CN203072213U - A phase detecting circuit suitable for a single-stage flyback Leading edge and trailing edge phase-cut light adjusting power supply - Google Patents
A phase detecting circuit suitable for a single-stage flyback Leading edge and trailing edge phase-cut light adjusting power supply Download PDFInfo
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- CN203072213U CN203072213U CN2012207549317U CN201220754931U CN203072213U CN 203072213 U CN203072213 U CN 203072213U CN 2012207549317 U CN2012207549317 U CN 2012207549317U CN 201220754931 U CN201220754931 U CN 201220754931U CN 203072213 U CN203072213 U CN 203072213U
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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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
Provided is a phase detecting circuit suitable for a single-stage flyback Leading edge and trailing edge phase-cut light adjusting power supply. The light adjusting power supply comprises a power converting circuit. The power converting circuit comprises a single-stage flyback switch control circuit. The phase detecting circuit comprises a diode, a capacitor, and a voltage-regulator tube. The anode of the diode is electrically connected with the output end of the power converting circuit, while the cathode of the diode is connected with the anode of the capacitor. In addition, the anode of the capacitor is electrically connected with anode of the voltage-regulator tube. The cathode of the diode, the cathode of the capacitor, and the cathode of the voltage-regulator tube are connected with ground. Relatively, the phase detecting circuit requires a few electronic components. Therefore, while a corresponding function is achieved, a small size and thinness of a LED light adjusting power supply can be achieved because of the decrease in the number of the few electronic components and accord with the using demands of a user.
Description
Technical field
The utility model relates to a kind of electronic circuit, and particularly a kind of single-stage that is applicable to instead swashs the phase detecting circuit of front and back phase-cut dimming power supply.
Background technology
The LED illumination is progressively replacing conventional light source, as incandescent lamp, Halogen lamp LED etc., and these conventional light source can be used with a kind of dimmer, the brightness that makes incandescent lamp or Halogen lamp LED by secretly to bright or by bright to dark variation, if therefore the LED lamp also can be followed this dimmer compatibility, the user is replacing incandescent lamp with the LED lamp like this, during Halogen lamp LED, just needn't change simultaneously dimmer or and dimmer and LED lamp between connection line, thereby saving installation cost, the use habit that also more meets simultaneously the user, and traditional dimmers mainly contains following two types dimmer according to the difference of the electronic technology that adopts.A kind of is preceding phase shift dimmer, claims controllable silicon dimmer again, adopts bidirectional triode thyristor to control as electronic switch and opens or cut off the electricity supply to the power supply of load.Another kind is back phase shift dimmer, and it adopts field effect transistor or insulated gate bipolar triode to control as electronic switch and opens or cut off the electricity supply to the power supply of load.
Fig. 1 is a kind of circuit diagram of existing light modulation power supply, and the circuit shown in its frame of broken lines is the phase detecting circuit 1 in this circuit.Can see that drawing this phase detecting circuit 1 comprises a lot of electronic devices and components, cause the power volume of working it out very big, not meet modern frivolous trend, and be difficult in pcb board and arrange, therefore not only bad for attractive in appearance, but also increase human cost.
The utility model content
In view of this, be necessary to provide the few single-stage that is applicable to of a kind of electronic devices and components instead to swash the phase detecting circuit of front and back phase-cut dimming power supply.
A kind of single-stage that is applicable to instead swashs the phase detecting circuit of front and back phase-cut dimming power supply, and described light modulation power supply comprises a circuit for power conversion, and described circuit for power conversion comprises an anti-energizing switch control circuit of single-stage.Described phase detecting circuit comprises a diode, an electric capacity, and a voltage-stabiliser tube.The anode of described diode and the output of circuit for power conversion electrically connect, and negative electrode is connected with the positive pole of electric capacity, and the anodal while of electric capacity electrically connects the negative electrode of described diode, the negative pole of electric capacity, and the minus earth of voltage-stabiliser tube with the anode of voltage-stabiliser tube.
Compared with prior art, the needed electronic devices and components of phase detecting circuit provided by the utility model relatively seldom, when can reaching corresponding function, because the volume that the minimizing of electronic devices and components can make described LED light modulation power supply do is littler, more frivolous, more meet people's instructions for use.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is described, wherein:
Fig. 1 be a kind of LED lamp light modulation power supply of the prior art in the circuit theory diagrams of phase detecting circuit.
The circuit theory diagrams of a kind of LED light modulation power supply that Fig. 2 provides for the utility model.
Fig. 3 is that the single-stage that is applicable to that the LED light modulation power supply of Fig. 2 has instead swashs the circuit diagram of the phase detecting circuit of front and back phase-cut dimming power supply.
Fig. 4 is the comparison of wave shape figure that the circuit diagram of Fig. 3 is ordered at a point, b.
Fig. 5 is the waveform that the circuit diagram of Fig. 3 is ordered at a point, c.
Fig. 6 is the waveform that the circuit diagram of Fig. 3 is ordered at a point, d.
Fig. 7 is that the circuit diagram of Fig. 3 is at the comparison diagram of the output waveform of d point and arithmetic element.
Embodiment
Below based on accompanying drawing specific embodiment of the utility model is further elaborated.Should be appreciated that specific embodiment described herein only as embodiment, and be not used in restriction protection range of the present utility model.
See also Fig. 2, it is the circuit theory diagrams of a kind of LED light adjusting circuit 100 provided by the utility model.Described LED light adjusting circuit 100 comprises 10, one circuit for power conversion 11 that electrically connect with this dimmer 10 of a dimmer, and the phase detecting circuit 12 that circuit for power conversion 11 electrically connects.What can expect certainly is, is to be electrically connected on the output of brightness adjustment control output circuit 12 as the LED lamp (not shown) of load.What also need to further specify is, this LED light adjusting circuit 100 also comprises such as rectification circuit, filter circuit, and functional circuits such as DC/DC change-over circuit, arithmetic element such as single-chip microcomputer, to form a complete LED light adjusting circuit 100, but it belongs to prior art, in the present embodiment, does not do too much explanation.In the present embodiment, only operation principle and the built-up circuit of phase detecting circuit 12 described.Certainly this phase detecting circuit 12 can also be used in other occasions that is fit to, and is not limited to light adjusting circuit.
Described dimmer 10 is electronic light modulator, and it mainly acts on and is controlled rectification, to adjust the different brightness of light, namely by reducing or increase the light output of the varying strength that light that RMS voltage impels average power produces.Described dimmer 10 can be a kind of of phase dimmer or back phase shift dimmer that move forward.The phase shift dimmer is called controllable silicon or thyristor again before described, especially, adopts bidirectional triode thyristor to come opening and the power supply of cutting off the electricity supply to load of control circuit.Described back transposition dimmer adopts field effect transistor or insulated gate bipolar triode to be used as electronic switch and controls and lead the power supply of can or cut off the electricity supply to load.In the present embodiment, described dimmer 10 is bidirectional triode thyristor, and it is prior art, repeats no more.
Described circuit for power conversion 11 is used for high voltage direct current is converted into the low-voltage direct that is applicable to that the LED lamp is suitable for.For adapting with described phase detecting circuit 12, described circuit for power conversion 11 also comprises an anti-energizing switch control circuit 111 of single-stage, and it can instead swash high pfc circuit for a single-stage.The anti-energizing switch control circuit 111 of this single-stage is to provide energy at switch transistor T blocking interval transformer to output capacitor and load, and sense of current is single in the power supply process.Because the anti-energizing switch control circuit 111 of described single-stage is single-stages, make that waveform that a in the entire circuit orders is identical with the output waveform of dimmer 10, what change may only be the size of amplitude, we can say that also waveform that a is ordered and the output waveform of dimmer 10 are equal proportion convergent-divergents.Described circuit for power conversion 11 also comprises a transformer winding 112, and the input of this transformer winding 112 is opposite with the phase place of output, and the turn ratio of the corresponding line of amplitude and input and output resistance is proportional, thereby provides a suitable low-voltage for the LED lamp.
Whether described phase detecting circuit 12 is subjected to the influence that dimmer 10 is adjusted electric current for detection of the current waveform of described circuit for power conversion 114 outputs, or in order to change the brightness of LED lamp, whether described dimmer 10 is adjusted output current.When dimmer 10 reduces output voltage or increases output voltage, just need this phase detecting circuit 122 to detect the lifting of this output voltage, and should detected signal in being input to arithmetic element, after this arithmetic element is handled, output pulse signal is modulating the output current of described DC/DC change-over circuit, thereby the brightness that drives load LED lamp changes.As shown in Figure 3, described phase detecting circuit 12 comprises a diode D5,2, one voltage-stabiliser tube D7 of a capacitor C, and at least one impedance.The high level end of the output of the anode of described diode D5 and circuit for power conversion 11 electrically connects, and negative electrode is connected with the positive pole of capacitor C 2, and the anodal while of capacitor C 2 electrically connects with the anode of voltage-stabiliser tube D7.The negative pole of the negative electrode of described diode D5, capacitor C 2, and the low level end of the output of the negative electrode of voltage-stabiliser tube D7 and circuit for power conversion 11 electrically connects or ground connection.Described at least one impedance comprises four resistance R 1, R2, R3 and R4 in the present embodiment.Described resistance R 1 is connected between diode D5 and the capacitor C 2, resistance R 2 is connected in parallel between diode D5 and the capacitor C 2, resistance R 3 is connected between capacitor C 2 and the voltage-stabiliser tube D7, and resistance R 4 is connected between the high level output of voltage-stabiliser tube D7 and phase detecting circuit 12.The operation principle of this phase detecting circuit 12 is as described below.
As shown in Figure 4, oscillogram and the comparison of ordering at a point and b for circuit for power conversion 11, as can be seen after dimmer 10 is cut ripple, it still is 2 times of all-waves to the load rating frequency " steamed bun ripples " that a selects waveform, obviously, the waveform at this a point place can not directly be loaded on the load LED lamp, because LED lamp needs is constant-current supply.Because the Transformer Winding Lp1 of circuit for power conversion 11 is opposite with the Ls phase place, the input and output tie point of phase detecting circuit 12 and circuit for power conversion 11 is that b point waveform and a point waveform are with anti-phase.Simultaneously when the single-stage revertive control switching tube closed condition of circuit for power conversion 11, b point differs the high voltage of 0.7V for forward and with the output voltage of this phase detecting circuit 12.But, diode D5 isolates or has blocked the forward voltage that b is ordered, formed pulse when simultaneously capacitor C 2 has played the anti-energizing switch management and control of eliminating in the circuit for power conversion 11 of single-stage circuit 111 switches processed, thereby stablized the effect of c point voltage, thereby obtain the waveform that c is ordered, as shown in Figure 5, it is still with a point waveform similarity but anti-phase.Suppose that voltage-stabiliser tube D7 loop of living in is in when electrically disconnecting state, the voltage that R4, R3, the R2 voltage ratio by three resistance makes d order will be raised in proportion, i.e. Ud=Uc+Uout* (R1+R3)/(R1+R3+R4)
Wherein: Ud is the voltage at voltage-stabiliser tube two ends;
Uc is the voltage at electric capacity two ends when R3 disconnects;
Uout is the output voltage of described phase detecting circuit.
But because the existence of voltage-stabiliser tube D7, namely this voltage-stabiliser tube D7 loop of living in is in when electrically connecting, and this voltage-stabiliser tube D7 reverse-conducting makes that the voltage that surpasses voltage-stabiliser tube D7 two ends is the voltage stabilizing value that voltage that d is ordered is limited in voltage-stabiliser tube D7.And the voltage of ordering as b is when being negative sense, and this voltage-stabiliser tube D7 forward conduction, the output voltage of this phase detecting circuit 12 are that the forward voltage drop that voltage that d is ordered then is limited in voltage-stabiliser tube D7 is about about 0.7V, thereby obtain the waveform that d is ordered, as shown in Figure 6.Here " pact " refers to that this forward voltage drop has fluctuating, rather than an absolute constant value owing to the characteristic of circuit existence itself.As can be seen from the figure 6, through the effect of this phase detecting circuit 12, the waveform of output becomes square wave, namely becomes the needed phase angle of arithmetic element detection signal, thereby is beneficial to the adjustment conversion of subsequent conditioning circuit.Need to prove, because the anti-energizing switch control circuit 111 of single-stage of circuit for power conversion 11 is circuit of reversed excitation, it only is that phase place is opposite that the waveform that b is ordered is compared with the waveform that a is ordered, thereby can be so that the output signal of this phase detecting circuit 12 correctly reflects input and the output of circuit for power conversion 11, and then can accurately be adjusted the output signal of DC/DC change-over circuit by the pwm pulse signal of arithmetic element output.
Compared with prior art, phase detecting circuit 12 needed electronic devices and components provided by the utility model relatively seldom, when can reaching corresponding function, because the volume that the minimizing of electronic devices and components can make described LED light modulation power supply do is littler, more frivolous, more meet people's instructions for use.
The various parts that illustrated can encapsulate in any way.For example, comprise that the parts of single-chip microcomputer can be encapsulated in the single integrated circuit with other active and passive component, be encapsulated in one group of integrated circuit with other active and passive component that perhaps active and passive component is encapsulated in the upright circuit of a component with other.
The whole various circuit that illustrated can by arbitrarily or whole combinations interconnect use.
The parts of having discussed, step, benefit and advantage only are illustrative.They and relevant discussion thereof all are not intended to limit by any way protection range.Multiple other execution mode also can expect, comprise have still less, other and/or different parts, step, characteristic, benefit and and the execution mode of advantage.Described parts and step also can be arranged and sort by different modes.
Similar " be used for ... device " when comprising the structure and material that illustrated and their equivalent with in the claims the time.Similarly, phrase " be used for ... step " when comprising the behavior that has illustrated and be equal to behavior with in the claims the time.There are not these phrases to mean that then this claim is not limited to arbitrarily corresponding structure, material or behavior or its equivalents.
The content of having stated or having illustrated is not intended to make arbitrarily parts, step, characteristic, target, benefit, advantage or is proprietary for the content that the public is equal to, and whether this and they are mentioned irrelevant in the claims.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all interior any modifications of doing in spirit of the present utility model and principle, be equal to and replace and improvement etc., all should be included in protection range of the present utility model in.
Claims (9)
1. one kind is applicable to that single-stage instead swashs the phase detecting circuit of front and back phase-cut dimming power supply, described light modulation power supply comprises a circuit for power conversion, described circuit for power conversion comprises an anti-energizing switch control circuit of single-stage, it is characterized in that: described phase detecting circuit comprises a diode, an electric capacity, and voltage-stabiliser tube, the anode of described diode and the output of circuit for power conversion electrically connect, negative electrode is connected with the positive pole of electric capacity, the anodal while of electric capacity electrically connects with the anode of voltage-stabiliser tube, the negative electrode of described diode, the negative pole of electric capacity, and the minus earth of voltage-stabiliser tube.
2. the single-stage that is applicable to as claimed in claim 1 instead swashs the phase detecting circuit of front and back phase-cut dimming power supply, it is characterized in that: described phase detecting circuit comprises four resistance, between resistance R 1 series diode and the electric capacity, a resistance R 2 is connected in parallel between diode and the electric capacity, a resistance R 3 is connected between electric capacity and the voltage-stabiliser tube, and a resistance R 4 is connected between voltage-stabiliser tube and the load.
3. the single-stage that is applicable to as claimed in claim 2 instead swashs the phase detecting circuit of front and back phase-cut dimming power supply, it is characterized in that: when described voltage-stabiliser tube loop of living in is in when electrically disconnecting state, the relation of the magnitude of voltage at these voltage-stabiliser tube two ends and described four resistance is as follows:
Ud＝Uc+Uout*(R1+R3)/(R1+R3+R4)
Wherein: Ud is the pressure drop at voltage-stabiliser tube two ends;
Uc is the pressure drop at electric capacity two ends when disconnecting at resistance R 3 places;
Uout is the output pressure drop of described phase detecting circuit.
4. the single-stage that is applicable to as claimed in claim 1 instead swashs the phase detecting circuit of front and back phase-cut dimming power supply, it is characterized in that: when described voltage-stabiliser tube loop of living in was in electric connection, the forward voltage drop at this voltage-stabiliser tube reverse-conducting and two ends equaled the specified voltage stabilizing value of this voltage-stabiliser tube.
5. the single-stage that is applicable to as claimed in claim 1 instead swashs the phase detecting circuit of front and back phase-cut dimming power supply, and it is characterized in that: when described voltage-stabiliser tube loop of living in was in electric connection, the negative sense pressure drop at this voltage-stabiliser tube forward conduction and two ends was about 0.7V.
6. the single-stage that is applicable to as claimed in claim 1 instead swashs the phase detecting circuit of front and back phase-cut dimming power supply, and it is characterized in that: described light modulation power supply comprises an arithmetic element.
As claimed in claim 6 be applicable to single-stage instead swash before and after the phase detecting circuit of phase-cut dimming power supply, it is characterized in that: described arithmetic element is a single-chip microcomputer, its according to the output signal of described voltage-stabiliser tube to export specified impulse wave.
8. the single-stage that is applicable to as claimed in claim 1 instead swashs the phase detecting circuit of front and back phase-cut dimming power supply, it is characterized in that: the anti-energizing switch control circuit of described single-stage is that single-stage instead swashs high pfc circuit.
9. the single-stage that is applicable to as claimed in claim 1 instead swashs the phase detecting circuit of front and back phase-cut dimming power supply, it is characterized in that: described circuit for power conversion comprises a transformer winding, the input of this transformer winding is opposite with the phase place of output, and the turn ratio of the corresponding line resistance of amplitude and input and output is proportional.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207549317U CN203072213U (en) | 2012-12-15 | 2012-12-15 | A phase detecting circuit suitable for a single-stage flyback Leading edge and trailing edge phase-cut light adjusting power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207549317U CN203072213U (en) | 2012-12-15 | 2012-12-15 | A phase detecting circuit suitable for a single-stage flyback Leading edge and trailing edge phase-cut light adjusting power supply |
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| Publication Number | Publication Date |
|---|---|
| CN203072213U true CN203072213U (en) | 2013-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012207549317U Expired - Fee Related CN203072213U (en) | 2012-12-15 | 2012-12-15 | A phase detecting circuit suitable for a single-stage flyback Leading edge and trailing edge phase-cut light adjusting power supply |
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| CN (1) | CN203072213U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869160A (en) * | 2012-12-15 | 2014-06-18 | 林万炯 | Phase detection circuit suitable for single-phase flyback front and back phase cutting dimming power supply |
| CN104535854A (en) * | 2014-06-13 | 2015-04-22 | 成都芯源系统有限公司 | LED driving device, controller thereof and dimming mode detection method |
| CN105491758A (en) * | 2015-12-11 | 2016-04-13 | 中山市尊宝实业有限公司 | New energy-efficiency standard energy-saving circuit with high power factor and ultra-low stand-by power consumption |
-
2012
- 2012-12-15 CN CN2012207549317U patent/CN203072213U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869160A (en) * | 2012-12-15 | 2014-06-18 | 林万炯 | Phase detection circuit suitable for single-phase flyback front and back phase cutting dimming power supply |
| CN103869160B (en) * | 2012-12-15 | 2017-08-11 | 赛尔富电子有限公司 | A kind of phase detecting circuit suitable for phase-cut dimming power supply before and after single-stage flyback |
| CN104535854A (en) * | 2014-06-13 | 2015-04-22 | 成都芯源系统有限公司 | LED driving device, controller thereof and dimming mode detection method |
| CN104535854B (en) * | 2014-06-13 | 2017-07-14 | 成都芯源系统有限公司 | LED driving device, controller thereof and dimming mode detection method |
| CN105491758A (en) * | 2015-12-11 | 2016-04-13 | 中山市尊宝实业有限公司 | New energy-efficiency standard energy-saving circuit with high power factor and ultra-low stand-by power consumption |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NINGBO HI. TECH. PARK SELF ELECTRONICS CO., LTD. Free format text: FORMER OWNER: LIN WANJIONG Effective date: 20140423 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20140423 Address after: The national high tech Zone Juxian 315103 Ningbo Road, Zhejiang province No. 1345 Patentee after: SELF ELECTRONICS CO.,LTD. Address before: The national high tech Zone Juxian 315103 Ningbo Road, Zhejiang province No. 1345 Ningbo Purcell Electronics Ltd. Patentee before: Lin Wanjiong |
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| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: The national high tech Zone Juxian 315103 Ningbo Road, Zhejiang province No. 1345 Patentee after: SELF ELECTRONICS CO., LTD. Address before: The national high tech Zone Juxian 315103 Ningbo Road, Zhejiang province No. 1345 Patentee before: SELF ELECTRONICS CO.,LTD. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20171215 |
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| CF01 | Termination of patent right due to non-payment of annual fee |