JPS649423U - - Google Patents

Info

Publication number
JPS649423U
JPS649423U JP10342587U JP10342587U JPS649423U JP S649423 U JPS649423 U JP S649423U JP 10342587 U JP10342587 U JP 10342587U JP 10342587 U JP10342587 U JP 10342587U JP S649423 U JPS649423 U JP S649423U
Authority
JP
Japan
Prior art keywords
circuit
absolute value
synchronous motor
value
inputs
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
JP10342587U
Other languages
English (en)
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 JP10342587U priority Critical patent/JPS649423U/ja
Publication of JPS649423U publication Critical patent/JPS649423U/ja
Pending legal-status Critical Current

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Landscapes

  • Protection Of Generators And Motors (AREA)

Description

【図面の簡単な説明】
第１図はこの考案に係る同期電動機の制御回路
のブロツク図、第２図は第１図に示した回路ブロ
ツクの主要部の波形を示す説明図、第３図は従来
の同期電動機の制御回路のブロツク図を示す。 図において、４はクランプ値設定器、５は電流
指令値クランプ回路、９は電流検出器、１０は同
期電動機、１は過電流保護回路、１２は整流回路
、１３は比較回路、１４は保護警報回路、１６は
絶対値回路を示す。なお、図中、同一符号は同一
又は相当部分を示す。

Claims (1)

    【実用新案登録請求の範囲】
  1. 同期電動機の入力電流の検出電流を整流する整
    流回路と、電流指令値を所定の上限値でクランプ
    する電流指令値クランプ回路の出力信号を入力し
    てその絶対値を出力する絶対値回路と、この絶対
    値回路および上記整流回路の出力信号を入力して
    その大小を比較する比較回路と、この比較回路の
    出力信号により作動する保護警報回路を備えたこ
    とを特徴とする同期電動機の過電流保護回路。
JP10342587U 1987-07-06 1987-07-06 Pending JPS649423U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10342587U JPS649423U (ja) 1987-07-06 1987-07-06

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10342587U JPS649423U (ja) 1987-07-06 1987-07-06

Publications (1)

Publication Number Publication Date
JPS649423U true JPS649423U (ja) 1989-01-19

Family

ID=31334245

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10342587U Pending JPS649423U (ja) 1987-07-06 1987-07-06

Country Status (1)

Country Link
JP (1) JPS649423U (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8648995B2 (en) 1999-12-28 2014-02-11 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display device and manufacturing method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8648995B2 (en) 1999-12-28 2014-02-11 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display device and manufacturing method thereof

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