CN2686205Y - Isolating self-oscillating antiviolent inverter capable of realizing soft starting - Google Patents
Isolating self-oscillating antiviolent inverter capable of realizing soft starting Download PDFInfo
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- CN2686205Y CN2686205Y CN 200420042922 CN200420042922U CN2686205Y CN 2686205 Y CN2686205 Y CN 2686205Y CN 200420042922 CN200420042922 CN 200420042922 CN 200420042922 U CN200420042922 U CN 200420042922U CN 2686205 Y CN2686205 Y CN 2686205Y
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- resistance
- effect transistor
- voltage stabilizing
- stabilizing didoe
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- 230000005669 field effect Effects 0.000 claims abstract description 30
- 230000008878 coupling Effects 0.000 claims abstract description 27
- 238000010168 coupling process Methods 0.000 claims abstract description 27
- 238000005859 coupling reaction Methods 0.000 claims abstract description 27
- 238000004804 winding Methods 0.000 claims abstract description 11
- 230000000087 stabilizing effect Effects 0.000 claims description 20
- 239000003990 capacitor Substances 0.000 claims description 19
- 230000005622 photoelectricity Effects 0.000 claims description 6
- 239000013078 crystal Substances 0.000 abstract 5
- 238000002955 isolation Methods 0.000 abstract 2
- 239000003381 stabilizer Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007600 charging Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Abstract
The utility model discloses an isolating self-oscillating anti-violent inverter capable of realizing soft starting composed of a coupling transformer, a field-effect transistor, a crystal polar tube and an electro-optic coupling isolation ultramagnifier. The input terminal of the circuit is connected with the source electrode of the field-effect transistor through the first coil of the coupling transformer. The input terminal of the circuit is connected with the collector of the crystal polar tube through a resistor R1 and a resistor R2. The source electrode of the field-effect transistor is connected with the collector of the crystal polar tube. One path of the drain electrode of the field-effect transistor is connected with the ground through the resistor. The other path is connected with the base electrode of the crystal polar tube through the resistor and the doublet of the capacitance. The base electrode of the crystal polar tube is connected with the output terminal of the secondary output winding of the coupling transformer through the electro-optic coupling isolation ultramagnifier. The concatenation point between the resistor R1 and the resistor R2 is connected with the ground through a speedup condenser and the secondary winding of the coupling transformer. A return circuit used for obtaining soft starting of the circuit is connected between the input terminal of the circuit and the concatenation point. The starting current of the utility model is small. When the input voltage is higher, the utility model can also keep normal work.
Description
Technical field
The utility model relates to a kind of isolated self-oscillation reverse exciting inverter that self-oscillation reverse excitation power supply module can realize soft start that is used for.
Background technology
Existing isolated self-oscillation reverse exciting inverter comprises coupling transformer, field effect transistor, brilliant utmost point pipe and optocoupler isolator vibrate, as shown in Figure 1, after input adds voltage, electric current directly flows through resistance R 1, R2 makes field effect transistor TR1 be tending towards conducting, the primary coil P1 of coupling transformer has electric current to flow through, coupling makes the polarity of secondary winding P2 make the further conducting of field effect transistor TR1, it is by speed-up capacitor C1 that the positive voltage of secondary winding P2 begins, resistance R 2 passes on the field effect transistor TR1, so the drive current waveform forward position of field effect transistor TR1 is very steep, help its quick conducting.After the field effect transistor TR1 conducting, the electric current of flow through elementary winding P1, transistor T R1 causes pressure drop on resistance R 4, and polarity negative just down on it makes transistor T R2 conducting through resistance R 3, capacitor C 2.After the transistor T R2 conducting, make the grid of field effect transistor TR1 shunt, field effect transistor TR1 will turn-off.Field effect transistor TR1 closes and has no progeny, and the electric current that flows through its drain electrode is zero, thereby the pressure drop on the resistance R 4 is zero, and transistor T R2 will close, and field effect transistor TR1 is conducting again.So circulation, circuit will produce self-oscillation.After the self-oscillation work, this circuit will carry out instead swashing.Output feeds back electric current on the oxide-semiconductor control transistors TR2 base stage by the optocoupler isolator phototriode, thereby regulates the make-and-break time of field effect transistor TR1, transistor T R2.Here it is circuit anti-swashs process.
Because voltage directly starts transistor T R1 by resistance R 1, R2 in the foregoing circuit, makes starting current big; In addition when input voltage is higher, in the moment that voltage has just been imported, in resistance R 1, very big transient current spike of the last generation of R2, make the instantaneous conducting of transistor, this transient current spike just might make transistor breakdown, and the too high voltages that is added in simultaneously on the pipe also can make transistor damage, also will cause the problem of product poor starting.
The utility model content
The purpose of this utility model is to provide a kind of starting current little, also can keep the isolated self-oscillation reverse exciting inverter of operate as normal when input voltage is higher.
The purpose of this utility model can realize by following technical measures: comprise coupling transformer T, field effect transistor TR1, brilliant utmost point pipe TR2 and the photoelectricity coupling of vibrating isolated feedback device OP, circuit input end connects the source electrode of field effect transistor TR1 through the primary coil P1 of coupling transformer T, circuit input end is connected the collector electrode of brilliant utmost point pipe TR2 with resistance R 2 through resistance R 1, the grid of field effect transistor TR1 is connected with the collector electrode of brilliant utmost point pipe TR2, the drain electrode one tunnel of field effect transistor TR1 is through resistance R 4 ground connection, another road is connected the base stage of brilliant utmost point pipe TR2 through the doublet of resistance R 3 and capacitor C 2, and the base stage of brilliant utmost point pipe TR2 connects the output of the secondary output winding P3 of coupling transformer T through photoelectricity coupling isolated feedback device OP; Serial connection point A between described resistance R 1 and the resistance R 2 is through the secondary winding P2 of speed-up capacitor C1, coupling transformer T ground connection; It is characterized in that being connected with the loop that is used to realize the circuit soft start between described circuit input end and the serial connection point A.
Soft start described in the utility model loop is made up of resistance R 1 and voltage stabilizing didoe D1, and resistance R 1 is connected with the negative electrode of voltage stabilizing didoe D1, and the anode of voltage stabilizing didoe D1 is connected with serial connection point A.
Soft start described in the utility model loop is made up of resistance R 1, voltage stabilizing didoe D1, diode D2 and capacitor C 3, resistance R 1 is connected with the negative electrode of voltage stabilizing didoe D1, the anode of voltage stabilizing didoe D1 connects the anode of diode D2, the negative electrode of diode D2 connects serial connection point A, one end of capacitor C 3 is connected between the negative electrode of resistance R 1 and voltage stabilizing didoe D1, its other end ground connection.
The utility model compared with prior art mainly contains following advantage: 1, owing to set up soft starting circuit, make its starting current little, no matter be that heavy load or capacitive load all only produce very little starting current, can improve the starting characteristic of this circuit greatly; 2, to the input voltage no requirement (NR), this circuit also can operate as normal when input voltage is higher.
Description of drawings
Fig. 1 is the circuit theory diagrams of existing isolated self-oscillation reverse exciting inverter;
Fig. 2 is the circuit theory diagrams of the utility model embodiment one;
Fig. 3 the utility model embodiment two circuit theory diagrams.
Embodiment
As shown in Figure 2, this enforcement 1 comprises coupling transformer T, field effect transistor TR1, brilliant utmost point pipe TR2 and the photoelectricity coupling of vibrating isolated feedback device OP, circuit input end connects the source electrode of field effect transistor TR1 through the primary coil P1 of coupling transformer T, circuit input end is connected the collector electrode of brilliant utmost point pipe TR2 with resistance R 2 through resistance R 1, the grid of field effect transistor TR1 is connected with the collector electrode of brilliant utmost point pipe TR2, the drain electrode one tunnel of field effect transistor TR1 is through resistance R 4 ground connection, another road is connected the base stage of brilliant utmost point pipe TR2 through the doublet of resistance R 3 and capacitor C 2, and the base stage of brilliant utmost point pipe TR2 connects the output of the secondary output winding P3 of coupling transformer T through photoelectricity coupling isolated feedback device OP; Serial connection point A between resistance R 1 and the resistance R 2 is through the secondary winding P2 of speed-up capacitor C1, coupling transformer T ground connection; Resistance R 1 is connected with the negative electrode of voltage stabilizing didoe D1, and the anode of voltage stabilizing didoe D1 is connected with serial connection point A.
Add voltage at circuit input end, through after the capacitor C filtering, electric current flow through resistance R 1, voltage-stabiliser tube D1, resistance R 2 flow to grid and the transistor T R2 collector electrode of transistor T R1.In voltage just moment of input, because the charging effect of capacitor C makes the electric current shunting, and voltage-stabiliser tube D1 fails to reach conducting voltage, is in off state temporarily, makes transistor T R1 also be in off state, thereby also can not produce peak current at once.Have only the capacitor C of working as to be charged to certain voltage, after the voltage-stabiliser tube D1 conducting, the voltage of brilliant utmost point pipe TR2 collector electrode raises, and promptly makes the grid voltage of field effect transistor TR1 uprise, thereby conducting, the length of this time can be by controlling choosing of voltage-stabiliser tube D1 conducting voltage size; The principle of others is identical with Fig. 1.Therefore oxide-semiconductor control transistors conducting again when input current and voltage are stablized can be come by selection, thereby the starting characteristic of this circuit can be improved greatly capacitor C, voltage-stabiliser tube D1 and resistance R 1, R2 parameter size.Simultaneously, the voltage that yet can guarantee to be added on transistor T R1 grid, the TR2 base stage can not surpass its limiting value.
As shown in Figure 3, present embodiment two is basic identical with composition and the operation principle of embodiment one, difference is the soft start loop, this soft start loop is made up of resistance R 1, voltage stabilizing didoe D1, diode D2 and capacitor C 3, resistance R 1 is connected with the negative electrode of voltage stabilizing didoe D1, and the anode of voltage stabilizing didoe D1 connects the anode of diode D2, and the negative electrode of diode D2 connects serial connection point A, one end of capacitor C 3 is connected between the negative electrode of resistance R 1 and voltage stabilizing didoe D1, its other end ground connection.
When circuit input end adds voltage, after capacitor C filtering, electric current 1 pair of capacitor C of resistance R, 3 chargings of flowing through; In a bit of time of voltage input just, because capacitor C 3 is in charged state, thus not conducting immediately of field effect transistor TR1 at this moment, thus can not produce peak current yet; Have only the capacitor C 3 of working as to be charged to certain voltage, after the voltage-stabiliser tube D1 conducting, the voltage of brilliant utmost point pipe TR2 collector electrode raises, and promptly makes the grid voltage of field effect transistor TR1 uprise, thus conducting.So also can reach the effect of soft start, thereby protective transistor TR1, TR2 reach identical effect.
Claims (3)
1, a kind of isolated self-oscillation reverse exciting inverter of realizing soft start, comprise coupling transformer (T), field effect transistor (TR1), brilliant utmost point pipe (TR2) and the photoelectricity coupling of vibrating isolated feedback device (OP), circuit input end connects the source electrode of field effect transistor (TR1) through the primary coil (P1) of coupling transformer (T), circuit input end is connected the collector electrode of brilliant utmost point pipe (TR2) through resistance (R1) and resistance (R2), the grid of field effect transistor (TR1) is connected with the collector electrode of brilliant utmost point pipe (TR2), the drain electrode one tunnel of field effect transistor (TR1) is through resistance (R4) ground connection, another road is connected the base stage of brilliant utmost point pipe (TR2) through the resistance (R3) and the doublet of electric capacity (C2), and the base stage of brilliant utmost point pipe (TR2) connects the output of the secondary output winding (P3) of coupling transformer (T) through photoelectricity coupling isolated feedback device (OP); Serial connection point (A) between described resistance (R1) and the resistance (R2) is through secondary winding (P2) ground connection of speed-up capacitor (C1), coupling transformer (T); It is characterized in that: be connected with the loop that is used to realize the circuit soft start between described circuit input end and the serial connection point (A).
2, the isolated self-oscillation reverse exciting inverter of realizing soft start according to claim 1, it is characterized in that: described soft start loop is made up of resistance (R1) and voltage stabilizing didoe (D1), resistance (R1) is connected with the negative electrode of voltage stabilizing didoe (D1), and the anode of voltage stabilizing didoe (D1) is connected with serial connection point (A).
3, the isolated self-oscillation reverse exciting inverter of realizing soft start according to claim 1, it is characterized in that: described soft start loop is made up of resistance (R1), voltage stabilizing didoe (D1), diode (D2) and electric capacity (C3), resistance (R1) is connected with the negative electrode of voltage stabilizing didoe (D1), the anode of voltage stabilizing didoe (D1) connects the anode of diode (D2), the negative electrode of diode (D2) connects serial connection point (A), one end of electric capacity (C3) is connected between the negative electrode of resistance (R1) and voltage stabilizing didoe (D1), its other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420042922 CN2686205Y (en) | 2004-02-26 | 2004-02-26 | Isolating self-oscillating antiviolent inverter capable of realizing soft starting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420042922 CN2686205Y (en) | 2004-02-26 | 2004-02-26 | Isolating self-oscillating antiviolent inverter capable of realizing soft starting |
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| Publication Number | Publication Date |
|---|---|
| CN2686205Y true CN2686205Y (en) | 2005-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420042922 Expired - Lifetime CN2686205Y (en) | 2004-02-26 | 2004-02-26 | Isolating self-oscillating antiviolent inverter capable of realizing soft starting |
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| CN (1) | CN2686205Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111244087A (en) * | 2020-01-20 | 2020-06-05 | 电子科技大学 | Field-effect charging type semiconductor starting device integrating polysilicon resistor and diode |
-
2004
- 2004-02-26 CN CN 200420042922 patent/CN2686205Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111244087A (en) * | 2020-01-20 | 2020-06-05 | 电子科技大学 | Field-effect charging type semiconductor starting device integrating polysilicon resistor and diode |
| CN111244087B (en) * | 2020-01-20 | 2023-03-14 | 电子科技大学 | Field-effect charging type semiconductor starting device integrating polysilicon resistor and diode |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Patentee address after: 510665, 2 floor, 6 Industrial Park, Huang Yi Road, Guangzhou, Guangdong, Tianhe District Patentee address before: 8 building, 8 building, Huang Zhou Industrial Zone, Guangzhou, Guangdong, Tianhe District 510660, China |
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| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140226 Granted publication date: 20050316 |