CN2699577Y - Isolating driver for insulated gate power tube - Google Patents
Isolating driver for insulated gate power tube Download PDFInfo
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- CN2699577Y CN2699577Y CN 200320102852 CN200320102852U CN2699577Y CN 2699577 Y CN2699577 Y CN 2699577Y CN 200320102852 CN200320102852 CN 200320102852 CN 200320102852 U CN200320102852 U CN 200320102852U CN 2699577 Y CN2699577 Y CN 2699577Y
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- 238000002955 isolation Methods 0.000 claims abstract description 25
- 230000008878 coupling Effects 0.000 claims abstract description 21
- 238000010168 coupling process Methods 0.000 claims abstract description 21
- 238000005859 coupling reaction Methods 0.000 claims abstract description 21
- 239000003990 capacitor Substances 0.000 claims description 14
- 229910000859 α-Fe Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 230000000630 rising effect Effects 0.000 description 5
- 241001270131 Agaricus moelleri Species 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000007600 charging Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The utility model relates to the drive of a power device, and provides a driver for an insulated gate power device with an isolating transformer and extensively variable output duty ratio. The driver is composed of an isolating coupling transformer 1, a self-contained source of power 2, a prepositive unit 3 and an amplifying unit 4. The transformer provides isolation, the self-contained source of power receives energy transferred by the input signals at a flat topping stage, the prepositive unit provides level compensation, and the amplifying unit magnifies and outputs the modulating signals in the input signals. The utility model has simple circuit with no need to arrange any auxiliary power supply devices, and the drive pulse with determined amplitude and steep front and back edges can be output. The utility model is especially applicable for the drive of the high power valve in the single ended converter.
Description
Technical field
The utility model belongs to the power tube Driving technique field in the Switching Power Supply, the particularly driving of the insulation bar power tube in the single-ended converter.
Background technology
The design one of high power device driver (drive circuit) is to being one of key technology of field of power supplies in the Switching Power Supply.For VM0S field-effect transistor and IGBT gated transistor, they have the grid structure of insulation, thereby the static drive power interface is bordering on zero.But because they have bigger grid capacitance Cgs and because Miller effect is amplified the capacitance of drain Cdg be transformed into grid, thereby need bigger dynamic driving power.To the higher designing requirement of driver, just be to use as far as possible simple circuit configuration, satisfy simultaneously its moment than high current drive capability.
When PWM or PFM rectangular pulse modulation signal and power device need be isolated, two kinds of methods are generally arranged: adopt photoelectrical coupler, or utilize pulse transformer that electrical isolation is provided.
Photoelectrical coupler has two shortcomings: react slower, and the accessory power supply that needs to isolate is powered.
At present drive the insulated-gate high-power pipe and the method band self-supporting power roughly has two kinds with transformer.First method is to adopt the method for hyperfrequency modulation, promptly uses the hyperfrequency that is higher than pwm signal tens overtones bands as carrier frequency, delivers to the elementary of transformer after modulating with pwm signal; Secondary at transformer, carrier frequency transmits energy, and the pwm signal after the demodulation is used for the driving power pipe.Typical circuit as shown in Figure 1, wherein UC3724/5 is that the pwm signal hyperfrequency modulation transmission/reception drive integrated circult produced of U.S. Unitrode company is right, T3 is driven insulation bar power tube.This method effect is fine, does not need insulating power supply, can transmit the pwm signal of upper frequency, both can drive single-end circuit, also can drive double end converter.Shortcoming is the circuit complexity, and cost is higher.
Second method is that the same inventor of the utility model provides in the Chinese patent CN2255696Y that has obtained " simple high-efficiency separated insulated-gate high-power component driving circuit ", this method is very effective, very convenient and practical when driving double-end converter such as full-bridge or half-bridge, have isolation, at a high speed, do not need the advantage of accessory power supply.But be applied to normal shock or anti-when single-ended converter such as swashing, because transformer can only transmit AC signal, isolating transformer is delivered to secondary signal, and its signal amplitude is linear change with duty ratio, therefore for keeping essentially identical output amplitude, only be suitable under the duty ratio about 50%, working.
Summary of the invention
The purpose of this utility model provides a kind of driver for isolating that is specially adapted to single-ended converter, not only circuit is simple, cheap, and do not need accessory power supply, and can under the duty ratio of wide variation, work, output has the driving pulse on low delay and precipitous triggering edge.
The technical solution of the utility model is:
Driver is made up of isolation coupling unit (1), self-supporting power (2), preposition unit (3) and amplifying unit (4), wherein:
Isolation coupling unit (1) is made of capacitance C1 and miniature ferrite pulse transformer B1, and its effect is the isolated DC level, receive the PWM modulation signal of input and electrical isolation between input and output is provided; The right-hand member of C1 links to each other with the elementary upper end of B1, and the elementary lower end of the left end of C1 and B1 is the input Vi1 of this unit, and input signal adds here, and the lower end of B1 level is common port COM, and the upper end is the output end vo 1 of isolation coupling unit (1).
Self-supporting power (2) is formed half-wave voltage multiplying rectifier filter by diode D1, D2 and capacitor C 2, C3, and its effect is that the signal that export isolation coupling unit (1) is carried out energy process, i.e. rectification and filtering provide amplifying unit (4) required energy; The left end of C2 is the input Vi2 of self-supporting power unit 2, links to each other with the output end vo 1 of isolation coupling unit (1); The positive pole of the right-hand member of C2 and the negative pole of D1 and D2 links together; The positive pole of D1 and the lower end of C3 connect together and are common port COM; The negative pole of D2 is connected the output end vo 2 of back as self-supporting power (2) with the upper end of C3.
Preposition unit (3) is made up of capacitor C 4 and diode D3, and the effect of this unit is the signal that export isolation coupling unit (1) to be carried out amplitude handle, and distributes the driving pulse of appropriate level for the triode in the amplifying unit (4).The left end of C4 links to each other with the output end vo 1 of isolation coupling unit (1) as the input Vi3 of preposition unit (3), and the positive pole of D3 is as common port COM, and the right-hand member of C4 is connected the output end vo 3 of back as preposition unit (3) with the negative pole of D3; As required, also can be on C4 the bleeder resistance R1 of a high value in parallel, it is worth generally greater than 1M.
Amplifying unit (4) be a kind of by triode T1 and, the active plug-type amplifying circuit formed of T2, its effect is that the pwm signal that will receive is amplified, in order to driving insulated-gate power device (5); Input Vi4 as this unit after the base stage of NPN pipe T1 and PNP pipe T2 is connected links to each other with the output end vo 3 of preposition unit (3), the collector electrode of T1 pipe links to each other with the output end vo 2 of self-supporting power (2) as the power end Vcc of this unit, the collector electrode of T2 pipe is as common port COM, T1 and T2 penetrate level and are connected together as the output end vo 4 of this unit, and it also is the utility model output end of driver certainly.Load unit (5) is driven VMOS pipe, and its grid G links to each other with the output end vo 4 of amplifying unit (4), and its source electrode also is common port COM.The common port COM of unit 1 to 5 connects together.In amplifying unit (4), triode T1 and T2 constitute complementary plug-type amplifying circuit, and two Guan Jun work in the emitter follower state.
The pulse signal of prime is added in the input Vi1 of isolation coupling unit (1), and the output end vo 1 of isolation coupling unit (1) links to each other with the input Vi2 of self-supporting power (2) and the input Vi3 of preposition unit (3); The output end vo 2 of self-supporting power (2) is received the power end Vcc of amplifying unit (4); The output end vo 3 of preposition unit (3) links to each other with the input Vi4 of amplifying unit (4); The output end vo 4 of amplifying unit (4) links to each other with the grid of driven insulated-gate power device (5); Unit (1
-5) common port COM connects together.
The rectangular pulse modulation signal of driver prime output is added in the input Vi1 of isolation coupling unit (1), remove direct current by capacitance C1 after, be added in the elementary of transformer B1, after transformer B1 electrical isolation by secondary output.Modulation intelligence in the output pulse signal (being the rising edge and the trailing edge information of rectangular pulse) is exaggerated unit (4) reception and amplifies the back in order to drive insulated-gate power device (5) after handle preposition unit (3); Most of energy of pulse signal is received the back in the flat-top stage of rectangular pulse by self-supporting power (2) and uses for amplifying unit (4).
Compare with existing single-ended drive technology, the utility model has the advantages that:
[1]. do not need independent power supply;
[2]. the work duty ratio is wide, can reach 2～98%;
[3]. circuit is simple, and the time of delay of driving is very short;
[4]. output stage belongs to active push-pull structure, thereby has precipitous rising edge and trailing edge.
Description of drawings
Fig. 1 is to use the driver principles figure of U.S. Unitrode company hyperfrequency modulation technique.
Fig. 2 is an embodiment of the present utility model.
Embodiment
Indefiniteness embodiment below in conjunction with accompanying drawing 2 is described in further detail the utility model.
(1) is the isolation coupling unit among the figure, and (2) are the self-supporting power unit, and (3) are preposition unit, and (4) are amplifying unit.This four part of unit (1～4) has been formed complete circuit of the present utility model.The secondary output end Vo1 of isolation coupling unit (1) links the input Vi2 of self-supporting power (2) and the input Vi3 of preposition unit (3), the output end vo 2 of self-supporting power (2) links to each other with the power end Vcc of amplifying unit (4), the output end vo 3 of preposition unit (3) links to each other with the input Vi4 of amplifying unit (4), and the common port COM of unit (1～4) connects together.
Each cell operation principle is as follows in the driver:
[1], the waveform situation of isolation coupling unit (1)
The signal that is added in the input Vi1 of isolation coupling unit (1) generally all is the unidirectional pulsation square wave on the left side among Fig. 2, and be the minimum point of waveform zero point; Since capacitor C 1 every straight effect, being applied to that the elementary signal of transformer B1 becomes among the figure with the horizontal dotted line is the waveform of zero-base point.If the no-load voltage ratio of transformer B1 is 1, then the waveform of transformer B1 output end vo 1 is identical with input.If the amplitude of the input waveform of input Vi1 is Vm, power tube T3 conducting ends during low level during high level; Signal period is T, and the duty ratio of conducting is D, and then the high level width is Ton=DT, and low level width is Toff=(1-D) T; The high level amplitude of transformer B1 output end vo 1 output is (1-D) Vm, and the low level amplitude of output is-DVm.
[2], the work of self-supporting power (2)
Present embodiment is typical half-wave voltage doubler.During operate as normal, maintain the slightly direct voltage of ripple on its output end vo 2 that is the capacitor C 3, its value is a little less than the peak-to-peak value Vm of the secondary output end Vo1 output signal of pulse transformer B1.
Voltage doubling rectifing circuit is a kind of of electric capacity rectification circuit, and the condenser type rectification circuit belongs to peak rectifier circuit, and promptly rectifier diode only just begins conducting during near peak value at input voltage.In the initial stage and the mid-term of input signal trailing edge, not conducting of diode D1, transformer B1 output signal is added on the input Vi4 of amplifying unit (4) by level compensation capacitor C 4, produces to turn-off driving pulse, switch-off power pipe T3.In the latter stage and the flat-top phase of input signal trailing edge, the D1 conducting gives capacitor C 2 chargings.In the initial stage and the mid-term of input signal rising edge, not conducting of diode D2, the output signal of transformer B1 is added on the input Vi4 of amplifying unit (4) by level compensation capacitor C 4, produces and opens driving pulse, opens power tube T3.In the latter stage and the flat-top phase of input signal rising edge, the D2 conducting gives capacitor C 3 chargings.
Just opening at the beginning or during switch-off power pipe T3, rectifier diode D1 and D2 are not conductings, and signal source is only transmitted a triggering signal by transformer B1, is sent to amplifying unit (4) through preposition unit (3).Amplifying unit (4) is opened or the energy of switch-off power pipe T3 is to utilize to be stored in the electric charge on the capacitor C 3 in the self-supporting power (2).In the rising of signal source (or decline) along latter stage and flat-top phase, self-supporting power (2) work, the electric charge on the C3 is this storage in period.
[3], the operation principle of preposition unit (3)
Because the duty ratio D of modulating input signal is variable, so amplitude (1-D) Vm and the DVm of the high-low level pulse signal of transformer B1 output also change, can't satisfy the requirement of driving, therefore need replenishing of a level, make that when the duty ratio D of modulating input signal changes the high-low level pulse of delivering to amplifying unit (4) input all has enough and fixing amplitude.Capacitor C 4 and diode D3 can satisfy this requirement just, and when transformer B1 output low level (negative level), positive negative voltage DVm in a left side in the right side on the capacitor C 4 is kept in the D3 conducting.The voltage of voltage on the capacitor C 4 and transformer B1 output is superimposed, on the output end vo 3 of preposition unit (3), equals Vm when just in time being positive pulse, equals zero during negative pulse.
[4], the operation principle of amplifying unit (4)
This is most typical complementary type emitter follower structure, need not to give unnecessary details.
Claims (1)
1. isolated insulated-gate power device driver, it is made up of isolation coupling unit (1), self-supporting power (2), preposition unit (3) and amplifying unit (4), it is characterized in that:
The output end vo 1 of isolation coupling unit (1) links to each other with the input Vi3 of the input Vi2 of self-supporting power (2), preposition unit (3), the output end vo 2 of self-supporting power (2) links to each other with the power end Vcc of amplifying unit (4), the output end vo 3 of preposition unit (3) links to each other with the input Vi4 of amplifying unit (4), the grid of driven high power valve T3 in the output end vo 4 of amplifying unit (4) and the load unit (5) links to each other, and the common port COM of all each unit connects together;
Isolation coupling unit (1) is made up of capacitance C1 and miniature ferrite transformer B1, the right-hand member of C1 links to each other with the elementary upper end of B1, the input Vi1 of this unit is left end and the elementary lower end of B1 of C1, the lower end of B1 level is common port COM, and the upper end is the output end vo 1 of isolation coupling unit (1);
Self-supporting power (2) is formed half-wave voltage doubler by diode D1, D2 and capacitor C 2, C3; The left end of C2 is the input Vi2 of self-supporting power (2), links to each other with the output end vo 1 of isolation coupling unit (1), and the positive pole of the right-hand member of C2 and the negative pole of D1 and D2 links together; The positive pole of D1 and the lower end of C3 connect together and are common port COM; The negative pole of D2 is connected the output end vo 2 of back as self-supporting power (2) with the upper end of C3;
Preposition unit (3) is made up of capacitor C 4 and diode D3, the left end of C4 links to each other with the output end vo 1 of isolation coupling unit (1) as the input Vi3 of preposition unit (3), the positive pole of D3 is as common port COM, and the right-hand member of C4 is connected the output end vo 3 of back as preposition unit (3) with the negative pole of D3;
Amplifying unit (4) by triode T1 and, T2 forms, input Vi4 as this unit after the base stage of NPN pipe T1 and PNP pipe T2 is connected links to each other with the output end vo 3 of preposition unit (3), the collector electrode of T1 pipe links to each other with the output end vo 2 of self-supporting power (2) as the power end Vcc of this unit, the collector electrode of T2 pipe is as common port COM, T1 and T2 penetrate level and are connected together as the output end vo 4 of this unit, and it also is the utility model output end of driver certainly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320102852 CN2699577Y (en) | 2003-11-06 | 2003-11-06 | Isolating driver for insulated gate power tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320102852 CN2699577Y (en) | 2003-11-06 | 2003-11-06 | Isolating driver for insulated gate power tube |
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| Publication Number | Publication Date |
|---|---|
| CN2699577Y true CN2699577Y (en) | 2005-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320102852 Expired - Fee Related CN2699577Y (en) | 2003-11-06 | 2003-11-06 | Isolating driver for insulated gate power tube |
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| CN (1) | CN2699577Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101483391A (en) * | 2007-11-29 | 2009-07-15 | 意法半导体股份有限公司 | Self-supply circuit and method for a voltage converter |
| CN1909372B (en) * | 2005-08-01 | 2012-04-25 | 美国芯源系统股份有限公司 | Isolated gate driver circuit for power switching devices |
| CN102522978A (en) * | 2012-01-06 | 2012-06-27 | 河南华南医电科技有限公司 | Isolation type power transistor driver |
| CN102790609A (en) * | 2011-05-17 | 2012-11-21 | 北京落木源电子技术有限公司 | Drive of insulated gate power tube |
-
2003
- 2003-11-06 CN CN 200320102852 patent/CN2699577Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1909372B (en) * | 2005-08-01 | 2012-04-25 | 美国芯源系统股份有限公司 | Isolated gate driver circuit for power switching devices |
| CN101483391A (en) * | 2007-11-29 | 2009-07-15 | 意法半导体股份有限公司 | Self-supply circuit and method for a voltage converter |
| CN101483391B (en) * | 2007-11-29 | 2013-06-19 | 意法半导体股份有限公司 | Self-supply circuit and method for a voltage converter |
| CN102790609A (en) * | 2011-05-17 | 2012-11-21 | 北京落木源电子技术有限公司 | Drive of insulated gate power tube |
| CN102790609B (en) * | 2011-05-17 | 2014-12-31 | 北京落木源电子技术有限公司 | Drive of insulated gate power tube |
| CN102522978A (en) * | 2012-01-06 | 2012-06-27 | 河南华南医电科技有限公司 | Isolation type power transistor driver |
| CN102522978B (en) * | 2012-01-06 | 2013-08-07 | 河南华南医电科技有限公司 | Isolation type power transistor driver |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING LUOMUYUAN ELECTRONIC TECHNOLOGY CO. LTD Free format text: FORMER OWNER: LI XIZHEN Effective date: 20060127 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20060127 Address after: 100044, No. 29, building No. 19, sorghum oblique street, Haidian District, Beijing, 301 Patentee after: Beijing LMY Electronics Co., Ltd. Address before: 100088 Beijing City, Haidian District Wen Hui Bei yuan building 2 door 203 Patentee before: Li Xizhen |
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Addressee: Chen Yaning Document name: payment instructions |
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| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Chen Yaning Document name: Notification of Termination of Patent Right |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |