JPH0295497U

JPH0295497U -

Info

Publication number: JPH0295497U
Application number: JP379389U
Authority: JP
Priority date: 1989-01-17
Filing date: 1989-01-17
Publication date: 1990-07-30

Description

[Brief explanation of drawings]

第１図〜第３図はこの考案の一実施例を示す図
で、第１図は接点信号入力回路の構成を示す接続
図、第２図は第１図に示す接点信号入力回路（接
点３のメーク状態）の等価回路を示す接続図、第
３図は第２図に示す等価回路のベクトル図である
。第４図〜第６図は従来の技術を示す図で、第４
図は接点信号入力回路の構成を示す接続図、第５
図は第４図に示す接点信号入力回路（接点のメー
ク状態）の等価回路を示す接続図、第６図は第５
図に示す等価回路のベクトル図である。図において、１は制御装置、２は交流電源、３
は接点（信号源）、１１は直列抵抗、１２は整流
回路、１３はフオトカプラ、１４は論理回路、１
６は直列リアクトル、１９は等価負荷抵抗、Ｖ〓
は交流電源の電圧（ベクトル）、Ｉ〓は信号入力
回路を流れる電流（ベクトル）、Ｒは直列抵抗の
抵抗値、ｒは等価負荷抵抗の抵抗値、Ｖ〓Ｒは直
列抵抗の両端の電圧（ベクトル）、Ｖ〓ｒは等価
負荷抵抗の両端の電圧（ベクトル）、Ｌは直列リ
アクトルのインダクタンス、Ｖ〓Ｌは直列リアク
トルの両端の電圧（ベクトル）、ωは交流電源の
角速度、Ｐは接点信号入力回路が消費する電力で
ある。なお図中、同一符号は同一、又は相当部分
を示す。 1 to 3 are diagrams showing one embodiment of this invention. FIG. 1 is a connection diagram showing the configuration of a contact signal input circuit, and FIG. 2 is a contact signal input circuit shown in FIG. FIG. 3 is a vector diagram of the equivalent circuit shown in FIG. 2. Figures 4 to 6 are diagrams showing the conventional technology.
The figure is a connection diagram showing the configuration of the contact signal input circuit.
The figure is a connection diagram showing an equivalent circuit of the contact signal input circuit (contact make state) shown in Figure 4, and Figure 6 is a connection diagram showing the equivalent circuit of the contact signal input circuit (contact make state) shown in Figure 4.
FIG. 3 is a vector diagram of the equivalent circuit shown in the figure. In the figure, 1 is a control device, 2 is an AC power supply, and 3
is a contact (signal source), 11 is a series resistor, 12 is a rectifier circuit, 13 is a photocoupler, 14 is a logic circuit, 1
6 is the series reactor, 19 is the equivalent load resistance, V〓
is the voltage (vector) of the AC power supply, I〓 is the current flowing through the signal input circuit (vector), R is the resistance value of the series resistor, r is the resistance value of the equivalent load resistance, V〓R is the voltage across the series resistor ( V〓r is the voltage across the equivalent load resistance (vector), L is the inductance of the series reactor, V〓L is the voltage across the series reactor (vector), ω is the angular velocity of the AC power supply, P is the contact signal This is the power consumed by the input circuit. In the figures, the same reference numerals indicate the same or equivalent parts.

Claims

[Scope of utility model registration request]

A contact that turns on or off depending on the state of the controlled device, one terminal of which is connected to one terminal of the contact, an AC power source, one terminal of which is connected to the other terminal of the AC power source. a rectifier circuit whose one input terminal is connected to the other terminal of the reactor and whose other input terminal is connected to the other terminal of the contact; a positive input terminal connected to the positive output terminal of the rectifier circuit and a negative a photocoupler whose input terminal is connected to the negative output terminal of the rectifier circuit;
and a contact signal input circuit comprising a logic circuit for inputting the output signal of the photocoupler.