CN2202377Y

CN2202377Y - Power interface device

Info

Publication number: CN2202377Y
Application number: CN 94237407
Authority: CN
Inventors: 聂恒伟
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-05-19
Filing date: 1994-05-19
Publication date: 1995-06-28
Anticipated expiration: 2004-05-19

Abstract

The utility model relates to a power interface device, comprising a mounting box. The power interface device is characterized in that a working circuit which is composed of a power circuit, an isolating circuit and a main control circuit and is connected between an electronic control circuit composed of CMOS integrated packages and a controlled load to isolate the electronic control circuit from the main control circuit with strong current are directly and electrically separated. The power interface device has the advantages of safety, small size, low cost and long service life and can be widely used in the control of loading work state in strong electric circuit and the automatic control in industrial production.

Description

Power interface device

The utility model relates to a kind of pulse technique modulation conversion device, particularly a kind of power interface mouthpart.

At present, still mostly be control modes such as adopting indirect tentaculum, relay in light current control forceful electric power device, volume is big, the cost height, and useful life is short.

The purpose of this utility model is in order to overcome above-mentioned weak point, and a kind of volume is little, cost is low, long service life and provide, and applies to by the power interface mouthpart in the electronic circuit control forceful electric power device.

Power interface mouthpart of the present utility model is connected between the electronic control circuit of being made up of the CMOS integrated package and controlled load, comprises mounting box, and its operating circuit is made up of power circuit, buffer circuit and governor circuit.

Fig. 1 is the utility model structure chart;

Fig. 2 is embodiment 1 circuit diagram;

Fig. 3 is embodiment 1 printed circuit board figure;

Fig. 4 is embodiment 2 circuit diagrams;

Fig. 5 is embodiment 2 printed circuit board figure.

Now illustrated embodiment is made detailed description to the utility model in conjunction with the accompanying drawings.

Embodiment 1: among Fig. 2, by transformer T, rectifier diode VD ₁～VD ₄, filtering capacitor C ₁Be connected into bridge rectifier filter power supply circuit; In the buffer circuit, resistance R ₁, R ₂Output head anode one end and contact connection power circuit, R ₁The other end connect crystal diode VD ₅, VD ₆Positive pole, VD ₅Negative pole is a signal input end, VD ₆Negative pole, R ₂The other end connects transistor VT respectively ₁Base stage, collector electrode, VT ₁Emitter connects crystal diode VD ₇And VD ₈, VD ₉, VD ₁₀The positive pole of series arm, VD ₁₀Negative pole connects the bidirectional triode thyristor VS of governor circuit ₁One main electrode is the tie point of the zero line in load alternating current source, power circuit output end negative pole, another input of control signal, VD ₇Negative pole connects VS ₁The control utmost point, VS ₁Another main electrode is the load tie point.

Each electronic component by welding shown in Figure 3 good after, printed circuit board is fixed in the mounting box, power supply, control signal binding post stretch out outside the box.During use, behind controlled load serial connection mains switch, an end connects VS ₁The load tie point, the other end connects AC power live wire, VS ₁The zero line tie point connect the AC power zero line, the control signal of the electronic control circuit of being made up of the CMOS integrated package is by VD ₅, VD ₁₀The negative pole input can be passed through the modulation conversion effect of this power interface mouthpart by the level variable signal of electronic circuit output, the operating state of Control work load in the forceful electric power road.

Embodiment 2: as shown in Figure 4, compare with Fig. 2, just at VT ₁Emitter and VD ₇Having increased between the positive pole with photoelectrical coupler G is the electrical isolation level of core, and remaining circuit is the same.VT wherein ₁Emitter connects the light-emitting diode positive pole of photoelectrical coupler G, and the light-emitting diode negative pole connects crystal diode VD ₁₄Positive pole, VD ₁₄Negative pole connects the negative pole of output end of power circuit, and the transistor collector of photoelectrical coupler G, emitter connect resistance R respectively ₃, R ₄Series arm and transistor VT ₂Base stage, R ₄The other end connects VT ₂Collector electrode, VT ₂Emitter connects VD ₇With crystal diode VD ₁₁, VD ₁₂, VD ₁₃The positive pole of series arm, VD ₁₃Negative pole connects VS ₁One main electrode, R ₃, R ₄Tie point and VD ₁₃Negative pole connects the positive and negative electrode that is equipped with DC power supply in addition respectively.Present embodiment is owing to increased one-level electrical isolation level, governor circuit VS ₁Output can be regardless of fire when connecting the load alternating current source, zero line connects arbitrarily.

The utility model is owing to adopt above design, with electronic control circuit and the directly isolation of being electrically connected property of forceful electric power governor circuit, safe and reliable, volume is little, cost is low, long service life can be widely used in the control of loaded work piece state in the forceful electric power road, the automatic control in the industrial production etc.

Claims

1, a kind of power interface mouthpart comprises mounting box, it is characterized in that its operating circuit is made up of power circuit, buffer circuit and governor circuit, by transformer T, rectifier diode VD ₁～VD ₄, filtering capacitor C ₁Be connected into bridge rectifier filter power supply circuit, in the buffer circuit, resistance R ₁, R ₂Output head anode one end and contact connection power circuit, R ₁The other end connect crystal diode VD ₅, VD ₆Positive pole, VD ₅Negative pole is a signal input end, VD ₆Negative pole, R ₂The other end connects transistor VT respectively ₁Base stage, collector electrode, VT ₁Emitter connects crystal diode VD ₇And VD ₈, VD ₉, VD ₁₀The positive pole of series arm, VD ₁₀Negative pole connects the bidirectional triode thyristor VS of governor circuit ₁One main electrode is the tie point of the zero line in load alternating current source, power circuit output end negative pole, another input of control signal, VD ₇Negative pole connects VS ₁The control utmost point, VS ₁Another main electrode is the load tie point, after each electronic component welds, printed circuit board is fixed in the mounting box, and power supply, control signal binding post stretch out outside the box.

2, power interface mouthpart as claimed in claim 1 is characterized in that at VT ₁Emitter and VD ₇Can increase between the positive pole with photoelectrical coupler G is the electrical isolation level of core, wherein VT ₁Emitter connects the light-emitting diode positive pole of photoelectrical coupler G, and the light-emitting diode negative pole connects crystal diode VD ₁₄Positive pole, VD ₁₄Negative pole connects the negative pole of output end of power circuit, and the transistor collector of photoelectrical coupler G, emitter connect resistance R respectively ₃, R ₄Series arm and transistor VT ₂Base stage, R ₄The other end connects VT ₂Collector electrode, VT ₂Emitter connects VD ₇With crystal diode VD ₁₁, VD ₁₂, VD ₁₃The positive pole of series arm, VD ₁₃Negative pole connects VS ₁One main electrode, R ₃, R ₄Tie point and VD ₁₃Negative pole connects the positive and negative electrode that is equipped with DC power supply in addition respectively.