CN207199532U - Relay is depressured holding circuit - Google Patents
Relay is depressured holding circuit Download PDFInfo
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- CN207199532U CN207199532U CN201720978164.0U CN201720978164U CN207199532U CN 207199532 U CN207199532 U CN 207199532U CN 201720978164 U CN201720978164 U CN 201720978164U CN 207199532 U CN207199532 U CN 207199532U
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Abstract
The utility model discloses a kind of relay to be depressured holding circuit.Relay decompression holding circuit includes：Feedback signal input terminal, for receiving feedback signal, wherein, feedback signal is the signal that is obtained by detection signal, and detection signal is that obtained signal is detected to dc bus；Control circuit, it is connected with feedback signal input terminal, for controlling the output voltage values of power supply according to feedback signal to reduce the maintenance pick-up voltage of relay coil, wherein, power supply is the power supply for being powered for relay coil.The utility model solves the technical problem that relay decompression holding circuit of the prior art can not effectively reduce the power of driving coil.
Description
Technical field
Circuit field is the utility model is related to, holding circuit is depressured in particular to a kind of relay.
Background technology
There is the problem of temperature rise is too high in relay, influence the service life of relay in use, reduce relay
Reliability.In order to reduce the temperature rise of relay, producer generally sets different pick-up voltages and maintenance voltage to relay, with
Ensure the reliability and service life of relay.
The relay decompression keeping method used at this stage often connected on main relay coil resistance with after
Electrical equipment circuit realiration in parallel.On startup, ohmically small relay is connected in parallel on by closure and masks resistance, realize master
The startup adhesive of relay；After adhesive, disconnection is connected in parallel on ohmically small relay, makes resistant series in the line of main relay
On circle, the electric current of main relay coil is flowed through in limitation, maintains the reliable adhesive of relay.But which is maintained by series resistance
The adhesive of main relay, only it is that the part heating of relay has been transferred in series resistance, drives the power supply work(of relay
Rate does not reduce.
Relay decompression holding circuit can effectively reduce relay coil loss, reduce coil heating, extend device lifetime.
For relay decompression holding circuit using with being realized by the way of coil series resistance, which does not reduce driving really at this stage
The power of coil, only by a part of power consumption in series resistance.
Asking for the power of driving coil can not be effectively reduced for relay of the prior art decompression holding circuit
Topic, not yet proposes effective solution at present.
Utility model content
The utility model embodiment provides a kind of relay decompression holding circuit, with least solve it is of the prior art after
Electrical equipment decompression holding circuit can not effectively reduce the technical problem of the power of driving coil.
According to the one side of the utility model embodiment, there is provided a kind of relay is depressured holding circuit, the relay
Decompression holding circuit includes：Feedback signal input terminal, for receiving feedback signal, wherein, feedback signal is to be obtained by detection signal
The signal arrived, detection signal are that obtained signal is detected to dc bus；Control circuit, it is connected with feedback signal input terminal
Connect, for controlling the output voltage values of power supply according to feedback signal to reduce the maintenance pick-up voltage of relay coil, wherein, electricity
Source is the power supply for being powered for relay coil.
Further, relay decompression holding circuit also includes：Circuit occurs for feedback signal, with feedback signal input terminal
It is connected, for obtaining feedback signal by detection signal.
Further, circuit, which occurs, for feedback signal includes：Comparator circuit, the output end of comparator circuit are connected to feedback
Signal input part, the first input end of comparator circuit are connected to detection signal, and the second input of comparator circuit is connected to
Reference signal.
Further, comparator circuit includes：Comparator；First resistor, first end are connected to detection signal, and the second end connects
It is connected to the first input end of comparator；Second resistance, first end are connected to reference signal, and the second end is connected to the second of comparator
Input；3rd resistor, it is connected to the output end of comparator.
Further, comparator circuit includes：First electric capacity, is connected to first node, wherein, first node is the first electricity
Node between resistance and comparator；Second electric capacity, is connected to section point, wherein, section point is second resistance and comparator
Between node.
Further, circuit, which occurs, for feedback signal also includes：Circuit is detected, is connected with feedback signal input terminal, is used for
DC bus-bar voltage is detected.
Further, detection circuit includes：Operational amplifier；First sampling end, first end are connected to DC bus-bar voltage
Positive pole, the second end is connected to the first input end of operational amplifier；Second sampling end, first end are connected to DC bus-bar voltage
Negative pole, the second end is connected to the second input of operational amplifier, wherein, the output end and feedback signal of operational amplifier are defeated
Enter end to be connected.
Further, detection circuit also includes：4th resistance, the 5th resistance, the 6th resistance, be connected on the first sampling end and
Between operational amplifier；7th resistance, the 8th resistance, the 9th resistance, it is connected between the second sampling end and operational amplifier.
Further, detection circuit also includes：Tenth resistance and the 3rd electric capacity, are arranged in parallel with operational amplifier.
Further, detection circuit also includes：Comparator circuit, it is defeated that the output end of comparator circuit is connected to feedback signal
Enter end, the first input end of comparator circuit is connected to detection circuit, and the second input of comparator circuit is connected to reference to letter
Number.
In the utility model embodiment, holding circuit is depressured using the relay including following structure：Feedback signal is defeated
Enter end, for receiving feedback signal, wherein, feedback signal is the signal obtained by detection signal, and detection signal is female to direct current
Line is detected obtained signal；Control circuit, it is connected with feedback signal input terminal, for controlling power supply according to feedback signal
Output voltage values to reduce the maintenance pick-up voltage of relay coil, wherein, power supply is for being powered for relay coil
Power supply, controlling the output voltage values of power supply according to feedback signal, having reached has to reduce the maintenance pick-up voltage of relay coil
Effect reduces the technique effect of the power of driving coil, so solve relay of the prior art decompression holding circuit without
Method effectively reduces the technical problem of the power of driving coil.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding to of the present utility model, forms the part of the application,
Schematic description and description of the present utility model is used to explain the utility model, does not form to of the present utility model improper
Limit.In the accompanying drawings：
Fig. 1 is the schematic diagram that holding circuit is depressured according to a kind of relay of the utility model embodiment；
Fig. 2 is the schematic diagram according to a kind of comparator circuit of the utility model embodiment；And
Fig. 3 is the schematic diagram according to a kind of direct current bus voltage detecting circuit of the utility model embodiment.
Embodiment
In order that those skilled in the art more fully understand the utility model, it is real below in conjunction with the utility model
The accompanying drawing in example is applied, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that be described
Embodiment is only the embodiment of the utility model part, rather than whole embodiments.Based on the reality in the utility model
Example is applied, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all should
When the scope for belonging to the utility model protection.
It should be noted that term " first " in specification and claims of the present utility model and above-mentioned accompanying drawing,
" second " etc. is for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so
The data used can exchange in the appropriate case, so that embodiment of the present utility model described herein can be with except at this
In diagram or description those beyond order implement.In addition, term " comprising " and " having " and their any deformation, meaning
Figure be to cover it is non-exclusive include, need not for example, containing the process of series of steps or unit, system, product or equipment
Be limited to those steps or the unit clearly listed, but may include not list clearly or for these processes, product
Or the intrinsic other steps of equipment or unit.
The utility model embodiment provides a kind of relay decompression holding circuit.
Relay decompression holding circuit includes：Feedback signal input terminal, for receiving feedback signal, wherein, feedback letter
Number for the signal that is obtained by detection signal, detection signal is that obtained signal is detected to dc bus；Control circuit, it is and anti-
Feedback signal input is connected, for controlling the output voltage values of power supply according to feedback signal to reduce the maintenance of relay coil
Pick-up voltage, wherein, power supply is the power supply for being powered for relay coil.It is described below by taking Fig. 1 as an example.
Fig. 1 is the schematic diagram that holding circuit is depressured according to a kind of relay of the utility model embodiment.
As shown in figure 1, feedback signal input terminal is CTL, for receiving feedback signal, wherein, feedback signal is by detecting
The signal that signal obtains, detection signal are that obtained signal is detected to dc bus.Pwm control circuit is except being connected to
Outside CTL, pwm signal is additionally coupled to.Circuit shown in the figure can be used as power voltage step down control circuit, realize power voltage step down control
The function of system.
In the utility model embodiment, holding circuit is depressured using the relay including above structure, according to feedback letter
The output voltage values of number control power supply have reached effective reduction driving coil to reduce the maintenance pick-up voltage of relay coil
The technique effect of power,
Further, relay decompression holding circuit also includes：Circuit occurs for feedback signal, with feedback signal input terminal
It is connected, for obtaining feedback signal by detection signal.
Circuit, which occurs, for feedback signal to be realized using comparator circuit, and further, circuit bag occurs for feedback signal
Include：Comparator circuit, the output end of comparator circuit are connected to feedback signal input terminal, and the first input end of comparator circuit connects
Detection signal is connected to, the second input of comparator circuit is connected to reference signal.
Fig. 2 is the schematic diagram according to a kind of comparator circuit of the utility model embodiment.
As shown in Fig. 2 the comparator circuit includes：Comparator；First resistor, first end are connected to detection signal, and second
End is connected to the first input end of comparator；Second resistance, first end are connected to reference signal, and the second end is connected to comparator
Second input；3rd resistor, it is connected to the output end of comparator.
Further, comparator circuit includes：First electric capacity, is connected to first node, wherein, first node is the first electricity
Node between resistance and comparator；Second electric capacity, is connected to section point, wherein, section point is second resistance and comparator
Between node.
Circuit, which occurs, for the feedback signal of the utility model embodiment can also include detection circuit, the detection circuit and feedback
Signal input part is connected, for being detected to DC bus-bar voltage.
Fig. 3 is the schematic diagram according to a kind of direct current bus voltage detecting circuit of the utility model embodiment.Such as Fig. 3 institutes
Show, the detection circuit includes：Operational amplifier；First sampling end, first end are connected to the positive pole of DC bus-bar voltage, the second end
It is connected to the first input end of operational amplifier；Second sampling end, first end are connected to the negative pole of DC bus-bar voltage, the second end
The second input of operational amplifier is connected to, wherein, the output end of operational amplifier is connected with feedback signal input terminal.
Further, detection circuit also includes：4th resistance R6, the 5th resistance R5, the 6th resistance R1, it is connected on first and adopts
Between sample end and operational amplifier；7th resistance R7, the 8th resistance R8, the 9th resistance R9, it is connected on the second sampling end and computing
Between amplifier.
Further, detection circuit also includes：Tenth resistance R4 and the 3rd electric capacity C1, it is in parallel with operational amplifier IC1 to set
Put.
Further, detection circuit also includes：Comparator circuit, it is defeated that the output end of comparator circuit is connected to feedback signal
Enter end, the first input end of comparator circuit is connected to detection circuit, and the second input of comparator circuit is connected to reference to letter
Number.The comparator circuit can be the comparator circuit of previous embodiment description.
Direct current bus voltage detecting circuit samples the DC bus-bar voltage DC after output sampling by difference.Then, sample
Voltage DC is compared with reference voltage signal V_ref, and output digit signals CTL, signal CTL is as d-c bus voltage value
One feedback control power voltage step down circuit, together with the output voltage of power circuit, pwm signal is adjusted, is input to so as to reduce
The voltage of relay coil, realize that the decompression of relay is kept, the temperature rise of control relay, extend life-span of relay.
The utility model embodiment controls the output voltage values of power supply using DC bus-bar voltage signal as feedback signal,
The power output of relay coil driving power is reduced, so as to reduce the maintenance pick-up voltage of relay coil.
The electronic component that the utility model embodiment uses is few, and economic input is few, and control is stable, fundamentally reduces
The heating of relay.
For the job stability of current transformer, it is necessary to which dc bus is detected.The utility model embodiment is used existing
Maintenance pick-up voltage of the dc bus detected value to relay be controlled, increasing the condition of few device and cost
Under, the maintenance pick-up voltage of relay coil is reduced, reduces relay heating.
For controlled rectification circuit, relay closure will charge to dc bus, so that the voltage of dc bus
Rise, by detecting the value of DC bus-bar voltage, can be controlled to the pick-up voltage of relay, reduce the work(of relay
Consumption, reduce heating.
The reduction voltage circuit of relay can be the circuit for including Fig. 1, Fig. 2 and Fig. 3 three parts.
Fig. 2 circuits carry out data acquisition by way of difference sampling to DC bus-bar voltage, by DC bus-bar voltage
Positive pole DC+, negative pole DC- are coupled with the resistance of integrated operational amplifier front end, are distinguished by the signal after electric resistance partial pressure
The positive and negative input of operational amplifier is delivered to, output is to the sampled signal DC between DC+, DC- after operational amplifier.
The sampled signal DC of the DC bus-bar voltage of Fig. 2 outputs is input to Fig. 3 comparator circuit, with comparator circuit
A reference value be compared, sampling DC bus-bar voltage be more than a reference value V_ref in the case of change comparator output
Signal CTL, signal CTL change will be applied directly in the PWM controls of reduction voltage circuit, influence the frequency and duty of pwm signal
Than so as to control the magnitude of voltage for being connected to relay coil.
This programme is by the way that by Fig. 2 and Fig. 3 circuit, relay power supply is fed back to by the voltage signal of dc bus
In control, by changing the dutycycle or switching frequency of metal-oxide-semiconductor, the voltage for driving relay is controlled, directly reduces and makees
The magnitude of voltage of relay coil is used, realizes that the decompression of relay is kept.
The decompression that the embodiment only realizes relay coil by hardware circuit is kept, without being modified to software, phase
Than fundamentally reducing the voltage of power supply in the mode of the series resistance on relay coil, the design, reducing relay
Heating, that is, improve the whole efficiency of system, at the same without the resistance temperature for considering to be connected on coil it is too high the problem of.
The mode for having used difference to sample in above example samples DC bus-bar voltage, so as to being applied to relay line
Voltage on circle is controlled, and alternatively, the utility model embodiment can also sample direct current by way of voltage sensor
Busbar voltage realizes the mode that relay decompression is kept.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (10)
1. a kind of relay is depressured holding circuit, it is characterised in that including：
Feedback signal input terminal, for receiving feedback signal, wherein, the feedback signal is the signal obtained by detection signal,
The detection signal is that obtained signal is detected to dc bus；And control circuit, with the feedback signal input terminal
It is connected, it is electric to reduce the maintenance adhesive of relay coil for controlling the output voltage values of power supply according to the feedback signal
Pressure, wherein, the power supply is the power supply for being powered for the relay coil.
2. relay according to claim 1 is depressured holding circuit, it is characterised in that also includes：
Circuit occurs for feedback signal, is connected with the feedback signal input terminal, described anti-for being obtained by the detection signal
Feedback signal.
3. relay according to claim 2 is depressured holding circuit, it is characterised in that circuit bag occurs for the feedback signal
Include：
Comparator circuit, the output end of the comparator circuit are connected to the feedback signal input terminal, the comparator circuit
First input end be connected to the detection signal, the second input of the comparator circuit is connected to reference signal.
4. relay according to claim 3 is depressured holding circuit, it is characterised in that the comparator circuit includes：
Comparator；
First resistor, first end are connected to the detection signal, and the second end is connected to the first input end of the comparator；
Second resistance, first end are connected to the reference signal, and the second end is connected to the second input of the comparator；And
3rd resistor, it is connected to the output end of the comparator.
5. relay according to claim 4 is depressured holding circuit, it is characterised in that the comparator circuit includes：
First electric capacity, is connected to first node, wherein, the first node is between the first resistor and the comparator
Node；And
Second electric capacity, is connected to section point, wherein, the section point is between the second resistance and the comparator
Node.
6. relay according to claim 2 is depressured holding circuit, it is characterised in that circuit occurs for the feedback signal also
Including：
Circuit is detected, is connected with the feedback signal input terminal, for being detected to DC bus-bar voltage.
7. relay according to claim 6 is depressured holding circuit, it is characterised in that the detection circuit includes：
Operational amplifier；
First sampling end, first end are connected to the positive pole of the DC bus-bar voltage, and the second end is connected to the operational amplifier
First input end；
Second sampling end, first end are connected to the negative pole of the DC bus-bar voltage, and the second end is connected to the operational amplifier
The second input,
Wherein, the output end of the operational amplifier is connected with the feedback signal input terminal.
8. relay according to claim 7 is depressured holding circuit, it is characterised in that the detection circuit also includes：
4th resistance, the 5th resistance, the 6th resistance, it is connected between first sampling end and the operational amplifier；And
7th resistance, the 8th resistance, the 9th resistance, it is connected between second sampling end and the operational amplifier.
9. relay according to claim 7 is depressured holding circuit, it is characterised in that the detection circuit also includes：
Tenth resistance and the 3rd electric capacity, it is arranged in parallel with the operational amplifier.
10. relay according to claim 6 is depressured holding circuit, it is characterised in that the detection circuit also includes：
Comparator circuit, the output end of the comparator circuit are connected to the feedback signal input terminal, the comparator circuit
First input end be connected to the detection circuit, the second input of the comparator circuit is connected to reference signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720978164.0U CN207199532U (en) | 2017-08-07 | 2017-08-07 | Relay is depressured holding circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720978164.0U CN207199532U (en) | 2017-08-07 | 2017-08-07 | Relay is depressured holding circuit |
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| Publication Number | Publication Date |
|---|---|
| CN207199532U true CN207199532U (en) | 2018-04-06 |
Family
ID=61796721
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720978164.0U Active CN207199532U (en) | 2017-08-07 | 2017-08-07 | Relay is depressured holding circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107507734A (en) * | 2017-08-07 | 2017-12-22 | 珠海格力电器股份有限公司 | Relay is depressured holding circuit |
-
2017
- 2017-08-07 CN CN201720978164.0U patent/CN207199532U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107507734A (en) * | 2017-08-07 | 2017-12-22 | 珠海格力电器股份有限公司 | Relay is depressured holding circuit |
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