JPH0734665B2 - Induction motor drive - Google Patents
Induction motor driveInfo
- Publication number
- JPH0734665B2 JPH0734665B2 JP1126145A JP12614589A JPH0734665B2 JP H0734665 B2 JPH0734665 B2 JP H0734665B2 JP 1126145 A JP1126145 A JP 1126145A JP 12614589 A JP12614589 A JP 12614589A JP H0734665 B2 JPH0734665 B2 JP H0734665B2
- Authority
- JP
- Japan
- Prior art keywords
- induction motor
- frequency
- switch
- voltage converter
- inverter
- 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.)
- Expired - Fee Related
Links
Landscapes
- Motor And Converter Starters (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明はインバータ装置を適用した誘導電動機の駆動
装置に関するものである。The present invention relates to a drive device for an induction motor to which an inverter device is applied.
第２図は、例えば昭和53年電気関係学会関西支部連合大
会、論文番号、G3−17川畑，他『VVVF（バリアブル・ボ
ルテージ，バリアブル・フレクエンシイ）による送風機
の省エネルギー駆動』に示された従来の誘導電動機の駆
動装置であり、図において、１は誘導電動機、２はイン
バータ装置、３は誘導電動機１の残留電圧を増幅する増
幅整形回路、４は増幅整形回路３から出力されたパルス
を電圧に変換する周波数−電圧変換器、５は停止中スイ
ッチ、６は基準信号を出力する速度設定器、７はクッシ
ョン回路、８は電圧−周波数変換回路である。Figure 2 shows the conventional induction shown in "Electrical Society of Japan Kansai Branch Union Conference, 1993, paper number, G3-17 Kawabata, et al.," Energy-saving drive of blower by VVVF (Variable voltage, Variable frequency) ". In the figure, 1 is an induction motor, 2 is an inverter device, 2 is an inverter device, 3 is an amplification and shaping circuit that amplifies the residual voltage of the induction motor 1, and 4 is a pulse that is output from the amplification and shaping circuit 3 and is converted into a voltage. Is a frequency-voltage converter, 5 is a switch during stop, 6 is a speed setter for outputting a reference signal, 7 is a cushion circuit, and 8 is a voltage-frequency conversion circuit.
次に動作について説明する。Next, the operation will be described.
まず、インバータ装置２は給電を停止しているが誘導電
動機１は惰行減速中にあるものとする。この状態で誘導
電動機１の残留電圧を増幅整形回路３によってパルス列
に変換して周波数−電圧変換器４に入力する。停止中ス
イッチ５は前記周波数−電圧変換器４によって変換され
た電圧を接点ｂ側に切換えて接続し、接点ａ側のトラン
スファ端子には速度設定器６の出力を接続している。周
波数−電圧変換器４の出力電圧は前記誘導電動機１の惰
行回転数に比例しているため、インバータ装置２に作用
する電圧−周波数変換回路８の出力周波数は上記惰行回
転数に比例する。First, it is assumed that the inverter device 2 is not supplying power but the induction motor 1 is in coasting deceleration. In this state, the residual voltage of the induction motor 1 is converted into a pulse train by the amplification and shaping circuit 3 and input to the frequency-voltage converter 4. The stop switch 5 connects the voltage converted by the frequency-voltage converter 4 to the contact b side by switching, and the transfer terminal on the contact a side is connected to the output of the speed setting device 6. Since the output voltage of the frequency-voltage converter 4 is proportional to the coasting speed of the induction motor 1, the output frequency of the voltage-frequency conversion circuit 8 acting on the inverter device 2 is proportional to the coasting speed.
この時、図示されない起動指令回路より運転信号Ｄがイ
ンバータ装置２に与えられると、インバータ装置２は上
記誘導電動機１の惰行回転数相当の周波数で給電をなめ
らかに開始する。その後、スイッチ５をａ側に切換えて
基準信号である速度設定器６側に接続する。誘導電動機
１は前記速度設定器６の基準信号に従って出力されるイ
ンバータ装置２の給電周波数によって制御される。At this time, when the operating signal D is given to the inverter device 2 from a start command circuit (not shown), the inverter device 2 smoothly starts feeding at a frequency corresponding to the coasting speed of the induction motor 1. After that, the switch 5 is switched to the a side and connected to the speed setter 6 side which is a reference signal. The induction motor 1 is controlled by the power supply frequency of the inverter device 2 output according to the reference signal of the speed setting device 6.
従来の誘導電動機の駆動装置は以上の様に構成されてい
るので、惰行減速中の誘導電動機１が何らかの外力によ
り逆転している場合でも、これを検出することができな
い。このような場合に誤まってインバータ装置２を駆動
し給電を開始すると、誘導電動機１は瞬間的に回転方向
を変えるため出力電流が過大となり、良好な運転を行う
ことができない。従って、このような場合には、誘導電
動機１の回転数が完全に停止するまで待つ必要がある等
の課題があった。Since the conventional drive device for the induction motor is configured as described above, even if the induction motor 1 during coasting deceleration is reversed by some external force, this cannot be detected. In such a case, if the inverter device 2 is erroneously driven and power supply is started, the induction motor 1 instantaneously changes the rotation direction, so that the output current becomes excessively large and it is not possible to perform good operation. Therefore, in such a case, there is a problem that it is necessary to wait until the rotation speed of the induction motor 1 is completely stopped.
この発明は上記のような課題を解消するためになされた
もので、逆転中の誘導電動機に対してもインバータ装置
により安定に給電を開始することができる誘導電動機の
駆動装置を得ることを目的とする。The present invention has been made to solve the above problems, and an object of the present invention is to obtain a drive device for an induction motor that can stably start power supply to the induction motor during reverse rotation by the inverter device. To do.
この発明に係る誘導電動機の駆動装置は速度設定器の極
性により比較器の出力を選択動作させ、その比較器の出
力によってスイッチを切換動作させる。前記スイッチは
正転側端子と反転器に接続された逆転側端子とを有し、
惰行減速中の誘導電動機の回転方向により惰行周波数の
極性を切換えて、切換出力を停止中スイッチによってイ
ンバータ側に供給するようにしたものである。The drive device for an induction motor according to the present invention selectively operates the output of the comparator according to the polarity of the speed setting device, and switches the switch according to the output of the comparator. The switch has a forward rotation side terminal and a reverse rotation side terminal connected to an inverter,
The polarity of the coasting frequency is switched according to the rotation direction of the induction motor during coasting deceleration, and the switching output is supplied to the inverter side by the switch during stop.
この発明におけるスイッチを選択切換する比較器は速度
設定器で設定される極性に従って出力を切換えられる。
前記スイッチはトランスファ接点を有し正転側端子に周
波数−電圧変換器の出力を接続し、逆転側端子には反転
器を介して該周波数−電圧変換器の出力に接続する。そ
して、惰行減速中の誘導電動機の回転方向によって該ス
イッチの入力端子は選択される。The comparator for selectively switching the switch in the present invention can switch the output according to the polarity set by the speed setter.
The switch has a transfer contact, the output of the frequency-voltage converter is connected to the forward rotation side terminal, and the output of the frequency-voltage converter is connected to the reverse rotation side terminal via an inverter. Then, the input terminal of the switch is selected according to the rotation direction of the induction motor during coasting deceleration.
以下、この発明の一実施例を図について説明する。図
中、第２図と同一の部分は同一の符号をもって図示した
第１図において、12は比較器で速度設定器６の設定方向
（極性）に応じて動作を行うもので、スイッチ13のトラ
ンスファ接点の端子ｃ（正転側端子）、及び端子ｄ（逆
転側端子）を選択動作する。11は反転器で、誘導電動機
１の惰行周波数の極性を切換えるためのものである。す
なわち、速度設定器６の出力が正転時にはスイッチ13は
端子ｃ側に選択して接続されており、惰行周波数の極性
は切換わらない。速度設定器６の出力が逆転時にはスイ
ッチ13は端子ｄ側に接続され惰行周波数の極性は反転す
る。An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the same parts as those in FIG. 2 are shown with the same reference numerals, and in FIG. 1, reference numeral 12 is a comparator which operates according to the setting direction (polarity) of the speed setting device 6, and the transfer of the switch 13 is performed. The terminal c (forward rotation side terminal) and the terminal d (reverse rotation side terminal) of the contact are selectively operated. Reference numeral 11 is an inverter for switching the polarity of the coasting frequency of the induction motor 1. That is, when the output of the speed setter 6 is forward, the switch 13 is selectively connected to the terminal c side and the polarity of the coasting frequency is not switched. When the output of the speed setting device 6 is reversed, the switch 13 is connected to the terminal d side and the polarity of the coasting frequency is reversed.
次に動作について説明する。まず通常の惰行（正転）中
の誘導電動機１へインバータ装置２によって給電する場
合には速度設定器６は本来の速度指令を出力しており誘
導電動機１より検出された惰行周波数の極性は反転され
ず、給電開始時にはインバータ装置２の相順と誘導電動
機１の回転方向は一致しており、円滑な給電を開始す
る。Next, the operation will be described. First, when power is supplied to the induction motor 1 during normal coasting (forward rotation) by the inverter device 2, the speed setter 6 outputs the original speed command and the polarity of the coasting frequency detected by the induction motor 1 is reversed. However, the phase sequence of the inverter device 2 and the rotation direction of the induction motor 1 match at the start of power feeding, and smooth power feeding is started.
次に何らかの外力により誘導電動機１が逆転している場
合には、速度設定器６の速度指令の極性を反転させる。
この動作により比較器12の出力は反転し、スイッチ13は
端子ｃ側から端子ｄ側に切換えられる。従って、惰行周
波数の極性は反転される。このため給電開始時にはイン
バータ装置２の相順も逆転するので、誘導電動機１の回
転方向とインバータ装置２の相順は一致し、円滑な運転
を開始することができる。Next, when the induction motor 1 is reversely rotated by some external force, the polarity of the speed command of the speed setter 6 is reversed.
By this operation, the output of the comparator 12 is inverted and the switch 13 is switched from the terminal c side to the terminal d side. Therefore, the polarity of the coasting frequency is reversed. For this reason, the phase sequence of the inverter device 2 is also reversed at the start of power supply, so that the rotation direction of the induction motor 1 and the phase sequence of the inverter device 2 coincide with each other, and smooth operation can be started.
以上のように、この発明によれば惰行中の誘導電動機の
惰行周波数の極性を速度設定器の基準信号の極性に応じ
て切換え可能に回路構成したので、逆転惰行中の誘導電
動機に対しても回転方向を切換えた後にインバータ装置
から給電するため安定に給電（運転）を開始することが
できる効果がある。As described above, according to the present invention, since the polarity of the coasting frequency of the induction motor during coasting can be switched according to the polarity of the reference signal of the speed setter, the circuit configuration is also possible for the induction motor during reverse coasting. Since power is supplied from the inverter device after switching the rotation direction, there is an effect that power supply (operation) can be stably started.
第１図はこの発明の一実施例による誘導電動機の駆動装
置の要部回路図、第２図は従来の誘導電動機の駆動装置
ブロック図である。 図において、１は誘導電動機、２はインバータ装置、４
は周波数−電圧変換器、５は停止中スイッチ、６は速度
設定器、11は反転器、12は比較器、13はスイッチであ
る。 なお、図中、同一符号は同一または相当部分を示す。FIG. 1 is a circuit diagram of a main part of a drive device for an induction motor according to an embodiment of the present invention, and FIG. 2 is a block diagram of a drive device for a conventional induction motor. In the figure, 1 is an induction motor, 2 is an inverter device, 4
Is a frequency-voltage converter, 5 is a switch during stop, 6 is a speed setter, 11 is an inverter, 12 is a comparator, and 13 is a switch. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (1)
置と、惰行減速中の前記誘導電動機の残留電圧を周波数
に変換する周波数−電圧変換器と、惰行減速時、速度設
定器の出力端子から前記周波数−電圧変換器の出力端子
へ切り換わる停止中スイッチとを有し、前記周波数−電
圧変換器で決定された惰行減速時の給電周波数を前記イ
ンバータ装置に入力して前記誘導電動機の給電開始を行
う誘導電動機の駆動装置において、前記周波数−電圧変
換器の出力端子に直接接続した正転側端子と該出力端子
に反転器を介して接続した逆転側端子とを有するスイッ
チと、前記速度設定器の極性によって前記スイッチの切
り替え方向信号を出力する比較器とを備えたことを特徴
とする誘導電動機の駆動装置。1. An inverter device for variable speed control of an induction motor, a frequency-voltage converter for converting a residual voltage of the induction motor during coasting deceleration into a frequency, and an output terminal of a speed setter during coasting deceleration. It has a stop switch that switches to the output terminal of the frequency-voltage converter, and inputs the power supply frequency during coasting deceleration determined by the frequency-voltage converter to the inverter device to start power supply to the induction motor. In an induction motor drive device, a switch having a forward rotation side terminal directly connected to an output terminal of the frequency-voltage converter and a reverse rotation side terminal connected to the output terminal via an inverter, and the speed setting device. And a comparator that outputs a switching direction signal of the switch according to the polarity of the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1126145A JPH0734665B2 (en) | 1989-05-19 | 1989-05-19 | Induction motor drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1126145A JPH0734665B2 (en) | 1989-05-19 | 1989-05-19 | Induction motor drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02307378A JPH02307378A (en) | 1990-12-20 |
| JPH0734665B2 true JPH0734665B2 (en) | 1995-04-12 |
Family
ID=14927791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1126145A Expired - Fee Related JPH0734665B2 (en) | 1989-05-19 | 1989-05-19 | Induction motor drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0734665B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1324151B1 (en) | 1997-01-31 | 2008-02-20 | Seiko Epson Corporation | Developing unit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02106185A (en) * | 1988-10-13 | 1990-04-18 | Toshiba Corp | Speed regulator for induction motor |
-
1989
- 1989-05-19 JP JP1126145A patent/JPH0734665B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02307378A (en) | 1990-12-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5629480A (en) | Operation control device for motor | |
| JPH10136570A (en) | Charging device | |
| JPH0654586A (en) | Instantaneous power failure restart device for synchronous motor drive inverter | |
| JPH0734665B2 (en) | Induction motor drive | |
| JPH0736402Y2 (en) | Induction motor pole number switching device | |
| JP3675157B2 (en) | Electric propulsion device and control method thereof | |
| RU2101847C1 (en) | Thyristor asynchronous drive | |
| JP2823238B2 (en) | Power converter | |
| JPS6322156B2 (en) | ||
| JPH0583989A (en) | Switching operation unit for induction motor | |
| JPH08225292A (en) | Crane control equipment | |
| JP2599414B2 (en) | Transistor inverter device | |
| JP2001028802A (en) | Controller of motor and its method | |
| JPS5932381A (en) | Controller for induction motor | |
| JPH0448156Y2 (en) | ||
| SU826550A1 (en) | Method of control of dependent frequency converter | |
| SU1580517A1 (en) | Multimotor electric drive | |
| JPH0134559Y2 (en) | ||
| JPH0428797U (en) | ||
| JPS6244301U (en) | ||
| JPS63124100U (en) | ||
| JPS6337596B2 (en) | ||
| JPS5937891A (en) | Speed controller for dc motor | |
| JPS598968U (en) | elevator control device | |
| JPS63283402A (en) | electric car control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |