JPS5918593U

JPS5918593U - Motor overcurrent detection device

Info

Publication number: JPS5918593U
Application number: JP1983088760U
Authority: JP
Inventors: 香田　稔; 細川　芳輝
Original assignee: 松下電器産業株式会社
Priority date: 1983-06-09
Filing date: 1983-06-09
Publication date: 1984-02-04

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

[Brief explanation of drawings]

第１図は本考案の一実施例の構造概略図、第２図は第１
図の要部平面図、第３図は本考案の実施例におけるモー
タ駆動回路、第４図は第３図の特性を示す特性図、第５
図は本考案の一実施例における電流検出回路の結線図、
第６図は電流検出回路の他の実施例を示す結線図である
。３．３ａ、３ｂ、３Ｃ・・・主巻線、６・・・・・・ロ
ータ、１０−−−−−−位置検出口−タ、１１ａ、　　
１　ｌｂ、　　１　ｌｃ・・・・・・１次コイル、１２
ａ、　　１２ｂ、　　１２Ｃ・・・・・・２次コイル、
１４ａ、　　１４ｂ、　　１４Ｃ・・・・・・整流回路
、１５ａ、１５ｂ、１５Ｃ・・・・・・電流切換トラン
ジスタ、２４・・・・・・検出抵抗、２９・・・・・・
電流制限トランジスタ、３０・・・・・・電流制限検出
トランジスタ、４２゜４３・・・・・・トランジスタ、
５３・・・・・・双安定マルチバイブレータ。Fig. 1 is a structural schematic diagram of one embodiment of the present invention, and Fig. 2 is a structural diagram of an embodiment of the present invention.
3 is a plan view of the main part of the figure, FIG. 3 is a motor drive circuit in an embodiment of the present invention, FIG. 4 is a characteristic diagram showing the characteristics of FIG. 3, and FIG.
The figure is a wiring diagram of a current detection circuit in an embodiment of the present invention.
FIG. 6 is a wiring diagram showing another embodiment of the current detection circuit. 3.3a, 3b, 3C...Main winding, 6...Rotor, 10---Position detection port, 11a,
1 lb, 1 lc...Primary coil, 12
a, 12b, 12C... Secondary coil,
14a, 14b, 14C... Rectifier circuit, 15a, 15b, 15C... Current switching transistor, 24... Detection resistor, 29...
Current limit transistor, 30...Current limit detection transistor, 42°43...Transistor,
53... Bistable multivibrator.

Claims

[Scope of utility model registration request]

A current detection circuit that detects the current flowing through the main winding as a voltage change, and a position detection signal that switches the current flowing through the main winding according to the detection level when the current detection circuit exceeds the detection level. a current limiting circuit that limits the current flowing to the main winding by a current limiting transistor that changes the bias voltage of the bias voltage source; and a current limiting circuit that takes out the current flowing between the current limiting transistor and the bias voltage source in the form of a constant current. A current circuit, a charging circuit that charges a capacitor with the output of the constant current circuit, and a voltage detection means whose output state is reversed when the charging voltage of the charging circuit reaches a specified voltage, the voltage detection means described above. An overcurrent detection device for a motor, characterized in that the time during which the current in the main winding is restricted is detected based on the output.