JPS5811995U

JPS5811995U - Starting device for capacitor start induction motor

Info

Publication number: JPS5811995U
Application number: JP10455881U
Authority: JP
Inventors: 久保　良彦
Original assignee: 三菱電機株式会社
Priority date: 1981-07-14
Filing date: 1981-07-14
Publication date: 1983-01-25

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 the drawing]

第１図は従来のコンデンサ始動単相誘導電動機の始動装
置の回路図、第２図ａないし第２図Ｃはそれぞれ第１図
のコンデンサ始動単相誘導電動機の始動装置の動作を説
明するための各部の波形図、第３図は第１図のコンデン
サ始動単相誘導電動機の始動装置において電源スィッチ
しゃ断時のコンデンサ制動電流が流れる原因を示す図、
第４図はこの考案のコンデンサ始動誘導電動機の始動装
置の一実施例の要部を取り出して示す回路図である。１・・・単相電源、２・・・電源スィッチ、３・・・回
転子、４・・・主巻線、５・・・始動巻線、６・・・ス
リ；ント板、７・・・ダイオード、８．１２・・・コン
デンサ、９・・・ゼナーダイオード、１０・・・ホトカ
プラ、１１ａ。１１ｂ・・・アンプ、１４・・・第１の半導体スイッチ
、１５・・・第２の半導体スイッチ、１６・・・整流器
、１７・・・主回路用半導体スイッチ、１８・・・始動
コンデンサ、１９・・・制御電源電圧検知素子。なお、
図中同一符号は同一または相当部分を示す。FIG. 1 is a circuit diagram of a conventional starting device for a capacitor-started single-phase induction motor, and FIGS. Waveform diagrams of each part, Figure 3 is a diagram showing the cause of the capacitor braking current flowing when the power switch is cut off in the starting device of the capacitor-started single-phase induction motor shown in Figure 1,
FIG. 4 is a circuit diagram showing essential parts of an embodiment of the starting device for a capacitor-started induction motor of this invention. DESCRIPTION OF SYMBOLS 1...Single phase power supply, 2...Power switch, 3...Rotor, 4...Main winding, 5...Starting winding, 6...Sli;nt board, 7... - Diode, 8.12... Capacitor, 9... Zener diode, 10... Photocoupler, 11a. 11b... Amplifier, 14... First semiconductor switch, 15... Second semiconductor switch, 16... Rectifier, 17... Main circuit semiconductor switch, 18... Starting capacitor, 19 ...Control power supply voltage detection element. In addition,
The same reference numerals in the figures indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

An induction motor having a main winding connected to a power source via a power switch, a starting winding connected to a power source via a starting capacitor, a semiconductor switch for the main circuit, and the power switch, and a rotor for rotating a slit plate. , a first semiconductor switch that becomes conductive when the control power supply voltage corresponding to the rotational speed of the slit plate becomes equal to or higher than a predetermined value;弗2 semiconductor switch that controls the switch,
A capacitor starting induction comprising a control power supply voltage detection element that turns off a second semiconductor switch regardless of the state of the first semiconductor switch when the power supply switch is cut off and the control power supply voltage becomes below a predetermined value. Electric motor starting device.