CN201830511U - High-frequency electronic transformer for low-voltage high-power light emitting diode (LED) spot lamp - Google Patents
High-frequency electronic transformer for low-voltage high-power light emitting diode (LED) spot lamp Download PDFInfo
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- CN201830511U CN201830511U CN 201020518748 CN201020518748U CN201830511U CN 201830511 U CN201830511 U CN 201830511U CN 201020518748 CN201020518748 CN 201020518748 CN 201020518748 U CN201020518748 U CN 201020518748U CN 201830511 U CN201830511 U CN 201830511U
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Abstract
The utility model discloses a high-frequency electronic transformer for a low-voltage high-power light emitting diode (LED) spot lamp, which comprises a voltage excitation half-bridge converter module and an output module which are connected, wherein the voltage excitation half-bridge converter module comprises a starting circuit, a voltage excitation half-bridge converter circuit and a damping circuit which are sequentially coupled; the starting circuit generates starting voltage for triggering the voltage excitation half-bridge converter circuit to start; the voltage excitation half-bridge converter circuit maintains the output voltage value and inputs the output voltage to the damping circuit; and the damping circuit absorbs the peak reverse voltage generated by the voltage excitation half-bridge converter circuit and outputs the peak reverse voltage to the output module. The high-frequency electronic transformer adopting the voltage excitation mode can stably output and maintain the voltage and can avoid the phenomenon that the output voltage is reduced even no voltage generates because the load does not exist or the load current is extremely-low.
Description
Technical field
The utility model belongs to LED (light-emitting diode) field, particularly, relate to a kind of low-pressure high-power LED shot-light high-frequency electronic transformer, particularly a kind of adopt the voltage drive mode and for the matching used high-frequency electronic transformer of low-pressure high-power LED shot-light.
Background technology
Present existing low-pressure high-power LED shot-light generally all adopts industrial frequency AC low pressure 12V as operating voltage, because industrial frequency AC 12V operating voltage can not effectively compatiblely adopt the high-frequency ac 12V of conditional electronic transformer output as working power.At present, all to adopt the interchange 12V of iron core formula inductive transformer output be low-pressure high-power LED shot-light (MR16) power supply to low-pressure high-power LED shot-light (mainly referring to MR16 type LED lamp).Being inevitable from development trend consideration, its directly alternative traditional low pressure halogen tungsten spot lamp of low-pressure high-power LED shot-light, also is the market opportunity that following LED lamp substitutes the conventional light source lamp.Rarely found employing conditional electronic transformer is the power supply of low-pressure high-power LED shot-light in existing the application, because conditional electronic transformer adopting current excitation mode, when the non-loaded or load current of output is less than normal, this moment, the output no-voltage or the voltage of transformer were very low, be lower than the minimum (being generally about 6V) of low-pressure high-power LED shot-light, this moment is when inserting lamp, will inevitably flashing light, and this does not allow.The loss of iron core formula inductive transformer is big, efficient is low, be low-pressure high-power LED shot-light power supply, can directly influence the energy-saving effect of LED shot-light.Still do not have at present technology maturation, stability of characteristics, cost low can guarantee to export non-loaded or load current when less than normal its output voltage be not less than 12V, and behind the access lamp not the electronic transformer of flashing light go on the market, the supporting use case that then is applied to low-pressure high-power LED shot-light more is difficult to find track.
Summary of the invention
In view of this, technical problem to be solved in the utility model provided a kind of adopt the voltage drive mode and for the matching used high-frequency electronic transformer of low-pressure high-power LED shot-light, directly substitute and adopt of the low-pressure high-power LED shot-light use of iron core formula inductive transformer as the input power supply.
In order to solve the problems of the technologies described above, the utility model discloses a kind of low-pressure high-power light-emitting diode (LED) shot-light high-frequency electronic transformer, comprise: the voltage drive semi-bridge inversion module and the output module that link to each other, wherein, described voltage drive semi-bridge inversion module, also comprise: the start-up circuit that couples successively, voltage drive half-bridge inversion circuit and antihunt circuit, described start-up circuit produces and triggers the starting resistor that described voltage drive half-bridge inversion circuit starts, described voltage drive half-bridge inversion circuit keeps the magnitude of voltage exported and described output voltage is inputed to described antihunt circuit, and described antihunt circuit exports described output module to after absorbing the inverse peak voltage that described voltage drive half-bridge inversion circuit produces.
Further; described voltage drive semi-bridge inversion module; also comprise: current foldback circuit; link to each other with described antihunt circuit, voltage drive half-bridge inversion circuit; wherein, current foldback circuit is short-circuited or the current potential that drags down described voltage drive half-bridge inversion circuit during overburden forces it to close in the output of described antihunt circuit.
Further, described output module, comprise: the LC series resonance charge-discharge circuit that links to each other and voltage output and amplitude limiter circuit, wherein, described LC series resonance charge-discharge circuit receives and carries out resonance after the output signal of described voltage drive semi-bridge inversion module and discharge and recharge, and triggers described voltage output and amplitude limiter circuit and produces output voltage and export behind the spike of level and smooth described output voltage.
Further, described output module also comprises: anti-jamming circuit, link to each other with described voltage output and amplitude limiter circuit, wherein, described voltage output and amplitude limiter circuit output voltage are to described anti-jamming circuit, and described anti-jamming circuit improves the final output in back to the noiseproof feature of output voltage.
Further, described output module, comprise: resonance transformer (T), the 6th electric capacity (C6), the 7th electric capacity (C7), the 8th electric capacity (C8), safety electric capacity (CY) and the 8th resistance (R8), wherein, the tail end (4) of the elementary winding (n2) of resonance transformer (T) and the 6th electric capacity (C6), the common joint end of the 7th electric capacity (C7) connects, the other end of the 6th electric capacity (C6) is electrically connected with positive direct-current, the other end of the 7th electric capacity (C7) is connected with negative direct current, the head end (7) of the output winding (n4) of resonance transformer (T) connects the 8th electric capacity (C8) end, the 8th electric capacity (C8) other end is connected with the tail end (6) of the output winding (n4) of resonance transformer (T) by the 8th resistance (R8), also and by safety electric capacity (CY) is connected to negative direct current.
Further, the elementary winding (n2) of resonance transformer (T), the 6th electric capacity (C6), the 7th electric capacity (C7) are formed described LC series resonance charge-discharge circuit; The output winding (n4) of resonance transformer (T), the 8th electric capacity (C8), the 8th resistance (R8) are formed described voltage output and amplitude limiter circuit; Safety electric capacity (CY) is formed described anti-jamming circuit.
Further, described voltage drive semi-bridge inversion module, comprise: first switch triode (Q1), second switch triode (Q2), the 3rd electric capacity (C3), the 4th electric capacity (C4), the 5th electric capacity (C5), first resistance (R1), second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7), first switching diode (D1), second switch diode (D2), the 3rd switching diode (D3), the 4th switching diode (D4), the 5th switching diode (D5), and one-way SCR (SCR), wherein, first resistance (R1) respectively with positive direct-current, the base stage of first switch triode (Q1), the negative pole of first switching diode (D1), the 4th resistance (R4) is connected with the common joint end of the 6th resistance (R6), the 6th resistance (R6) other end also links to each other with the anode of one-way SCR (SCR), the negative electrode of one-way SCR (SCR) is connected to negative direct current, the 4th resistance (R4) other end is connected to the tail end (5) of the second auxiliary winding (n3) of resonance transformer (T) by the 3rd electric capacity (C3), the head end (1) of the second auxiliary winding (n3) with after the head end (1) of elementary winding (n2) is connected also with the emitter of first switch triode (Q1), the collector electrode of second switch triode (Q2) connects, the 5th resistance (R5) end connects negative direct current, the 5th resistance (R5) other end is connected to the head end (2) of the first auxiliary winding (n1) of resonance transformer (T) by the 4th electric capacity (C4), the tail end (3) of the first auxiliary winding (n1) is connected to the base stage of second switch triode (Q2), the 4th switching diode (D4) oppositely is connected between the collector electrode and emitter of second switch triode (Q2), and the 5th switching diode (D5) oppositely is connected between the collector electrode and emitter of first switch triode (Q1); The positive pole of first switching diode (D1) and second resistance (R2) end, the emitter of first switch triode (Q1), the collector electrode of second switch triode (Q2) links to each other, the other end of the base stage of second switch triode (Q2) and second resistance (R2), the negative pole of second switch diode (D2) links to each other, the collector electrode of first switch triode (Q1) connects positive direct-current, the emitter of second switch triode (Q2) is connected to negative direct current by the 3rd resistance (R3), the positive pole of second switch diode (D2) is connected to negative direct current, the positive pole of the 3rd switching diode (D3) connects the emitter of second switch triode (Q2), the negative pole of the 3rd switching diode (D3) is connected with the 7th resistance (R7) end, one end of the 7th resistance (R7) other end and the 5th electric capacity (C5), the control utmost point of one-way SCR (SCR) connects, and the other end of the 5th electric capacity (C5) is connected to negative direct current.
Further, first resistance (R1), second resistance (R2), first switching diode (D1), second switch diode (D2) are formed described start-up circuit, when the voltage drop at first resistance (R1) two ends reaches the cut-in voltage of first switch triode (Q1), first switch triode (Q1) conducting; First switch triode (Q1), second switch triode (Q2), the 3rd resistance (R3), the 4th resistance (R4), the 5th resistance (R5), the 3rd electric capacity (C3), the 4th electric capacity (C4) is formed described voltage drive half-bridge inversion circuit, when first switch triode (Q1) conducting, pass through the elementary winding (n2) and the 6th electric capacity (C6) of resonance transformer (T), the 7th electric capacity (C7) forms the electromagnetism charge and discharge process of LC series resonance, discharges and recharges the first auxiliary winding (n1) of cycle moment resonance transformer (T) at each, two phase places of induction generation are opposite successively in the second auxiliary winding (n3), the voltage excitation signals that voltage amplitude is identical is passed through the 4th resistance (R4), the 5th resistance (R5), the 3rd electric capacity (C3), the 4th electric capacity (C4) is to drive first switch triode (Q1), second switch triode (Q2) alternate conduction with end; The 3rd resistance (R3), the 6th resistance (R6), the 7th resistance (R7), the 5th electric capacity (C5), the 3rd switching diode (D3), one-way SCR (SCR) are formed described circuit overcurrent protection, when the output short-circuit of described antihunt circuit or overburden, make it open-minded by the control utmost point that is injected into one-way SCR (SCR) behind the 3rd switching diode (D3), the 7th resistance (R7), the 5th electric capacity (C5) smothing filtering, the base potential of first switch triode (Q1) is pulled low to closes; The 4th switching diode (D4), the 5th switching diode (D5) are formed described antihunt circuit, absorb the inverse peak voltage that produces in first switch triode (Q1), (Q2) conducting of second switch triode and the procedures of turn-off.
Further, also comprise: the rectification filtering module that links to each other with described voltage drive semi-bridge inversion module, comprise: fuse (FU), first electric capacity (C1), second electric capacity (C2), piezo-resistance (VR), differential mode inductance (L) and rectifier bridge heap (BR), wherein, first electric capacity (C1) termination zero line, the other end of going into AC power is connected with the phase line of AC power by fuse (FU); Differential mode inductance (L) end is connected with the phase line of AC power by fuse (FU), also be connected with the zero line of AC power by first electric capacity (C1), differential mode inductance (L) other end respectively with piezo-resistance (VR) end, the pin (1) of rectifier bridge heap (BR) connects, piezo-resistance (VR) other end is piled the pin (3) of (BR) respectively with rectifier bridge, the zero line of AC power links to each other, the pin (4) of rectifier bridge heap (BR) joins with second electric capacity (C2) end, the pin (2) of rectifier bridge heap (BR) joins with second electric capacity (C2) other end, the positive direct-current of pin (2) output ripple of rectifier bridge heap (BR), direct current is born in pin (4) output of rectifier bridge heap (BR), exports the start-up circuit of described voltage drive semi-bridge inversion module to.
Compare the technique effect that the utility model obtained with existing scheme:
Adopt the high-frequency electronic transformer output voltage and the maintenance stably of voltage drive mode, and can not reduce even no-voltage because of non-loaded or the load current output voltage that causes less than normal, it has reasonable in design, advantages such as circuit structure simple, stability of characteristics, reliability height, long service life, can directly substitute to adopt iron core formula inductive transformer to use as the low-pressure high-power LED shot-light of input power supply.
Description of drawings
Fig. 1 is the functional-block diagram of high-frequency electronic transformer of the present utility model;
Fig. 2 is the circuit theory diagrams of high-frequency electronic transformer of the present utility model;
Fig. 3 is the functional-block diagram of voltage drive semi-bridge inversion module of the present utility model;
Fig. 4 is the functional-block diagram of output module of the present utility model.
Wherein, frame of broken lines in the accompanying drawing 2 (1) is conventional filter rectifier, and the schematic diagram that contains fuse FU, differential mode inductance L, rectifier bridge heap BR, piezo-resistance and other capacitance group one-tenth is as the utility model embodiment one;
Frame of broken lines in the accompanying drawing 2 (2) is a voltage drive semi-bridge inversion module, contains switch triode Q1, Q2, switching diode, reaches other resistance, and the schematic diagram that electric capacity is formed is as the utility model embodiment two;
Frame of broken lines in the accompanying drawing 2 (3) is an output module, contains resonance transformer T, reaches other resistance, and the schematic diagram that electric capacity is formed is as the utility model embodiment three.
Embodiment
Below will cooperate graphic and embodiment describes execution mode of the present utility model in detail, by this to the utility model how the application technology means implementation procedure that solves technical problem and reach the technology effect can fully understand and implement according to this.
Core idea of the present utility model is: the mode by the voltage drive semi-bridge inversion produces output voltage and maintenance, can not reduce because of non-loaded or the load current output voltage that causes less than normal; Working voltage excitation semi-bridge inversion module in the high-frequency electronic transformer, comprise: the start-up circuit that couples successively, voltage drive half-bridge inversion circuit and antihunt circuit, described start-up circuit produces and triggers the starting resistor that described voltage drive half-bridge inversion circuit starts, described voltage drive half-bridge inversion circuit keeps the magnitude of voltage exported and described output voltage is inputed to described antihunt circuit, and described antihunt circuit exports described output module to after absorbing the inverse peak voltage that described voltage drive half-bridge inversion circuit produces.
The voltage-type high-frequency electronic transformer of the utility model design as shown in Figure 1, comprises rectification filtering module 1, voltage drive semi-bridge inversion module 2, output module 3 compositions.220 volts of alternating currents of input 4 input power frequencies of rectification filtering module 1, the output 5 of output module 3 connects load.
Referring among Fig. 2 shown in (1), described rectification filtering module 1 is made of a kind of current rectifying and wave filtering circuit of routine jointly fuse FU, capacitor C 1, capacitor C 2, piezo-resistance VR, differential mode inductance L, rectifier bridge heap BR.AC power (N) end is input.
Circuit connecting relation is as described below:
Differential mode inductance L one end is connected with AC power (L) end, is connected with AC power (N) end by capacitor C 1 by fuse FU respectively, the differential mode inductance L other end is connected with the pin 1 of piezo-resistance VR one end, rectifier bridge heap BR respectively, the piezo-resistance VR other end links to each other with pin 3, AC power (N) end of rectifier bridge heap BR respectively, the pin 4 of rectifier bridge heap BR joins with capacitor C 2 one ends, the pin 2 of rectifier bridge heap BR joins with capacitor C 2 other ends, the positive direct-current electricity (V+) of pin 2 output ripples of rectifier bridge heap BR, the negative direct current (GND) of pin 4 outputs.
Circuit working is described below:
As shown in Figure 2,220 volts of alternating-current power supplies of input power frequency are inserted by port (L), (N) (elementary Pin) respectively, capacitor C 1, inductance L are formed Γ type differential mode filter, piezo-resistance VR is connected in the AC power two ends after by differential mode inductance L, and the effect of its connection is to obtain preferably to resist the ability of forceful electric power pulse.The positive direct-current electricity (V+) of pin 2 output ripples of rectifier bridge heap BR, the negative direct current (GND) of pin 4 outputs.
The functional-block diagram of described voltage drive semi-bridge inversion module 2; as shown in Figure 3; comprise: start-up circuit 21; voltage drive half-bridge inversion circuit 22; antihunt circuit 23 and current foldback circuit 24; wherein; start-up circuit 21 produces starting resistor input voltage excitation half-bridge inversion circuit 22; the magnitude of voltage that 22 maintenances of voltage drive half-bridge inversion circuit are exported; and described output voltage inputed to antihunt circuit 23; export output module 3 and current foldback circuit 24 to behind the inverse peak voltage by 22 generations of antihunt circuit 23 absorption voltage drive half-bridge inversion circuits, current foldback circuit 24 drags down described voltage drive half-bridge inversion circuit 22 when output short-circuit or overburden current potential forces it to close to play the effect of protection.
Below at above-mentioned principle, in conjunction with an application example voltage drive semi-bridge inversion module 2 is described.
Referring among Fig. 2 shown in (2), described voltage drive semi-bridge inversion module 2 is by switch triode Q1, switch triode Q2, and capacitor C 3, capacitor C 4, capacitor C 5, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, switching diode D1, switching diode D2, switching diode D3, switching diode D4, switching diode D5, unidirectional controllable silicon S CR form jointly.
Circuit connecting relation is as described below:
Anodal and resistance R 2 one ends of switching diode D1, the emitter of switch triode Q1, the collector electrode of Q2 links to each other, the other end of the base stage of switch triode Q2 and resistance R 2, the negative pole of switching diode D2 links to each other, the collector electrode of switch triode Q1 connects positive direct-current electricity (V+), the emitter of switch triode Q2 is connected to negative direct current (GND) by resistance R 3, the positive pole of switching diode D2 is connected to negative direct current (GND), the positive pole of switching diode D3 connects the emitter of switch triode Q2, the negative pole of switching diode D3 is connected with resistance R 7 one ends, one end of resistance R 7 other ends and capacitor C 5, the control utmost point of controllable silicon SCR connects, and another termination of capacitor C 5 is born direct current (GND).
Circuit working is described below:
As shown in Figure 2, resistance R 1, R2, switching diode D1, D2 form start-up circuit, when the voltage drop at resistance R 1 two ends reaches the switch triode cut-in voltage, and the Q1 conducting.Switch triode Q1, Q2, resistance R 3, R4, R5, capacitor C 3, C4 forms the voltage drive half-bridge inversion circuit, pass through elementary winding n2 and the capacitor C 6 of resonance transformer T when the conducting effect of Q1, C7 forms the electromagnetism charge and discharge process of LC series resonance, auxiliary winding n1 at moment one-period (being about 30 μ s/33KHz in the present embodiment) resonance transformer T, two phase places of induction generation are opposite successively among the n3, the voltage excitation signals that voltage amplitude is identical is passed through resistance R 4, R5, capacitor C 3, C4 driving switch triode Q1, the Q2 alternate conduction with end, whether export no matter load this moment, and output voltage all keeps.Resistance R 3, R6, R7, capacitor C 5, switching diode D3, controllable silicon SCR are formed circuit overcurrent protection; when output short-circuit or overburden; the voltage drop at resistance R 3 two ends uprises; by being injected into the control utmost point of controllable silicon SCR behind switching diode D3, resistance R 7, capacitor C 5 smothing filterings; make it open-minded; the base potential of switch triode Q1 dragged down force it to close, thereby play the effect of protection.Switching diode D4, D5 form antihunt circuit, its role is to absorb the inverse peak voltage that produces in switch triode Q1, the Q2 switching process, with this it are protected.
The functional-block diagram of described output module 3, as shown in Figure 4, comprise: the LC series resonance charge-discharge circuit 31 of Xiang Lianing, voltage are exported and amplitude limiter circuit 32 and anti-jamming circuit 33 successively, wherein, LC series resonance charge-discharge circuit 31 receives the output signal of voltage drive semi-bridge inversion module 2, carrying out resonance discharges and recharges, trigger voltage output and amplitude limiter circuit 32 produce output voltage and output to described anti-jamming circuit 33 behind the spikes of level and smooth described output voltage, and the noiseproof feature of the differential mode voltage of 33 pairs of outputs of described anti-jamming circuit is improved the final output in back.
Below at above-mentioned principle, in conjunction with an application example output module 3 is described.
Referring among Fig. 2 shown in (3), described output module 3 is made of jointly resonance transformer T, capacitor C 6, capacitor C 7, capacitor C 8, safety capacitor C Y, resistance R 8.Resonance transformer T comprises: elementary winding n2 (head end 1, tail end 4), auxiliary winding n1 (head end 2, tail end 3), n3 (head end 1, tail end 5) and output winding n4 (head end 7, tail end 6).
Circuit connecting relation is as described below:
N2 winding 4 ends of resonance transformer T are connected with the common joint end of capacitor C 6, C7, the other end of capacitor C 6 is connected with positive direct-current electricity (V+), the other end of capacitor C 7 is connected with negative direct current (GND), n4 winding 7 ends of resonance transformer T connect capacitor C 8 one ends, capacitor C 8 other ends are connected with n4 winding 6 ends of resonance transformer T by resistance R 8, and are connected to negative direct current (GND) by safety capacitor C Y.
Circuit working is described below:
As shown in Figure 2, the elementary winding n2 of resonance transformer T, capacitor C 6, C7 form LC series resonance charge-discharge circuit, by the circuit relationships cooperating of (2) among Fig. 2, belong to the part of output module.The output winding n4 of resonance transformer T is voltage output end (secondary SEC).Capacitor C 8, resistance R 8 are formed amplitude limiter circuit, its role is to the spike of smooth output voltage.The effect of safety capacitor C Y is to improve the noiseproof feature of transformer differential mode voltage.
Above-mentioned explanation illustrates and has described some preferred embodiments of the present utility model, but as previously mentioned, be to be understood that the utility model is not limited to the disclosed form of this paper, should not regard eliminating as to other embodiment, and can be used for various other combinations, modification and environment, and can in utility model contemplated scope described herein, change by the technology or the knowledge of above-mentioned instruction or association area.And change that those skilled in the art carried out and variation do not break away from spirit and scope of the present utility model, then all should be in the protection range of the utility model claims.
Claims (9)
1. a low-pressure high-power light-emitting diode (LED) shot-light high-frequency electronic transformer, it is characterized in that, comprise: the voltage drive semi-bridge inversion module and the output module that link to each other, wherein, described voltage drive semi-bridge inversion module, also comprise: the start-up circuit that couples successively, voltage drive half-bridge inversion circuit and antihunt circuit, described start-up circuit produces and triggers the starting resistor that described voltage drive half-bridge inversion circuit starts, described voltage drive half-bridge inversion circuit keeps the magnitude of voltage exported and described output voltage is inputed to described antihunt circuit, and described antihunt circuit exports described output module to after absorbing the inverse peak voltage that described voltage drive half-bridge inversion circuit produces.
2. low-pressure high-power LED shot-light high-frequency electronic transformer as claimed in claim 1; it is characterized in that; described voltage drive semi-bridge inversion module; also comprise: current foldback circuit; link to each other with described antihunt circuit, voltage drive half-bridge inversion circuit; wherein, current foldback circuit is short-circuited or the current potential that drags down described voltage drive half-bridge inversion circuit during overburden forces it to close in the output of described antihunt circuit.
3. low-pressure high-power LED shot-light high-frequency electronic transformer as claimed in claim 2, it is characterized in that, described output module, comprise: the LC series resonance charge-discharge circuit that links to each other and voltage output and amplitude limiter circuit, wherein, described LC series resonance charge-discharge circuit receives and carries out resonance after the output signal of described voltage drive semi-bridge inversion module and discharge and recharge, and triggers described voltage output and amplitude limiter circuit and produces output voltage and export behind the spike of level and smooth described output voltage.
4. low-pressure high-power LED shot-light high-frequency electronic transformer as claimed in claim 3, it is characterized in that, described output module, also comprise: anti-jamming circuit, link to each other with described voltage output and amplitude limiter circuit, wherein, described voltage output and amplitude limiter circuit output voltage are to described anti-jamming circuit, and described anti-jamming circuit improves the final output in back to the noiseproof feature of output voltage.
5. low-pressure high-power LED shot-light high-frequency electronic transformer as claimed in claim 4, it is characterized in that, described output module, comprise: resonance transformer (T), the 6th electric capacity (C6), the 7th electric capacity (C7), the 8th electric capacity (C8), safety electric capacity (CY) and the 8th resistance (R8), wherein, the tail end (4) of the elementary winding (n2) of resonance transformer (T) and the 6th electric capacity (C6), the common joint end of the 7th electric capacity (C7) connects, the other end of the 6th electric capacity (C6) is electrically connected with positive direct-current, the other end of the 7th electric capacity (C7) is connected with negative direct current, the head end (7) of the output winding (n4) of resonance transformer (T) connects the 8th electric capacity (C8) end, the 8th electric capacity (C8) other end is connected with the tail end (6) of the output winding (n4) of resonance transformer (T) by the 8th resistance (R8), also and by safety electric capacity (CY) is connected to negative direct current.
6. low-pressure high-power LED shot-light high-frequency electronic transformer as claimed in claim 5 is characterized in that, the elementary winding (n2) of resonance transformer (T), the 6th electric capacity (C6), the 7th electric capacity (C7) are formed described LC series resonance charge-discharge circuit; The output winding (n4) of resonance transformer (T), the 8th electric capacity (C8), the 8th resistance (R8) are formed described voltage output and amplitude limiter circuit; Safety electric capacity (CY) is formed described anti-jamming circuit.
7. as claim 5 or 6 described low-pressure high-power LED shot-light high-frequency electronic transformers, it is characterized in that, described voltage drive semi-bridge inversion module, comprise: first switch triode (Q1), second switch triode (Q2), the 3rd electric capacity (C3), the 4th electric capacity (C4), the 5th electric capacity (C5), first resistance (R1), second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7), first switching diode (D1), second switch diode (D2), the 3rd switching diode (D3), the 4th switching diode (D4), the 5th switching diode (D5), and one-way SCR (SCR), wherein, first resistance (R1) respectively with positive direct-current, the base stage of first switch triode (Q1), the negative pole of first switching diode (D1), the 4th resistance (R4) is connected with the common joint end of the 6th resistance (R6), the 6th resistance (R6) other end also links to each other with the anode of one-way SCR (SCR), the negative electrode of one-way SCR (SCR) is connected to negative direct current, the 4th resistance (R4) other end is connected to the tail end (5) of the second auxiliary winding (n3) of resonance transformer (T) by the 3rd electric capacity (C3), the head end (1) of the second auxiliary winding (n3) with after the head end (1) of elementary winding (n2) is connected also with the emitter of first switch triode (Q1), the collector electrode of second switch triode (Q2) connects, the 5th resistance (R5) end connects negative direct current, the 5th resistance (R5) other end is connected to the head end (2) of the first auxiliary winding (n1) of resonance transformer (T) by the 4th electric capacity (C4), the tail end (3) of the first auxiliary winding (n1) is connected to the base stage of second switch triode (Q2), the 4th switching diode (D4) oppositely is connected between the collector electrode and emitter of second switch triode (Q2), and the 5th switching diode (D5) oppositely is connected between the collector electrode and emitter of first switch triode (Q1); The positive pole of first switching diode (D1) and second resistance (R2) end, the emitter of first switch triode (Q1), the collector electrode of second switch triode (Q2) links to each other, the other end of the base stage of second switch triode (Q2) and second resistance (R2), the negative pole of second switch diode (D2) links to each other, the collector electrode of first switch triode (Q1) connects positive direct-current, the emitter of second switch triode (Q2) is connected to negative direct current by the 3rd resistance (R3), the positive pole of second switch diode (D2) is connected to negative direct current, the positive pole of the 3rd switching diode (D3) connects the emitter of second switch triode (Q2), the negative pole of the 3rd switching diode (D3) is connected with the 7th resistance (R7) end, one end of the 7th resistance (R7) other end and the 5th electric capacity (C5), the control utmost point of one-way SCR (SCR) connects, and the other end of the 5th electric capacity (C5) is connected to negative direct current.
8. low-pressure high-power LED shot-light high-frequency electronic transformer as claimed in claim 7, it is characterized in that, first resistance (R1), second resistance (R2), first switching diode (D1), second switch diode (D2) are formed described start-up circuit, when the voltage drop at first resistance (R1) two ends reaches the cut-in voltage of first switch triode (Q1), first switch triode (Q1) conducting; First switch triode (Q1), second switch triode (Q2), the 3rd resistance (R3), the 4th resistance (R4), the 5th resistance (R5), the 3rd electric capacity (C3), the 4th electric capacity (C4) is formed described voltage drive half-bridge inversion circuit, when first switch triode (Q1) conducting, pass through the elementary winding (n2) and the 6th electric capacity (C6) of resonance transformer (T), the 7th electric capacity (C7) forms the electromagnetism charge and discharge process of LC series resonance, discharges and recharges the first auxiliary winding (n1) of cycle moment resonance transformer (T) at each, two phase places of induction generation are opposite successively in the second auxiliary winding (n3), the voltage excitation signals that voltage amplitude is identical is passed through the 4th resistance (R4), the 5th resistance (R5), the 3rd electric capacity (C3), the 4th electric capacity (C4) is to drive first switch triode (Q1), second switch triode (Q2) alternate conduction with end; The 3rd resistance (R3), the 6th resistance (R6), the 7th resistance (R7), the 5th electric capacity (C5), the 3rd switching diode (D3), one-way SCR (SCR) are formed described circuit overcurrent protection, when the output short-circuit of described antihunt circuit or overburden, make it open-minded by the control utmost point that is injected into one-way SCR (SCR) behind the 3rd switching diode (D3), the 7th resistance (R7), the 5th electric capacity (C5) smothing filtering, the base potential of first switch triode (Q1) is pulled low to closes; The 4th switching diode (D4), the 5th switching diode (D5) are formed described antihunt circuit, absorb the inverse peak voltage that produces in first switch triode (Q1), (Q2) conducting of second switch triode and the procedures of turn-off.
9. low-pressure high-power LED shot-light high-frequency electronic transformer as claimed in claim 8, it is characterized in that, also comprise: the rectification filtering module that links to each other with described voltage drive semi-bridge inversion module, comprise: fuse (FU), first electric capacity (C1), second electric capacity (C2), piezo-resistance (VR), differential mode inductance (L) and rectifier bridge heap (BR), wherein, first electric capacity (C1) termination zero line, the other end of going into AC power is connected with the phase line of AC power by fuse (FU); Differential mode inductance (L) end is connected with the phase line of AC power by fuse (FU), also be connected with the zero line of AC power by first electric capacity (C1), differential mode inductance (L) other end respectively with piezo-resistance (VR) end, the pin (1) of rectifier bridge heap (BR) connects, piezo-resistance (VR) other end is piled the pin (3) of (BR) respectively with rectifier bridge, the zero line of AC power links to each other, the pin (4) of rectifier bridge heap (BR) joins with second electric capacity (C2) end, the pin (2) of rectifier bridge heap (BR) joins with second electric capacity (C2) other end, the positive direct-current of pin (2) output ripple of rectifier bridge heap (BR), direct current is born in pin (4) output of rectifier bridge heap (BR), exports the start-up circuit of described voltage drive semi-bridge inversion module to.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201020518748 CN201830511U (en) | 2010-09-03 | 2010-09-03 | High-frequency electronic transformer for low-voltage high-power light emitting diode (LED) spot lamp |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201020518748 CN201830511U (en) | 2010-09-03 | 2010-09-03 | High-frequency electronic transformer for low-voltage high-power light emitting diode (LED) spot lamp |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066858A (en) * | 2013-01-22 | 2013-04-24 | 广东新昇电业科技股份有限公司 | Voltage feedback type half-bridge circuit |
| CN103547019A (en) * | 2012-07-13 | 2014-01-29 | 海尔集团公司 | Device for controlling illuminating lamp to be brightened gradually and refrigerator with device |
| CN104022649A (en) * | 2013-03-01 | 2014-09-03 | 深圳市海洋王照明工程有限公司 | 110V/220V dual-purpose power supply device and illuminating lamp |
| CN113098247A (en) * | 2021-03-31 | 2021-07-09 | 漳州科华技术有限责任公司 | Power supply anti-peak processing method and device and terminal |
-
2010
- 2010-09-03 CN CN 201020518748 patent/CN201830511U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103547019A (en) * | 2012-07-13 | 2014-01-29 | 海尔集团公司 | Device for controlling illuminating lamp to be brightened gradually and refrigerator with device |
| CN103066858A (en) * | 2013-01-22 | 2013-04-24 | 广东新昇电业科技股份有限公司 | Voltage feedback type half-bridge circuit |
| CN104022649A (en) * | 2013-03-01 | 2014-09-03 | 深圳市海洋王照明工程有限公司 | 110V/220V dual-purpose power supply device and illuminating lamp |
| CN113098247A (en) * | 2021-03-31 | 2021-07-09 | 漳州科华技术有限责任公司 | Power supply anti-peak processing method and device and terminal |
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