CN206260105U - A kind of circuit that high-voltage pulse signal is converted to low pressure pulse width signal - Google Patents
A kind of circuit that high-voltage pulse signal is converted to low pressure pulse width signal Download PDFInfo
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- CN206260105U CN206260105U CN201621234608.1U CN201621234608U CN206260105U CN 206260105 U CN206260105 U CN 206260105U CN 201621234608 U CN201621234608 U CN 201621234608U CN 206260105 U CN206260105 U CN 206260105U
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- regulator diode
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model discloses a kind of circuit that high-voltage pulse signal is converted to low pressure pulse width signal, including rectification circuit, voltage-regulator diode D1, constant-current source, optocoupler, resistance R3, the input of rectification circuit is ac high-voltage input, and the output end of rectification circuit is through voltage-regulator diode D1, constant-current source be connected to the input of optocoupler, the output end output low pressure pulse width signal of optocoupler, voltage-regulator diode D1Negative electrode be connected with the output end of rectification circuit；Described resistance D3It is connected between DC source and optocoupler output.The circuit cost is low, and simple structure, practicality is high, and interference signal is few, high precision.
Description
Technical field
The utility model is related to be converted to high-voltage pulse signal the circuit of low pressure pulse width signal.
Background technology
The light fixture that tradition is dimmed with controllable silicon modulation voltage, its light source is mainly the osram lamp of pure resistor load,
Its operation principle is：Modulated by cut ripple to High Level AC Voltage, the size of control exchange electric output power, so as to realize tungsten
Silk bulb light modulation.But LED light source cannot directly access High Level AC Voltage and be dimmed, but to realize controllable silicon output control LED
Lamp light-regulating cuts ripple signal, dim signal of the reconvert into PWM duty cycle it is necessary to extract High Level AC Voltage.
High AC voltage is sampled, and can usually introduce various interference signals, and signal sampling band is given in the interference of high-voltage fence ripple
Carry out very big obstruction.
The content of the invention
In order to extract High AC voltage signal, low pressure pulse width signal is then converted into, the invention provides one kind by height
Pressure pulse width signal is converted to the circuit of low pressure pulse width signal, and circuit cost is low, and simple structure, practicality is high, and interference signal is few, essence
Degree is high.
To reach above-mentioned purpose, a kind of circuit that high-voltage pulse signal is converted to low pressure pulse width signal, including rectified current
Road, voltage-regulator diode D1, constant-current source, optocoupler, resistance R3, the input of rectification circuit is ac high-voltage input, rectification circuit
Output end is through voltage-regulator diode D1, constant-current source be connected to the input of optocoupler, the output end output low pressure pulse width signal of optocoupler, surely
Pressure diode D1Negative electrode be connected with the output end of rectification circuit；Described resistance D3Be connected to DC source and optocoupler output it
Between.
Further, described constant-current source includes resistance R1, resistance R2, metal-oxide-semiconductor Q1, triode Q2, resistance R5, the pole of voltage stabilizing two
Pipe D2With electric capacity C2；Resistance R1One end be connected to voltage-regulator diode D1Anode；Resistance R1The drain electrode of the other end and metal-oxide-semiconductor connect
Connect, meanwhile, resistance R1The other end and resistance R2One end connection；The source electrode of metal-oxide-semiconductor is connected with the input of optocoupler, metal-oxide-semiconductor
Grid and resistance R2The other end connection；Resistance R5One end be connected with the input of optocoupler, resistance R5The other end be connected to it is whole
Current circuit connection is grounded simultaneously；Triode Q2Base stage be connected to the input of optocoupler and resistance R5Between, triode Q2Collection
Electrode and resistance R2The other end connection, triode Q2Grounded emitter；Voltage-regulator diode D2It is connected in parallel on triode Q2Between,
Wherein, voltage-regulator diode D2Negative electrode and resistance R2The other end connection；Electric capacity C2It is connected in parallel on voltage-regulator diode D2Between.
Further, in voltage-regulator diode D1With resistance R1Between be connected with resistance R4, resistance R4The other end ground connection.
Further, electric capacity C is connected between optocoupler output1。
The beneficial effects of the utility model are：High-voltage AC signal by rectification circuit, by ac voltage rectifier into unidirectional
DC voltage.Then voltage-regulator diode D is connected1, D1Minimum voltage threshold values for controlling circuit turn-on, then connects constant current
Source, constant-current source output connection optocoupler input.Constant current needed for constant-current source offer optocoupler.By after light-coupled isolation, exporting
The pulse width signal of low pressure.Due to being provided with voltage-regulator diode and constant-current source, therefore, signal stabilization, the interference for being input to optocoupler are few,
So that high precision, practicality is high, and circuit of the present utility model simplifies relative to prior art construction in addition, low cost.
Brief description of the drawings
Fig. 1 is logic control circuit of the present utility model.
Fig. 2 is application circuit of the present utility model.
Fig. 3 cuts ac high-voltage signal waveforms after ripple for controllable silicon.
Fig. 4 is the low pressure pulse width signal oscillogram of output.
Specific embodiment
The utility model is further elaborated with reference to the accompanying drawings and detailed description.
As depicted in figs. 1 and 2, the circuit that high-voltage pulse signal is converted to low pressure pulse width signal is included into rectification circuit D3、
Voltage-regulator diode D1, constant-current source I, optocoupler U1, resistance R3, resistance R4With electric capacity C1。
Described constant-current source I includes resistance R1, resistance R2, metal-oxide-semiconductor Q1, triode Q2, resistance R5, voltage-regulator diode D2And electricity
Hold C2。
The input of rectification circuit is ac high-voltage input, and in the present embodiment, the input of rectification circuit is received can
Control silicon cuts the high-voltage AC signal after ripple.
Voltage-regulator diode D1Negative electrode be connected in the output end of rectification circuit, resistance R1One end be connected to the pole of voltage stabilizing two
Pipe D1Anode；Resistance R1The other end be connected with the drain electrode of metal-oxide-semiconductor, meanwhile, resistance R1The other end and resistance R2One end connect
Connect；Metal-oxide-semiconductor Q1Source electrode and optocoupler U1Input connection, metal-oxide-semiconductor Q1Grid and resistance R2The other end connection；Resistance R5's
One end and optocoupler U1Input connection, resistance R5The other end be connected to rectification circuit connection simultaneously be grounded GND；Triode Q2
Base stage be connected to optocoupler U1Input and resistance R5Between, triode Q2Colelctor electrode and resistance R2The other end connection,
Triode Q2Grounded emitter GND；Voltage-regulator diode D2It is connected in parallel on triode Q2Between, wherein, voltage-regulator diode D2Negative electrode
With resistance R2The other end connection；Electric capacity C2It is connected in parallel on voltage-regulator diode D2Between.
In voltage-regulator diode D1With resistance R1Between be connected with resistance R4, resistance R4The other end ground connection GND.
Optocoupler U1Output end output low pressure pulse width signal PWM, described resistance D3It is connected to DC source and optocoupler output
Between, electric capacity C is connected between optocoupler output1, electric capacity C1Ground connection GND1。
The operation principle of the above-mentioned circuit that high-voltage pulse signal is converted to low pressure pulse width signal is：After ripple being cut through controllable silicon
Ac high-voltage signal waveforms are as shown in figure 3, controllable silicon cuts the rectified circuit D of the ac high-voltage after ripple3List is converted to after rectification
To direct current, then connect voltage-regulator diode D1, D1Minimum voltage threshold values for controlling circuit turn-on, filters the low of power network
Ripple voltage is disturbed, and then connects constant-current source, constant-current source I output connection optocouplers U1Input.Constant-current source I is provided needed for optocoupler
Constant current.By after light-coupled isolation, the pulse width signal of low pressure being exported, referring to Fig. 4.R3It is signal output pull-up resistor, C1It is
Filter capacitor.
In the present embodiment, it is ensured that metal-oxide-semiconductor Q1Normal switch, just must add cut-in voltage Vgs, typically in grid
Vgs is 5 ~ 10V, by current-limiting resistance R2Cut-in voltage Vgs is provided.Voltage-regulator diode D2To metal-oxide-semiconductor Q1Grid protected.
Resistance R5It is current sampling resistor, triode Q2It is NPN triode, using Q2The junction voltage Vp of triode PN junction stabilization, detection stream
Sampled resistance R5Electric current I, through Q2After being amplified to sample rate current, close loop control circuit is formed, control the grid of metal-oxide-semiconductor
Voltage, so as to control to flow through the electric current of photodiode, reaches constant current purpose, and limiting circuit power consumption prevents from burning out optocoupler U1。
Due to being provided with voltage-regulator diode and constant-current source, therefore, signal stabilization, the interference for being input to optocoupler are few so that essence
Degree is high, and practicality is high, and circuit of the present utility model simplifies relative to prior art construction in addition, low cost.
Resistance R5Effect be eliminate signal DC voltage component.
Claims (4)
1. a kind of circuit that high-voltage pulse signal is converted to low pressure pulse width signal, it is characterised in that：Including rectification circuit, voltage stabilizing
Diode D1, constant-current source, optocoupler, resistance R3, the input of rectification circuit is ac high-voltage input, the output end of rectification circuit
Through voltage-regulator diode D1, constant-current source be connected to the input of optocoupler, the output end output low pressure pulse width signal of optocoupler, the pole of voltage stabilizing two
Pipe D1Negative electrode be connected with the output end of rectification circuit；Described resistance D3It is connected between DC source and optocoupler output.
2. the circuit that high-voltage pulse signal is converted to low pressure pulse width signal according to claim 1, it is characterised in that：Institute
The constant-current source stated includes resistance R1, resistance R2, metal-oxide-semiconductor Q1, triode Q2, resistance R5, voltage-regulator diode D2With electric capacity C2；Resistance R1
One end be connected to voltage-regulator diode D1Anode；Resistance R1The other end be connected with the drain electrode of metal-oxide-semiconductor, meanwhile, resistance R1It is another
One end and resistance R2One end connection；The source electrode of metal-oxide-semiconductor is connected with the input of optocoupler, grid and the resistance R of metal-oxide-semiconductor2It is another
End connection；Resistance R5One end be connected with the input of optocoupler, resistance R5The other end be connected to rectification circuit connect while connecing
Ground；Triode Q2Base stage be connected to the input of optocoupler and resistance R5Between, triode Q2Colelctor electrode and resistance R2It is another
One end connects, triode Q2Grounded emitter；Voltage-regulator diode D2It is connected in parallel on triode Q2Between, wherein, voltage-regulator diode D2
Negative electrode and resistance R2The other end connection；Electric capacity C2It is connected in parallel on voltage-regulator diode D2Between.
3. the circuit that high-voltage pulse signal is converted to low pressure pulse width signal according to claim 2, it is characterised in that：
Voltage-regulator diode D1With resistance R1Between be connected with resistance R4, resistance R4The other end ground connection.
4. the circuit that high-voltage pulse signal is converted to low pressure pulse width signal according to claim 1, it is characterised in that：
Electric capacity C is connected between optocoupler output1。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621234608.1U CN206260105U (en) | 2016-11-17 | 2016-11-17 | A kind of circuit that high-voltage pulse signal is converted to low pressure pulse width signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621234608.1U CN206260105U (en) | 2016-11-17 | 2016-11-17 | A kind of circuit that high-voltage pulse signal is converted to low pressure pulse width signal |
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| Publication Number | Publication Date |
|---|---|
| CN206260105U true CN206260105U (en) | 2017-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621234608.1U Active CN206260105U (en) | 2016-11-17 | 2016-11-17 | A kind of circuit that high-voltage pulse signal is converted to low pressure pulse width signal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108762365A (en) * | 2018-06-29 | 2018-11-06 | 赵明 | It is a kind of output isolation can PWM regulation and control constant-current source circuit |
| CN114925007A (en) * | 2022-06-09 | 2022-08-19 | 盈帜科技（常州）有限公司 | Signal conversion circuit |
-
2016
- 2016-11-17 CN CN201621234608.1U patent/CN206260105U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108762365A (en) * | 2018-06-29 | 2018-11-06 | 赵明 | It is a kind of output isolation can PWM regulation and control constant-current source circuit |
| CN108762365B (en) * | 2018-06-29 | 2023-07-04 | 赵明 | Output-isolated PWM-controllable constant current source circuit |
| CN114925007A (en) * | 2022-06-09 | 2022-08-19 | 盈帜科技（常州）有限公司 | Signal conversion circuit |
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