CN204013235U - The small power electric source circuit of symmetrical operation - Google Patents
The small power electric source circuit of symmetrical operation Download PDFInfo
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- CN204013235U CN204013235U CN201420374899.9U CN201420374899U CN204013235U CN 204013235 U CN204013235 U CN 204013235U CN 201420374899 U CN201420374899 U CN 201420374899U CN 204013235 U CN204013235 U CN 204013235U
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Abstract
The utility model provides a kind of small power electric source circuit of symmetrical operation.The small power electric source circuit of the utility model symmetrical operation, comprising: pulse control circuit, symmetrical operation circuit and more than three voltage doubling rectifing circuit; Described pulse control circuit is connected with described symmetrical operation circuit, and described more than three voltage doubling rectifing circuit is in parallel and be all connected with described symmetrical operation circuit.The utility model realizes that a kind of power loss is little, output voltage stabilization, ripple is little, circuit simple transformer volume is little, lightweight, circuit performance is reliable, with low cost small-power power.
Description
Technical field
The utility model relates to power supply technology, relates in particular to a kind of small power electric source circuit of symmetrical operation.
Background technology
The high-power translation circuit of power supply system adopts three level power translation circuits conventionally, and due to the earth potential difference of multiple power switch pipes, the drive circuit of power switch pipe needs respectively the accessory power supply power supply of isolation mutually.
Tradition accessory power supply often adopts single-end ortho-exciting or single-ended reverse exciting translation circuit to make the accessory power supply of Multiple isolated outputs, by multiple transformers connected in parallel, and armature winding circuit connecting mode together.
But, the position of multiple power switch pipes disperses, make the line of primary return longer, the armature winding of isolating transformer, the voltage magnitude of secondary winding are high, spike disturbs large, and the high-frequency signal of primary return can disturb the normal work of control circuit, and the utilance of the magnetic core of transformer of single-end conversion circuit is low, duty ratio is little, and output voltage ripple is large.
Utility model content
The utility model provides a kind of small power electric source circuit of symmetrical operation, and to realize, a kind of power loss is little, output voltage stabilization, ripple is little, circuit simple transformer volume is little, lightweight, circuit performance is reliable, with low cost small-power power.
The utility model provides a kind of small power electric source circuit of symmetrical operation, comprising: pulse control circuit, symmetrical operation circuit and more than three voltage doubling rectifing circuit;
Described pulse control circuit is connected with described symmetrical operation circuit, and described more than three voltage doubling rectifing circuit is in parallel and be all connected with described symmetrical operation circuit.
Further, described pulse control circuit comprises pulse control chip and power supply; Described symmetrical operation circuit comprises the first resistance, the second resistance, the first triode and the second triode; Described voltage doubling rectifing circuit comprises transformer, the first electric capacity, the second electric capacity, the 3rd electric capacity, the first diode and the second diode;
One end of described the first resistance is connected with the output of described pulse control chip, the other end of described the first resistance is connected with the base stage of described the first triode and described the second triode, one end of described the second resistance is connected with described power supply, the other end of described the second resistance is connected with the collector electrode of described the first triode, the grounded collector of described the second triode; The emitter of the emitter of described the first triode and described the second triode all with elementary group of described transformer around one end be connected; Described elementary group around the other end be connected with one end of described the 3rd electric capacity, the other end ground connection of described the 3rd electric capacity;
Secondary group of described transformer around one end be connected with one end of described the first electric capacity, secondary group of described transformer around other end ground connection, the negative pole of the other end of described the first electric capacity and described the first diode, and the positive pole of described the second diode connects, the plus earth of described the first diode, the negative pole of described the second diode is connected with one end of described the second electric capacity, the other end ground connection of described the second electric capacity.
Further, described pulse control chip is pulse width modulation (PWM) control chip.
Further, described the second resistance is current-limiting resistance, and described the second resistance is for reducing the impedance of described power supply.
Further, described the second electric capacity is output capacitance.
Further, described the first diode and described the second diode are rectifying tube.
The small power electric source circuit of the utility model symmetrical operation, in the elementary employing symmetrical operation mode of transformer, utilizes the conducting in turn of triode, has improved the efficiency of transformer, has reduced the loss of triode; In the secondary employing voltage doubling rectifing circuit of transformer, output voltage is the input voltage of twice, reduce the interference of circuit, have that power loss is little, output voltage stabilization, ripple is little, circuit simple transformer volume is little, lightweight, circuit performance is reliable, the advantage such as with low cost, be specially adapted in small power electric source circuit.
Brief description of the drawings
In order to be illustrated more clearly in the utility model or technical scheme of the prior art, to the accompanying drawing of required use in utility model or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a structural representation of the small power electric source circuit of the utility model symmetrical operation;
Fig. 2 is another structural representation of the small power electric source circuit of the utility model symmetrical operation.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with the accompanying drawing in the utility model, technical scheme in the utility model is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 1 is a structural representation of the small power electric source circuit of the utility model symmetrical operation, and as shown in Figure 1, power circuit of the present utility model can comprise: pulse control circuit 10, symmetrical operation circuit 20 and four voltage doubling rectifing circuits 30; Pulse control circuit 10 is connected with symmetrical operation circuit 20, and four voltage doubling rectifing circuits 30 are in parallel and be all connected with symmetrical operation circuit 20.
The utility model relates to the required auxiliary power circuit of power module in power supply system field, and known this power circuit of those skilled in the art is applicable to the application scenarios of any small-power power, and this is not specifically limited.Structure shown in Fig. 1 comprises four voltage doubling rectifing circuits, and four output voltages can be provided, but as long as three above voltage requirements, all can be realized by power circuit of the present utility model.The small power electric source circuit of symmetrical operation, in the elementary employing symmetrical operation mode of transformer, is utilized the conducting in turn of triode, has improved the efficiency of transformer, has reduced the loss of triode; In the secondary employing voltage doubling rectifing circuit of transformer, output voltage is the input voltage of twice, reduce the interference of circuit, have that power loss is little, output voltage stabilization, ripple is little, circuit simple transformer volume is little, lightweight, circuit performance is reliable, the advantage such as with low cost, be specially adapted in small power electric source circuit.
Fig. 2 is another structural representation of the small power electric source circuit of the utility model symmetrical operation, as shown in Figure 2, on the architecture basics shown in Fig. 1, pulse control circuit 10 comprises that (Volt Current Condenser, is called for short: VCC) 12 for pulse control chip 11 and power supply; Symmetrical operation circuit 20 comprises the first resistance 21, the second resistance 22, the first triode 23 and the second triode 24; Voltage doubling rectifing circuit 30 comprises transformer 31, the first electric capacity 32, the second electric capacity 33, the 3rd electric capacity 34, the first diode 35 and the second diode 36; One end of the first resistance 21 is connected with the output (OUTPUT) of pulse control chip 11, the other end of the first resistance 21 is connected with the base stage (b) of the first triode 23 and the second triode 24, one end of the second resistance 22 is connected with power supply (VCC) 12, the other end of the second resistance 22 is connected with the collector electrode (c) of the first triode 23, (Ground, is called for short: GND) collector electrode (c) ground connection of the second triode 24; All the one end around 31a is connected with elementary group of transformer 31 for the emitter (e) of the first triode 23 and the emitter (e) of the second triode 24; The elementary group of other end around 31a is connected with one end of the 3rd electric capacity 34, the other end ground connection (GND) of the 3rd electric capacity 34; Secondary group of one end around 31b of transformer 31 is connected with one end of the first electric capacity 32, secondary group of other end ground connection (the Analog Ground around 31b, be called for short: AGND), the negative pole of the other end of the first electric capacity 32 and the first diode 35, and the positive pole of the second diode 36 connects, the plus earth (AGND) of the first diode 35, the negative pole of the second diode 36 is connected with one end of the second electric capacity 33, the other end ground connection (AGND) of the second electric capacity 33.
Preferably, pulse control chip 11 can be that (Pulse WidthModulation is called for short: PWM) control chip for pulse width modulation.The second resistance 22 is current-limiting resistance, and the second resistance 22 is for reducing the impedance of power supply.The second electric capacity 33 is output capacitance.The first diode 35 and the second diode 36 are rectifying tube.
The small power electric source circuit of the symmetrical operation shown in Fig. 2 comprises four voltage doubling rectifing circuits 30, and its circuit structure is just the same, these four voltage doubling rectifing circuit 30 parallel connections, and be connected with symmetrical operation circuit 20.
Technical problem to be solved in the utility model be just to provide a kind of stress little, disturb little push-pull type small-power power, this power supply can be used as the accessory power supply of power supply system.The duty ratio that pulse control chip 11 is exported is fixed as 50%, by the first triode 23 and the second triode 24 alternate conduction, the elementary employing symmetrical operation mode of transformer 31, the withstand voltage input voltage of generally selecting 1.5 times of switching tube, push-pull circuit improves the utilance of magnetic core of transformer; The secondary employing voltage doubling rectifing circuit of transformer 31, the withstand voltage output voltage of generally selecting 1.5 times of diode, the Circuit Fault on Secondary Transformer voltage that output voltage is twice, output voltage ripple is little, voltage stabilization, output current is little.
Taking the structure shown in Fig. 2 as basis, the following describes the operation principle of the small power electric source circuit of symmetrical operation: the second resistance 22 that is connected to power supply (VCC) 12 plays current limliting, the electric current that prevents from flowing through the first triode 23 and the second triode 24 is excessive in order to avoid cause the damage of triode; The first triode 23 and the second triode 24 are controlled its conducting and shutoff by pwm chip 11 respectively, in the time that pwm chip 11 is exported high level, the first triode 23 conductings, the second triode 24 ends, in the time of pwm chip 11 low level, the second triode 24 conductings, the first triode 23 ends, along with the conducting in turn of the first triode 23 and the second triode 24, to elementary group of transformer 31 around 31a transferring energy.
In the time of pwm chip 11 output low level, the second triode 24 conductings, the first triode 23 ends, B in Fig. 2 is being for just, and A is for negative, the first diode 35 conductings, the second diode 36 ends, charge to the first electric capacity 32 by the first diode 35, the polarity of the first electric capacity 32 is that the right side is just being born in a left side, and the first electric capacity 32 is charged to voltage Vm.
In the time that pwm chip 11 is exported high level, the first triode 23 conductings, the second triode 24 ends, B in Fig. 2 is for negative, and A is being for just, the second diode 36 conductings, the first diode 35 ends, charge to the second electric capacity 33 by the first electric capacity 32, the second diode 36, because the voltage Vm on the first electric capacity 32 adds the voltage Vm of 31 levels of transformer, make the high charge of the second electric capacity 33 to voltage 2Vm.
Said process is to describe as an example of a voltage doubling rectifing circuit 30 example, and in fact the operation principle of four voltage doubling rectifing circuits 30 is identical, repeats no more herein.
The small power electric source circuit of the utility model symmetrical operation, the elementary alternate conduction of utilizing triode, has reduced voltage stress, the loss of accessory power supply switching tube, has reduced the voltage of Transformer Winding, primary winding both end voltage is input voltage voltage, has improved the efficiency of transformer.Secondary employing voltage doubling rectifing circuit has avoided transformer to distinguish the trouble of Same Name of Ends, realizes the secondary elementary input voltage that is output as two times, has reduced the ripple of output voltage simultaneously, has improved the stability of output voltage; And can be according to required design multiple-output electric power.Multiple primary winding parallels, although the line of primary return is very long, because the voltage magnitude of the armature winding of isolating transformer, secondary winding is low, spike disturbs little, thus the stress of accessory power supply switch tube voltage also can reduce.Primary return high-frequency signal is little to control circuit effect of signals.The magnetic core utilance of transformer is high, the design proportion approximately equal of primary and secondary transformer; This circuit is simply applicable, is particularly useful for needing the auxiliary power circuit of Multiple isolated outputs, and volume of transformer is little, lightweight, with low cost, and loop is disturbed little, and output voltage ripple is little and reliable and stable.
Finally it should be noted that: above each embodiment, only in order to the technical solution of the utility model to be described, is not intended to limit; Although the utility model is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the scope of the each embodiment technical scheme of the utility model.
Claims (6)
1. a small power electric source circuit for symmetrical operation, is characterized in that, comprising: pulse control circuit, symmetrical operation circuit and more than three voltage doubling rectifing circuit;
Described pulse control circuit is connected with described symmetrical operation circuit, and described more than three voltage doubling rectifing circuit is in parallel and be all connected with described symmetrical operation circuit.
2. power circuit according to claim 1, is characterized in that, described pulse control circuit comprises pulse control chip and power supply; Described symmetrical operation circuit comprises the first resistance, the second resistance, the first triode and the second triode; Described voltage doubling rectifing circuit comprises transformer, the first electric capacity, the second electric capacity, the 3rd electric capacity, the first diode and the second diode;
One end of described the first resistance is connected with the output of described pulse control chip, the other end of described the first resistance is connected with the base stage of described the first triode and described the second triode, one end of described the second resistance is connected with described power supply, the other end of described the second resistance is connected with the collector electrode of described the first triode, the grounded collector of described the second triode; The emitter of the emitter of described the first triode and described the second triode all with elementary group of described transformer around one end be connected; Described elementary group around the other end be connected with one end of described the 3rd electric capacity, the other end ground connection of described the 3rd electric capacity;
Secondary group of described transformer around one end be connected with one end of described the first electric capacity, secondary group of described transformer around other end ground connection, the negative pole of the other end of described the first electric capacity and described the first diode, and the positive pole of described the second diode connects, the plus earth of described the first diode, the negative pole of described the second diode is connected with one end of described the second electric capacity, the other end ground connection of described the second electric capacity.
3. power circuit according to claim 2, is characterized in that, described pulse control chip is pulse width modulation (PWM) control chip.
4. power circuit according to claim 2, is characterized in that, described the second resistance is current-limiting resistance, and described the second resistance is for reducing the impedance of described power supply.
5. power circuit according to claim 2, is characterized in that, described the second electric capacity is output capacitance.
6. power circuit according to claim 2, is characterized in that, described the first diode and described the second diode are rectifying tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420374899.9U CN204013235U (en) | 2014-07-08 | 2014-07-08 | The small power electric source circuit of symmetrical operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420374899.9U CN204013235U (en) | 2014-07-08 | 2014-07-08 | The small power electric source circuit of symmetrical operation |
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| Publication Number | Publication Date |
|---|---|
| CN204013235U true CN204013235U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420374899.9U Expired - Lifetime CN204013235U (en) | 2014-07-08 | 2014-07-08 | The small power electric source circuit of symmetrical operation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108526630A (en) * | 2018-06-11 | 2018-09-14 | 扬州万泰电子科技有限公司 | A kind of intelligent wire cutting non-resistance and high-frequency pulse power circuit |
-
2014
- 2014-07-08 CN CN201420374899.9U patent/CN204013235U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108526630A (en) * | 2018-06-11 | 2018-09-14 | 扬州万泰电子科技有限公司 | A kind of intelligent wire cutting non-resistance and high-frequency pulse power circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SICON CHAT UNION ELECTRIC CO., LTD. Free format text: FORMER NAME: HEBEI SICON-EMI POWER SYSTEM CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Fourteenth, fifteenth building 319, 050035 Xiangjiang Road, hi tech Zone, Hebei, Shijiazhuang Patentee after: SICON CHAT UNION ELECTRIC CO.,LTD. Address before: 050035, 15 floor, Tianshan science and Technology Industrial Park, 319 Xiangjiang Road, Hebei, Shijiazhuang Patentee before: HEBEI SICON-EMI POWER SYSTEM Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20141210 |