JPS60188449U

JPS60188449U - Burnout prevention device

Info

Publication number: JPS60188449U
Application number: JP7658184U
Authority: JP
Inventors: 内野　秀夫; 雅之吉田; 真一川瀬
Original assignee: 三菱電機株式会社
Priority date: 1984-05-25
Filing date: 1984-05-25
Publication date: 1985-12-13

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図は従来のエレベータの制御装置の一実施例のブロ
ック図、第２図はエレベータの制御装置に適用したこの
考案の焼損防止装置の一実施例のロック図、第３図ａは
第２図における充電回路内の抵抗に温度ヒューズを取り
付けた状態を示す正面図、第３図すは第３図ａの側面図
であする。１・・・主電源ノーヒユーズブレーカ、２，９Ａ・・・
コンバータ、３・・・平滑コンデンサ、・４・・・回生
用トランジスタ、５・・・回生抵抗、６・・インバータ
、７・・・誘導電動機、８・・・トランス、９・・・充
電回路、９Ｂ・・・抵抗、１０・・・接触器の接点、１
１・・・温度ヒューズ。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 block diagram of an embodiment of a conventional elevator control device, Fig. 2 is a lock diagram of an embodiment of the burnout prevention device of this invention applied to an elevator control device, and Fig. 3a is a block diagram of an embodiment of a conventional elevator control device. FIG. 3 is a front view showing a state in which a thermal fuse is attached to the resistor in the charging circuit shown in the figure, and FIG. 3 is a side view of FIG. 3a. 1...Main power no fuse breaker, 2,9A...
Converter, 3... Smoothing capacitor, 4... Regeneration transistor, 5... Regeneration resistor, 6... Inverter, 7... Induction motor, 8... Transformer, 9... Charging circuit, 9B...Resistance, 10...Contactor contact, 1
1...Thermal fuse. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

(1) Place the temperature fuse surface in close contact with the surface of the resistor so that it is in series with the resistor on the circuit, and attach the other surface of the temperature fuse so that it is exposed to the air around the resistor to prevent excessive current from flowing through the resistor. A burnout prevention device characterized by cutting off a resistor circuit by blowing a temperature fuse when abnormal heat is generated.

(2) A converter that converts AC to DC, a smoothing capacitor that smoothes the DC output voltage of this converter, an inverter that converts the DC output voltage to variable voltage, variable frequency AC power, and an elevator winding driven by the output of this inverter. a domestic motor; a charging circuit including a resistor for promoting charging of the smoothing capacitor; a circuit connected to the resistor in the charging circuit to cause loss of regenerative current of the motor;
The burnout prevention device according to claim 1, characterized in that the thermal fuse is connected in series with the resistor in the charging circuit and one side of the temperature fuse is in close contact with the surface of the resistor.