JPS60194788A - Power source of ac motor - Google Patents
Power source of ac motorInfo
- Publication number
- JPS60194788A JPS60194788A JP59048485A JP4848584A JPS60194788A JP S60194788 A JPS60194788 A JP S60194788A JP 59048485 A JP59048485 A JP 59048485A JP 4848584 A JP4848584 A JP 4848584A JP S60194788 A JPS60194788 A JP S60194788A
- Authority
- JP
- Japan
- Prior art keywords
- switching
- switching element
- motor
- contact
- state
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/26—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor
- H02P1/28—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor by progressive increase of voltage applied to primary circuit of motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor And Converter Starters (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は交流電動機の電源装置に関し、特に、電動機の
起動時、制御時等の限定された時間のみオンオフ制御さ
れるスイッチング素子を備えた電源装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power supply device for an AC motor, and more particularly to a power supply device equipped with a switching element that is controlled to be turned on and off only during a limited period of time, such as when starting or controlling a motor.
例えば、ディーゼル発電機による自家発電装置を用いて
揚水ポンプを運転する場合、揚水ポンプ駆動用モータの
起動時のみその電流を制限するスタータを付設し、完全
起動後は発電機とモータを直結することにより、起動時
における発電機に与える衝撃を緩和するとともに発電機
の容量を小型化する発明を、出願人は別途提案している
。本発明はこのようにある限定された時間のみスイッチ
ング素子を開閉制御し、定常運転時はそのスイッチング
素子を全開しておく構成の電源装置に適用される。For example, when operating a lift pump using a private power generation device using a diesel generator, it is recommended to install a starter that limits the current only when the lift pump drive motor starts up, and then connect the generator and motor directly after the motor starts up completely. The applicant has separately proposed an invention that reduces the impact on the generator during startup and reduces the capacity of the generator. The present invention is thus applied to a power supply device configured to control the opening and closing of a switching element only for a certain limited time, and to keep the switching element fully open during steady operation.
２００ボルトの交流電源によりサイリスクを介して交流
電動機を回転制御する場合、サイリスクが制御してオン
状態におけるサイリスタによる降下電圧は５〜７ボルト
になり、電流が数］、０アンペアもの大電流になると、
損失もサイリスタ１個当り２００〜３００ワット以上に
なる。When controlling the rotation of an AC motor using a 200 volt AC power supply through a thyristor, the voltage drop due to the thyristor in the on state under the control of the thyristor will be 5 to 7 volts, and the current will be as large as several 0 amperes. ,
The loss is also 200 to 300 watts or more per thyristor.
本発明の目的は、オンオフ制御を要しない定常運転時の
電力損失をなくする電源装置を提供することにある。An object of the present invention is to provide a power supply device that eliminates power loss during steady operation without requiring on/off control.
本発明の交流電動機の電源装置は、交流電源入力端子と
、交流電動機を接続するための出力端子と、上記入力端
子と出力端子の間に直列接続されたスイッチング素子と
、そのスイッチング素子に並列接続された電磁開閉接点
と、上記交流電動機の起動時、制動時等の限定された時
間のみ上記スイッチング素子をオンオフ制御するスイッ
チング制御部と、上記スイッチング素子がオン状態にあ
るときに上記電磁開閉接点を開閉させて上記限定された
時間以外をオン又はオフ状態に維持する接点制御部を有
することにより特徴づけられる。The AC motor power supply device of the present invention includes an AC power input terminal, an output terminal for connecting the AC motor, a switching element connected in series between the input terminal and the output terminal, and a switching element connected in parallel to the switching element. a switching control section that controls on/off of the switching element only during a limited time such as when starting or braking the AC motor; It is characterized by having a contact control section that opens and closes and maintains the on or off state outside of the above-mentioned limited time.
次に実施例を説明する。Next, an example will be described.
第１図において、１はディーゼル発電機、２は交流電源
入力端子、３は電源開閉器、４は交流電動機を接続する
ための出力端子、５は三相交流誘導電動機、６はその電
動機により回転駆動さ、れる揚水ポンプ、７はスイッチ
ング素子回路、８は各スイッチング素子と並列接続され
た電磁開閉接点回路、９はスイッチング素子をオンオフ
制御するスイッチング制御部、ＩＯは電磁開閉接点をオ
ンオフ制御する接点制御部である。In Figure 1, 1 is a diesel generator, 2 is an AC power input terminal, 3 is a power switch, 4 is an output terminal for connecting an AC motor, 5 is a three-phase AC induction motor, and 6 is rotated by the motor. 7 is a switching element circuit, 8 is an electromagnetic switching contact circuit connected in parallel with each switching element, 9 is a switching control unit that controls on/off of the switching element, and IO is a contact that controls on/off of the electromagnetic switching contact. This is the control section.
第２図に各部の状態のタイムチートを示す。ディーゼル
発電機１はあらかじめ定常運転状態にある。電源開閉器
がオンに投入されると、スイッチング制御部９がプログ
ラムを開始する。この制御部９は電動機５の消費電流又
は消費電力を検出する検出器１１の測定値と、電源オン
後の所定時間、例えば６０秒間の時間勾配をもつ基準値
を比較して、その偏差によりスイッチング素子７のデユ
ティ比を徐々に上げながらオンオフ制御する。その結果
、電源投入直後の発電機１の負荷電流は急激に増大せず
発電機の衝撃は緩和される。この始動制御プログラムが
終了すると、スイッチング素子７は常時オン状態になり
、同時にプログラム終了信号Ａが接点制御部１０に送ら
れる。接点制御部１０は電源投入時はオフになっており
、このプログラム終了信号Ａによりオンに転する。電磁
開閉接点１０がオンになったのちは電源オフ時までこの
状態が保持され、その間、スイッチング素子７は、オン
状態を保持して接点ｌＯと並列回路を形成してもよく、
また、オフに戻してもよい。Figure 2 shows a time cheat for the status of each part. The diesel generator 1 is in a steady operating state beforehand. When the power switch is turned on, the switching control section 9 starts the program. This control unit 9 compares the measured value of the detector 11 that detects the current consumption or power consumption of the electric motor 5 with a reference value having a time gradient for a predetermined time after the power is turned on, for example, 60 seconds, and performs switching based on the deviation. On/off control is performed while gradually increasing the duty ratio of the element 7. As a result, the load current of the generator 1 immediately after the power is turned on does not increase rapidly, and the impact on the generator is alleviated. When this start control program ends, the switching element 7 is always on, and at the same time a program end signal A is sent to the contact control section 10. The contact control unit 10 is off when the power is turned on, and is turned on by this program end signal A. After the electromagnetic switching contact 10 is turned on, this state is maintained until the power is turned off, and during that time, the switching element 7 may be maintained in the on state to form a parallel circuit with the contact lO,
You may also turn it back off.
本発明のスイッチング素子がオンオフ制御される時間は
、上記した始動制御時のほか、例えば移動物体の停止制
御、変速制御等にも同様に実施することができる。The time during which the switching element of the present invention is controlled to be on/off can be similarly implemented, for example, in stop control of a moving object, speed change control, etc., in addition to the above-mentioned starting control.
本発明によれば、サイリスク等のスイッチング素子が完
全にオン状態になったのちに接点をオフからオンへ、又
はオンからオフへ切換えるので接点にアークが発生せず
接点が長寿命になる。また、サイリスク等のスイッチン
グ素子は限定時間のみの短時間定格で設計すればよいの
で、従来に比べて容量の小さい素子を使用することがで
きる。そして、作動時間の大部分を占める定常運転時に
スイッチング素子による電力損失がなく、発熱防止と省
電力を計ることができる。According to the present invention, since the contact is switched from off to on or from on to off after the switching element such as Cyrisk is completely turned on, arcing does not occur in the contact and the life of the contact is extended. Further, since switching elements such as Cyrisk can be designed with short-time ratings only for a limited time, elements with smaller capacitance can be used than in the past. Furthermore, there is no power loss due to switching elements during steady operation, which occupies most of the operating time, making it possible to prevent heat generation and save power.
、４、図面の簡単な説明
第１図は本発明実施例を示す回路図、第２図はその作用
説明図である。4. Brief Description of the Drawings FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of its operation.
１・・・自家用発電機
２・・・入力端子 ３・・・電源開閉器４・・・出力端
子 ５・・・交流電動機７・・・スイッチング素子回路
８・・・電磁開閉接点回路
９・・・スイッチング制御部
１０・・・接点制御部
１１・・・検出器
特許出願人 株式会社エム・システム技研化 理 人
弁理士 西１） 新1... Private generator 2... Input terminal 3... Power switch 4... Output terminal 5... AC motor 7... Switching element circuit 8... Electromagnetic switching contact circuit 9...・Switching control unit 10...Contact control unit 11...Detector Patent applicant: M-System Gikenka Co., Ltd.
Patent Attorney Nishi 1) Arata
Claims (1)
の出力端子と、上記入力端子と出力端子の間に直列接続
されたスイッチング素子と、そのスイッチング素子に並
列接続された電磁開閉接点と、上記交流電動機の起動時
、制動時等の限定された時間のみ上記スイッチング素子
をオンオフ制御するスイッチング制御部と、上記スイッ
チング素子がオン状態にあるときに上記電磁開閉接点を
開閉させて上記限定された時間以外をオン又はオフ状態
に維持する接点制御部を有する交流電動機の電源装置。 （２）上記スイッチング制御部が、電源オン時から所定
の時間勾配で漸次増大する目標値に対する上記出力端子
における消費電流又は消費電力の測定値の偏差を検出す
る偏差検出器を備え、起動時において交流電源に急激な
負荷がかからないよう構成されていることを特徴とする
特許請求の範囲第１項記載の交流電動機の電源装置。[Claims] +11 AC power input terminal, an output terminal for connecting an AC motor, a switching element connected in series between the input terminal and the output terminal, and an electromagnetic element connected in parallel to the switching element. a switching control unit that controls on/off of the switching element only during a limited time such as when starting or braking the AC motor; and a switching control unit that opens and closes the electromagnetic switching contact when the switching element is in an on state. A power supply device for an AC motor having a contact control section that maintains the ON or OFF state for periods other than the above-mentioned limited time. (2) The switching control unit includes a deviation detector that detects a deviation of the measured value of current consumption or power consumption at the output terminal with respect to a target value that gradually increases at a predetermined time gradient from the time of power-on, and A power supply device for an AC motor according to claim 1, characterized in that the power supply device for an AC motor is configured so that a sudden load is not applied to the AC power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59048485A JPS60194788A (en) | 1984-03-13 | 1984-03-13 | Power source of ac motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59048485A JPS60194788A (en) | 1984-03-13 | 1984-03-13 | Power source of ac motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60194788A true JPS60194788A (en) | 1985-10-03 |
Family
ID=12804683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59048485A Pending JPS60194788A (en) | 1984-03-13 | 1984-03-13 | Power source of ac motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60194788A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0446936A2 (en) * | 1990-03-16 | 1991-09-18 | Allen-Bradley Company, Inc. | Electric motor controller with bypass contactor |
| EP0883232A1 (en) * | 1997-06-05 | 1998-12-09 | Hirohito Sato | Method of and apparatus for starting ac electric motor |
| EP1168590A1 (en) * | 2000-06-28 | 2002-01-02 | Siemens Energy & Automation, Inc. | Automatic sensing of bypassing of soft starter or controller |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51116927A (en) * | 1975-04-04 | 1976-10-14 | Nippon Denso Co Ltd | Chopper controller |
-
1984
- 1984-03-13 JP JP59048485A patent/JPS60194788A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51116927A (en) * | 1975-04-04 | 1976-10-14 | Nippon Denso Co Ltd | Chopper controller |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0446936A2 (en) * | 1990-03-16 | 1991-09-18 | Allen-Bradley Company, Inc. | Electric motor controller with bypass contactor |
| EP0883232A1 (en) * | 1997-06-05 | 1998-12-09 | Hirohito Sato | Method of and apparatus for starting ac electric motor |
| CN1068731C (en) * | 1997-06-05 | 2001-07-18 | 佐藤宏仁 | Method of and apparatus for starting AC electric motor |
| EP1168590A1 (en) * | 2000-06-28 | 2002-01-02 | Siemens Energy & Automation, Inc. | Automatic sensing of bypassing of soft starter or controller |
| US6586905B1 (en) | 2000-06-28 | 2003-07-01 | Siemens Energy & Automation | Automatic sensing of bypassing of soft starter or controller |
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