JP2798033B2 - Drive device using induction motor and method of starting operation thereof - Google Patents
Drive device using induction motor and method of starting operation thereofInfo
- Publication number
- JP2798033B2 JP2798033B2 JP7350555A JP35055595A JP2798033B2 JP 2798033 B2 JP2798033 B2 JP 2798033B2 JP 7350555 A JP7350555 A JP 7350555A JP 35055595 A JP35055595 A JP 35055595A JP 2798033 B2 JP2798033 B2 JP 2798033B2
- Authority
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- Prior art keywords
- connection
- star
- delta
- induction motor
- stator winding
- 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.)
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Description
【０００１】[0001]
【産業上の利用分野】本発明は、２個の固定子と２個の
回転子とから構成する誘導電動機、または同一の負荷を
駆動する２台の誘導電動機による駆動装置とその始動運
転方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction motor composed of two stators and two rotors, or a drive device using two induction motors for driving the same load, and a method of starting and operating the same. .
【０００２】[0002]
【従来の技術】一般的に、負荷を駆動する誘導電動機の
簡便な始動方法は、直入れ始動とスタ−デルタ始動があ
る。この直入れ始動は、トルクが十分に発揮できる反
面、大容量電動機では始動時に大電流が流れ、このため
電気設備費は多大なものであった。また、スタ−デルタ
始動器によると、始動時の電流は低く抑えられるものの
それに伴い始動トルクも低減して始動トルクが低下した
分、大型の誘導電動機を採用することになり電動機の高
騰を招いていた。ここで、一般的なスタ−デルタ始動器
を使用した場合のトルク・電流・入力特性を図９，図１
０，図１１に示す。2. Description of the Related Art Generally, a simple starting method of an induction motor for driving a load includes a straight-in start and a star-delta start. In this direct-injection start, although a sufficient torque can be exhibited, a large current flows in a large-capacity electric motor at the time of start, so that the cost of electric equipment is enormous. Further, according to the star-delta starter, although the current at the time of starting can be suppressed low, the starting torque is also reduced and the starting torque is reduced, so that a large-sized induction motor is used, which causes a rise in the motor. Was. Here, FIG. 9 and FIG. 1 show the torque / current / input characteristics when a general star-delta starter is used.
0, shown in FIG.
【０００３】これまでに誘導電動機の始動方法として、
特開昭５１−１０４５１３号公報あるいは特開昭５２−
５４１１２号公報等があり、スタ−あるいはデルタに固
定子巻線を切り換えて行う多くの始動方法は公知であ
る。これらは、固定子巻線を複数の回路（巻線）で構成
して、始動時にはこれら巻線をそれぞれスタ−あるいは
デルタに切換えながら始動電流を抑制しようとするもの
であった。[0003] As a method of starting an induction motor,
JP-A-51-104513 or JP-A-52-104513
No. 54112, etc., and many starting methods for switching the stator winding to star or delta are known. In these methods, a stator winding is constituted by a plurality of circuits (windings), and at the time of starting, these windings are switched to a star or a delta to suppress a starting current.
【０００４】以上のものは、始動電流が抑制できる反
面、スタ−デルタ始動であることには違いなく、始動電
流を抑制すると始動時のトルクの低下は避けられない。
このためスタ−デルタ始動としたものは二乗低減負荷の
ような、スタ−デルタ始動のスタ−接続における起動ト
ルクよりも小さな負荷だけの対応となり、誘導電動機で
ありながら用途が限定され汎用の誘導電動機とはなり得
ないものである。更に、これらの始動方法による誘導電
動機では、始動トルクよりも大きい連続運転可能な中間
トルク特性を有していない。[0004] Although the starting current can suppress the starting current, it must be a star-delta starting, and if the starting current is suppressed, a decrease in the torque at the time of starting cannot be avoided.
For this reason, the star-delta starter can handle only a load smaller than the starting torque in the star connection of the star-delta starter, such as a squared reduction load. Cannot be. Furthermore, the induction motors according to these starting methods do not have an intermediate torque characteristic that enables continuous operation that is larger than the starting torque.
【０００５】また直入れによる慣性の大きい負荷の始動
後は、始動時のような大きなトルクは不要で１／２トル
ク程度での運転が可能であれば省電力運転につながる
が、これまでの誘導電動機での直入れ始動では中間トル
クの設定はなく、ここでスタ−デルタ始動を逆に使用し
たとしてもスタ−接続でのトルクでは定格トルク以下で
この接続での運転は不可能である。After starting a load having a large inertia due to direct insertion, a large torque is not required at the time of starting, and if operation at about 1/2 torque is possible, it leads to power saving operation. There is no intermediate torque setting in direct-induction starting with an electric motor, and even if star-delta starting is used in reverse, it is impossible to operate in this connection at a star connection torque below the rated torque.
【０００６】ところで、単一の固定子コアに単独の固定
子巻線を複数個設け、そのうち一つの固定子巻線だけに
給電すると、起磁力波形が悪くなる原因となり、トルク
特性が乱れ起動不可能になったり、運転効率が低下する
などの欠点が目立ち実用に耐えないものであった。If a single stator core is provided with a plurality of single stator windings and power is supplied to only one of the stator windings, the magnetomotive force waveform is deteriorated, the torque characteristics are disturbed, and starting is not possible. Disadvantages such as the possibility of operation and a decrease in operating efficiency were conspicuous, and were not practical.
【０００７】[0007]
【発明が解決しようとする課題】直入れ始動を行う誘導
電動機は、極めて小さな負荷かあるいは慣性力の大きい
負荷に使用されることが多く、誘導電動機の始動トルク
を重視した使用方法である。しかし、このような慣性の
大きい負荷が大きなトルクを必要とするのは定格回転数
に至るまでで、いったん定格回転数に達すると慣性負荷
が大型だけに簡単に回転が変動することもなく、始動後
は小さなトルクで十分である。しかし、小さなトルクで
十分であるにもかかわらず誘導電動機が直入れ始動であ
るために始動後も出力を低下させることができず無駄な
電力を消費しているのが現実である。従って、始動時に
は始動電流を抑え大きなトルクを発生することができ
て、定格運転時には省電力運転が可能な誘導電動機によ
る駆動装置とその始動運転方法の開発が望まれている。
このためコンドルファ始動や、最近ではインバ−タ始動
もあるが、いずれにしても装置が大変高価である。An induction motor that performs a straight-in start is often used for an extremely small load or a load having a large inertial force, and is a usage method that emphasizes the starting torque of the induction motor. However, such a load with large inertia requires a large torque up to the rated speed, and once the rated speed is reached, the inertia load is large and the rotation does not fluctuate easily. After that, a small torque is enough. However, despite the fact that a small torque is sufficient, the induction motor is a straight-on start, so that the output cannot be reduced even after the start and wasteful power is consumed. Therefore, there is a demand for the development of a drive device using an induction motor that can suppress a start-up current at the time of starting and generate a large torque, and that can perform power-saving operation at rated operation, and a start-up operation method thereof.
For this reason, there are condorfa starting and recently inverter starting, but in any case, the apparatus is very expensive.
【０００８】また、誘導電動機は非常用発電設備の負荷
として使用されることが多い。つまり非常用消火設備用
ポンプ等の駆動用電動機として使用されている。この非
常用発電の自家発電設備を構成する原動機とこの原動機
によって駆動する発電機とは、その原動機の大きさと発
電機容量とを、この発電設備の負荷となる電動機の起動
から定格運転に至る始動期間における、電動機定格に対
する負荷電流変化率及び入力変化率によって計算される
係数で選定されている。したがって、始動期間における
起動電流を小さくすることは勿論のこと、始動期間内に
おけるスタ−デルタ切換による切換時の負荷電流や入力
の変化率を小さくすることが検討されてきた。これらの
値を小さくすることは必要とする発電機や原動機の容量
を小さくすることになり設備費を低減させることができ
るからである。In addition, induction motors are often used as loads for emergency power generation equipment. That is, it is used as a drive motor for a pump for emergency fire extinguishing equipment. The prime mover constituting the private power generation facility for emergency power generation and the generator driven by the prime mover are designed to reduce the size of the prime mover and the capacity of the generator from the start-up of the motor, which is a load on the power generation facility, to the rated operation. It is selected by a coefficient calculated based on the load current change rate and the input change rate with respect to the motor rating during the period. Therefore, it has been studied not only to reduce the starting current during the starting period but also to reduce the rate of change of the load current and the input during the switching by the star-delta switching during the starting period. This is because reducing these values reduces the required capacity of the generator and the prime mover, thereby reducing equipment costs.
【０００９】また緊急時に作動する消化設備等のポンプ
はできるだけ定格運転までの立ち上がりを短くしたいも
のである。このため前記の負荷電流変化率や入力変化率
を気にかけながらも、できるだけ起動トルクを大きくし
て起動時間を短くした電動機の開発が望まれ、しかも構
造が簡単な誘導電動機による駆動装置の開発が望まれて
いる。この結果、クロ−ズドスタ−デルタ始動、リアク
トル始動、コンドルファ始動及び特殊コンドルファ始動
などによって実現されているがいずれも大変高価な装置
を必要としている。[0009] In addition, pumps for digestion equipment and the like that operate in an emergency need to have a short start up to rated operation as much as possible. For this reason, it is desired to develop a motor in which the starting torque is increased as much as possible and the starting time is shortened while paying attention to the load current change rate and the input change rate, and a drive device using an induction motor having a simple structure is desired. Is desired. As a result, although closed star delta starting, reactor starting, condorfa starting, special condorfa starting, etc., all require very expensive equipment.
【００１０】誘導電動機をコンプレッサ−等の運転・停
止あるいは高負荷・低負荷を頻繁に繰り返すものに使用
した場合、誘導電動機は停止と再起動を頻繁に繰り返す
ことになり、再起動時の始動電流によって温度上昇が激
しくこのような使用ができないものである。大型のもの
はこの起動時の始動電流を低く抑えるためにスタ−デル
タ始動を行っているが、スタ−始動では起動トルクが低
く再起動できないことが多く、１ランク上の誘導電動機
を設置している。また、コンプレッサ−の駆動には常時
電動機を回転させておくアンロ−ド型があり、不要なエ
ア−を適宜排気しているものがあるが、電動機を常時回
転させるためランニングコストは大きい。If the induction motor is used for a compressor or the like which repeatedly starts and stops or repeatedly switches between high load and low load, the induction motor repeatedly stops and restarts. The temperature rises so severely that such use is not possible. Large sized motors use star-delta starting in order to reduce the starting current at the time of starting. However, the starting torque is often too low to start with star starting, and a higher rank induction motor is installed. I have. Further, there is an unload type in which the motor is constantly rotated to drive the compressor, and there is a type in which unnecessary air is appropriately exhausted. However, since the motor is constantly rotated, the running cost is large.
【００１１】以上のことから、慣性の大きな負荷のため
に無駄な電力を消費したりあるいは汎用の電動機であり
ながら特別に始動時の電流を抑えることを目的とした始
動装置を設けたために特殊用途での電動機になっていた
のがこれまでの誘導電動機であった。したがって、汎用
の誘導電動機のように別の高価な始動装置を必要とせ
ず、大きな慣性負荷用の電動機としても、自家発電設備
用の負荷としても、また起動・停止を繰り返したり負荷
時と非負荷時とで使い分けるコンプレッサ−の電動機と
しても、誘導電動機としての能力を十分発揮させなが
ら、どのような用途にも電動機として効率良く使用する
ことができるようにした安価な誘導電動機による駆動装
置の提供を技術的課題とする。[0011] From the above, it can be seen that a starting device for consuming wasteful power due to a load having a large inertia or a special purpose electric motor for suppressing the electric current at the time of starting is provided. The induction motor used to be the conventional motor. Therefore, there is no need for a separate and expensive starting device like a general-purpose induction motor, and it can be used as a motor for large inertial loads, as a load for private power generation equipment, or repeatedly started and stopped, or when no load is applied. As a compressor motor that can be used at different times, it is necessary to provide a drive device using an inexpensive induction motor that can be efficiently used as a motor in any application while fully exhibiting the ability as an induction motor. Technical issues.
【００１２】単一の回転子と固定子からなる、定格トル
クよりも起動トルクが小さい特性の通常の汎用誘導電動
機の出力選定は、定格トルクが基準ではなく、負荷トル
クに対する誘導電動機の起動トルクとなり、特にスタ−
デルタ始動にした場合、どうしても起動トルクが小さく
なることから電動機出力をランクアップした出力機種を
選定することになり、これは起動時が高負荷のものは顕
著である。したがって汎用の誘導電動機でも無駄な出力
アップした誘導電動機の選定を行うことなく多様な負荷
に対応できる誘導電動機による駆動装置の構成とその始
動運転方法の提供を技術的課題とする。The output of a general-purpose induction motor composed of a single rotor and a stator and having a starting torque smaller than the rated torque is selected based on the starting torque of the induction motor with respect to the load torque, not the rated torque. , Especially the star
In the case of the delta start, since the starting torque is inevitably reduced, an output model in which the motor output is ranked higher must be selected. This is remarkable when the load is high at the start. Accordingly, it is a technical object of the present invention to provide a configuration of a drive device using an induction motor capable of coping with various loads without selecting a useless induction motor whose output has been increased even with a general-purpose induction motor, and to provide a starting operation method thereof.
【００１３】[0013]
【課題を解決するための手段】本発明によると、同一回
転軸に軸着した２個のかご形回転子と、該２個の回転子
それぞれに対峙して固定子巻線を巻装した２個の固定子
とからなる誘導電動機と、一方の固定子巻線と他方の固
定子巻線との両方あるいはどちらか一方を電源に接続す
ると共に、各固定子巻線の電源に対する結線を個別にス
ター結線あるいはデルタ結線に切り換える切換装置とか
ら構成したことを特徴とする誘導電動機による駆動装置
を構成したことにより前記課題を解決するための手段と
した。According to the present invention, two cage rotors are mounted on the same rotating shaft, and a stator winding is wound around each of the two rotors. And one or both of the stator windings and the other stator winding are connected to a power supply, and the connection of each stator winding to the power supply is individually made. A switching device for switching between a star connection and a delta connection is provided as a means for solving the above-described problem by constituting a drive device using an induction motor, which is characterized by being constituted.
【００１４】別の手段として、同一の負荷を駆動するよ
う接続した２台の誘導電動機と、一方の誘導電動機の固
定子巻線と他方の誘導電動機の固定子巻線との両方ある
いはどちらか一方を電源に接続すると共に、各固定子巻
線の電源に対する結線を個別にスター結線あるいはデル
タ結線に切り換える切換装置とから構成したことを特徴
とする誘導電動機による駆動装置を構成したことにより
前記課題を解決するための手段とした。As another means, two induction motors connected to drive the same load, and / or one of a stator winding of one induction motor and a stator winding of the other induction motor. And a switching device for individually switching the connection of each stator winding to the power supply to a star connection or a delta connection. It was a means to solve it.
【００１５】また、前記切換装置は、両方の固定子巻線
を電源に対してスタ−結線とデルタ結線とにそれぞれ切
換可能した。The switching device can switch both stator windings to a star connection and a delta connection with respect to a power supply.
【００１６】前記切換装置は、第１に２個の固定子巻線
それぞれをデルタ結線にして給電し定格回転数に至った
後、一方の固定子巻線をスタ−あるいはデルタ結線にし
てその固定子巻線のみに給電する始動運転方法とするこ
と、あるいは、第１に２個の固定子巻線それぞれをスタ
−結線にして給電し、第２にいずれか一方の固定子巻線
をデルタ結線にして、第３に２個の固定子巻線をそれぞ
れデルタ結線にして給電する始動運転方法とすることに
より、例えば慣性の大きい負荷や、結線切換時の電流・
入力変動を小さくしたい時への対応が安価に可能とな
る。In the switching device, first, each of the two stator windings is connected in a delta connection and supplied with power, and after reaching the rated speed, one of the stator windings is connected in a star or delta connection and fixed. A starting operation method in which power is supplied to only the stator windings, or first, two stator windings are each connected in a star connection to supply power, and secondly, one of the stator windings is connected in a delta connection. Thirdly, by providing a start operation method in which the two stator windings are each connected in a delta connection and supplied with power, for example, a load having a large inertia, and a current and
It is possible to inexpensively cope with a case where it is desired to reduce the input fluctuation.
【００１７】更に、切換装置は、２個の固定子巻線それ
ぞれをデルタ結線にして、２個の固定子巻線の両方と一
方とに給電を切換可能にする始動運転方法で、運転・停
止を繰り返す負荷や、高負荷と低負荷とに変化する負荷
への対応が可能となる。Further, the switching device is a start-up operation method in which each of the two stator windings is connected in a delta connection so that power supply can be switched to both or one of the two stator windings. , Or a load that changes between a high load and a low load.
【００１８】[0018]
【作用】まず、本発明は同一回転軸に軸着した２個のか
ご形回転子と、該２個の回転子それぞれに対峙して固定
子巻線を巻装した２個の固定子と、一方の固定子巻線と
他方の固定子巻線の両方あるいはどちらかに順次切り換
えて給電する切換装置とから誘導電動機による駆動装置
を構成したので、これまでの汎用誘導電動機としても使
用可能であると共に、直入れ始動後省電力運転にした
り、スタ−デルタ始動も可能である。それだけでなく、
固定子と回転子とをそれぞれ２組設けてあり、どちらか
一方の組だけに給電すれば中間トルクでの運転が連続的
に可能である。このことはこれまでの誘導電動機では簡
単に実現できないものであった。First, the present invention provides two cage rotors mounted on the same rotating shaft, and two stators each having a stator winding wound facing each of the two rotors. Since a driving device based on an induction motor is constituted by a switching device for sequentially switching to one or both of the stator windings and / or the other stator winding to supply power, the driving device can be used as a conventional general-purpose induction motor. At the same time, it is possible to perform a power saving operation after the direct-injection start, or to perform a star-delta start. not only that,
Two sets of the stator and the rotor are provided, and if only one of the sets is supplied with power, the operation with the intermediate torque can be continuously performed. This has not been easily achieved with conventional induction motors.
【００１９】また、同一の負荷を駆動するよう接続した
２台の誘導電動機と、一方の誘導電動機の固定子巻線と
他方の誘導電動機の固定子巻線との両方、あるいはどち
らかに順次切り換えて給電する切換装置とから誘導電動
機による駆動装置を構成したので、汎用誘導電動機をそ
のまま利用できるだけでなく、一方の誘導電動機での直
入れ起動が可能で、２台の合計出力と同等の誘導電動機
をスタ−デルタ起動した場合の起動トルクよりも、この
１台の直入れ出力の方が大きい起動トルクとなり、この
場合の起動電流も２台の誘導電動機を合計した定格電流
を超えることはない。Further, two induction motors connected to drive the same load, and one or both of the stator winding of the induction motor and the stator winding of the other induction motor are sequentially switched. Since a drive device using an induction motor is composed of a switching device that supplies power to the induction motor, not only can a general-purpose induction motor be used as it is, but also one of the induction motors can be started directly, and an induction motor equivalent to the total output of two units Is a larger starting torque than the starting torque when star-delta starting is performed, and the starting current in this case does not exceed the rated current of the two induction motors in total.
【００２０】切換装置は、両方の固定子巻線を電源に対
してスタ−結線とデルタ結線とにそれぞれ切換可能にし
てあり、これであらゆる負荷トルクに対応できる誘導電
動機による駆動装置となっている。しかもこの切換装置
はこれまでの容量の１／２程度の簡単な開閉器で構成で
き、この開閉器の個数も僅か２個から５個であり定格も
半分の容量でよく、安価に実現できるものである。この
他、切換装置の切換制御には回転数、時限、負荷トルク
等の値により順次切り換えることは従来からの公知技術
で実現できる。In the switching device, both stator windings can be switched between a star connection and a delta connection with respect to a power supply, thereby providing an induction motor driven device capable of coping with any load torque. . In addition, this switching device can be constituted by a simple switch having a capacity of about 1/2 of the conventional capacity, and the number of the switches is only 2 to 5 and the capacity can be reduced to half the capacity, and can be realized at low cost. It is. In addition, in the switching control of the switching device, it is possible to sequentially switch according to values such as the number of rotations, a time limit, and a load torque by a conventionally known technique.
【００２１】また切換装置によって、第１に２個の固定
子巻線を並列デルタ結線にして両方の固定子巻線に給電
し定格回転数に至った後、一方の固定子巻線をスタ−あ
るいはデルタ結線にして一方の固定子のみに給電する始
動運転方法のものは、慣性力の大きい負荷の始動と運転
に適している。慣性力の大きい負荷であるプレス、破砕
機などは始動には大きなトルクを必要とするが、いった
ん定格回転数に至ると大きなトルクは不要となる。従っ
てこの定格回転数以後、本発明の誘導電動機は切換装置
による切換で一方の固定子巻線をデルタ結線にして一方
のみ給電する連続運転に切り換えると、通常の電流から
半分以下に大きく下回る省電力運転が可能となる。つま
り電流もトルクも１／２となる。しかし並列スタ−結線
時のトルクより大きい起動トルクを有している。また、
減速器を使用した破砕機の始動には、始動時が比較的低
トルクであることから、一方の固定子巻線をデルタ結線
して一方のみ給電して始動することが可能であり、比較
的負荷の大きい運転時には両方の固定子巻線を並列デル
タ結線して給電することにより大きなトルクを引き出す
ことができる。Further, first, the two stator windings are connected in parallel delta connection by the switching device, and power is supplied to both the stator windings to reach the rated rotational speed. Alternatively, a start operation method in which power is supplied to only one of the stators in a delta connection is suitable for starting and operating a load having a large inertial force. Presses, crushers, and the like, which are loads with large inertial forces, require a large torque for starting, but once the rated speed is reached, a large torque is not required. Therefore, after the rated rotation speed, when the induction motor of the present invention is switched to continuous operation in which one of the stator windings is delta-connected by switching by the switching device and only one of them is supplied with power, the power saving which is substantially less than half of the normal current is reduced. Driving becomes possible. That is, both the current and the torque are halved. However, it has a starting torque larger than the torque at the time of parallel star connection. Also,
Since the starting time of the crusher using the speed reducer is relatively low at the time of starting, it is possible to start the crusher by supplying one of the stator windings in a delta connection and supplying power to only one of them. During operation with a large load, a large torque can be extracted by feeding both stator windings in parallel delta connection.
【００２２】さらに切換装置によって、第１に２個の固
定子巻線を並列スタ−結線にして両方の固定子巻線に給
電し、第２にいずれか一方の固定子巻線をデルタ結線に
して一方の固定子巻線のみに給電し、第３に２個の固定
子巻線を並列デルタ結線にして両方の固定子巻線に給電
する始動運転方法のものはポンプあるいはファンの運転
に最適である。Further, by the switching device, first, two stator windings are connected in parallel in a star connection, and power is supplied to both stator windings. Second, one of the stator windings is connected in a delta connection. Thirdly, the power supply to only one stator winding, and thirdly, the two stator windings are connected in parallel delta connection to supply power to both stator windings. It is.
【００２３】これらの負荷は二乗低減負荷であり始動は
緩やかな負荷の増加を見ながら定格運転に至るほど負荷
が大きくなる。従来よりこれらの始動にはスタ−結線か
らデルタ結線への切換えで行われてきた。本発明も同様
の切換パタ−ンとなるが、固定子と回転子とを２組設け
て構成したので、これまでの単体の誘導電動機のスタ−
デルタ切換と異なり、２組の固定子・回転子が単独に有
効に作用してこの始動期間の始動トルクの比率は１／
３，１／２，１と変化しソフトスタ−トが実現でき、負
荷電流や入力の変化率等を少なくして始動特性を大きく
向上させることができた。These loads are square-reduced loads, and the load increases as the load reaches the rated operation while a gradual increase in the load is observed at the start. Conventionally, such starting has been performed by switching from star connection to delta connection. The present invention has the same switching pattern. However, since two sets of the stator and the rotor are provided, the starter of the conventional single induction motor is used.
Unlike the delta switching, the two sets of stators and rotors work effectively independently and the ratio of the starting torque during this starting period is 1 /
3, 1/2, 1 and a soft start could be realized, and the starting characteristics could be greatly improved by reducing the load current and the rate of change of the input.
【００２４】次に切り換え装置によって、第１に２個の
固定子巻線を並列スタ−結線にして２個の固定子巻線に
給電し、第２にいずれか一方の固定子巻線をデルタ結線
にして、第３に２個の固定子巻線を並列デルタ結線にす
る始動運転方法のものは、自家用発電設備の負荷となる
防災用ポンプあるいは防災用ファンなどの二乗低減負荷
の駆動に最適である。Next, by the switching device, first, the two stator windings are connected in parallel in a star connection, and power is supplied to the two stator windings. Thirdly, the starting operation method in which two stator windings are connected in parallel in a delta connection is ideal for driving a square-reducing load such as a disaster prevention pump or a disaster prevention fan that is a load for private power generation equipment. It is.
【００２５】つまり、並列スタ−結線で起動すると並列
デルタ時のトルクに比較して電流・トルク共に比率１／
３である。並列スタ−結線で運転し負荷トルクとの交点
において、一方の固定子巻線をデルタ結線にして、デル
タ結線とスタ−結線との並列に切り換える。この時の切
換は単独のデルタ結線の電流が並列デルタ結線の１／２
で、単独のスタ−結線が並列デルタ結線の１／６である
から、電流は比率１／３から比率４／６に変化すること
になる。さらに、並列のスタ−デルタ結線で運転し負荷
トルクとの交点において次の並列デルタ結線に切り換え
る。この時の電流は比率４／６から比率１に変化する。That is, when the motor is started in the parallel star connection, both the current and the torque have a ratio of 1 /
3. The operation is performed in a parallel star connection, and at the intersection with the load torque, one of the stator windings is changed to a delta connection, and the delta connection and the star connection are switched in parallel. The switching at this time is such that the current of a single delta connection is １ ／ of that of a parallel delta connection.
Since the single star connection is 1/6 of the parallel delta connection, the current changes from the ratio 1/3 to the ratio 4/6. Further, the operation is performed in the parallel star-delta connection, and the operation is switched to the next parallel delta connection at the intersection with the load torque. The current at this time changes from ratio 4/6 to ratio 1.
【００２６】最初の切換時での電流変化は１／３から４
／６への変化であり、これは従来のスタ−デルタ切換始
動の１／３から１への大きな変化とは比較できない程小
さいものである。つぎの切換時での電流変化は４／６か
ら１であるが、この時すでに定格回転数に近くでの切換
となるため負荷電流もきわめて小さな値となっており、
ここでの４／６から１への変化が及ぼす影響は従来と比
較してきわめて小さいものとなっている。同様に入力の
変化も従来のスタ−デルタ切換に比較してきわめて小さ
いものとなっている。これらのことは前述したように、
２個の固定子・回転子で誘導電動機を構成していること
から、それぞれの組の電動機が有効に作用して一体とな
ったトルクを出しているからである。しかもそれぞれを
同じ容量の電動機で構成すればそれぞれのトルクは従来
の１／２であり、組み込むべき電気回路の容量もそれに
比例して安価となり、性能価格両面に亘って多大な効果
を有するものである。The current change at the time of the first switching is from 1/3 to 4
/ 6, which is so small that it cannot be compared with the large change from 1/3 to 1 in the conventional star-delta switching start. The current change at the time of the next switching is from 4/6 to 1, but at this time, since the switching has already been performed near the rated speed, the load current is also extremely small.
The effect of the change from 4/6 to 1 here is extremely small as compared with the related art. Similarly, the change in input is extremely small as compared with the conventional star-delta switching. These things, as mentioned above,
This is because the induction motor is composed of two stators and rotors, so that each set of motors works effectively to produce an integrated torque. In addition, if each motor is composed of the same capacity motor, the torque of each motor is half that of the conventional motor, and the capacity of the electric circuit to be incorporated is inexpensively proportionally reduced, which has a great effect on both performance and price. is there.
【００２７】また切換装置によって２個の固定子巻線そ
れぞれをデルタ結線にして、２個の固定子巻線の両方と
一方とに給電を切換可能にした始動運転方法のものは、
負荷が高低を繰り返すコンプレッサ−に最適である。コ
ンプレッサ−は運転・停止を繰り返すか、連続運転で高
負荷・低負荷を繰り返すものである。The starting operation method in which the two stator windings are delta-connected by a switching device so that power supply can be switched to both and one of the two stator windings,
It is most suitable for a compressor whose load repeats high and low. The compressor repeats running and stopping, or repeats high load and low load in continuous operation.
【００２８】小型のものはあまり問題とならないが、大
型のコンプレッサ−になると、運転・停止を繰り返し、
スタ−デルタ始動では始動トルクが足りず電動機が大型
になり、直入れ始動だけでは繰り返しに耐えられない。
従って、大トルク（２個の固定子巻線）とその半分（一
方の固定子巻線）のトルク特性を持つ誘導電動機で、起
動の瞬間だけ大トルクで始動して、直ちに半分のトルク
特性に切り換えることにより、大量の始動電流を速やか
に半分程度まで減少させることができるので、従来の直
入れだけのものより電動機の温度上昇は少なくなってい
る。Although a small compressor is not a problem, a large compressor repeatedly starts and stops operation.
In the star delta start, the starting torque is insufficient and the motor becomes large, so that it cannot withstand repetition only by the direct start.
Therefore, an induction motor having a large torque (two stator windings) and half (one stator winding) of torque characteristics, starts with a large torque at the moment of starting, and immediately reduces the torque characteristics to half. By switching, a large amount of starting current can be quickly reduced to about half, so that the temperature rise of the electric motor is smaller than that of the conventional direct insertion type.
【００２９】次に連続運転で高負荷・低負荷を繰り返す
ものは、従来の電動機では高負荷の時も低負荷の時も同
じトルクで運転しているため低負荷にも関わらず消費電
力が大きい。これを従来のものは、スタ−デルタ始動を
用いて低負荷時にスタ−接続して運転するものもある
が、スタ−デルタの切換は、スタ−時とデルタ時とのト
ルク差が大きく、また一旦電源から固定子巻線がすべて
切り離されるため接点の磨耗などメンテナンスが心配さ
れていた。従って、大トルクとその半分のトルク特性を
持つ誘導電動機で、高負荷時には大トルク（２個の固定
子巻線に給電）にして運転して、低負荷時には半分（一
方の固定子巻線に給電）のトルクで運転することによ
り、低負荷時には少ない消費電力で運転でき、しかも大
トルクと半分のトルクとの切換は、電源から一方の固定
子巻線が切り離されることがなく、しかも切り離される
他方の固定子に流れる電流も大トルク時のほぼ半分であ
ることから、接点の磨耗等のメンテナンスにおいても信
頼性を向上させることができた。[0029] Next, in the case where the high load and the low load are repeated in the continuous operation, the power consumption is large despite the low load because the conventional motor operates at the same torque both at the time of the high load and at the time of the low load. . Conventionally, there is a conventional type in which the star-delta starting is used to perform a star connection at a low load, but the star-delta switching has a large torque difference between the staring time and the delta time, and Since all the stator windings were once disconnected from the power supply, maintenance such as wear of the contacts was a concern. Therefore, an induction motor having a large torque and half of the torque characteristic is operated with a large torque (supplying power to two stator windings) at a high load, and a half (at one stator winding) at a low load. By operating with the torque of (power supply), operation can be performed with low power consumption at low load, and switching between large torque and half torque can be performed without disconnecting one stator winding from the power supply. Since the current flowing through the other stator is almost half that at the time of the large torque, the reliability can be improved even in maintenance such as wear of the contact.
【００３０】[0030]
【実施例】本発明による好適な第１の実施例を図１によ
り説明する。まず、本発明による誘導電動機の構成を説
明すると、符号１で示す誘導電動機は、回転軸２に任意
の間隔をおいて２個の回転子コア３，４が軸着してあ
り、各回転子コア３，４には回転子導体５，６が設けて
あり、これら回転子導体５，６は回転子コア３，４それ
ぞれの両側において短絡環７，８で短絡されかご形に形
成されており、２個の回転子を有する一体的回転子９が
構成されている。また、前記回転子コア３，４のそれぞ
れに対峙して任意の間隔を設けて周設した固定子コア１
０，１１とそれぞれに巻装された固定子巻線１２，１３
とから固定子１４，１５が構成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first preferred embodiment according to the present invention will be described with reference to FIG. First, the configuration of the induction motor according to the present invention will be described. In the induction motor denoted by reference numeral 1, two rotor cores 3 and 4 are axially mounted on a rotating shaft 2 at an arbitrary interval. Rotor conductors 5 and 6 are provided on the cores 3 and 4, and the rotor conductors 5 and 6 are short-circuited by short-circuit rings 7 and 8 on both sides of the rotor cores 3 and 4 to form a cage. An integrated rotor 9 having two rotors is configured. Further, the stator core 1 is provided around the rotor cores 3 and 4 at arbitrary intervals.
0, 11 and the stator windings 12, 13 wound respectively.
Thus, the stators 14 and 15 are configured.
【００３１】前記固定子１４，１５を内設した機枠１６
の両側には、玉軸受け１７が嵌合された軸受け盤１９と
玉軸受け１８が嵌合された軸受け盤２０とが嵌装されて
おり、前記玉軸受け１７，１８によって前記回転子９の
軸２は軸支されて前記固定子１４，１５と同心的に回転
自在となっている。また、固定子巻線１２，１３は切換
装置２５に接続されて誘導電動機による駆動装置として
いる。本発明では、コンパクトに実現するために、一つ
の機枠に２個の回転子と２個の固定子を併設しており、
設置現場でもこれまでの誘導電動機と同じ要領で設置が
可能である。The machine frame 16 in which the stators 14 and 15 are installed
A bearing board 19 in which a ball bearing 17 is fitted and a bearing board 20 in which a ball bearing 18 is fitted are fitted on both sides of the shaft 9. Is rotatably supported concentrically with the stators 14 and 15. Further, the stator windings 12 and 13 are connected to a switching device 25 to form a driving device using an induction motor. In the present invention, in order to realize compactness, two rotors and two stators are provided in one machine frame,
At the installation site, installation can be performed in the same manner as conventional induction motors.
【００３２】更に、本発明による好適な第２の実施例を
図２により説明する。図２に示すものは、汎用誘導電動
機を２個使用して負荷を駆動するように構成した誘導電
動機による駆動装置であって、図２の（Ａ）は、誘導電
動機２３，２４を負荷２２の両側からカップリング２７
を介して接続した構成を示してあり、誘導電動機２３，
２４は切換装置２５を介して電源２６と電気的に接続し
てある。Further, a second preferred embodiment according to the present invention will be described with reference to FIG. FIG. 2 shows a drive device using an induction motor configured to drive a load by using two general-purpose induction motors. FIG. 2A shows that the induction motors 23 and 24 are connected to the load 22. Coupling 27 from both sides
Are connected via an induction motor 23,
Reference numeral 24 is electrically connected to a power supply 26 via a switching device 25.
【００３３】また図２の（Ｂ）は、誘導電動機２３がカ
ップリング２７を介して負荷２２を駆動するようにして
あり、誘導電動機２４はプ−リ２８及びベルト２９を介
して負荷２２を駆動するようにしてある。ここで誘導電
動機２３，２４と電源２６との接続は前述（Ａ）のとお
りである。In FIG. 2B, the induction motor 23 drives the load 22 via a coupling 27, and the induction motor 24 drives the load 22 via a pulley 28 and a belt 29. I have to do it. Here, the connection between the induction motors 23 and 24 and the power supply 26 is as described above (A).
【００３４】更に図２の（Ｃ）では誘導電動機２３と誘
導電動機２４ともにプ−リ２８とベルト２９とによって
負荷２２を駆動するように接続してある。ここでの誘導
電動機２３，２４と電源２６との接続も前述（Ａ）のと
おりである。Further, in FIG. 2C, both the induction motor 23 and the induction motor 24 are connected to drive the load 22 by a pulley 28 and a belt 29. The connection between the induction motors 23 and 24 and the power supply 26 here is also as described in (A) above.
【００３５】この場合は、負荷に必要な容量の半分の容
量の汎用誘導電動機を２台準備すれば良く、誘導電動機
の価格も、半分の容量の誘導電動機２台の合計価格が、
必要な容量の誘導電動機価格を超えることはない。In this case, it is sufficient to prepare two general-purpose induction motors having a capacity half the capacity required for the load, and the price of the induction motors is also reduced by the total price of the two induction motors having a half capacity.
The required capacity of the induction motor will not be exceeded.
【００３６】次に誘導電動機１と一体的に構成されてい
る切換装置２５について図３により説明する。またこの
切換装置２５の切換制御については、誘導電動機に接続
する負荷によって、回転数、負荷電流、温度、時限等の
いずれかあるいは複数を検出し、その値によって切り換
えるよう制御することも有効な手段となる。また切換装
置には単純なシ−ケンスを組み込んで単に時限あるいは
回転数等によって切り換えるようにすれば、これまでの
誘導電動機と全く同じ取扱いができる。また、切換装置
２５と他の制御盤（図示せず。）とを接続して制御盤に
よって誘導電動機を制御することも可能である。Next, the switching device 25 integrated with the induction motor 1 will be described with reference to FIG. As for the switching control of the switching device 25, it is also effective to detect any one or a plurality of rotation speeds, load currents, temperatures, time periods, etc. according to the load connected to the induction motor, and to control the switching based on the values. Becomes If a simple sequence is incorporated in the switching device and the switching is performed simply by a time limit or the number of revolutions, the same handling as the conventional induction motor can be performed. It is also possible to connect the switching device 25 to another control panel (not shown) to control the induction motor by the control panel.
【００３７】ここでは、切換装置２５における固定子巻
線１２，１３と開閉装置Ｓとの接続図を図３及び図７か
ら図８に示す。また切換によるトルクや電流の変化を図
４から図６に示しいる。更に、図２で示した２台の誘導
電動機２３，２４と切換装置２５との接続は第１の実施
例と同様であるため、実施例２については以下の説明を
省略する。FIG. 3 and FIGS. 7 to 8 show connection diagrams between the stator windings 12 and 13 and the switching device S in the switching device 25. FIG. FIGS. 4 to 6 show changes in torque and current due to switching. Further, the connection between the two induction motors 23 and 24 and the switching device 25 shown in FIG. 2 is the same as that of the first embodiment, and the following description of the second embodiment will be omitted.
【００３８】さて三相固定子巻線１２の一方は電源Ｒ，
Ｓ，Ｔにメイン開閉装置Ｓ１を介して接続され、三相固
定子巻線１２の他方はスタ−結線のための開閉装置Ｓ２
に接続されている。三相固定子巻線１３は前記固定子巻
線１２と並列に開閉装置Ｓ３を介して接続してある。さ
らに固定子巻線１２，１３は共に開閉装置Ｓ４でデルタ
結線されている。また、それぞれの開閉装置Ｓを別のシ
−ケンス回路（図示せず）によって制御すれば、時間に
よってあるいは回転数によって始動時における開閉装置
Ｓの開閉を自動化できる。Now, one of the three-phase stator windings 12 has a power source R,
S, T are connected via a main switch S1 and the other of the three-phase stator windings 12 is a switch S2 for star connection.
It is connected to the. The three-phase stator winding 13 is connected in parallel with the stator winding 12 via a switching device S3. Further, both the stator windings 12 and 13 are delta-connected by a switchgear S4. Further, if each switchgear S is controlled by another sequence circuit (not shown), the opening and closing of the switchgear S at the time of starting can be automated by time or by the number of rotations.
【００３９】以上のように構成すると、並列デルタ結線
と並列スタ−結線と単デルタ結線及び単スタ−結線とが
可能で、非常にトルクの小さい単スタ−結線を除く３種
のトルク・電流・入力の各特性を図４，図５，図６に示
す。従って、あらゆる負荷に対してこれまでの誘導電動
機と同様に使用可能であり、当然直入れ始動もスタ−デ
ルタ始動も可能である。これで慣性の大きい負荷でも、
二乗低減負荷でも切換装置の切り換え順序を変更するだ
けであらゆる負荷トルクに対応できる誘導電動機による
駆動装置となっている。それだけでなく、固定子と回転
子とをそれぞれ２組設けてあることから、デルタ結線で
どちらか一方の三相固定子巻線だけに給電すれば、図４
の単デルタ結線で示すように、従来のスタ−デルタ始動
の起動トルクよりも、また定格トルクよりも大きい中間
トルク（図４の単デルタ結線）での始動が可能で、起動
電流（図５の単デルタ結線）も並列スタ−始動時の１．
５倍程度と非常に小さくしかも連続運転が可能である。
このことはこれまでの誘導電動機では簡単に得られない
特性であり実現できないものであった。また、この構成
での並列スタ−あるいは並列デルタの結線は、従来の１
固定子内で２回路の並列結線と異なり、実質的には定格
１／２出力の誘導電動機の単独のスタ−結線デルタ結線
であることから、並列にしたことによる磁気回路上の互
いの干渉はなく、あるいは一方の固定子巻線のみに給電
したことによる磁気特性の変化やトルク特性への影響は
ない。しかもこの切換装置Ｓ２，Ｓ３，Ｓ４は、メイン
開閉装置Ｓ１を除きこれまでの容量の１／２程度の開閉
装置で構成でき、この開閉装置の個数も他の実施例も含
め僅か２個から５個であり、その開閉装置も安価に実現
できるものである。With the above configuration, parallel delta connection, parallel star connection, single delta connection and single star connection are possible, and three types of torque, current, Each characteristic of the input is shown in FIGS. Therefore, it can be used for any load in the same manner as the conventional induction motor, and it is naturally possible to perform both the straight-in start and the star-delta start. With this, even with a large inertia load,
A drive device using an induction motor that can cope with any load torque simply by changing the switching order of the switching device even with a squared reduction load. In addition, since two sets of the stator and the rotor are provided, if power is supplied to only one of the three-phase stator windings by delta connection, FIG.
As shown by the single delta connection, starting with an intermediate torque (single delta connection in FIG. 4) larger than the starting torque of the conventional star delta starting and rated torque is possible, and the starting current (in FIG. (Single delta connection) 1.
It is extremely small, about five times, and can be operated continuously.
This is a characteristic that cannot be easily obtained with conventional induction motors and cannot be realized. The connection of the parallel star or the parallel delta in this configuration is the same as that of the conventional one.
Unlike the parallel connection of two circuits in the stator, it is substantially a single star connection delta connection of an induction motor with a rated output of 1/2, so that the mutual interference on the magnetic circuit due to the parallel connection is small. However, there is no change in magnetic characteristics or influence on torque characteristics due to power supply to only one of the stator windings. In addition, the switching devices S2, S3 and S4 can be constituted by switching devices having a capacity of about 1/2 of the conventional capacity except for the main switching device S1, and the number of the switching devices is as small as 2 to 5 including other embodiments. And the switching device can be realized at low cost.
【００４０】では図３の結線による誘導電動機によっ
て、慣性の大きい負荷の始動と運転を行う場合について
説明する。この場合すべての開閉装置が開かれた状態
で、切換装置によって、第１に開閉装置Ｓ３，Ｓ４を閉
じて２個の三相固定子巻線１２，１３を並列デルタ結線
にして、開閉装置Ｓ１を閉じて両方の三相固定子巻線１
２，１３に給電し定格回転数に至った後、開閉装置Ｓ３
を開いて一方の三相固定子巻線１２だけをデルタ結線
（単デルタ）にして一方だけに給電するようにしてあ
る。それぞれの結線におけるトルク・電流・入力特性は
図４，図５，図６に示してある。Now, a description will be given of a case where a load having a large inertia is started and operated by the induction motor having the connection shown in FIG. In this case, with all the switching devices opened, the switching devices first close the switching devices S3 and S4 to make the two three-phase stator windings 12 and 13 parallel delta-connected, and the switching device S1 Close both three-phase stator windings 1
After the power is supplied to the motors 2 and 13 to reach the rated speed, the switchgear S3
To open only one of the three-phase stator windings 12 in a delta connection (single delta) to supply power to only one. The torque / current / input characteristics in each connection are shown in FIGS.
【００４１】慣性力の大きい負荷であるプレス、破砕機
などは始動には大きなトルクを必要とするが、いったん
定格回転数に至ると大きなトルクは不要となる。従って
開閉装置Ｓ３，Ｓ４を閉じて三相固定子巻線１２，１３
を図３の並列デルタ結線で起動して定格回転数以後、本
発明の誘導電動機は切換装置２５による切換で開閉装置
Ｓ３を開いて一方の三相固定子巻線１２だけをデルタ結
線にして一方のみ給電する連続運転（図４の単デルタ結
線）に切り換えて、運転中は通常の定格電流を大きく下
回る省電力運転を行うことができる。つまり電流もトル
クも１／２となる。しかし、このときの起動トルクは、
並列デルタ結線の定格トルクよりも大きいものである。Presses, crushers, and the like, which are loads having a large inertial force, require a large torque for starting, but once the rated rotational speed is reached, a large torque is not required. Therefore, the three-phase stator windings 12, 13 are closed by closing the switching devices S3, S4.
3 is started in the parallel delta connection shown in FIG. 3, and after the rated rotation speed, the induction motor of the present invention opens the switch S3 by switching by the switching device 25 to make only one of the three-phase stator windings 12 delta connection. By switching to the continuous operation (single delta connection in FIG. 4) in which only power is supplied, a power-saving operation that is much lower than the normal rated current can be performed during the operation. That is, both the current and the torque are halved. However, the starting torque at this time is
It is larger than the rated torque of the parallel delta connection.
【００４２】また、減速器を使用した破砕機の始動に
は、逆に始動時が比較的低トルクであることから、開閉
装置Ｓ４を閉じて一方の三相固定子巻線１２をデルタ結
線して一方のみ（図４の単デルタ結線）に給電して始動
することが可能であり、比較的負荷の大きい運転時には
両方の三相固定子巻線１２，１３を並列デルタ結線（図
４の並列デルタ結線）して給電することにより大きなト
ルクを引き出すことができる。On the other hand, when starting the crusher using the speed reducer, on the contrary, since the torque at the start is relatively low, the switch S4 is closed and one of the three-phase stator windings 12 is delta-connected. It is possible to start by supplying power to only one side (single delta connection in FIG. 4), and during operation with a relatively large load, both three-phase stator windings 12 and 13 are connected in parallel delta connection (parallel connection in FIG. 4). A large torque can be extracted by feeding the power in a delta connection.
【００４３】次に図３の結線で誘導電動機による駆動装
置によって二乗低減負荷であるポンプ・ファンの始動を
行う場合について説明する。この場合すべての開閉装置
が開かれた状態で、切換装置によって、第１に切換装置
の開閉装置Ｓ３，Ｓ２を閉じて２個の固定子巻線１２，
１３を並列スタ−結線にして開閉装置Ｓ１を閉じて両方
の固定子巻線１２，１３に給電し、第２に開閉装置Ｓ
２，Ｓ３を開き開閉装置Ｓ４を閉じて一方の固定子巻線
１２をデルタ結線にして一方の固定子巻線１２のみに給
電し、第３に開閉装置Ｓ３を閉じて２個の固定子巻線１
２，１３を並列デルタ結線にして両方の固定子巻線１
２，１３に給電するものである。Next, a description will be given of a case where the pump / fan, which is a square-reducing load, is started by the driving device using the induction motor in the connection shown in FIG. In this case, with all the switching devices opened, the switching devices first close the switching devices S3 and S2 of the switching device to open the two stator windings 12,
13 is connected in parallel in a star connection, the switch S1 is closed and power is supplied to both stator windings 12 and 13;
2, open S3, close switch S4, connect one stator winding 12 to delta connection and supply power to only one stator winding 12, and third, close switch S3 to close two stator windings. Line 1
2 and 13 are connected in parallel delta connection, and both stator windings 1
2 and 13.
【００４４】ポンプあるいはファンは二乗低減負荷であ
り始動は緩やかな負荷の増加を見ながら定格運転に至る
ほど負荷が大きくなる。従来よりこれらの始動にはスタ
−結線からデルタ結線への切換で行われてきた。本発明
も同様の切換パタ−ンとなるが、固定子と回転子とを２
組設けて構成したので、これまでの単体の誘導電動機の
スタ−デルタ切換と大きく異なっている。つまり、２組
の三相固定子巻線１２，１３が単独に有効に作用して、
この始動期間における最終の並列デルタ結線に対する電
流及びトルクの比率は、並列スタ−（図４の並列スタ−
結線）時が１／３，単独デルタ（図４の単デルタ結線）
時が１／２，並列デルタ（図４の並列デルタ結線）時が
１、となる変化が確実に実現できてソフトスタ−トが可
能であり、従来のスタ−デルタ始動から始動特性を大き
く向上させることができた。The load of the pump or the fan is reduced to the square, and the load increases as the load reaches the rated operation with a gradual increase in the starting load. Conventionally, such starting has been performed by switching from star connection to delta connection. In the present invention, the switching pattern is the same, but the stator and the rotor are separated by two.
Since it is provided as a set, it is significantly different from the conventional star-delta switching of a single induction motor. In other words, the two sets of three-phase stator windings 12 and 13 work effectively independently,
The ratio of the current and the torque to the final parallel delta connection during the starting period is determined by the parallel star (the parallel star in FIG. 4).
Connection time) 1/3, single delta (single delta connection in Fig. 4)
A time change of 1/2 and a parallel delta (parallel delta connection in FIG. 4) can be reliably realized and a soft start is possible, greatly improving the starting characteristic from the conventional star delta start. I was able to.
【００４５】次に切換装置２５における固定子巻線１
２，１３と開閉装置Ｓとの結線を示す結線図の第２例を
図７に示した。つまり三相固定子巻線１２の一方は電源
Ｒ，Ｓ，Ｔにメイン開閉装置Ｓ１を介して接続され、三
相固定子巻線１２の他方はスタ−結線のための開閉装置
Ｓ２に接続されている。また、開閉装置Ｓ４によって三
相固定子巻線１２はデルタ結線される。三相固定子巻線
１３の一方は電源Ｒ，Ｓ，Ｔにメイン開閉装置Ｓ１を介
して接続され、三相固定子巻線１３の他方はスタ−結線
のための開閉装置Ｓ５に接続されている。また、開閉装
置Ｓ６によって三相固定子巻線１３はデルタ結線され
る。したがって、三相固定子巻線１２は開閉装置Ｓ２に
よってスタ−結線となり開閉装置Ｓ４によってデルタ結
線となる。さらに三相固定子巻線１３は開閉装置Ｓ５に
よってスタ−結線となり開閉装置Ｓ６によってデルタ結
線となる。Next, the stator winding 1 in the switching device 25
FIG. 7 shows a second example of the connection diagram showing the connection between the switchgears 2 and 13 and the switchgear S. That is, one of the three-phase stator windings 12 is connected to the power sources R, S, and T via the main switchgear S1, and the other of the three-phase stator windings 12 is connected to a switchgear S2 for star connection. ing. Further, the three-phase stator winding 12 is delta-connected by the switching device S4. One of the three-phase stator windings 13 is connected to power supplies R, S, and T via a main switchgear S1, and the other of the three-phase stator windings 13 is connected to a switchgear S5 for star connection. I have. The three-phase stator winding 13 is delta-connected by the switch S6. Therefore, the three-phase stator winding 12 is star-connected by the switch S2 and delta-connected by the switch S4. Further, the three-phase stator winding 13 is star-connected by the switch S5 and is delta-connected by the switch S6.
【００４６】図７の切換装置による誘導電動機によって
自家用発電設備の負荷となる防災用ポンプあるいは防災
用ファンなどの二乗低減負荷を始動する場合について説
明する。この場合、切換装置によって次のように始動す
る。すべての開閉装置を開いた状態で、第１に開閉装置
Ｓ２，Ｓ５を閉じて２個の固定子巻線１２，１３を並列
スタ−結線にして開閉装置Ｓ１を閉じて２個の三相固定
子巻線１２，１３に給電し、第２に一方の固定子巻線１
２の開閉装置Ｓ２を開き開閉装置Ｓ４を閉じてデルタ結
線にして、第３に三相固定子巻線１３の開閉装置Ｓ５を
開いて開閉装置Ｓ６を閉じて２個の三相固定子巻線１
２，１３を並列デルタ結線にする。A case in which a square-reducing load such as a disaster-prevention pump or a disaster-prevention fan serving as a load on a private power generation facility is started by an induction motor by the switching device in FIG. 7 will be described. In this case, the switching device starts as follows. With all the switchgears open, firstly, the switchgears S2 and S5 are closed, the two stator windings 12 and 13 are connected in a parallel star connection, and the switchgear S1 is closed to fix the two three-phases. Power to the stator windings 12 and 13, and secondly, to one of the stator windings 1.
Second, the switchgear S2 is opened, the switchgear S4 is closed and the delta connection is established, and thirdly, the switchgear S5 of the three-phase stator winding 13 is opened, the switchgear S6 is closed and the two three-phase stator windings are closed. 1
2, 13 are connected in parallel delta connection.
【００４７】以上から得られる結線の切換によるトルク
の切換とそれに伴う電流と入力の特性はつぎのようにな
る。The switching of the torque by the switching of the connection obtained from the above and the characteristics of the current and the input associated therewith are as follows.
【００４８】つまり、並列スタ−結線で起動すると並列
デルタに比較して電流・トルク共に比率１／３である。
並列スタ−結線で運転し負荷トルクとの交点Ａ（図４）
において、一方の三相固定子巻線１２をデルタ結線にし
て他方の三相固定子巻線１３のスタ−結線と並列に切り
換える。この時の切換は単独のデルタ結線の三相固定子
巻線１２の電流が並列デルタ結線の１／２で、単独のス
タ−結線の三相固定子巻線１３が並列デルタ結線の１／
６であるから、電流は比率１／３から比率４／６に変化
することになる。さらに並列のスタ−・デルタ結線で運
転し負荷トルクとの交点Ｂにおいて次の並列デルタ結線
に切り換える。この時電流は比率４／６から比率１に変
化する。That is, when the motor is started by the parallel star connection, the ratio of the current and the torque is 1/3 as compared with the parallel delta.
Operation in parallel star connection, intersection A with load torque (Fig. 4)
In the above, one of the three-phase stator windings 12 is connected in a delta connection, and is switched in parallel with the star connection of the other three-phase stator winding 13. The switching at this time is such that the current of the single delta-connected three-phase stator winding 12 is 1/2 of that of the parallel delta connection, and the single star-connected three-phase stator winding 13 is one-half of the parallel delta connection.
Since it is 6, the current changes from the ratio 1/3 to the ratio 4/6. Further, the operation is performed in the parallel star-delta connection, and at the intersection B with the load torque, the operation is switched to the next parallel delta connection. At this time, the current changes from the ratio 4/6 to the ratio 1.
【００４９】最初の交点Ａでの電流変化は１／３から４
／６への変化である。これは従来のスタ−デルタ切換始
動時のトルク比率１／３から１への大きな変化とは比較
できない程小さいものである。つぎの交点Ｂでの電流変
化は４／６から１であるが、この時すでに定格回転数近
くでの切換となるため負荷電流もきわめて小さな値とな
っており、ここでの４／６から１への変化が及ぼす影響
は従来と比較してきわめて小さいものとなっている。ま
たこの切換装置２０によって、単デルタ結線だけによる
トルクを並列スタ−結線の次に加えると、入力及び電流
の変化率をさらに小さくすることができる。これらのこ
とは前述したように、２個の三相固定子巻線で誘導電動
機を構成していることから、それぞれの組の電動機が有
効に作用して一体となったトルクを出しているからであ
る。しかもそれぞれを同じ容量の電動機で構成すればそ
れぞれの定格は従来の１／２であり、組み込むべき電気
回路の容量もそれに比例して安価となり、性能価格両面
に亘って多大な効果を有するものである。The current change at the first intersection point A is 1/3 to 4
/ 6. This is so small that it cannot be compared with the conventional large change from 1/3 to 1 at the start of the star-delta switching. The current change at the next intersection B is from 4/6 to 1, but at this time, since the switching has already been performed near the rated speed, the load current is also extremely small, and the current change from 4/6 to 1 here. The effect of the change to is much smaller than before. Further, when the torque by only the single delta connection is applied after the parallel star connection by the switching device 20, the rate of change of the input and current can be further reduced. As described above, since the induction motor is configured by the two three-phase stator windings as described above, the respective sets of motors effectively work to generate integrated torque. It is. In addition, if the motors are configured with the same capacity motors, the respective ratings are 1/2 of the conventional ones, and the capacity of the electric circuit to be built becomes inexpensive in proportion thereto, which has a great effect on both performance and price. is there.
【００５０】最後に切換装置２５のにおける固定子巻線
１２，１３と開閉装置Ｓとの結線を示す結線図の第３例
を図８に示した。つまり三相固定子巻線１２の一方は電
源Ｒ，Ｓ，Ｔにメイン開閉装置Ｓ１を介して接続され、
三相固定子巻線１２の他方はデルタ結線のため三相固定
子巻線１２の一方側に接続されている。また、三相固定
子巻線１３は開閉装置Ｓ３を介して三相固定子巻線１２
と並列に接続されると同時にデルタ結線となっている。Finally, FIG. 8 shows a third example of a connection diagram showing the connection between the stator windings 12 and 13 and the switching device S in the switching device 25. That is, one of the three-phase stator windings 12 is connected to the power supplies R, S, and T via the main switchgear S1,
The other of the three-phase stator windings 12 is connected to one side of the three-phase stator windings 12 for delta connection. Further, the three-phase stator winding 13 is connected to the three-phase stator winding 12 via the switch S3.
It is connected in parallel with Delta connection.
【００５１】図８の切換装置による誘導電動機によっ
て、負荷が運転・停止あるいは負荷が高低を繰り返すコ
ンプレッサ−等を駆動する場合について説明する。この
場合切換装置２０によって、始動は開閉装置Ｓ１，Ｓ３
を閉じて三相固定子巻線１２，１３をデルタ結線にして
起動し、起動後直ちに開閉装置Ｓ３を開いて２個の三相
固定子巻線１２，１３のうち三相固定子巻線１２のみに
給電を切り換え、ある場合は高負荷の時には開閉装置Ｓ
３を閉じて２個の三相固定子巻線１２，１３に給電し、
低負荷の時には開閉装置Ｓ３を開いて一方の三相固定子
巻線１２のみに給電するようにした。A case will be described in which the induction motor driven by the switching device of FIG. 8 drives a compressor or the like in which the load is operated / stopped or the load repeatedly changes in height. In this case, the switching device 20 starts the switching devices S1, S3.
Is closed and the three-phase stator windings 12 and 13 are connected in a delta connection and started up. Immediately after startup, the switch S3 is opened and the three-phase stator windings 12 and 13 of the two three-phase stator windings 12 and 13 are opened. The power supply is switched only to the switching device S in some cases when the load is high.
3 is closed and power is supplied to the two three-phase stator windings 12 and 13;
When the load is low, the switch S3 is opened to supply power to only one of the three-phase stator windings 12.
【００５２】小型のものはあまり問題とならないが、大
型のコンプレッサ−になると、運転・停止を繰り返し、
スタ−デルタ始動では始動トルクが足りず電動機が大型
になり、直入れ始動だけでは繰り返しに耐えられない。
従って、大トルク（２個の三相固定子巻線１２，１３）
とその半分（一方の三相固定子巻線１２）のトルク特性
を持つ誘導電動機で、起動の瞬間だけ大きいトルク（図
４の並デルタ結線）で始動して、直ちに半分のトルク特
性（図４の単デルタ結線）に切り換えることにより、大
量の始動電流を速やかに半分程度まで減少させることが
できるので、従来の直入れだけのものより電動機の温度
上昇は少なくなっている。Although a small compressor does not cause much problem, a large compressor repeatedly starts and stops operation.
In the star delta start, the starting torque is insufficient and the motor becomes large, so that it cannot withstand repetition only by the direct start.
Therefore, a large torque (two three-phase stator windings 12, 13)
An induction motor having a torque characteristic of half of that (one of the three-phase stator windings 12) and starting with a large torque (parallel delta connection in FIG. 4) only at the moment of startup, and immediately halving the torque characteristic (FIG. 4) By switching to a single delta connection, a large amount of starting current can be rapidly reduced to about half, so that the temperature rise of the electric motor is smaller than that of the conventional direct connection type.
【００５３】次に連続運転で高負荷・低負荷を繰り返す
ものは、従来の電動機では高負荷の時も低負荷の時も同
じトルクで運転しているため、エア−を消費していない
低負荷にも関わらず消費電力が大きい。これを従来のス
タ−デルタ始動を用いて低負荷時にスタ−接続して運転
するものもあるが、このスタ−デルタの切換は、スタ−
時とデルタ時とのトルク差が大きく、また一旦電源から
すべて切り離されるため接点の磨耗などメンテナンスが
心配されていた。従って、大トルク（並デルタ結線）と
その半分のトルク特性（単デルタ結線）を持つ誘導電動
機で、高負荷時には大トルクにして運転して、低負荷時
には半分のトルクで運転することにより、低負荷時には
少ない消費電力で運転でき、しかも大きいトルクと半分
のトルクとの切換は、電源から一方の三相固定子巻線１
２が全く切り離されることがなく、しかも切り離される
他方の三相固定子巻線１３の負荷電流も定格のほぼ半分
となることから開閉装置Ｓの接点の磨耗等のメンテナン
スにおいても信頼性を向上させることができた。Next, in the conventional motor which repeats a high load and a low load in continuous operation, the conventional motor is operated with the same torque at both a high load and a low load, so that a low load without consuming air is used. Nevertheless, the power consumption is large. Some of them are operated in a star connection at a low load by using the conventional star-delta starting.
There was a large torque difference between the time and the delta time, and since the power supply was once disconnected from the power supply, there were concerns about maintenance such as wear of the contacts. Therefore, an induction motor having a large torque (normal delta connection) and half its torque characteristics (single delta connection) can be operated at a high torque at a high load and at a low torque at a low load by operating at a half torque. When a load is applied, the motor can be operated with low power consumption, and switching between large torque and half torque is performed by switching one of the three-phase stator windings 1 from the power supply.
2 is not separated at all, and the load current of the other three-phase stator winding 13 to be separated becomes almost half of the rated value. Therefore, the reliability is improved in maintenance such as wear of the contacts of the switchgear S. I was able to.
【００５４】以上の実施例において、例えば図７の結線
で開閉装置Ｓ２を閉じて単スタ−結線にすれば、図４に
示した並スタ−のトルク特性の半分となり、より二乗低
減負荷に適合したトルク特性を得ることができる。In the above embodiment, for example, if the switch S2 is closed by the connection shown in FIG. 7 to form a single star connection, the torque characteristic of the parallel star shown in FIG. The obtained torque characteristics can be obtained.
【００５５】[0055]
【発明の効果】以上のことから、慣性の大きな負荷のた
めに起動時に合わせた出力のまま運転中無駄な電力を消
費したり、あるいは汎用の電動機でありながら特別に始
動時の電流を抑えることを目的とした始動装置を設けた
ために特殊用途での電動機になっていたが、本発明によ
り、汎用の誘導電動機のように負荷を選ばず、また特別
の高価な始動装置をも必要とせず、大きな慣性負荷用の
電動機としても、自家発電設備用の負荷としても、また
起動・停止を繰り返したり負荷時と非負荷時とで出力を
使い分けるコンプレッサ−の電動機としても、誘導電動
機としての能力を十分発揮させながら、どのような用途
にも電動機として効率良く使用することができるように
した安価な誘導電動機とその始動運転方法が提供でき
た。As described above, useless power is consumed during operation with the output adjusted at the time of startup due to a large inertia load, or the current at the time of startup is specially suppressed even with a general-purpose motor. Although it was a motor for special use because of providing a starting device for the purpose, according to the present invention, it does not choose a load like a general-purpose induction motor, and also does not require a special expensive starting device, Sufficient capacity as an induction motor, whether as a motor for a large inertial load, as a load for a private power generation facility, or as a compressor motor that repeatedly starts and stops or uses the output depending on whether the load is applied or not. An inexpensive induction motor that can be efficiently used as a motor in any application while exhibiting its function, and a start-up operation method thereof can be provided.
【図１】本発明の誘導電動機による駆動装置の断面図。FIG. 1 is a cross-sectional view of a drive device using an induction motor according to the present invention.
【図２】本発明の別の誘導電動機による駆動装置の構成
図。FIG. 2 is a configuration diagram of a drive device using another induction motor according to the present invention.
【図３】慣性の大きい負荷を駆動する場合に有効な結線
図。FIG. 3 is a wiring diagram effective when driving a load having a large inertia.
【図４】本発明のそれぞれの結線におけるトルク特性。FIG. 4 is a graph showing torque characteristics in each connection according to the present invention.
【図５】本発明のそれぞれの結線における電流特性。FIG. 5 shows current characteristics in each connection according to the present invention.
【図６】本発明のそれぞれの結線における入力特性。FIG. 6 is an input characteristic in each connection of the present invention.
【図７】非常用発電設備のポンプ・ファンを負荷とした
場合に有効な本発明の結線図。FIG. 7 is a connection diagram of the present invention that is effective when a pump / fan of an emergency power generation facility is used as a load.
【図８】運転・停止を繰り返す負荷に有効な本発明の結
線図。FIG. 8 is a connection diagram of the present invention effective for a load that repeatedly starts and stops.
【図９】従来のスタ−デルタ切換によるトルク特性。FIG. 9 shows a torque characteristic by a conventional star-delta switching.
【図１０】従来のスタ−デルタ切換による電流特性。FIG. 10 shows current characteristics obtained by conventional star-delta switching.
【図１１】従来のスタ−デルタ切換による入力特性。FIG. 11 shows input characteristics obtained by conventional star-delta switching.
１ 誘導電動機 ２ 回転軸 ３ 回転子コア ４ 回転子コア ５ 回転子導体 ６ 回転子導体 ７ 短絡環 ８ 短絡環 ９ 回転子 １０ 固定子コア １１ 固定子コア １２ 固定子巻線 １３ 固定子巻線 １４ 固定子 １５ 固定子 １６ 機枠 １７ 玉軸受け １８ 玉軸受け １９ 玉受け盤 ２０ 軸受け盤 ２１ 切換装置 ２２ 負荷（ポンプ） ２３ 誘導電動機 ２４ 誘導電動機 ２５ 切換装置 ２６ 電源 ２７ カップリング ２８ プ−リ ２９ ベルト Ｓ 開閉装置 DESCRIPTION OF SYMBOLS 1 Induction motor 2 Rotating shaft 3 Rotor core 4 Rotor core 5 Rotor conductor 6 Rotor conductor 7 Short-circuit ring 8 Short-circuit ring 9 Rotor 10 Stator core 11 Stator core 12 Stator winding 13 Stator winding 14 Stator 15 Stator 16 Machine frame 17 Ball bearing 18 Ball bearing 19 Ball bearing board 20 Bearing board 21 Switching device 22 Load (pump) 23 Induction motor 24 Induction motor 25 Switching device 26 Power supply 27 Coupling 28 Pulley 29 Belt S Switchgear
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭53−102018（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) H02P 1/00 - 1/58 H02K 17/00 - 17/44 H02K 16/00 - 16/04 H02P 5/46 - 5/52 H02P 7/67 - 7/80────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Utility Model Showa 53-102018 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) H02P 1/00-1/58 H02K 17 / 00-17/44 H02K 16/00-16/04 H02P 5/46-5/52 H02P 7/67-7/80
Claims (8)
子と、該２個の回転子それぞれに対峙して固定子巻線を
巻装した２個の固定子とからなる誘導電動機と、一方の
固定子巻線と他方の固定子巻線を同時に又は個別に電源
に接続すると共に、各固定子巻線の電源に対する結線を
個別にスター結線あるいはデルタ結線に切り換える切換
装置とを具備した駆動装置において、 第１に２個の固定子巻線それぞれをデルタ結線にして給
電し、定格回転数に至った後、第２に一方の固定子巻線
をスターあるいはデルタ結線にしてその固定子巻線のみ
に給電することを特徴とする誘導電動機による駆動装
置。1. An induction motor comprising two cage rotors mounted on the same rotating shaft, and two stators each having a stator winding wound facing each of the two rotors. And a switching device for connecting one stator winding and the other stator winding simultaneously or individually to a power supply, and individually switching the connection of each stator winding to the power supply to a star connection or a delta connection. In the drive device, first, two stator windings are each connected in a delta connection to supply power, and after reaching a rated speed, second, one of the stator windings is connected in a star or delta connection to fix the stator winding. A drive device using an induction motor, wherein power is supplied only to a child winding.
台の誘導電動機と、一方の誘導電動機の固定子巻線と他
方の誘導電動機の固定子巻線を同時に又は個別に電源に
接続すると共に、各固定子巻線の電源に対する結線を個
別にスター結線あるいはデルタ結線に切り換える切換装
置とを具備した駆動装置において、 第１に２個の固定子巻線それぞれをデルタ結線にして給
電し、定格回転数に至った後、第２に一方の固定子巻線
をスターあるいはデルタ結線にしてその固定子巻線のみ
に給電することを特徴とする誘導電動機による駆動装
置。2. The two connected to drive the same load.
One induction motor, the stator winding of one induction motor and the stator winding of the other induction motor are connected to the power supply simultaneously or individually, and the connection of each stator winding to the power supply is individually star-connected. Alternatively, in a drive device having a switching device for switching to a delta connection, first, two stator windings are supplied in a delta connection to supply power. A drive device using an induction motor, wherein a wire is connected in a star or delta connection and power is supplied only to the stator winding.
子と、該２個の回転子それぞれに対峙して第１と第２の
三相固定子巻線をそれぞれ巻装した第１と第２の固定子
とからなる誘導電動機と、 第１及び第２の三相固定子巻線の各一方を電源に対して
接続するための共通電源開閉器と、第１の三相固定子巻
線の他方に三相固定子巻線をスター接続とするための第
１のスター開閉器と、第１の三相固定子巻線をデルタ接
続とするために該巻線に並列に接続した第１のデルタ開
閉器と、第２の三相固定子巻線の他方に三相固定子巻線
をスター接続とするための第２のスター開閉器と、第２
の三相固定子巻線をデルタ接続とするために該巻線に並
列に接続した第２のデルタ開閉器とを備えた切換装置
と、から構成した誘導電動機の駆動装置において、 切換装置は、第１の接続として、第１と第２のスター開
閉器を閉じてスター結線にして電源開閉器を閉じて給電
し、第２の接続として、第１のスター開閉器のみを開放
した後第１のデルタ開閉器を閉じて第１の固定子巻線を
デルタ結線にし、第３の接続として、第２のスター開閉
器を開放した後第２のデルタ開閉器を閉じることによ
り、第１と第２の三相固定子巻線をともにデルタ結線に
することを特徴とする誘導電動機の駆動装置の始動運転
方法。3. A two-cage rotor, which is axially mounted on the same rotating shaft, and a first and a second three-phase stator winding wound around the two rotors, respectively. An induction motor comprising a first stator and a second stator, a common power switch for connecting one of the first and second three-phase stator windings to a power source, and a first three-phase stator A first star switch for star-connecting a three-phase stator winding to the other of the stator windings, and a parallel connection to the first three-phase stator winding for delta connection; A first delta switch, a second star switch for star-connecting the three-phase stator winding to the other of the second three-phase stator windings, and a second star switch.
And a second delta switch connected in parallel to the three-phase stator winding to form a delta connection with the three-phase stator winding. As a first connection, the first and second star switches are closed to form a star connection, a power switch is closed, and power is supplied. As a second connection, only the first star switch is opened and then the first switch is opened. The first stator winding in a delta connection and, as a third connection, opening the second star switch and then closing the second delta switch to provide a first and a second connection. 2. A starting operation method for an induction motor driving device, wherein the two three-phase stator windings are both delta-connected.
１と第２の誘導電動機と、 第１及び第２の誘導電動機の各三相固定子巻線の各一方
を電源に対して接続するための共通電源開閉器と、第１
の誘導電動機の三相固定子巻線の他方に三相固定子巻線
をスター接続とするための第１のスター開閉器と、第１
の誘導電動機の三相固定子巻線をデルタ接続とするため
に該巻線に並列に接続した第１のデルタ開閉器と、第２
の誘導電動機の三相固定子巻線の他方に三相固定子巻線
をスター接続とするための第２のスター開閉器と、第２
の誘導電動機の三相固定子巻線をデルタ接続とするため
に該巻線に並列に接続した第２のデルタ開閉器とを備え
た切換装置と、から構成した誘導電動機の駆動装置にお
いて、 切換装置は、第１の接続として、第１と第２のスター開
閉器を閉じて第１及び第２の誘導電動機の三相固定子巻
線をそれぞれスター結線にして電源開閉器を閉じて給電
し、第２の接続として、第１のスター開閉器のみを開放
した後第１のデルタ開閉器を閉じて第１の誘導電動機の
三相固定子巻線をデルタ結線にし、第３の接続として、
第２のスター開閉器を開放して第２のデルタ開閉器を閉
じることにより、第１と第２の誘導電動機の固定子巻線
をともにデルタ結線にすることを特徴とする誘導電動機
の駆動装置の始動運転方法。4. A first and second induction motor connected to drive the same load, and one of each of three-phase stator windings of the first and second induction motors connected to a power supply. A common power switch for
A first star switch for star-connecting the three-phase stator winding to the other of the three-phase stator windings of the induction motor;
A first delta switch connected in parallel with the three-phase stator windings of the induction motor to form a delta connection;
A second star switch for star-connecting the three-phase stator winding to the other of the three-phase stator windings of the induction motor;
And a second delta switch connected in parallel to the three-phase stator winding of the induction motor for delta connection. In the first connection, the first and second star switches are closed, and the three-phase stator windings of the first and second induction motors are respectively connected in a star connection, and the power switch is closed to supply power. As a second connection, after opening only the first star switch, the first delta switch is closed to make the three-phase stator winding of the first induction motor delta-connected, and as a third connection,
A drive device for an induction motor, wherein both the stator windings of the first and second induction motors are delta-connected by opening the second star switch and closing the second delta switch. Starting operation method.
けを閉じてスター結線にして電源開閉器を閉じて給電す
ることを特徴とする請求項３又は請求項４記載の誘導電
動機の駆動装置の始動運転方法。5. The induction motor according to claim 3, wherein before the first connection, only the first star switch is closed to form a star connection, and the power switch is closed to supply power. Of starting operation of the driving device of the invention.
子と、該２個の回転子それぞれに対峙して固定子巻線を
巻装した２個の固定子とからなる誘導電動機と、一方の
固定子巻線と他方の固定子巻線を同時に又は個別に電源
に接続すると共に、各固定子巻線の電源に対する結線を
個別にスター結線あるいはデルタ結線に切り換える切換
装置とを具備した駆動装置において、 第１に２個の固定子巻線の何れか一方のみをデルタ結線
にして給電し、第２に他方の固定子巻線をスター結線に
して給電し、第３に前記他方の固定子巻線の電源への接
続をスター結線からデルタ結線に切り換えて給電するこ
とを特徴とする誘導電動機による駆動装置。6. An induction motor comprising two cage rotors mounted on the same rotating shaft, and two stators each having a stator winding wound facing each of the two rotors. And a switching device for connecting one stator winding and the other stator winding simultaneously or individually to a power supply, and individually switching the connection of each stator winding to the power supply to a star connection or a delta connection. In the drive device, first, any one of the two stator windings is supplied with power in a delta connection, the other is supplied with the other stator winding in a star connection, and third, the other is supplied with power. Wherein the stator winding is connected to a power source by switching from a star connection to a delta connection to supply power.
台の誘導電動機と、一方の誘導電動機の固定子巻線と他
方の誘導電動機の固定子巻線を同時に又は個別に電源に
接続すると共に、各固定子巻線の電源に対する結線を個
別にスター結線あるいはデルタ結線に切り換える切換装
置とを具備した駆動装置において、 第１に２台の誘導電動機の何れか一方の固定子巻線のみ
をデルタ結線にして給電し、第２に他方の誘導電動機の
固定子巻線をスター結線にして給電し、第３に前記他方
の誘導電動機の固定子巻線の電源への接続をスター結線
からデルタ結線に切り換えて給電することを特徴とする
誘導電動機による駆動装置。7. The two connected to drive the same load.
One induction motor, the stator winding of one induction motor and the stator winding of the other induction motor are connected to the power supply simultaneously or individually, and the connection of each stator winding to the power supply is individually star-connected. Alternatively, in a driving device having a switching device for switching to delta connection, first, only one of the stator windings of the two induction motors is supplied with the delta connection, and second, the other induction motor is fixed. Thirdly, a drive device is driven by an induction motor, wherein the power supply is performed by switching the stator winding of the other induction motor from a star connection to a delta connection. .
子と、該２個の回転子それぞれに対峙して固定子巻線を
巻装した２個の固定子とからなる誘導電動機と、一方の
固定子巻線と他方の固定子巻線を同時に又は個別に電源
に接続すると共に、各固定子巻線の電源に対する結線を
個別にスター結線あるいはデルタ結線に切り換える切換
装置とを具備した駆動装置において、 切換装置は、２個の固定子巻線それぞれをデルタ結線に
し、２個の固定子巻線の両方と一方とに給電を切換可能
にしたことを特徴とする誘導電動機による駆動装置。8. An induction motor comprising two cage rotors mounted on the same rotating shaft, and two stators each having a stator winding wound facing each of the two rotors. And a switching device for connecting one stator winding and the other stator winding simultaneously or individually to a power supply, and individually switching the connection of each stator winding to the power supply to a star connection or a delta connection. The drive device according to claim 1, wherein the switching device comprises a delta connection for each of the two stator windings, and the power supply can be switched to both and one of the two stator windings. apparatus.
Priority Applications (14)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7350555A JP2798033B2 (en) | 1995-04-27 | 1995-12-22 | Drive device using induction motor and method of starting operation thereof |
| TW085115438A TW396673B (en) | 1995-12-22 | 1996-12-13 | Induction motor driving device and the method for its starting operation |
| IN2167CA1996 IN190575B (en) | 1995-12-22 | 1996-12-16 | |
| CA002193051A CA2193051C (en) | 1995-12-22 | 1996-12-16 | Driving means formed by induction motor and method for starting the same |
| DE69624208T DE69624208T2 (en) | 1995-12-22 | 1996-12-17 | Driving means with an induction motor and method for starting the same |
| DK96309197T DK0780961T3 (en) | 1995-12-22 | 1996-12-17 | Drive means formed by induction motor and method for starting them |
| EP96309197A EP0780961B1 (en) | 1995-12-22 | 1996-12-17 | Driving means formed by induction motor and method for starting the same |
| US08/767,785 US5838135A (en) | 1995-12-22 | 1996-12-17 | Driving means formed by induction motor and method for starting the same |
| MYPI96005327A MY116695A (en) | 1995-12-22 | 1996-12-18 | Driving means formed by induction motor and method for starting the same |
| KR1019960068881A KR100337688B1 (en) | 1995-12-22 | 1996-12-20 | Power supply method to induction motor |
| NO19965502A NO315220B1 (en) | 1995-12-22 | 1996-12-20 | Drive device formed by induction motor and method of starting the same |
| CNB961173971A CN1134097C (en) | 1995-12-22 | 1996-12-21 | Driving gear and starting operation method of induction motor |
| AU76441/96A AU702631B2 (en) | 1995-12-22 | 1996-12-23 | Driving means formed by induction motor and method for starting the same |
| US09/094,403 US6154003A (en) | 1995-12-22 | 1998-06-10 | Driving means formed by induction motor and method for starting the same |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7-129369 | 1995-04-27 | ||
| JP12936995 | 1995-04-27 | ||
| JP7350555A JP2798033B2 (en) | 1995-04-27 | 1995-12-22 | Drive device using induction motor and method of starting operation thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0919116A JPH0919116A (en) | 1997-01-17 |
| JP2798033B2 true JP2798033B2 (en) | 1998-09-17 |
Family
ID=26464789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7350555A Expired - Lifetime JP2798033B2 (en) | 1995-04-27 | 1995-12-22 | Drive device using induction motor and method of starting operation thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2798033B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019106793A (en) * | 2017-12-12 | 2019-06-27 | 本田技研工業株式会社 | Rotary electric machine unit |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012090519A (en) * | 2010-09-20 | 2012-05-10 | Kurita Kogyo:Kk | Rotation system |
| US9935523B2 (en) | 2014-03-18 | 2018-04-03 | Mitsubishi Electric Corporation | Mechanical device |
| JP6701568B2 (en) * | 2016-04-22 | 2020-05-27 | 株式会社サタケ | Substandard induction motor |
| FI20165891A (en) * | 2016-11-24 | 2018-05-25 | Normet Oy | METHOD AND ARRANGEMENTS FOR OPERATING THE POWER UNIT |
| JP7247722B2 (en) * | 2019-03-28 | 2023-03-29 | 株式会社サタケ | electric motor system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53102018U (en) * | 1977-01-24 | 1978-08-17 |
-
1995
- 1995-12-22 JP JP7350555A patent/JP2798033B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019106793A (en) * | 2017-12-12 | 2019-06-27 | 本田技研工業株式会社 | Rotary electric machine unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0919116A (en) | 1997-01-17 |
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