JPS62233025A - Changeover of driving source - Google Patents
Changeover of driving sourceInfo
- Publication number
- JPS62233025A JPS62233025A JP61075419A JP7541986A JPS62233025A JP S62233025 A JPS62233025 A JP S62233025A JP 61075419 A JP61075419 A JP 61075419A JP 7541986 A JP7541986 A JP 7541986A JP S62233025 A JPS62233025 A JP S62233025A
- Authority
- JP
- Japan
- Prior art keywords
- power source
- inverter
- motor
- commercial power
- switching
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 claims description 14
- 230000000694 effects Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の目的〕
（Ｒ，梁上の利用分野）
本発明は交流電動機の駆動電源をインバータ電源から商
用？Ｉｔ源に円滑に切換える駆動電源の切換方法に関す
るものである。[Detailed description of the invention] [Object of the invention] (Field of application on R, beam) Is the present invention capable of converting AC motor drive power from an inverter power supply? The present invention relates to a method of switching a drive power source to smoothly switch to an It source.
（従来の技術）
従来、交流電動機のインバータ駆動システムでプロセス
の要求する出力が急増したときや、インバータが故障し
たときにプロセスの必要とする出力を補うときには、下
記の方法が用いられている。(Prior Art) Conventionally, in an AC motor inverter drive system, the following method has been used to supplement the output required by the process when the output required by the process increases rapidly or when the inverter breaks down.
■ インバータが商用電源切換装置を持っていない場合
：
プロセスの要求する出力が増加したときは、インバータ
によって電動機を加速して出力を増加する。インバータ
故障のときは、運転継続不可となる。■ If the inverter does not have a commercial power switching device: When the output required by the process increases, the inverter accelerates the motor to increase the output. If the inverter fails, operation cannot continue.
■ インバータは商用電源切換装置を持っているが、商
用電源との同期切換装置がない場合：インバータを切離
し、電動機の残留電圧が十分低くなってから商用電源に
接続して加速する。■ If the inverter has a commercial power switching device, but there is no synchronized switching device with the commercial power source: Disconnect the inverter and wait until the residual voltage of the motor is low enough before connecting it to the commercial power source and accelerating.
■ インバータが商用電源切換装置を持っており、かつ
商用電源との同期切換装置がある場合：プロセスの要求
する出力が増加したときは、インバータの出力周波数を
商用周波数まで上昇させ、電動機が加速し終った後、商
用電源へ同期併入を行う。インバータ故障時は上記０項
と同じ手順となる。■ If the inverter has a commercial power switching device and a synchronous switching device with the commercial power source: When the output required by the process increases, the inverter's output frequency is increased to the commercial frequency, and the motor accelerates. After finishing, synchronously connect to the commercial power source. When the inverter fails, the procedure is the same as in item 0 above.
しかしながら上記■、■、■の方法では、インバータ駆
動されている？！！＃機の出力をプロセスが要求する出
力まで立上げるのに時間がかかり、特に低速域で運転し
ているときに長い時間を要し、緊急時のシステムの信頼
性を低下させるという問題がある。However, in the methods of ■, ■, and ■ above, are they driven by an inverter? ! ! # It takes time to ramp up the output of the machine to the output required by the process, especially when operating in a low speed range, and there is a problem that it reduces the reliability of the system in an emergency.
（発明が解決しようとする問題点）
本発明は、商用電源への切換時に一時的に直流リアクト
ルを挿入し、これによって交流電動機の駆動をインバー
タ電源から商用電源に短時間にかつ円滑に切換える駆動
電源の切換方法を提供することを目的としている。(Problems to be Solved by the Invention) The present invention provides a drive system that temporarily inserts a DC reactor when switching to a commercial power source, thereby smoothly switching the drive of an AC motor from an inverter power source to a commercial power source in a short time. The purpose is to provide a method for switching power supplies.
（問題点を解決するための手段と作用）本発明は、交流
電動機の駆動をインバータ電源から商用電源に切換える
駆動電源の切換方法において、上記交流電動機をインバ
ータ電源から切離して商用電源に接続するとき、交流電
動機の残留電圧による突入電流を抑制する直列リアクト
ルを一時的に挿入し、これによって商用電源による電動
機の加速を円滑かつ急速に行えるようにしたものである
。(Means and effects for solving the problems) The present invention provides a drive power source switching method for switching the drive of an AC motor from an inverter power source to a commercial power source, when the AC motor is disconnected from the inverter power source and connected to the commercial power source. A series reactor is temporarily inserted to suppress inrush current due to residual voltage in the AC motor, thereby allowing the motor to be smoothly and rapidly accelerated by the commercial power source.
（実施例） 本発明の一実施例を図面に示す。(Example) An embodiment of the invention is shown in the drawings.
図面において、交流電源は受電開閉器２を介して商用電
源１から供給され、交流電動機３と機械製ｖ１４から成
る負荷機械系５は、常時はインバータ６によって可変速
駆動され、負荷が急増したとき、またはインバータ６が
故障したときは、インバータ６から切離され、商用電源
１に接続されて商用電源１から直接に駆動される。In the drawing, AC power is supplied from a commercial power supply 1 via a power receiving switch 2, and a load mechanical system 5 consisting of an AC motor 3 and a mechanical V14 is normally driven at variable speed by an inverter 6, and when the load suddenly increases. , or when the inverter 6 fails, it is disconnected from the inverter 6, connected to the commercial power source 1, and driven directly from the commercial power source 1.
すなおち先ず切換指令信号によってインバータ６を停止
すると共に開閉器７．８を開略し、同時に開閉器９を閉
路して直列リアクトル１０を介して交流電動機３を商用
電源に接続する。That is, first, the inverter 6 is stopped by the switching command signal, the switch 7.8 is opened, and at the same time, the switch 9 is closed to connect the AC motor 3 to the commercial power source via the series reactor 10.
これによって電動機３の残留電圧による突入電流や過ト
ルクは直列リアクトル１０によって抑制され、 １ｔ１
ＦＩＪ４１３４＊ＰＨｆＨＪＯ速すｈル。As a result, inrush current and overtorque due to residual voltage of the electric motor 3 are suppressed by the series reactor 10, and 1t1
FIJ4134*PHfHJO speed.
次に、予め設定した一定時間後に開閉器１１を開路する
と共に開閉器９を開路すると、電＠機３には商用電源が
直接に印加されて急速に加速を行い、商用電源への切換
えが完了する。Next, when the switch 11 is opened and the switch 9 is opened after a preset period of time, commercial power is directly applied to the electric @ machine 3 and it accelerates rapidly, completing the switch to commercial power. do.
これによってインバータ電源から商用電源への切換が円
滑かつ急速に行われる。This allows smooth and rapid switching from the inverter power source to the commercial power source.
以上説明したように本発明によれば、交流電動機の駆動
電源をインバータ電源から商用電源に切換えるとき、一
時的に直列リアクトルを挿入しているので、電動機残留
電圧による突入電流や異常トルクが抑制され、円滑で急
速な商用電源への切換が可能となり、従ってプロセスの
要求する出方が増大したときゃ、インバータが故障した
ときにも、円滑に商用電源に切換えて所要の負荷まで急
速に加速することが可能となり、システムの能率と信頼
性を向上するのに極めて有効である。As explained above, according to the present invention, when switching the drive power source of an AC motor from an inverter power source to a commercial power source, a series reactor is temporarily inserted, so that inrush current and abnormal torque due to residual voltage of the motor are suppressed. Therefore, when the output required by the process increases, even if the inverter fails, it is possible to smoothly switch to commercial power and quickly accelerate to the required load. This is extremely effective in improving system efficiency and reliability.
図面は本発明の一実施例を示す系統図である。 The drawing is a system diagram showing one embodiment of the present invention.
Claims (1)
換える駆動電源の切換方法において、上記交流電動機を
インバータ電源から切離して商用電源に接続するとき、
交流電動機の残留電圧による突入電流を抑制する直列リ
アクトルを一時的に挿入することを特徴とする駆動電源
の切換方法。In a drive power switching method for switching the drive of an AC motor from an inverter power source to a commercial power source, when the AC motor is disconnected from the inverter power source and connected to the commercial power source,
A drive power supply switching method characterized by temporarily inserting a series reactor to suppress inrush current due to residual voltage of an AC motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61075419A JPH07110108B2 (en) | 1986-04-03 | 1986-04-03 | Driving power supply switching method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61075419A JPH07110108B2 (en) | 1986-04-03 | 1986-04-03 | Driving power supply switching method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62233025A true JPS62233025A (en) | 1987-10-13 |
| JPH07110108B2 JPH07110108B2 (en) | 1995-11-22 |
Family
ID=13575647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61075419A Expired - Fee Related JPH07110108B2 (en) | 1986-04-03 | 1986-04-03 | Driving power supply switching method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07110108B2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5883591A (en) * | 1981-11-07 | 1983-05-19 | Toshiba Corp | Braking method for induction motor |
| JPS58112035U (en) * | 1982-01-25 | 1983-07-30 | 三菱電機株式会社 | Induction motor power switching circuit |
| JPS611293A (en) * | 1984-06-13 | 1986-01-07 | Toshiba Corp | Inverter operating method for motor |
| JPS6192115A (en) * | 1984-10-09 | 1986-05-10 | 三菱電機株式会社 | Power-supply changeover circuit for inverter |
-
1986
- 1986-04-03 JP JP61075419A patent/JPH07110108B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5883591A (en) * | 1981-11-07 | 1983-05-19 | Toshiba Corp | Braking method for induction motor |
| JPS58112035U (en) * | 1982-01-25 | 1983-07-30 | 三菱電機株式会社 | Induction motor power switching circuit |
| JPS611293A (en) * | 1984-06-13 | 1986-01-07 | Toshiba Corp | Inverter operating method for motor |
| JPS6192115A (en) * | 1984-10-09 | 1986-05-10 | 三菱電機株式会社 | Power-supply changeover circuit for inverter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07110108B2 (en) | 1995-11-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |