CN200990565Y - Buffer switch power supply - Google Patents
Buffer switch power supply Download PDFInfo
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- CN200990565Y CN200990565Y CN 200620067358 CN200620067358U CN200990565Y CN 200990565 Y CN200990565 Y CN 200990565Y CN 200620067358 CN200620067358 CN 200620067358 CN 200620067358 U CN200620067358 U CN 200620067358U CN 200990565 Y CN200990565 Y CN 200990565Y
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- buffer switching
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Abstract
The utility model discloses a buffering switch power source, which comprises an electromagnetic compatible safety circuit, a rectifying filter circuit, a power factor correcting circuit, a chopping circuit, a DC chopping circuit, a lightning protection circuit and a power supplier. Wherein, the power inputting end of the switch power source is respectively connected in turn with the electromagnetic compatible safety circuit, the rectifying filter circuit, the power factor correcting circuit, the chopping circuit, the DC chopping circuit, the lightning protection circuit and a load circuit. Output end of the rectifying filter circuit is respectively connected with input end of the power supplier, and output end of the power supplier is respectively connected with the power factor correcting circuit and the chopping circuit. By adopting the power factor correcting circuit and the chopping circuit, the utility model improves outputting power factor, restrains surge impact in start of LED lamp or lamp cluster, increases current and voltage of circuit of output end gradually, and prevents mutation, thereby prolonging the service life of the LED lamp or lamp cluster.
Description
Affiliated technical field
The utility model relates to a kind of power supply of giving decorative chain or lighting power supply, especially a kind of buffer switching power supply that is applied in the LED field.
Background technology
At present, mostly adopt the civil power of 220V directly to obtain 12V or 24V galvanic current for the power supply of LED decorative chain or lighting power supply through transformer, rectification, filtering and buffering.Yet each big and medium-sized cities electricity consumption of China all exists tangible peak and low ebb phase, peak of power consumption and the change in voltage of low ebb phase are apparent in view again in the urban district, 23 later residents and each business electrical amount reduce greatly at dead of night, near the low ebb phase, electric current is less relatively in the supply line at this moment, line loss reduces, and voltage increases.Very big voltage be can exceed between the general line of LED light fixture or lamp string road,,, or LED light fixture or the damage of lamp string directly caused because the super-high-current that produces causes circuit to burn out suddenly when the moment that lamp is lighted for 12V or 24V.
Summary of the invention
The purpose of this utility model is in order to address the above problem, provide a kind of and can improve power factor (PF), when light fixture or the startup of lamp string, suppress surge impact, electric current, voltage in the circuit of output are increased gradually, do not produce sudden change, the buffer switching power supply that prolongs LED light fixture or lamp string useful life.
To achieve these goals, the utility model provides a kind of buffer switching power supply, comprise Electro Magnetic Compatibility safety circuit, current rectifying and wave filtering circuit, power factor correction circuit, chopper circuit, the DC filtering circuit, lightning prevention circuit and electric supply installation, it is characterized in that: the power input of above-mentioned Switching Power Supply is electrically connected Electro Magnetic Compatibility safety circuit in proper order, current rectifying and wave filtering circuit, power factor correction circuit, chopper circuit, the DC filtering circuit, lightning prevention circuit and load circuit, the output of above-mentioned current rectifying and wave filtering circuit also is electrically connected with the input of electric supply installation, and the output of electric supply installation is electrically connected with power factor correction circuit and chopper circuit respectively.
The anti-electromagnetic interference that above-mentioned Electro Magnetic Compatibility safety circuit is made up of resistance, electric capacity, inductance and bi-directional voltage stabilizing diode and play the circuit of safety detection.
The bridge rectifier that above-mentioned current rectifying and wave filtering circuit is made up of four diodes and constituted by the filter circuit that electric capacity is formed.
Above-mentioned power factor correction circuit is a parallel boosted switch circuit, is made up of IC chip, resistance, electric capacity, power transistor, diode, transformer and voltage stabilizing didoe.
Above-mentioned chopper circuit is a direct current buck circuit, is made up of IC chip, resistance, electric capacity, inductance, one-way SCR, power transistor, diode and voltage stabilizing didoe.
In the above-mentioned IC chip, it is SG2524 that a chip model that has been used for the copped wave control action is arranged.
Above-mentioned DC filtering circuit is to be composed in parallel by a resistance and an electrochemical capacitor.
Above-mentioned lightning prevention circuit is to be composed in parallel by a coil inductance and a two-way voltage stabilizing didoe.
Above-mentioned electric supply installation is made up of IC chip, resistance, electric capacity, inductance, diode and voltage stabilizing didoe.
The output of above-mentioned power factor correction circuit power transistor direct and in the chopper circuit is electrically connected.
The copped wave of above-mentioned chopper circuit partly is made up of power transistor, resistance, inductance and fly-wheel diode.
The utility model compared with prior art its beneficial effect is: this technology adopts power factor correction circuit that the output result of bridge rectifier is responded, and proofreaies and correct, and has improved the power factor (PF) of output, makes the power factor (PF) after the correction can reach 0.98; Adopt the DC decompression chopper circuit simultaneously, utilize the ON time length of pulse duration control chip power controlling transistor in the one-period of high-voltage pulse, when ON time shorter, when just pulse duration is very narrow, the average voltage at load two ends is just lower, when ON time longer, when just pulse duration is very wide, the average voltage at load two ends is just higher, elongated by weak point when ON time, when just pulse duration was by narrow broadening, the average voltage at load two ends was then raise by low, corresponding bulb brightness will be by secretly brightening gradually, tend towards stability at last, suppressed the surge impact that LED light fixture or lamp string have when starting, make the electric current in the circuit of its output, voltage increases gradually, do not produce sudden change, thereby prolonged the useful life of LED light fixture or lamp string.
Description of drawings
Fig. 1 is the circuit block diagram of a kind of buffer switching power supply of the utility model;
Fig. 2 is the circuit theory diagrams of a kind of buffer switching power supply of the utility model.
Embodiment
Below the content of a kind of buffer switching power supply of the utility model is further described in conjunction with the accompanying drawings and embodiments:
With reference to Fig. 1, the utility model is a kind of buffer switching power supply, comprise an Electromagnetic Compatibility safety circuit 1 that is connected with the alternating current of 230V, one receives the bridge rectifier filter circuit 2 of Electromagnetic Compatibility safety circuit 1 output signal, one receives bridge rectifier filter circuit 2 output signals and boosted voltage, improve Active PFC (PFC) circuit 3 of power, the chopper circuit 4, one that one received power factor is proofreaied and correct (PFC) circuit 3 output high-voltage signals and carried out step-down receives chopper circuit 4 output signals and carries out the DC filtering circuit 5 of ripple filtering and guarantee that the lightning prevention circuit 6 and that line security uses is Active PFC (PFC) circuit 3, the electric supply installation 7 of powering during chopper circuit 4 operate as normal.
With reference to Fig. 2, Fig. 2 is the circuit theory diagrams of a kind of buffer switching power supply of the utility model, anti-electromagnetic interference that the alternating current of 230V is formed via resistance, electric capacity, inductance and bi-directional voltage stabilizing diode and Electromagnetic Compatibility safety circuit 1 back of playing safety detection are connected with the input of current rectifying and wave filtering circuit 2, the bridge rectifier that described current rectifying and wave filtering circuit 2 is made up of four diodes and be made of the filter circuit that electric capacity is formed.Voltage behind rectifying and wave-filtering is electrically connected the input of electric supply installation 7 and the input of Active PFC (PFC) circuit 3 respectively, voltage through 3 outputs of Active PFC (PFC) circuit is the high-pressure pulsating direct current of 400V, described Active PFC (PFC) circuit 3 is parallel boosted switch circuit, form by chip IC 1, resistance, electric capacity, power transistor, diode, transformer and voltage stabilizing didoe, and the output result of above-mentioned current rectifying and wave filtering circuit 2 responded, proofread and correct, improve the power factor (PF) of voltage and output.High-pressure pulsating direct current with 400V directly is electrically connected with the power transistor of chopper circuit 4 again, described chopper circuit 4 is a direct current buck circuit, is made up of chip IC 2, IC3, IC5, resistance, electric capacity, inductance, one-way SCR, power transistor, diode and voltage stabilizing didoe.Wherein, what chip IC 5 adopted is that the model that Shenzhen dark prestige will Electronics Co., Ltd. produces is the IC chip of SG2524, has been used for the copped wave control action; The copped wave of this chopper circuit partly comprises power transistor, resistance, inductance and fly-wheel diode, utilize the ON time length of pulse duration control (PWM) chip IC 5 power controlling transistors in the one-period of high-voltage pulse, when ON time shorter, when just pulse duration is very narrow, the average voltage at load two ends is lower, when ON time longer, when just pulse duration is very wide, the average voltage at load two ends is higher, elongated by weak point when ON time, when just pulse duration was by narrow broadening, the average voltage at load two ends was then raise by low, corresponding bulb brightness will tend towards stability at last by secretly brightening gradually; Wherein, the control procedure of 5 pairs of power transistors of described pulse duration control (PWM) chip IC is feedback circuits that utilize error voltage control output pulse width, when output voltage raises, electric current by inductance increases gradually, sampling feedback increases to the electric current of pulse duration control (PWM) chip IC 5 simultaneously, pulse duration control (PWM) chip IC 5 will shorten the ON time of power transistor, the pulse duration of output is narrowed down, thereby output voltage is reduced, kept the stable of load both end voltage.230V low tension with output leaches ripple component via the DC filtering circuit 5 that a resistance and an electrochemical capacitor compose in parallel at last, become constant DC and connect the lightning prevention circuit 6 that composes in parallel by a coil inductance and a two-way voltage stabilizing didoe, the voltage that supply load LED lighting or decorative chain are required.Circuit 7 described in the figure is electric supply installations of power supply, is made up of chip IC 4, resistance, electric capacity, inductance, diode and voltage stabilizing didoe, for Active PFC (PFC) circuit 3, chopper circuit 4 provide normal operating voltage.
The utility model is owing to adopted Active PFC (PFC) circuit 3 and chopper circuit 4, the power factor (PF) that has not only improved, and suppressed the surge impact that LED light fixture or lamp string have when starting, electric current, voltage in the circuit of output are increased gradually, do not produce sudden change, thereby prolonged the useful life of LED light fixture or lamp string.Above illustrated embodiment only with convenient explanation the utility model, is not breaking away from creation spirit scope of the present utility model, is familiar with any simple covert and modification that the personage did of this technology, must be contained in the rights protection scope of the present utility model.
Claims (11)
1, a kind of buffer switching power supply, comprise Electro Magnetic Compatibility safety circuit, current rectifying and wave filtering circuit, power factor correction circuit, chopper circuit, the DC filtering circuit, lightning prevention circuit and electric supply installation, it is characterized in that: the power input of above-mentioned Switching Power Supply is electrically connected Electro Magnetic Compatibility safety circuit in proper order, current rectifying and wave filtering circuit, power factor correction circuit, chopper circuit, the DC filtering circuit, lightning prevention circuit and load circuit, the output of above-mentioned current rectifying and wave filtering circuit also is electrically connected with the input of electric supply installation, and the output of electric supply installation is electrically connected with power factor correction circuit and chopper circuit respectively.
2, buffer switching power supply according to claim 1 is characterized in that: the anti-electromagnetic interference that above-mentioned Electro Magnetic Compatibility safety circuit is made up of resistance, electric capacity, inductance and bi-directional voltage stabilizing diode and play the circuit of safety detection.
3, buffer switching power supply according to claim 1 is characterized in that: the bridge rectifier that above-mentioned current rectifying and wave filtering circuit is made up of four diodes and be made of the filter circuit that electric capacity is formed.
4, buffer switching power supply according to claim 1, it is characterized in that: above-mentioned power factor correction circuit is a parallel boosted switch circuit, is made up of IC chip, resistance, electric capacity, power transistor, diode, transformer and voltage stabilizing didoe.
5, buffer switching power supply according to claim 1, it is characterized in that: above-mentioned chopper circuit is a direct current buck circuit, is made up of IC chip, resistance, electric capacity, inductance, one-way SCR, power transistor, diode and voltage stabilizing didoe.
6, buffer switching power supply according to claim 5 is characterized in that: in the above-mentioned IC chip, it is SG2524 that a chip model that has been used for the copped wave control action is arranged.
7, buffer switching power supply according to claim 1 is characterized in that: above-mentioned DC filtering circuit is that a bent resistance and an electrochemical capacitor compose in parallel.
8, buffer switching power supply according to claim 1 is characterized in that: above-mentioned lightning prevention circuit is to be composed in parallel by a coil inductance and a two-way voltage stabilizing didoe.
9, buffer switching power supply according to claim 1 is characterized in that: above-mentioned electric supply installation is made up of IC chip, resistance, electric capacity, inductance, diode and voltage stabilizing didoe.
10, buffer switching power supply according to claim 1 is characterized in that: the output of above-mentioned power factor correction circuit power transistor direct and in the chopper circuit is electrically connected.
11, buffer switching power supply according to claim 1 is characterized in that: the copped wave of above-mentioned chopper circuit partly is made up of power transistor, resistance, inductance and fly-wheel diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620067358 CN200990565Y (en) | 2006-11-07 | 2006-11-07 | Buffer switch power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620067358 CN200990565Y (en) | 2006-11-07 | 2006-11-07 | Buffer switch power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200990565Y true CN200990565Y (en) | 2007-12-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620067358 Expired - Fee Related CN200990565Y (en) | 2006-11-07 | 2006-11-07 | Buffer switch power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200990565Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1967992B (en) * | 2006-10-18 | 2010-04-21 | 鹤山丽得电子实业有限公司 | A buffer switching power supply |
-
2006
- 2006-11-07 CN CN 200620067358 patent/CN200990565Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1967992B (en) * | 2006-10-18 | 2010-04-21 | 鹤山丽得电子实业有限公司 | A buffer switching power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071212 Termination date: 20091207 |