JPS6192193U - - Google Patents

Info

Publication number
JPS6192193U
JPS6192193U JP17674484U JP17674484U JPS6192193U JP S6192193 U JPS6192193 U JP S6192193U JP 17674484 U JP17674484 U JP 17674484U JP 17674484 U JP17674484 U JP 17674484U JP S6192193 U JPS6192193 U JP S6192193U
Authority
JP
Japan
Prior art keywords
voltage
inverter
voltage drop
link bus
ratio
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
Application number
JP17674484U
Other languages
Japanese (ja)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP17674484U priority Critical patent/JPS6192193U/ja
Publication of JPS6192193U publication Critical patent/JPS6192193U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Protection Of Static Devices (AREA)
  • Control Of Ac Motors In General (AREA)
  • Control Of Multiple Motors (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の一実施例を示す回路図、第２
図は従来のインバータ群の一例を示す回路図、第
３図は従来の瞬時停電保護装置の一例を示す回路
図である。 １…交流電源、２…コンバータ、３…コンデン
サ、４…インバータ、５…交流電動機、６…制御
回路、７…設定器、８…位相検出器、９…信号切
換器、１０…瞬停検出回路、１１…電圧検出回路
、１２…比較器、１３…メモリ回路、１４…電圧
低下検出回路、１５…乗算器。 Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a circuit diagram showing an example of a conventional inverter group, and FIG. 3 is a circuit diagram showing an example of a conventional instantaneous power failure protection device. DESCRIPTION OF SYMBOLS 1... AC power supply, 2... Converter, 3... Capacitor, 4... Inverter, 5... AC motor, 6... Control circuit, 7... Setting device, 8... Phase detector, 9... Signal switch, 10... Momentary power failure detection circuit , 11... Voltage detection circuit, 12... Comparator, 13... Memory circuit, 14... Voltage drop detection circuit, 15... Multiplier.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 交流電源をコンバータを介して直流電圧に変換
した直流リンク母線に複数のインバータを並列接
続し、それぞれのインバータに交流電動機を接続
して所定の速度比で可変速運転するインバータ群
を交流電源の瞬時停電による異常運転から保護す
るインバータ群の瞬時停電保護装置において、上
記直流リンク母線の瞬時電圧低下を検出する電圧
検出回路と、上記瞬時電圧低下を検出したとき上
記電圧低下の前と後の直流リンク母線の電圧比を
算出する比較器と、上記算出した電圧比に応じて
各インバータの設定値を変更するそれぞれの乗算
器を備えたことを特徴とするインバータ群の瞬時
停電保護装置。 Multiple inverters are connected in parallel to a DC link bus bar that converts AC power to DC voltage via a converter, and an AC motor is connected to each inverter to operate the inverter group at variable speed at a predetermined speed ratio. A momentary power failure protection device for an inverter group that protects from abnormal operation due to a power outage includes a voltage detection circuit that detects an instantaneous voltage drop on the DC link bus, and a voltage detection circuit that detects an instantaneous voltage drop on the DC link bus before and after the voltage drop when the instantaneous voltage drop is detected. 1. A momentary power outage protection device for an inverter group, comprising a comparator that calculates the voltage ratio of the busbar, and a multiplier that changes the set value of each inverter according to the calculated voltage ratio.
JP17674484U 1984-11-22 1984-11-22 Pending JPS6192193U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17674484U JPS6192193U (en) 1984-11-22 1984-11-22

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17674484U JPS6192193U (en) 1984-11-22 1984-11-22

Publications (1)

Publication Number Publication Date
JPS6192193U true JPS6192193U (en) 1986-06-14

Family

ID=30734337

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17674484U Pending JPS6192193U (en) 1984-11-22 1984-11-22

Country Status (1)

Country Link
JP (1) JPS6192193U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001082466A1 (en) * 2000-04-21 2001-11-01 Ebara Corporation Magnetic bearing controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001082466A1 (en) * 2000-04-21 2001-11-01 Ebara Corporation Magnetic bearing controller

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