CN2706958Y - Self-activated switch power - Google Patents
Self-activated switch power Download PDFInfo
- Publication number
- CN2706958Y CN2706958Y CN 200420022858 CN200420022858U CN2706958Y CN 2706958 Y CN2706958 Y CN 2706958Y CN 200420022858 CN200420022858 CN 200420022858 CN 200420022858 U CN200420022858 U CN 200420022858U CN 2706958 Y CN2706958 Y CN 2706958Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- self
- resistance
- frequency
- switch power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a self-activated switch power, characterized in that a power circuit is that a full-wave voltage multiplying rectifying and filtering circuit is connected with high-frequency self-activated oscillation and damping and high-frequency ripple cancel circuits respectively connected with a quadratic rectifying and filtering circuit and a sampling, pressure stabling, excessive pressure, short-circuit and over current controlling circuit which are connected together. Because the damping and high-frequency ripple cancel circuit is added, and no oscillating circuit chip is needed in the implement, the utility model has simple structure and low manufacturing cost, and is convenient for popularization and mass production; and a high-frequency transformer is used. The reasonable structural design and coiling method make the working of the switch power circuit stable and reliable, the output power big, and the accuracy of the output direct current voltage, the voltage regulation rate, the load regulation rate, the ripple output, etc. superior to various switch powers in the existing market.
Description
Technical field:
The utility model belongs to the technical field of Switching Power Supply, specifically a kind of self-activated switch power supply that relates to.
Background technology:
The circuit of present self-activated switch power supply is comparatively complicated, and weakening and high frequency ripple are not set eliminate circuit, therefore the error of voltage accuracy and output ripple is bigger, the error of voltage regulation, load regulation is also bigger, the high-frequency self-excitation oscillating circuit of this external Switching Power Supply can produce an oscillating impulse, this oscillating impulse is similar to rectangular ripple, have the very big forward and the waveform of negative peak, such waveform not only damages switching transistor easily, and power consumption is big, and it is big to exchange high-frequency ripple.
Summary of the invention:
The purpose of this utility model is to provide a kind of improved self-activated switch power supply, and it can make the error of voltage accuracy and output ripple less.
To achieve these goals, the technical solution of the utility model is: a kind of self-activated switch power supply, it mainly comprises housing and is contained in the interior power circuit of housing, it is characterized in that: described power circuit is, the full wave and voltage doubling rectification is eliminated circuit with filter circuit with high-frequency self-excitation vibration and weakening high frequency ripple and is connected, the high-frequency self-excitation vibration is eliminated circuit with the weakening high frequency ripple and is connected with filter circuit with the secondary rectification respectively, the sampling voltage stabilizing was controlled pressure-controlled short circuit overcurrent control circuit and was connected, and the secondary rectification was controlled pressure-controlled short circuit overcurrent control circuit with filter circuit and sampling voltage stabilizing and is connected.
The utility model is owing to set up weakening and high frequency ripple elimination circuit, when implementing, do not need the oscillating circuit chip, therefore simple in structure, low cost of manufacture is easy to promote and produce in enormous quantities, and has used high frequency transformer, its reasonable structural design and winding method, make that the switching power circuit working stability is reliable, power output is big, and the precision of output dc voltage, voltage regulation, load regulation and output ripple etc. all are better than the various Switching Power Supplies on the existing market.
Description of drawings:
Fig. 1 is the utility model electrical block diagram
Fig. 2 is the circuit theory diagrams of the utility model one embodiment
Fig. 3 is the utility model fundamental diagram
Fig. 4 is a rectangle oscillating impulse output waveform figure on the switching transistor collector electrode in the prior art
Fig. 5 is the utility model high frequency transformer high-frequency impulse oscillogram
Embodiment:
Below in conjunction with drawings and Examples the utility model is further described.
The utility model mainly comprises housing and is contained in the interior power circuit of housing, it is different from prior art and is: described power circuit is, the full wave and voltage doubling rectification is eliminated circuit 2 with filter circuit 1 with high-frequency self-excitation vibration and weakening high frequency ripple and is connected, the high-frequency self-excitation vibration is eliminated circuit with the weakening high frequency ripple and is connected with filter circuit 3 with the secondary rectification respectively, the sampling voltage stabilizing was controlled pressure-controlled short circuit overcurrent control circuit 4 and was connected, the secondary rectification was controlled pressure-controlled short circuit overcurrent control circuit with filter circuit and sampling voltage stabilizing and was connected, wherein high-frequency self-excitation vibration and weakening high frequency ripple elimination circuit are seen Fig. 2, one end of capacitor C 6 is connected with an end of an end of resistance R 2 and primary, the other end of capacitor C 6 respectively with an end of capacitor C 7, the negative terminal of diode D1, the other end of resistance R 2 connects, the anode of diode D1 is connected with the end of resistance R L, the other end of the other end of capacitor C 7 and resistance R L, the other end of primary connects, the overcurrent short-circuit control circuit is arranged in the high-frequency self-excitation oscillating circuit, in the overcurrent short-circuit control circuit end of R14 respectively with the emitter of switching transistor V1, one end of resistance R 13 connects, the other end ground connection of resistance R 14.When overcurrent, short circuit; during the voltage drop on the resistance R 14 〉=1V; then make V2 transistor turns (0.7V); this moment V1 Vce＜0.7V; V1 is ended, and at this moment circuit is output as 0, reaches protective effect; it is high speed diode that weakening and high frequency ripple are eliminated the diode D1 described in the circuit, and resistance R L is a high frequency magnetic core resistance.
In the prior art, after powering on, circuit will form oscillating impulse output at the collector electrode of switching transistor V1, this square wave pulse is a waveform with very big forward peak value and negative peak, see Fig. 4, the comparable input supply voltage of this crest voltage (300V) is high 2～3 times, as seen such crest not only damages switching transistor V1 easily, power consumption is bigger in addition, the interchange high-frequency ripple is big, in order to overcome above-mentioned these phenomenons, the utility model design in concrete enforcement adopts special weakening and high frequency ripple to eliminate circuit, makes the forward and the negative sense upward peak pulse complete obiteration basically of the output voltage waveforms on the switching transistor V1 collector electrode.
Operation principle of the present utility model is seen Fig. 3, magnetic energy is stored in the transformer T1 from input in the Ton time, then this magnetic energy is emitted to output as a kind of power output in the time at the Toff that is right after, the Toff time is when finishing, OV is returned in the free oscillation of transformer T1 voltage
Because the voltage of the base winding of transformer is the triggering signal of the on of V1, promptly begins new one-period, promptly forms the self-excitation higher-order of oscillation, finishes the high frequency conversion (input voltage vin becomes output voltage V out) of Switching Power Supply thus, loikkdied
The utility model adopts high frequency transformer when implementing, the winding method of technical finesses such as this high frequency transformer employing is elementary, secondary winding alternatively layered, even space out, and its oscillogram is seen Fig. 5.
Claims (4)
1, a kind of self-activated switch power supply, it mainly comprises housing and is contained in the interior power circuit of housing, it is characterized in that: described power circuit is, the full wave and voltage doubling rectification is eliminated circuit with filter circuit with high-frequency self-excitation vibration and weakening high frequency ripple and is connected, high-frequency self-excitation vibration and weakening high frequency ripple are eliminated circuit and were controlled the connection of pressure-controlled short circuit overcurrent control circuit with the secondary rectification voltage stabilizing that is connected, takes a sample with filter circuit respectively, and the secondary rectification was controlled pressure-controlled short circuit overcurrent control circuit with filter circuit and sampling voltage stabilizing and is connected.
2, by the described a kind of self-activated switch power supply of claim 1, it is characterized in that: high-frequency self-excitation vibration and weakening high frequency ripple are eliminated in the circuit, one end of capacitor C 6 is connected with an end of an end of resistance R 2 and primary, the other end of capacitor C 6 is connected with an end of capacitor C 7, the negative terminal of diode D1, the other end of resistance R 2 respectively, the anode of diode D1 is connected with the end of resistance R L, and the other end of capacitor C 7 is connected with the other end of resistance R L, the other end of primary.
3, by the described a kind of self-activated switch power supply of claim 1, it is characterized in that: high-frequency self-excitation vibration and weakening high frequency ripple are eliminated in the circuit the overcurrent short-circuit control circuit, the end of R14 is connected the other end ground connection of resistance R 14 with the emitter of switching transistor V1, an end of resistance R 13 respectively in the overcurrent short-circuit control circuit.
4, by the described a kind of self-activated switch power supply of claim 2, it is characterized in that: it is high speed diode that high-frequency self-excitation vibration and weakening high frequency ripple are eliminated the diode D1 described in the circuit, and resistance R L is a high frequency magnetic core resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420022858 CN2706958Y (en) | 2004-05-18 | 2004-05-18 | Self-activated switch power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420022858 CN2706958Y (en) | 2004-05-18 | 2004-05-18 | Self-activated switch power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2706958Y true CN2706958Y (en) | 2005-06-29 |
Family
ID=34849195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420022858 Expired - Fee Related CN2706958Y (en) | 2004-05-18 | 2004-05-18 | Self-activated switch power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2706958Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100454739C (en) * | 2004-05-18 | 2009-01-21 | 上海美芝欧加电器有限公司 | Self-exciting switching power supply |
| CN101900760A (en) * | 2010-06-25 | 2010-12-01 | 洪金文 | Electricity meter and power source applicable to same |
-
2004
- 2004-05-18 CN CN 200420022858 patent/CN2706958Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100454739C (en) * | 2004-05-18 | 2009-01-21 | 上海美芝欧加电器有限公司 | Self-exciting switching power supply |
| CN101900760A (en) * | 2010-06-25 | 2010-12-01 | 洪金文 | Electricity meter and power source applicable to same |
| CN101900760B (en) * | 2010-06-25 | 2012-02-15 | 洪金文 | Electricity meter and power source applicable to same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101777770A (en) | Control circuit for voltage dropping type power factor corrector | |
| CN112583252B (en) | High-power-density high-gain converter and control method thereof | |
| CN201839208U (en) | PFC/PWM two-in-one switching power supply circuit | |
| CN100423400C (en) | Low ripple high reliable high-capacity capacitance voltage stabilizing charging circuit | |
| CN103414323B (en) | Reduce the circuit of service time in current-control type switching regulators | |
| CN114629349A (en) | Improved high-frequency high step-up ratio SEPIC converter based on switching inductor | |
| CN116317621A (en) | Power supply circuit and electronic equipment | |
| CN203466720U (en) | Circuit reducing opening time in current control type switching regulating system | |
| CN202872640U (en) | A power supply module capable of outputting in variable and low cross regulation rates | |
| CN202840988U (en) | High voltage cathode power supply with high precision | |
| CN204578367U (en) | A kind of Switching Power Supply of BOOST circuit topological structure | |
| CN2706958Y (en) | Self-activated switch power | |
| CN110350802B (en) | Double-transformer self-oscillation type half-bridge driving voltage-multiplying conversion circuit | |
| CN115347796B (en) | High-power density ZVS high-gain converter based on common-mode inductance | |
| CN218449862U (en) | Novel pulse plasma power supply | |
| CN218783723U (en) | Flyback switching power supply based on control chip | |
| CN100454739C (en) | Self-exciting switching power supply | |
| CN215498737U (en) | Wide-range voltage input direct-current power supply circuit | |
| CN213027824U (en) | High-voltage wide-input double-tube flyback converter circuit | |
| CN211701864U (en) | Novel multi-path floating driving power supply circuit | |
| CN103441672A (en) | Self-excitation BUCK circuit based on auxiliary winding sampling circuit | |
| CN114400897A (en) | Self-excitation type Buck converter | |
| CN210111852U (en) | Switching power supply voltage-reducing and voltage-boosting conversion circuit | |
| CN111049387B (en) | TLC II type resonant circuit and power converter applied by same | |
| CN208539786U (en) | Low-cost DC-DC voltage reduction circuit |
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: 20050629 Termination date: 20120518 |