CN201887472U

CN201887472U - Electric time-lapse energizing circuit

Info

Publication number: CN201887472U
Application number: CN2010205822156U
Authority: CN
Inventors: 岳国宾; 岳虎国; 张先全
Original assignee: ZHUHAI XINHE ELECTRIC APPLIANCE CO Ltd
Current assignee: ZHUHAI XINHE ELECTRIC APPLIANCE CO Ltd
Priority date: 2010-10-29
Filing date: 2010-10-29
Publication date: 2011-06-29
Anticipated expiration: 2020-10-29

Abstract

The utility model discloses an electric time-lapse energizing circuit comprising a power supply, a signal detection circuit, a first comparison circuit and an RC (remote control) charging circuit, wherein the signal detection circuit and an equipment protection circuit are mutually connected through the first comparison circuit arranged therebetween; and the RC charging circuit consists of a first resistor and a capacitor in series connection, the joint of the first resistor and the capacitor is connected with the input end of the first comparison circuit, the other end of the first resistor is connected to the output end of the signal detection circuit, and the other end of the capacitor is directly grounded. The circuit has a simple structure, and by adopting the RC charging circuit, misoperation of equipment starting can be effectively prevented.

Description

The electronic delay power-on circuit

Technical field

The utility model relates to a kind of time-delay power-on circuit, relates in particular to a kind of electronic delay power-on circuit.

Background technology

Connecting perception or capacitive load, because its electric current that starts moment is often greater than some even be far longer than running current, therefore when starting, because the effect of protective circuit through regular meeting misoperation takes place.For example in the various automatic control equipments of motor frequency conversion actuator and some the medicine equipment automatic control equipments, voltage switch often occurs once closing a floodgate in combined floodgate send the process of electricity and unsuccessfully needs secondary or the just successful phenomenon of repeatedly closing a floodgate, the high electric energy that this phenomenon causes causes very big impact to the segment controller spare in the control appliance, make the lost of life even the damage of control device, and then cause the entire equipment cisco unity malfunction.

Summary of the invention

At the problems referred to above, the utility model provides a kind of circuit structure simple, can effectively prevent the electronic delay power-on circuit of device start misoperation.

The utility model is that the technical scheme that its technical problem of solution is adopted is:

The electronic delay power-on circuit; comprise power supply; signal deteching circuit, first comparison circuit and RC charging circuit; described first comparison circuit is connected between signal deteching circuit and the equipment protection circuit; described RC charging circuit is made up of first resistance and capacitances in series; the junction of described first resistance and electric capacity directly links to each other with the input of described first comparison circuit, and the other end of described first resistance is connected to the output of signal deteching circuit, the direct ground connection of the other end of described electric capacity.

As further improvement of the utility model, described first comparison circuit comprises second comparator, it has positive input, reverse input end and output, the junction of described first resistance and electric capacity directly links to each other with the positive input of second comparator, and the reverse input end of described second comparator is connected to power supply by a pull-up resistor.

As further improvement of the utility model, described signal deteching circuit comprises that first comparator promptly is connected second resistance to its detection effect of input current between the first comparator positive input and the reverse input end.

The beneficial effects of the utility model are: the utility model circuit structure is simple; can effectively prevent the device start misoperation; it is connected the input of equipment protection circuit; starting current by checkout equipment; thereby in the RC charging circuit, produce an of short duration charging process; guarantee that the equipment protection circuit is failure to actuate when starting, and then the normal startup of the equipment of assurance.

Description of drawings

The utility model is described in further detail below in conjunction with the drawings and specific embodiments:

Fig. 1 is the circuit theory diagrams of the utility model embodiment.

Embodiment

With reference to Fig. 1; electronic delay power-on circuit of the present utility model; comprise power supply 1; signal deteching circuit 2, first comparison circuit 3 and RC charging circuit 4; described first comparison circuit 3 is connected between signal deteching circuit 2 and the equipment protection circuit; described RC charging circuit 4 is composed in series by first resistance R 1 and capacitor C 1; the junction A of described first resistance R 1 and capacitor C 1 directly links to each other with the input of described first comparison circuit 3; the other end of described first resistance R 1 is connected to the output of signal deteching circuit 2, the direct ground connection of the other end of described capacitor C 1.

Wherein, above-mentioned first comparison circuit 3 comprises the second comparator U2, it has positive input, reverse input end and output, and the junction A of described first resistance R 1 and capacitor C 1 directly links to each other with the positive input of the second comparator U2, and junction A is also by the first pull down resistor R201 ground connection; The reverse input end of the described second comparator U2 is connected to power supply 1 by a pull-up resistor R100, and described pull-up resistor R100 is connected the plus earth of voltage stabilizing didoe DZ with the junction B of the second comparator U2 reverse input end with the negative electrode of a voltage stabilizing didoe DZ; The output of the described second comparator U2 is connected to the input of equipment protection circuit.

Wherein, above-mentioned signal deteching circuit 2 comprises the first comparator U1 and is connected and between the first comparator U1 positive input and the reverse input end input current played second resistance R 2 of detection effect; Be connected with the 3rd, the 4th resistance R 3, R4 respectively between described first comparator U1 positive input and reverse input end and second resistance R 2, and the junction C of the second comparator U2 positive input and the 3rd resistance R 3 is by the second pull down resistor R202 ground connection, and the junction D of the first comparator U1 reverse input end and the 4th resistance R 4 is by the 3rd pull down resistor R203 ground connection.

The operation principle of this electronic delay power-on circuit is, behind the device start, starting current second resistance R 2 of flowing through, thereby form voltage difference at second resistance R, 2 two ends, this voltage difference is respectively by the 3rd resistance R 3, the 4th resistance R 4 just is being input to the first comparator U1, reverse input end, when this voltage difference surpasses set point, will export a high level voltage signal at the output of the first comparator U1, this high level voltage signal gives capacitor C 1 charging by first resistance R 1, in capacitor C 1 charging process, the second comparator U2 positive input voltage (being the voltage at capacitor C 1 two ends) is less than reverse input end voltage (being the reverse breakdown voltage of voltage stabilizing didoe DZ), so output output low level signal of the second comparator U2, protective circuit is disconnected, as long as guarantee the start-up time of the charging interval of capacitor C 1 greater than equipment, just can guarantee that protective circuit disconnects when device start, prevent misoperations such as shutdown, wherein Chong Dian time parameter can be regulated by the parameter value of second resistance R 2 and capacitor C 1; If equipment breaks down certainly, the time that overcurrent continues, then the output of second comparator U2 output high level signal was connected protective circuit, thereby finishes protection actions such as shutdown or standby greater than the charging interval of capacitor C 1.

More than be that preferable enforcement of the present invention is specified, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite of spirit of the present invention, distortion that these are equal to or replacement all are included in the application's claim institute restricted portion.

Claims

1. electronic delay power-on circuit; comprise power supply (1); it is characterized in that: also comprise signal deteching circuit (2); first comparison circuit (3) and RC charging circuit (4); described first comparison circuit (3) is connected between signal deteching circuit (2) and the equipment protection circuit; described RC charging circuit (4) is composed in series by first resistance (R1) and electric capacity (C1); the junction (A) of described first resistance (R1) and electric capacity (C1) directly links to each other with the input of described first comparison circuit (3); the other end of described first resistance (R1) is connected to the output of signal deteching circuit (2), the direct ground connection of the other end of described electric capacity (C1).

2. electronic delay power-on circuit according to claim 1, it is characterized in that: described first comparison circuit (3) comprises second comparator (U2), it has positive input, reverse input end and output, the junction (A) of described first resistance (R1) and electric capacity (C1) directly links to each other with the positive input of second comparator (U2), and the reverse input end of described second comparator (U2) is connected to power supply (1) by a pull-up resistor (R100).

3. electronic delay power-on circuit according to claim 1 and 2 is characterized in that: described signal deteching circuit (2) comprises first comparator (U1) and is connected second resistance (R2) to its detection effect of input current between first comparator (U1) positive input and the reverse input end.