CN202364108U - Drive circuit - Google Patents
Drive circuit Download PDFInfo
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- CN202364108U CN202364108U CN2011205186757U CN201120518675U CN202364108U CN 202364108 U CN202364108 U CN 202364108U CN 2011205186757 U CN2011205186757 U CN 2011205186757U CN 201120518675 U CN201120518675 U CN 201120518675U CN 202364108 U CN202364108 U CN 202364108U
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- 239000004065 semiconductor Substances 0.000 claims abstract description 7
- 239000003990 capacitor Substances 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 229910044991 metal oxide Inorganic materials 0.000 abstract 1
- 150000004706 metal oxides Chemical class 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 abstract 1
- 230000035772 mutation Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Abstract
A drive circuit consists of a driving part, a level conversion part and an out switch part, wherein the out switch part mainly comprises triodes Q2 and Q4; the emitting electrode of the triode Q2 is connected with the output terminal of the out switch part after being sequentially connected in series with resistor R5 and R6; the emitting electrode of the triode Q4 is connected with the output terminal of the out switch part after being sequentially connected in series with resistor R7 and R6; the base electrodes of the triode Q2 and Q4 are connected with the output terminal of the level conversion part; the output terminal of the driving part is connected with the collecting electrode of the triode Q2 through a diode D1; the collecting electrode of the triode Q4 is connected with the output terminal of the out switch part after being sequentially connected with a diode D2 and a resistor R8; and the negative pole of the diode D2 is connected with the resistor R8 and a negative power supply-V respectively. The drive circuit is used for an MOS (Metal Oxide Semiconductor) tube or an IGBT (Insulated-Gate Bipolar Transistor), and the rising and descending time periods of a switch are shorter when the drive circuit is used for driving the two switch tubes, so that the switching loss is reduced.
Description
Technical field
The utility model relates to drive circuit, in particular for the driving of metal-oxide-semiconductor or IGBT.
Background technology
In recent years; Novel device for power switching IGBT is familiar with by people gradually; Compared with former various power electronic device; IGBT occupies remarkable advantages at present aspect combination property, and just more and more to come many operating frequencies that are applied to be that tens kilo hertzs, power output are in several kilowatts to tens kilowatts all kinds of electric power variation devices.
The dynamic driving ability is strong, can the driving pulse with precipitous front and back be provided for the IGBT grid.When IGBT works under the hard switching mode, can open and turn off process in produce bigger loss, this process is long more, switching loss is big more.When the device operating frequency was higher, switching loss even can substantially exceed the IGBT on-state loss caused the tube core temperature rise higher.Switching frequency and the fan-out capability of the big limitations IGBT of this situation meeting, the trouble free service to IGBT constitutes very big threat simultaneously.
Summary of the invention
The utility model technical problem to be solved provides a kind of drive circuit, and actuating speed is high, and power saving is with low cost.
For solving the problems of the technologies described above; The technical scheme of the utility model is: a kind of drive circuit; Constitute by drive part, level converting section and output switching part; Said output switching part mainly comprises triode Q2 and triode Q4, and the emitter of said triode Q2 is connected with the output of output switching part with resistance R 5, R6 series connection back successively, and the emitter of said triode Q4 is connected with the output of output switching part with resistance R 7, R6 series connection back successively; The base stage of said triode Q2, Q4 all is connected with the output of said level converting section; The output of said drive part is connected with the collector electrode of said triode Q2 through diode D1, and the anode of diode D1 is connected with drive part, and negative electrode is connected with triode Q2 collector electrode; The collector electrode of said triode Q4 is connected with the output of output switching part through diode D2, resistance R 8 backs successively, and the anode of diode D2 is connected with the collector electrode of triode Q4, and negative electrode is connected with negative supply-V with resistance R 8 respectively.
When giving the base stage input+V level of triode Q2 and Q4; Triode Q2 conducting; The pressure drop of 0.7V is arranged on diode D1 this moment; At this moment the high 0.7V of voltage of the voltage ratio emitter of the base stage of triode Q2 can guarantee the complete conducting of triode Q2 like this, the electric output voltage of output switching part be (+V-0.7V); The effect of diode D2 is identical with diode D1, when giving the base stage input-V level of triode Q2 and Q4, and triode Q4 conducting, the electric output voltage of output switching part is (V-0.7V).
As improvement; Said drive part mainly comprises triode Q1 and triode Q3, and the input of drive part is connected with the base stage of triode Q1 through resistance R 1, between resistance R 1 and triode Q1, is connected with capacitor C 1 and resistance R 11; Capacitor C 1 one ends are connected with the base stage of triode Q1; Other end ground connection, resistance R 11 1 ends are connected other end ground connection with the base stage of triode Q1; The collector electrode of said triode Q1 is connected the grounded emitter of triode Q1 through resistance R 2 with the base stage of said triode Q3; The emitter of triode Q3 is connected with positive supply+V, and the collector electrode of triode Q3 is connected with the anode of said diode D1, is provided with capacitor C 2 between said triode Q3 and the diode Q1, and said capacitor C 2 one ends are connected other end ground connection with the collector electrode of triode Q3.When the input input mutation voltage of drive part, because the sound equipment of burr, the circuit noise can be bigger, and the capacitor C 1 in this circuit plays filter action, effectively removes the burr of mutation voltage, and the circuit noise is reduced.
As improvement, said level converting section mainly comprises voltage comparator Z5A, and the input of said level converting section is connected with the in-phase end of voltage comparator Z5A through resistance R 3, and the end of oppisite phase of voltage comparator Z5A divider resistance R9, R10 respectively connects; The output of said voltage comparator Z5A is connected with the base stage of said triode Q2, Q4 respectively, and the output of said voltage comparator Z5A is connected with the collector electrode of triode Q3 through resistance R 4; The positive supply pin of voltage comparator Z5A is through capacitor C 3 ground connection, and the positive supply pin of voltage comparator Z5A is connected with the collector electrode of triode Q3; The negative supply pin of voltage comparator Z5A is through capacitor C 4 ground connection.Adopt voltage comparator to make level conversion, drive output switch triode conducting and end thereby convert Transistor-Transistor Logic level to positive and negative driving voltage.
As improvement, the output of said output switching part is connected with metal-oxide-semiconductor or IGBT.
The beneficial effect that the utility model is compared with prior art brought is:
The utility model is to the drive circuit of metal-oxide-semiconductor or IGBT pipe, and during to the driving of these two kinds of switching tubes, the rise and fall of switch will be lacked along the time, and switching loss just can reduce like this; Next does not cause interference, the own power saving of drive circuit when working in addition to the ground wire of circuit when switch; The forward voltage of drive circuit takes the independent control mode wink letter electronic noise of can avoiding starting shooting that switching tube is produced misoperation, also can cooperate the level detection function drive circuit to be carried out actions such as switching on and shutting down.
Description of drawings
Fig. 1 is a circuit diagram of the present invention.
Embodiment
Below in conjunction with Figure of description the utility model is described further.
As shown in Figure 1, a kind of drive circuit is made up of drive part, level converting section and output switching part, and the output of said output switching part is connected with metal-oxide-semiconductor or IGBT.
Said output switching part mainly comprises triode Q2 and triode Q4; The emitter of said triode Q2 is connected with the output C of output switching part with resistance R 5, R6 series connection back successively, and the emitter of said triode Q4 is connected with the output C of output switching part with resistance R 7, R6 series connection back successively; The base stage of said triode Q2, Q4 all is connected with the output of said level converting section; The output of said drive part is connected with the collector electrode of said triode Q2 through diode D1, and the anode of diode D1 is connected with drive part, and negative electrode is connected with triode Q2 collector electrode; The collector electrode of said triode Q4 is connected with the output C of output switching part through diode D2, resistance R 8 backs successively, and the anode of diode D2 is connected with the collector electrode of triode Q4, and negative electrode is connected with negative supply-V with resistance R 8 respectively.When giving the base stage input+V level of triode Q2 and Q4; Triode Q2 conducting; The pressure drop of 0.7V is arranged on diode D1 this moment; At this moment the high 0.7V of voltage of the voltage ratio emitter of the base stage of triode Q2 can guarantee the complete conducting of triode Q2 like this, the electric output voltage of output switching part be (+V-0.7V); The effect of diode D2 is identical with diode D1, when giving the base stage input-V level of triode Q2 and Q4, and triode Q4 conducting, the electric output voltage of output switching part is (V-0.7V).
Said drive part mainly comprises triode Q1 and triode Q3; The input A of drive part is connected with the base stage of triode Q1 through resistance R 1; Between resistance R 1 and triode Q1, be connected with capacitor C 1 and resistance R 11, capacitor C 1 one ends are connected other end ground connection with the base stage of triode Q1; Resistance R 11 1 ends are connected other end ground connection with the base stage of triode Q1; The collector electrode of said triode Q1 is connected the grounded emitter of triode Q1 through resistance R 2 with the base stage of said triode Q3; The emitter of triode Q3 is connected with positive supply+V, and the collector electrode of triode Q3 is connected with the anode of said diode D1, is provided with capacitor C 2 between said triode Q3 and the diode Q1, and said capacitor C 2 one ends are connected other end ground connection with the collector electrode of triode Q3.When the input A of drive part input mutation voltage, because the sound equipment of burr, the circuit noise can be bigger, and the capacitor C 1 in this circuit plays filter action, effectively removes the burr of mutation voltage, and the circuit noise is reduced.
Said level converting section mainly comprises voltage comparator Z5A, and the input B of said level converting section is connected with the in-phase end of voltage comparator Z5A through resistance R 3, and the end of oppisite phase of voltage comparator Z5A divider resistance R9, R10 respectively connects; The output of said voltage comparator Z5A is connected with the base stage of said triode Q2, Q4 respectively, and the output of said voltage comparator Z5A is connected with the collector electrode of triode Q3 through resistance R 4; The positive supply pin of voltage comparator Z5A is through capacitor C 3 ground connection, and the positive supply pin of voltage comparator Z5A is connected with the collector electrode of triode Q3; The negative supply pin of voltage comparator Z5A is through capacitor C 4 ground connection.Adopt voltage comparator to make level conversion, drive output switch triode conducting and end thereby convert Transistor-Transistor Logic level to positive and negative driving voltage.
The utility model is to the drive circuit of metal-oxide-semiconductor or IGBT pipe, and during to the driving of these two kinds of switching tubes, the rise and fall of switch will be lacked along the time, and switching loss just can reduce like this; Next does not cause interference, the own power saving of drive circuit when working in addition to the ground wire of circuit when switch; The forward voltage of drive circuit takes the independent control mode wink letter electronic noise of can avoiding starting shooting that switching tube is produced misoperation, also can cooperate the level detection function drive circuit to be carried out actions such as switching on and shutting down.
Claims (4)
1. drive circuit; Constitute by drive part, level converting section and output switching part; It is characterized in that: said output switching part mainly comprises triode Q2 and triode Q4; The emitter of said triode Q2 is connected with the output of output switching part with resistance R 5, R6 series connection back successively, and the emitter of said triode Q4 is connected with the output of output switching part with resistance R 7, R6 series connection back successively; The base stage of said triode Q2, Q4 all is connected with the output of said level converting section; The output of said drive part is connected with the collector electrode of said triode Q2 through diode D1, and the anode of diode D1 is connected with drive part, and negative electrode is connected with triode Q2 collector electrode; The collector electrode of said triode Q4 is connected with the output of output switching part through diode D2, resistance R 8 backs successively, and the anode of diode D2 is connected with the collector electrode of triode Q4, and negative electrode is connected with negative supply-V with resistance R 8 respectively.
2. a kind of drive circuit according to claim 1; It is characterized in that: said drive part mainly comprises triode Q1 and triode Q3, and the input of drive part is connected with the base stage of triode Q1 through resistance R 1, between resistance R 1 and triode Q1, is connected with capacitor C 1 and resistance R 11; Capacitor C 1 one ends are connected with the base stage of triode Q1; Other end ground connection, resistance R 11 1 ends are connected other end ground connection with the base stage of triode Q1; The collector electrode of said triode Q1 is connected the grounded emitter of triode Q1 through resistance R 2 with the base stage of said triode Q3; The emitter of triode Q3 is connected with positive supply+V, and the collector electrode of triode Q3 is connected with the anode of said diode D1, is provided with capacitor C 2 between said triode Q3 and the diode Q1, and said capacitor C 2 one ends are connected other end ground connection with the collector electrode of triode Q3.
3. a kind of drive circuit according to claim 1; It is characterized in that: said level converting section mainly comprises voltage comparator Z5A; The input of said level converting section is connected with the in-phase end of voltage comparator Z5A through resistance R 3, and the end of oppisite phase of voltage comparator Z5A divider resistance R9, R10 respectively connects; The output of said voltage comparator Z5A is connected with the base stage of said triode Q2, Q4 respectively, and the output of said voltage comparator Z5A is connected with the collector electrode of triode Q3 through resistance R 4; The positive supply pin of voltage comparator Z5A is through capacitor C 3 ground connection, and the positive supply pin of voltage comparator Z5A is connected with the collector electrode of triode Q3; The negative supply pin of voltage comparator Z5A is through capacitor C 4 ground connection.
4. a kind of drive circuit according to claim 1 is characterized in that: the output of said output switching part is connected with metal-oxide-semiconductor or IGBT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205186757U CN202364108U (en) | 2011-12-10 | 2011-12-10 | Drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205186757U CN202364108U (en) | 2011-12-10 | 2011-12-10 | Drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202364108U true CN202364108U (en) | 2012-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205186757U Expired - Fee Related CN202364108U (en) | 2011-12-10 | 2011-12-10 | Drive circuit |
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| Country | Link |
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| CN (1) | CN202364108U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102497183A (en) * | 2011-12-10 | 2012-06-13 | 陈清娇 | Driving circuit |
| CN111030077A (en) * | 2019-12-23 | 2020-04-17 | 中国电子科技集团公司第十八研究所 | Shunt regulation circuit for solar cell array switch and regulation method based on shunt regulation circuit |
-
2011
- 2011-12-10 CN CN2011205186757U patent/CN202364108U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102497183A (en) * | 2011-12-10 | 2012-06-13 | 陈清娇 | Driving circuit |
| CN111030077A (en) * | 2019-12-23 | 2020-04-17 | 中国电子科技集团公司第十八研究所 | Shunt regulation circuit for solar cell array switch and regulation method based on shunt regulation circuit |
| CN111030077B (en) * | 2019-12-23 | 2021-08-13 | 中国电子科技集团公司第十八研究所 | Shunt regulation circuit for solar cell array switch and regulation method based on shunt regulation circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120801 Termination date: 20151210 |
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| EXPY | Termination of patent right or utility model |