JPS6152500U

JPS6152500U -

Info

Publication number: JPS6152500U
Application number: JP1985103003U
Authority: JP
Priority date: 1985-07-04
Filing date: 1985-07-04
Publication date: 1986-04-09

Description

[Brief explanation of the drawing]

第１図は従来の静止セルビウス装置を示すブロ
ツク図、第２図は第１図の静止セルビウス装置の
速度制御装置における誘導電動機の２次電圧と回
転数の関係を示す図、第３図はこの考案の静止セ
ルビウス装置の速度制御装置の一実施例を示すブ
ロツク図、第４図は第３図の静止セルビウス装置
の速度制御装置におけるコンバータにかかる電圧
と回転数の関係を示す図、第５図は同じく第３図
の静止セルビウス装置の速度制御装置におけるコ
ンガータとインバータに流れる電流と回転数を示
す図、第６図はこの考案の静止セルビウス装置の
速度制御装置の他の実施例を示すブロツク図であ
る。第７図は２乗トルク負荷における誘導電動機
の２次電流を示す図である。１…誘導電動機、２，７…コンバータ、３…直
流リサクトル、４…インバータ、５…逆変換用変
圧器、６…降圧用トランス。なお、図中同一符号
は同一または相当部分を示す。 Figure 1 is a block diagram showing a conventional stationary Servian device, Figure 2 is a diagram showing the relationship between the secondary voltage and rotational speed of the induction motor in the speed control device of the stationary Servian device shown in Figure 1, and Figure 3 is a diagram showing the relationship between the secondary voltage and rotation speed of the induction motor in the speed control device of the stationary Servian device shown in Figure 1. FIG. 4 is a block diagram showing an embodiment of the speed control device for the stationary Servius device of the invention, and FIG. 3 is a diagram showing the current flowing through the congater and the inverter and the rotational speed in the speed control device for the stationary Servius device shown in FIG. 3, and FIG. 6 is a block diagram showing another embodiment of the speed control device for the stationary Servius device of this invention. It is. FIG. 7 is a diagram showing the secondary current of the induction motor under a square torque load. 1... Induction motor, 2, 7... Converter, 3... DC reductor, 4... Inverter, 5... Inverse conversion transformer, 6... Step-down transformer. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims

[Claims for Utility Model Registration] (1) A first converter consisting of a control electric valve that converts the secondary power of the induction motor into direct current, a step-down transformer that steps down the secondary power, and a step-down transformer for this step-down transformer. A second converter converts secondary power into direct current, and an inverter converts the outputs of the first and second converters into alternating current and recovers it to the power supply side of the induction motor. When the induction motor rotates at high speed in response to a torque load, the second converter is deactivated and the first converter is activated, and when the induction motor rotates at low speed, the first converter is deactivated and the second converter is activated. A speed control device for a stationary Servius device, characterized in that the first converter is switched to operate, and this switching is performed by turning on and off the first converter itself. (2) The speed control device for a stationary Servius device according to claim 1, wherein the first and second converters and inverters each include two or more.