CN206948283U - Power line zero crossing modulation circuit - Google Patents
Power line zero crossing modulation circuit Download PDFInfo
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- CN206948283U CN206948283U CN201720748285.6U CN201720748285U CN206948283U CN 206948283 U CN206948283 U CN 206948283U CN 201720748285 U CN201720748285 U CN 201720748285U CN 206948283 U CN206948283 U CN 206948283U
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Abstract
The utility model discloses a kind of power line zero crossing modulation circuit, belong to field of circuit technology.It includes auxiliary power circuit (1), thyristor gating circuit (2), enables control circuit (3) and edge accelerating circuit (4)；It is connected outside the auxiliary power circuit (1) with live wire L, zero line N；The auxiliary power circuit (1) is connected with thyristor gating circuit (2) and enabled control circuit (3)；The edge accelerating circuit (4) is connected with thyristor gating circuit (2)；It is connected outside the thyristor gating circuit (2) with live wire L.It carries accessory power supply, low in energy consumption, precision is high, strong antijamming capability, further, it is possible to realize strong and weak electric isolution.
Description
Technical field
Field of circuit technology is the utility model is related to, more particularly to a kind of power line zero crossing modulation circuit.
Background technology
There are a kind of power line zero crossing modulation circuit as shown in Figure 1, control unit A the first pin in the prior art
The base stage of triode is connected to, the colelctor electrode of triode is connected to diode D1 anode and the first of KCB triggering transformers is drawn
Pin, diode D1 negative electrode are connected to resistance R1 one end, and the resistance R1 other end is connected to voltage V1 and KCB triggering transformer
Second pin, the 3rd pin of KCB triggering transformers is connected to diode D2 anode, and diode D2 negative electrode is connected to two
The negative electrode of diode in pole pipe D3 negative electrode, resistance R2 one end and controllable silicon unit C, KCB trigger the 4th pin of transformer
It is connected to the negative electrode of diode in diode D3 anode, the resistance R2 other end and controllable silicon unit C；The of control unit A
Two pins, the emitter stage of triode are grounded simultaneously.Its shortcoming essentially consists in：
(1) the triggering volume of transformer of the program is big, and can not prevent false triggering when power voltage line is too high；
(2) control monitors zero crossing, it is necessary to additionally increase zero-crossing detection circuit at the time of trigger signal；
(3) equipment dependability is realized by software entirely under the program, if controller causes controllable silicon when voltage is higher extremely
Conducting, may cause danger.
In addition to such scheme, other most of power line zero crossing modulation circuits be also typically present circuit structure it is complicated,
The problems such as cost is high, or accuracy of detection is low, power consumption is big.
Utility model content
In view of this, the utility model provides a kind of power line zero crossing modulation circuit, and it carries accessory power supply, power consumption
It is low, precision is high, strong antijamming capability, further, it is possible to strong and weak electric isolution be realized, thus more suitable for practicality.
In order to achieve the above object, the technical scheme of power line zero crossing modulation circuit provided by the utility model is as follows：
Power line zero crossing modulation circuit provided by the utility model includes auxiliary power circuit (1), control machines electricity
Road (2), enable control circuit (3) and edge accelerating circuit (4)；
It is connected outside the auxiliary power circuit (1) with live wire L, zero line N；
The auxiliary power circuit (1) is connected with thyristor gating circuit (2) and enabled control circuit (3)；
The edge accelerating circuit (4) is connected with thyristor gating circuit (2)；
It is connected outside the thyristor gating circuit (2) with live wire L.
Power line zero crossing modulation circuit provided by the utility model can be also applied to the following technical measures to achieve further.
Preferably, the auxiliary power circuit (1), including divider resistance R1, R2 and R3, storage capacitor C2, voltage stabilizing two
Pole pipe VD2, filter capacitor C1, fly-wheel diode VD1 and charging resistor R4；
Divider resistance R3 one end, electric capacity C1 one end, voltage-regulator diode VD2 anode, electric capacity C2 one end are connected simultaneously
It is connected to zero line N；
The divider resistance R3 other end, divider resistance R2 one end, the electric capacity C1 other end, fly-wheel diode VD1 sun
Pole, resistance R4 one end are connected and are connected to the enabled control circuit (3)；
The divider resistance R2 other end is connected to divider resistance R1 one end；
The divider resistance R1 other end is connected to live wire L；
Afterflow diode VD1 negative electrode, voltage-regulator diode VD2 negative electrode, the electric capacity C2 other end are connected and are connected to institute
State thyristor gating circuit (2)；
Voltage-regulator diode VD2 is in parallel with storage capacitor C2, for limiting the magnitude of voltage at C2 both ends.
Preferably, the thyristor gating circuit (2), including control triode V2, bleeder resistance R6, filter capacitor
C3, C5, current-limiting resistance R5, R9, divider resistance R10, controllable silicon V3；
Controllable silicon V3 anode is connect with live wire L lines, and negative electrode is connected with zero line N, and filter capacitor C5, divider resistance R10 are in parallel
Between controllable silicon V3 control pole and negative electrode；
Divider resistance R10 one end is connected to current-limiting resistance R9 one end；
The current-limiting resistance R9 other end is connected to control triode V2 colelctor electrode；
Control triode V2 base stage is connected to bleeder resistance R6 one end, filter capacitor C3 one end, current-limiting resistance R5
One end；
Control triode V2 emitter stage, bleeder resistance the R6 other end, the filter capacitor C3 other end is connected to simultaneously
The auxiliary power circuit (1)；
The current-limiting resistance R5 other end is connected to the enabled control circuit (3)；
The current-limiting resistance R9 other end, the divider resistance R10 other end, control triode V2 colelctor electrode are connected to
The edge accelerating circuit (4).
Preferably, the edge accelerating circuit (4) includes control triode V1, current-limiting resistance R7 and filter capacitor V4；
Filter capacitor C4 both ends are connected in parallel on control triode V1 base stage and penetrated between level；
Control triode V1 is connected to the thyristor gating circuit (2) and the enabled control circuit (3) simultaneously；
The current-limiting resistance R7 other end, the electric capacity C4 other end is connected to the thyristor gating circuit (2)；
Current-limiting resistance R7 and filter capacitor C4 composition LPFs, anti-control triode V1 base stage is because interference false touch
Hair.
Preferably, the enabled control circuit (3) includes optocoupler E1 and current-limiting resistance R8；
The anode of light emitting diode in optocoupler E1 and R8 one end are connected, and the negative electrode of light emitting diode is connected with GND, R8
The other end be connected with enabled control signal CRTL；
The emitter stage of triode in optocoupler E1 is connected to the auxiliary power circuit (1)；Triode in optocoupler E1
Colelctor electrode is connected to the thyristor gating circuit (2) and the edge accelerating circuit (4).
Power line zero crossing modulation circuit provided by the utility model carries voltage detecting, and controllable silicon can be prevented too high
Triggered under voltage, controllable silicon can only drop under voltage to be turned on along the certain limit before zero crossing, and once triggering can be held
Continue negative half period to start, single-phase silicon-controlled automatic disconnection.It controls controllable silicon at the zero crossing moment of power line by optocoupler E1
Preceding conducting, shifting to an earlier date for power line zero crossing is realized, so as to reach the modulation of power line zero crossing.The circuit also carries voltage detecting,
It can prevent controllable silicon from being triggered under too high voltages, controllable silicon can only drop under voltage leads along the certain limit before zero crossing
It is logical, and once triggering can continue to that negative half period starts, single-phase silicon-controlled automatic disconnection.Its trigger the energy that uses of controllable silicon from
Forceful electric power end obtains, it is not necessary to extra accessory power supply, and the power supply power consumption very little, slowly charged using voltage positive axis,
It is full of before control machines, then when needing zero-cross modulation, moment is bled off, and controlled silicon conducting is triggered using current impulse.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to this practicality
New limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is a kind of circuit diagram of power line zero crossing modulation circuit of the prior art；
Fig. 2 is the circuit diagram for the power line zero crossing modulation circuit that the utility model embodiment provides；
The schematic diagram for the power line zero crossing modulation circuit that Fig. 3 positions the utility model embodiment provides.
Embodiment
The utility model is to solve the problems, such as that prior art is present, there is provided a kind of power line zero crossing modulation circuit, it is certainly
Band accessory power supply, low in energy consumption, precision is high, strong antijamming capability, further, it is possible to strong and weak electric isolution be realized, thus more suitable for reality
With.
Further to illustrate that the utility model is to reach the technological means and effect that predetermined purpose of utility model taken,
Below in conjunction with accompanying drawing and preferred embodiment, to according to the utility model proposes power line zero crossing modulation circuit, it is specific real
Mode, structure, feature and its effect are applied, is described in detail as after.In the following description, different " embodiment " or " embodiment "
What is referred to is not necessarily the same embodiment.In addition, the special characteristic, structure or feature in one or more embodiments can be by any conjunctions
Conformal formula combination.
The terms "and/or", only a kind of incidence relation for describing affiliated partner, expression may have three kinds of passes
System, for example, A and/or B, is specifically interpreted as：A and B can be included simultaneously, can be with individualism A, can also individualism
B, can possess above-mentioned three kinds of any situations.
Referring to accompanying drawing 2 and accompanying drawing 3, the power line zero crossing modulation circuit that the utility model embodiment provides includes auxiliary electricity
Source circuit (1), thyristor gating circuit (2), enable control circuit (3) and edge accelerating circuit (4).Auxiliary power circuit (1)
Outside is connected with live wire L, zero line N；Auxiliary power circuit (1) connects with thyristor gating circuit (2) and enabled control circuit (3)
Connect；Edge accelerating circuit (4) is connected with thyristor gating circuit (2)；It is connected outside thyristor gating circuit (2) with live wire L.
Wherein, auxiliary power circuit (1), including divider resistance R1, R2 and R3, storage capacitor C2, voltage-regulator diode VD2,
Filter capacitor C1, fly-wheel diode VD1 and charging resistor R4.Divider resistance R3 one end, electric capacity C1 one end, voltage-regulator diode
VD2 anode, electric capacity C2 one end are connected and are connected to zero line N；The divider resistance R3 other end, divider resistance R2 one end,
The electric capacity C1 other end, fly-wheel diode VD1 anode, resistance R4 one end are connected and are connected to enabled control circuit (3)；Point
The piezoresistance R2 other end is connected to divider resistance R1 one end；The divider resistance R1 other end is connected to live wire L；Afterflow two level
Pipe VD1 negative electrode, voltage-regulator diode VD2 negative electrode, the electric capacity C2 other end are connected and are connected to thyristor gating circuit (2)；
Voltage-regulator diode VD2 is in parallel with storage capacitor C2, for limiting the magnitude of voltage at C2 both ends.
Wherein, thyristor gating circuit (2), including control triode V2, bleeder resistance R6, filter capacitor C3, C5, current limliting
Resistance R5, R9, divider resistance R10, controllable silicon V3.Controllable silicon V3 anode is connect with live wire L lines, and negative electrode is connected with zero line N, filtering
Electric capacity C5, divider resistance R10 are connected in parallel between controllable silicon V3 control pole and negative electrode；Divider resistance R10 one end is connected to limit
Leakage resistance R9 one end；The current-limiting resistance R9 other end is connected to control triode V2 colelctor electrode；Control triode V2 base
Pole is connected to bleeder resistance R6 one end, filter capacitor C3 one end, current-limiting resistance R5 one end；Control triode V2 transmitting
Pole, the bleeder resistance R6 other end, the filter capacitor C3 other end are connected to auxiliary power circuit (1) simultaneously；Current-limiting resistance R5
The other end be connected to enabled control circuit (3)；The current-limiting resistance R9 other end, the divider resistance R10 other end, three poles of control
Pipe V2 colelctor electrode is connected to edge accelerating circuit (4).
Wherein, edge accelerating circuit (4) includes control triode V1, current-limiting resistance R7 and filter capacitor V4.Filter capacitor
C4 both ends are connected in parallel on control triode V1 base stage and penetrated between level；Control triode V1 is connected to thyristor gating circuit simultaneously
And enabled control circuit (3) (2)；The current-limiting resistance R7 other end, the electric capacity C4 other end is connected to control machines electricity
Road (2)；Current-limiting resistance R7 and filter capacitor C4 composition LPFs, anti-control triode V1 base stage is because interference false triggering.
Wherein, enabling control circuit (3) includes optocoupler E1 and current-limiting resistance R8.The anode of light emitting diode in optocoupler E1
It is connected with R8 one end, the negative electrode of light emitting diode is connected with GND, and the R8 other end is connected with enabled control signal CRTL；Light
The emitter stage of triode in coupling E1 is connected to auxiliary power circuit (1)；The colelctor electrode of triode in optocoupler E1 connects respectively
In thyristor gating circuit (2) and edge accelerating circuit (4).
The function for the power line zero crossing modulation circuit that the utility model embodiment provides is as follows：
Control controllable silicon to be turned on before the zero crossing moment of power line by optocoupler E1, realize carrying for power line zero crossing
Before, so as to reach the modulation of power line zero crossing.The circuit also carries voltage detecting, can prevent controllable silicon from being touched under too high voltages
Hair, controllable silicon can only drop under voltage to be turned on along the certain limit before zero crossing, and once triggering can continue to negative half
Week, single-phase silicon-controlled automatic disconnection.
The energy that modulation circuit triggering controllable silicon uses obtains from forceful electric power end, it is not necessary to the accessory power supply that volume is, and
The power supply power consumption very little, is slowly charged using voltage positive axis, is full of before control machines, then when needing zero-cross modulation
Moment is bled off, and controlled silicon conducting is triggered using current impulse.
The principle for the power line zero crossing modulation circuit that the utility model embodiment provides is as follows：
Auxiliary power circuit (1), in L~N power line positive axis, by the voltage after divider resistance R1, R2 and R3 partial pressure
Charged by diode VD1 and resistance R4 to C2 storage capacitors, for providing the energy of enough triggerings, voltage-stabiliser tube to controllable silicon V3
VD2 is used for the peak for limiting charging voltage；R4, R3 are used for L~N power line negative half periods and released C2 energy so that positive axis
Without enough activated with energy controllable silicons during beginning, it is ensured that system safety.Low pass circuit is formed by C1 and R1, R2, R3 in addition,
For filtering out the clutter on power line.
Thyristor gating circuit (2), in the positive half cycle of L~N power voltage lines, when R3 branch pressure voltages ＜ (C2 both end voltages)-
When (V2 triode Vbe voltages), if now optocoupler turns on, triode V2 B can form discharge path, V2 by R5, E1, R3
Turn on so as to trigger controllable silicon.
Edge accelerating circuit (4), due to the finite energy of C2 electric capacity storage, if so controllable silicon V3 trigger signals edge delays
Slowly, then the energy of C2 storages will not form big pulse current, be not enough to trigger controllable silicon V3, therefore increase positive feedback side in circuit
Along accelerating circuit (4).When triode V2 is turned on, triode V1 can and then be turned on and V2 base resistance R5 is pulled down to N,
Therefore V2 driving current becomes big, can accelerate further to open, and forms positive feedback so that trigger signal edge becomes precipitous.
Enabled control circuit (3), only when CTRL control signals are set to high level, meet in L~N power voltage lines just half
In week, when R3 branch pressure voltages ＜ (C2 both end voltages)-(V2 triode Vbe voltages), controllable silicon V3 conductings could be triggered.
Although having been described for preferred embodiment of the present utility model, those skilled in the art once know substantially
Creative concept, then other change and modification can be made to these embodiments.So appended claims are intended to be construed to wrap
Include preferred embodiment and fall into having altered and changing for the scope of the utility model.
Obviously, those skilled in the art can carry out various changes and modification without departing from this practicality to the utility model
New spirit and scope.So, if these modifications and variations of the present utility model belong to the utility model claims and
Within the scope of its equivalent technologies, then the utility model is also intended to comprising including these changes and modification.
Claims (5)
1. a kind of power line zero crossing modulation circuit, it is characterised in that including auxiliary power circuit (1), thyristor gating circuit
(2) control circuit (3) and edge accelerating circuit (4), are enabled；
It is connected outside the auxiliary power circuit (1) with live wire L, zero line N；
The auxiliary power circuit (1) is connected with thyristor gating circuit (2) and enabled control circuit (3)；
The edge accelerating circuit (4) is connected with thyristor gating circuit (2)；
It is connected outside the thyristor gating circuit (2) with live wire L.
2. power line zero crossing modulation circuit according to claim 1, it is characterised in that the auxiliary power circuit (1), bag
Include divider resistance R1, R2 and R3, storage capacitor C2, voltage-regulator diode VD2, filter capacitor C1, fly-wheel diode VD1 and charging electricity
Hinder R4；
Divider resistance R3 one end, electric capacity C1 one end, voltage-regulator diode VD2 anode, electric capacity C2 one end are connected and connected
In zero line N；
The divider resistance R3 other end, divider resistance R2 one end, the electric capacity C1 other end, fly-wheel diode VD1 anode, electricity
Resistance R4 one end is connected and is connected to the enabled control circuit (3)；
The divider resistance R2 other end is connected to divider resistance R1 one end；
The divider resistance R1 other end is connected to live wire L；
Afterflow diode VD1 negative electrode, voltage-regulator diode VD2 negative electrode, the electric capacity C2 other end be connected and be connected to it is described can
Control silicon triggers circuit (2)；
Voltage-regulator diode VD2 is in parallel with storage capacitor C2, for limiting the magnitude of voltage at C2 both ends.
3. power line zero crossing modulation circuit according to claim 1, it is characterised in that the thyristor gating circuit (2),
Including controlling triode V2, bleeder resistance R6, filter capacitor C3, C5, current-limiting resistance R5, R9, divider resistance R10, controllable silicon V3；
The thyristor gating circuit (2), including control triode V2, bleeder resistance R6, filter capacitor C3, C5, current-limiting resistance
R5, R9, divider resistance R10, controllable silicon V3；
Controllable silicon V3 anode is connect with live wire L lines, and negative electrode is connected with zero line N, filter capacitor C5, divider resistance R10 is connected in parallel on can
Between control pole and the negative electrode of controlling silicon V3；
Divider resistance R10 one end is connected to current-limiting resistance R9 one end；
The current-limiting resistance R9 other end is connected to control triode V2 colelctor electrode；
Control triode V2 base stage is connected to bleeder resistance R6 one end, filter capacitor C3 one end, the one of current-limiting resistance R5
End；
Control triode V2 emitter stage, the bleeder resistance R6 other end, the filter capacitor C3 other end are connected to described simultaneously
Auxiliary power circuit (1)；
The current-limiting resistance R5 other end is connected to the enabled control circuit (3)；
The current-limiting resistance R9 other end, the divider resistance R10 other end, control triode V2 colelctor electrode are connected to described
Edge accelerating circuit (4).
4. power line zero crossing modulation circuit according to claim 1, it is characterised in that edge accelerating circuit (4) bag
Include control triode V1, current-limiting resistance R7 and filter capacitor V4；
Filter capacitor C4 both ends are connected in parallel on control triode V1 base stage and penetrated between level；
Control triode V1 is connected to the thyristor gating circuit (2) and the enabled control circuit (3) simultaneously；
The current-limiting resistance R7 other end, the electric capacity C4 other end is connected to the thyristor gating circuit (2)；
Current-limiting resistance R7 and filter capacitor C4 composition LPFs, anti-control triode V1 base stage is because interference false triggering.
5. power line zero crossing modulation circuit according to claim 1, it is characterised in that enabled control circuit (3) bag
Include optocoupler E1 and current-limiting resistance R8；
The anode of light emitting diode in optocoupler E1 and R8 one end are connected, and the negative electrode of light emitting diode is connected with GND, and R8's is another
One end is connected with enabled control signal CRTL；
The emitter stage of triode in optocoupler E1 is connected to the auxiliary power circuit (1)；
The colelctor electrode of triode in optocoupler E1 is connected to the thyristor gating circuit (2) and the edge accelerating circuit
(4)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720748285.6U CN206948283U (en) | 2017-06-26 | 2017-06-26 | Power line zero crossing modulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720748285.6U CN206948283U (en) | 2017-06-26 | 2017-06-26 | Power line zero crossing modulation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206948283U true CN206948283U (en) | 2018-01-30 |
Family
ID=61364863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720748285.6U Withdrawn - After Issue CN206948283U (en) | 2017-06-26 | 2017-06-26 | Power line zero crossing modulation circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN206948283U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425834A (en) * | 2017-06-26 | 2017-12-01 | 青岛东软载波科技股份有限公司 | Power line zero crossing modulation circuit |
-
2017
- 2017-06-26 CN CN201720748285.6U patent/CN206948283U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425834A (en) * | 2017-06-26 | 2017-12-01 | 青岛东软载波科技股份有限公司 | Power line zero crossing modulation circuit |
| CN107425834B (en) * | 2017-06-26 | 2023-07-07 | 青岛东软载波科技股份有限公司 | Power line zero-crossing modulation circuit |
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Granted publication date: 20180130 Effective date of abandoning: 20230707 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180130 Effective date of abandoning: 20230707 |