その昇圧に際し発生する突入電流やトルクの変動幅が小さく、交流機器に与える衝撃を緩和することができるとともに、運転状態では、巻線直列回は短絡されており、リアクトル直列回路で発生するジュウル発熱（抵抗発熱）がなく、省エネルギーを図ることができる。   Therefore, the voltage can be boosted step by step at an appropriate timing without interrupting the power supply to the AC device, so that the fluctuation range of the inrush current and torque generated at the time of the voltage boost is small, and the impact on the AC device is reduced. In addition, in the operating state, the winding series is short-circuited, and there is no dew heat (resistance heat generation) generated in the reactor series circuit, so that energy saving can be achieved.

リアクタンスを段階的に減少して交流機器に印加する電圧を調整する電圧調整装置において、消費するエネルギーを低減する目的を、交流機器の運転状態への移行に際し、交流機器に接続したリアクトルを短絡することにより実現した。   In a voltage regulator that adjusts the voltage applied to the AC device by reducing the reactance step by step, the reactor connected to the AC device is short-circuited when the AC device is moved to the operating state for the purpose of reducing energy consumption. It was realized.

図１は本発明の実施例に係る交流機器用電圧調整装置の回路構成図、図２は図１に示す交流機器用電圧調整装置のタイミングチャートである。なお、この実施例で示す交流機器は図４および図５で示す特性曲線に沿う特性を備えた誘導電動機であり、図６に示す従来の交流機器用電圧調整装置と同様に、定格電圧の５０％（又は６０％）、７０％、１００％と３段階で調整する場合である。   FIG. 1 is a circuit configuration diagram of an AC device voltage regulator according to an embodiment of the present invention, and FIG. 2 is a timing chart of the AC device voltage regulator shown in FIG. The AC device shown in this embodiment is an induction motor having characteristics along the characteristic curves shown in FIGS. 4 and 5, and has a rated voltage of 50 as in the conventional voltage regulator for AC devices shown in FIG. 6. It is a case where it adjusts in 3 steps,% (or 60%), 70%, and 100%.

図１において、Ｌ１は第１のリアクトルで、本実施例では図６に示す第１の二次巻線Ｔ１１を省略し、第１の一次巻線Ｔ１のみで構成されている。Ｌ２は第２のリアクトルで、一次巻線Ｔ２と二次巻線Ｔ２２を有し、図６に示す第２の一次巻線Ｔ２と第２の二次巻線Ｔ２２と同様に閉磁路鉄心に巻回され、二次巻線Ｔ２２は、一次巻線Ｔ２と逆向きに巻回され、電磁接触器などのスイッチＳＷ２を介して一次巻線Ｔ２と並列に接続されている。ＳＷは電源投入用の電磁接触器などのスイッチ、ＳＷ３は切換スイッチ、ＳＷ４は電磁接触器などのスイッチ、２は交流機器（この例ではかご形誘導電動機）である。 In Figure 1, L 1 is constituted by a first reactor, in the present embodiment is omitted first secondary winding T 11 shown in FIG. 6, only the first of the primary winding T 1. L 2 is a second reactor, which has a primary winding T 2 and a secondary winding T 22, and is similar to the second primary winding T 2 and the second secondary winding T 22 shown in FIG. wound around the closed magnetic circuit iron core, the secondary winding T 22 is wound around the primary winding T 2 and opposite, are connected in parallel with the primary winding T 2 via the switch SW 2 such as an electromagnetic contactor ing. SW is a switch such as an electromagnetic contactor for power-on, SW 3 is changeover switch, SW4 is a switch such as an electromagnetic contactor, 2 AC devices (squirrel-cage induction motor in this example).

第１のリアクトルＬ１と第２のリアクトルＬ２の一次巻線Ｔ１は直列に接続され、この直列回路の一端は切換スイッチＳＷ３および電源投入用のスイッチＳＷを介して交流電源に接続され、他端は交流機器２に接続されている。スイッチＳＷ４はこのリアクトルの直列回路と切換スイッチＳＷ３からなる回路と並列に接続されている。第１のリアクトルＬ１には交流機器２に当初に印加する電圧を、電源電圧の５０％または６０％の電圧に設定するタップを備え、切換スイッチＳＷ３はこのタップを切換えて電源に接続するものである。 The first reactor L 1 and the primary winding T 1 of the second reactor L 2 are connected in series, one end of the series circuit is connected to an AC power supply via the switch SW 3 and switch SW of the power supply is turned on The other end is connected to the AC device 2. Switch SW 4 is connected in parallel with the circuit consisting of the series circuit and the changeover switch SW 3 of the reactor. The first reactor L 1 has a tap for setting the voltage initially applied to the AC device 2 to 50% or 60% of the power supply voltage, and the changeover switch SW 3 switches the tap to connect to the power source. Is.

このように構成した電圧調整装置で切換スイッチＳＷ３を第１のリアクトルＬ１の５０％のタップに接続して交流機器２を電源電圧の５０％の印加から運転するとき、スイッチＳＷ２、ＳＷ４を開放した状態で、図２のｔ１で示すようにスイッチＳＷが投入される。この投入で交流機器２に第１のリアクトルＬ１と第２のリアクトルＬ２の一次巻線Ｔ２のリアクトル直列回路を経て電力が供給される。すなわち、電源電圧に対してリアクトル直列回路で降下した電源電圧の５０％の低電圧が交流機器２に印加され、図４に示すように交流機器２に流れる電流および図５に示すように交流機器２が発生するトルクを抑制する。 When operating thus constituted a voltage regulator AC device 2 connects the switch SW 3 in the first 50% of the tap of the reactor L 1 at 50% of the applied power supply voltage, switch SW 2, SW 4 in the open state, the switch SW is turned as shown by t 1 in FIG. The turned in through the first reactor L 1 and second reactor the series circuit of the primary winding T 2 of the reactor L 2 into AC device 2 power is supplied. That is, a low voltage of 50% of the power supply voltage dropped in the reactor series circuit with respect to the power supply voltage is applied to the AC device 2, and the current flowing through the AC device 2 as shown in FIG. 4 and the AC device as shown in FIG. 2 suppresses the torque generated.

その後、交流機器２に流れる電流が急減する手前のタイミングで、図２のｔ２で示すようにスイッチＳＷ２を投入する。この投入で第２のリアクトルの二次巻線Ｔ２２に電流が流れ、その電流により発生する磁束により、一次巻線Ｔ２で発生している磁束を打ち消し、第２のリアクトルのリアクタンスを消滅させ、その分電圧降下を低減させ、交流機器２に印加する電圧が図４に示すように定格電圧の７０％の電圧に上昇させる。 Thereafter, before the timing when the current flowing through the AC device 2 rapidly decreases, turning on the switch SW 2 as shown in t 2 of FIG. The charged at a current flows through the second reactor of the secondary winding T 22, the magnetic flux generated by the current, to cancel the magnetic flux that is generated in the primary winding T 2, to eliminate the reactance of the second reactor Accordingly, the voltage drop is reduced, and the voltage applied to the AC device 2 is increased to 70% of the rated voltage as shown in FIG.

この電圧上昇で交流機器２の電流が図４に示すように定格電圧の７０％の電圧を印加したときの特性にしたがい大きくなり、トルクも図５に示すように増加する。そして定格電圧の７０％の電圧を印加したときの特性にしたがい電流とトルクは減少する。この電流の減少中でトルクの増加中の所定のタイミングで、図２のｔ３で示すようにスイッチＳＷ４を投入する。この投入でリアクトル直列回路と切換スイッチＳＷ３からなる回路は短絡し、交流機器２に１００％の電源電圧が印加され、運転状態へ移行する。運転を停止するときには、図２のｔ４で示すようにスイッチング素子ＳＷ、ＳＷ２、ＳＷ４を開放し、この状態で次の運転開始まで待機する。なお、切換スイッチＳＷ３を第１のリアクトルＬ１の６０％のタップに接続して交流機器２を電源電圧の６０％の印加から運転するときも基本的動作は同様である。また、図６に示すリアクトルを付加し、交流機器２に印加する電圧をさらに多段に調整することもできる。 With this voltage rise, the current of the AC device 2 increases according to the characteristics when a voltage of 70% of the rated voltage is applied as shown in FIG. 4, and the torque also increases as shown in FIG. The current and torque are reduced according to the characteristics when a voltage of 70% of the rated voltage is applied. At a predetermined timing during the increase in torque in decrease of the current, turning on the switch SW 4 as indicated by t 3 in Figure 2. The circuit consisting of a reactor the series circuit and the changeover switch SW 3 in turned on short, 100% of the power supply voltage into an AC device 2 is applied, the process proceeds to the operating state. When stopping the operation, the switching elements SW, SW 2 and SW 4 are opened as indicated by t 4 in FIG. 2, and the system waits until the next operation starts in this state. The basic operation is the same even when operating the AC device 2 connects the switch SW 3 in the first 60% of the tap of the reactor L 1 to 60% of the applied power supply voltage. Moreover, the reactor shown in FIG. 6 can be added and the voltage applied to AC apparatus 2 can also be adjusted in multistage.

図３は高圧で運転する交流機器に適する交流機器用電圧調整装置の回路構成図で、図１に示す電圧調整装置の回路構成と異なる点は、第２のリアクトルＬ２の二次巻線Ｔ２２を第２のリアクトルＬ２の一次巻線Ｔ２に接続せず、二次巻線Ｔ２２の中間を接地し、その両端間を短絡するスイッチＳＷ５を設け、このスイッチＳＷ５を図１に示す電圧調整装置の回路構成のスイッチＳＷ２と同様のタイミングで投入する点で、巻線間の絶縁性を高めたものである。このように構成してもスイッチＳＷ５の投入により、一次巻線Ｔ２で発生している磁束を打ち消し、第２のリアクトルＬ２のリアクタンスを消滅させることができる。なお、この実施例の全体の動作は、図１に示す電圧調整装置と同様であるので、ここではその詳細な説明は省略する。 FIG. 3 is a circuit configuration diagram of an AC device voltage regulator suitable for an AC device operating at a high voltage. The difference from the circuit configuration of the voltage regulator shown in FIG. 1 is that the secondary winding T of the second reactor L 2 is different. 22 not connected to the primary winding T 2 of the second reactor L 2, grounding the intermediate secondary winding T 22, the provided switch SW 5 for short-circuiting between both ends, Fig. 1 the switch SW 5 in that power up in the same timing as the switch SW 2 of the circuit configuration of the voltage regulator shown in, but with enhanced insulation between the windings. Thus the introduction of the switch SW 5 be constituted, cancel the magnetic flux that is generated in the primary winding T 2, it is possible to eliminate the second reactance of the reactor L 2. The overall operation of this embodiment is the same as that of the voltage regulator shown in FIG. 1, and therefore detailed description thereof is omitted here.

以上は、誘導電動機を例にして説明するものであるが、交流機器は誘導電動機に限らずたとえば電気誘導炉の誘導コイルなど各種交流機器のリアクタンス調整手段として適用できる。 The above is described by taking an induction motor as an example, but an AC device is not limited to an induction motor, and can be applied as reactance adjustment means for various AC devices such as an induction coil of an electric induction furnace.

本発明の実施例に係る交流機器用電圧調整装置の回路構成図である。（実施例１）It is a circuit block diagram of the voltage regulator for alternating current devices which concerns on the Example of this invention. Example 1 図１に示す交流機器用電圧調整装置の動作を示すタイミングチャートである。It is a timing chart which shows operation | movement of the voltage regulator for alternating current devices shown in FIG. 本発明の他の実施例に係る交流機器用電圧調整装置の回路構成図である。（実施例２）It is a circuit block diagram of the voltage regulator for alternating current devices which concerns on the other Example of this invention. (Example 2) 交流機器の始動電流特性曲線図である。It is a starting current characteristic curve figure of AC apparatus. 交流機器の始動トルク特性曲線図である。It is a starting torque characteristic curve figure of AC apparatus. 従来の交流機器用電圧調整装置の回路構成図である。It is a circuit block diagram of the conventional voltage regulator for alternating current devices.

符号の説明Explanation of symbols

１ 鉄心
２ 交流機器
Ｌ１ 第１のリアクトル
Ｌ２ 第２のリアクトル
Ｔ２ 第２のリアクトルの一次巻線
Ｔ２２ 第２のリアクトルの二次巻線
ＳＷ 運転用スイッチ
ＳＷ２、ＳＷ４、ＳＷ５ スイッチ
ＳＷ３ 切換スイッチ 1 core 2 AC devices L 1 first reactor L 2 second reactor T 2 second primary winding T 22 second reactor of the reactor of the secondary winding SW running switch SW 2, SW 4, SW 5 Switch SW 3 selector switch

Claims (3)

第１のリアクトルと、一次巻線および前記一次巻線で発生する磁束を第１のスイッチを介して打ち消す二次巻線とを備えてなる第２のリアクトルとを有し、前記第１のリアクトルと前記第２のリアクトルの一次巻線とを直列に接続してリアクトル直列回路を構成し、前記リアクトル直列回路の一端を電源に、他端を交流機器に接続するとともに、前記リアクトル直列回路と並列に第２のスイッチを設け、前記交流機器への電圧印加後の所定のタイミングで前記第１のスイッチを投入して前記一次巻線で発生する磁束を打ち消し、前記打ち消し後の所定のタイミングで前記第２のスイッチを投入して前記リアクトル直列回路を短絡してなることを特徴とする交流機器用電圧調整装置。   A first reactor, and a second reactor comprising a primary winding and a secondary winding that cancels the magnetic flux generated in the primary winding via a first switch, and the first reactor And a primary winding of the second reactor are connected in series to form a reactor series circuit, one end of the reactor series circuit is connected to a power source, the other end is connected to an AC device, and in parallel with the reactor series circuit The second switch is provided, and the first switch is turned on at a predetermined timing after voltage application to the AC device to cancel the magnetic flux generated in the primary winding, and at the predetermined timing after the cancellation A voltage regulator for AC equipment, wherein a second switch is turned on to short-circuit the reactor series circuit. 前記第２のリアクトルの二次巻線は一次巻線とスイッチを介して並列に接続してなり、前記スイッチング素子の投入により前記一次巻線で発生する磁束を打ち消してなることを特徴とする請求項１に記載の交流機器用電圧調整装置。   The secondary winding of the second reactor is connected in parallel with the primary winding through a switch, and the magnetic flux generated in the primary winding is canceled by turning on the switching element. Item 2. The voltage regulator for an AC device according to Item 1. 前記第２のリアクトルを複数有し、各第２のリアクトルの一次巻線を直列に接続するとともに、所定のタイミングで前記第１のリアクトルの二次巻線を順次投入して前記一次巻線で発生する磁束を順次打ち消してなることを特徴とする請求項１又は請求項２に記載の交流機器用電圧調整装置。   A plurality of the second reactors are provided, and the primary windings of the respective second reactors are connected in series, and the secondary windings of the first reactor are sequentially inserted at a predetermined timing so that the primary windings The voltage regulator for an AC device according to claim 1 or 2, wherein the generated magnetic flux is sequentially canceled.
JP2004010735A 2004-01-19 2004-01-19 Voltage regulator for AC equipment Expired - Fee Related JP4425004B2 (en)

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