CN202633173U - Relay control circuit - Google Patents
Relay control circuit Download PDFInfo
- Publication number
- CN202633173U CN202633173U CN 201220282815 CN201220282815U CN202633173U CN 202633173 U CN202633173 U CN 202633173U CN 201220282815 CN201220282815 CN 201220282815 CN 201220282815 U CN201220282815 U CN 201220282815U CN 202633173 U CN202633173 U CN 202633173U
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- Prior art keywords
- relay
- switch
- magnetic latching
- mcu
- coil
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- Expired - Lifetime
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Abstract
The utility model relates to the field of relay control, and particularly to a control circuit aiming at solving the problem in the prior art and utilizing a magnetic latching relay to achieve a replay delaying function. By means of a microprogrammed control unit (MCU), two ports can respectively send out pulse signals to drive a first triode VT1 and a second triode VT2 to enable a set coil and a reset coil of the magnetic latching relay to be connected, so that the connection and disconnection of the magnetic latching relay are controlled. The relay control circuit is mainly applied to the field of relay control.
Description
Technical field
The utility model relates to relay control field, especially a kind of control circuit that utilizes magnetic latching relay to realize the time-delay relay function.
Background technology
Power-off delay relay needs the action again after the delay adjustments time arrives of output relay contact (to annotate: because might delay time disconnection in mode of operation; Also possible timing closing); At present; To need bigger energy-storage travelling wave tube to guarantee after outage, to supply with the enough energy of relay through the common electrical magnetic relay, and make the armature of relay keep attracting state, therefore make that the deisgn product volume is bigger; Because common electromagnetic relay coil will produce enough big magnetic field force holding armature adhesive, this need consume very big electric energy.
The utility model content
The utility model technical problem to be solved is: to the problem of above-mentioned existence; A kind of control circuit that utilizes magnetic latching relay to realize the time-delay relay function is provided; Wherein pulse signal be can send respectively and first triode, second triode controlled through two ports of MCU; Reach work, control the disconnection or the closure of magnetic latching relay with this to magnetic latching relay set coil, resetting coil.Only need MCU to send pulse among the design and trigger, under hold mode, do not consume any energy fully, make small product size also reduce.
For achieving the above object, the technical scheme that the utility model adopts is:
A kind of control relay circuit; Comprise MCU; Diode, electric capacity, first switch, second switch, relay, power end; Said power end is connected with relay set coil anode, relay resetting coil anode, capacitance cathode respectively through diode; Said electric capacity negative pole, the first switch emitter, second switch emitter altogether, relay set coil negative terminal, relay resetting coil negative terminal are connected with the first switch collector electrode, second switch collector electrode respectively, the first switch base stage, second switch base stage are connected with two ports of MCU respectively.
Said relay is a magnetic latching relay.
Said first switch, second switch are respectively triodes.
Can find out that from the architectural feature of above-mentioned the utility model its advantage is
(1) the control magnetic latching relay only need send that simple pulse signal drives the first triode VT1, the second triode VT2 realizes through MCU in the utility model; And magnetic latching relay consumed power not fully under hold mode, reduce design cost;
(2) the utility model is controlled the first triode VT1, the second triode VT2 through MCU the pulse signal of MCU output is expanded the pulse signal that stream provides the moment adhesive of driven magnetic latching relay to need.
(3) the utility model is owing to adopted magnetic latching relay to make the energy-storage travelling wave tube volume of product also reduce.
(4) diode D is in order to prevent current reflux; Process is: after power end is accomplished the capacitor C charging; The stored electric energy of capacitor C just can only discharge through the magnetic latching relay coil; Power end VDD makes its energy of other components consume and can not reflux, because can become 0 after the power down.
Description of drawings
The utility model will explain through example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the schematic diagram of the utility model.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
A kind of control relay circuit; Comprise MCU; Diode D, capacitor C, the first switch VT1, second switch VT2, relay, power end VDD; Said power end VDD is connected with relay set coil anode J1+, relay resetting coil anode J2+, capacitor C positive pole respectively through diode D; Said capacitor C negative pole, the first switch VT1 emitter, second switch VT2 emitter altogether, relay set coil negative terminal J1-, relay resetting coil negative terminal J2-are connected with the first switch VT1 collector electrode, second switch VT2 collector electrode respectively, the first switch VT1 base stage, second switch VT2 base stage are connected with two ports of MCU respectively.Its repeat circuit is a magnetic latching relay.The first switch VT1, second switch VT2 can be respectively triodes.
The utility model course of work is:
Power end VDD makes relay set coil anode J1+, capacitor C positive pole keep forward voltage through diode D; MCU sends pulse signal through its I/O port and gives the first switch VT1 (triode; FMMT5551 for example) base stage; This moment first switch VT1 emitter and first switch VT1 collector electrode conducting utilizes the switching characteristic of the first switch VT1, makes win the switch VT1 collector electrode and the emitter conducting driving actuating of relay.
The driven course of work of relay resetting coil J2 is identical with set coil J1.Notice that wherein (1) avoids set coil J1, two coils of resetting coil J2 to switch on simultaneously.When (2) adopting the MCU pulsed drive, pulse duration should be greater than 50 milliseconds.(3) resetting coil voltage must not surpass 150% of rated voltage, otherwise might burn coil.
Disclosed all characteristics in this specification except mutually exclusive characteristic, all can make up by any way.
Disclosed arbitrary characteristic in this specification (comprising any accessory claim, summary and accompanying drawing) is only if special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, only if special narration, each characteristic is an example in a series of equivalences or the similar characteristics.
Claims (3)
1. control relay circuit; It is characterized in that comprising MCU; Diode, electric capacity, first switch, second switch, relay, power end; Said power end is connected with relay set coil anode, relay resetting coil anode, capacitance cathode respectively through diode; Said electric capacity negative pole, the first switch emitter, second switch emitter altogether, relay set coil negative terminal, relay resetting coil negative terminal are connected with the first switch collector electrode, second switch collector electrode respectively, the first switch base stage, second switch base stage are connected with two ports of MCU respectively.
2. a kind of control relay circuit according to claim 1 is characterized in that said relay is a magnetic latching relay.
3. a kind of control relay circuit according to claim 1 is characterized in that said first switch, second switch are respectively triodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220282815 CN202633173U (en) | 2012-06-15 | 2012-06-15 | Relay control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220282815 CN202633173U (en) | 2012-06-15 | 2012-06-15 | Relay control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202633173U true CN202633173U (en) | 2012-12-26 |
Family
ID=47386334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220282815 Expired - Lifetime CN202633173U (en) | 2012-06-15 | 2012-06-15 | Relay control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202633173U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110706954A (en) * | 2019-09-12 | 2020-01-17 | 恒大智慧充电科技有限公司 | Emergency stop switch circuit and emergency stop and reset method of emergency stop switch |
-
2012
- 2012-06-15 CN CN 201220282815 patent/CN202633173U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110706954A (en) * | 2019-09-12 | 2020-01-17 | 恒大智慧充电科技有限公司 | Emergency stop switch circuit and emergency stop and reset method of emergency stop switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121226 |
|
| CX01 | Expiry of patent term |