CN104202027A - High-power IGBT (insulated gate bipolar transistor) driver - Google Patents
High-power IGBT (insulated gate bipolar transistor) driver Download PDFInfo
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- CN104202027A CN104202027A CN201410491443.5A CN201410491443A CN104202027A CN 104202027 A CN104202027 A CN 104202027A CN 201410491443 A CN201410491443 A CN 201410491443A CN 104202027 A CN104202027 A CN 104202027A
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Abstract
The invention relates to a high-power IGBT (insulated gate bipolar transistor) driver. A wire passes the centers of all of n transformers and serves as a primary winding for the n transformers. Each transformer comprises a secondary winding independent. Winding directions of the secondary windings are identical; the secondary windings are equal in the number of turns. The secondary windings are all connected in parallel. The secondary windings of the transformers are parallelly connected for outputting; great instantaneous output current can be provided; load carrying capacity is high; a distribution parameter is diminished; wide and narrow pushes are both considered; an IGBT can be on or off at higher speed; on and off loss of the IGBT is reduced. A drive circuit and a main circuit are isolated through the transformers; reliability of the drive circuit is greatly enhanced; damage of the drive circuit caused by failure of the main circuit is effectively prevented. Devices in secondary winding loops are all passive devices, no auxiliary power is required, the circuits are simple, fewer devices are used, circuit complexity is reduced, and parasitic interference is avoided.
Description
Technical field
The present invention relates to a kind of driver, relate in particular to a kind of high-power IGBT driver.
Background technology
Insulated gate bipolar transistor (IGBT) has high withstand voltage, large electric current, high speed and the good feature of low saturation pressure degradation, is widely used in powerful device, in modern power electronics technology, plays the role of a nucleus.The height of IGBT electric pressure, the size of current capacity, also there are differences the specification requirement of driver.High-power IGBT is generally used for high power occasion, and running environment is more complicated, so high-power IGBT is had relatively high expectations to drive circuit.Engineering is applied situation about feeding back and is shown, the fault spoilage of large capacity IGBT device is more much higher than the IGBT device of little electric current.
Generally, high-power IGBT driver will be opened the stage at first at IGBT, provides enough gate drive current to reduce the speed of opening of turn-on consumption and assurance IGBT, and meets driving power simultaneously, guarantees that IGBT stably turns on and off; Next requires drive circuit internal signal transmission as far as possible little without time delay or time delay, and when output is short-circuited, drive circuit can turn-off IGBT fast and effectively; Finally, IGBT drives as the bridge that is connected between control circuit and power circuit, must have good electrical isolation function, guarantees that control circuit is not subject to the interference of main circuit and affects.Meet under the prerequisite of above-mentioned functions, IGBT drives and also should consider Installation Flexibility, simple and practical and low-cost etc.
The driving of high-power IGBT is at present generally to adopt special chip; add that external drive level or resolution element realize; also there is at present integrated special-purpose driving; inside is integrated with overcurrent under-voltage protection and soft turn-off function; and all kinds of running parameters outside is adjustable, but complex structure is expensive; cost is higher, and versatility is not strong.
The high-power IGBT driver of designed, designed generally adopts optocoupler or optical fiber isolation and transformer isolation mode.Adopt optocoupler or optical fiber isolation drive mode, solved voltage isolation, anti-electromagnetic interference problem.But the operation principle of optocoupler and optical fiber has determined that it belongs to active isolation, must there is insulating power supply in isolation output, conventionally also will be amplified and wait processing, and transmission has delay, circuit form complexity.And the control of these hot ends and process chip are light current device, when IGBT short circuit or current break, be easily interfered, reduced the reliability of IGBT work.
Adopt transformer isolation mode to comprise passive way, active method and self-supporting power method.Passive way is to utilize the output of transformer secondary output directly to drive IGBT, this method is simple, do not need independent driving power, but the instantaneous drive current needing due to high-power IGBT is large, it is high that driving power is wanted, the primary input signal of requirement transformer adopts the large-signal of certain power, requires the volume of transformer larger; In active method, transformer only provides isolation signals, at transformer secondary output, separately has shaping amplification circuit, and this method drive waveforms is better, but the accessory power supply of isolation need to be provided in addition, may introduce parasitic interference; In self-supporting power method, transformer, for transmitting driving-energy, transmits logical signal for high frequency modulated demodulation techniques again.When isolation voltage is higher, three kinds of methods are all given in transformer manufacture craft and structure and are brought many difficulties.
Summary of the invention
For above problem the invention provides a kind of simple and practical, volume is little, flexible for installation, reliability is high, facilitate adjusting, processing ease and high-power IGBT driver cheaply.
In order overcoming the above problems, to the invention provides a kind of high-power IGBT driver, to it is characterized in that: comprise a pulse power circuit, n instrument transformer T1 to Tn, wherein n >=2, and clamp and current-limiting circuit; Described clamp and current-limiting circuit comprise voltage-stabiliser tube V1 and voltage-stabiliser tube V2, and resistance R 1 and resistance R 2;
Single line cable is through the center of all n instrument transformer, as the armature winding of all n instrument transformer;
Each instrument transformer has independent secondary winding, and the direction of winding of all secondary winding is consistent, and the number of turn is identical, and the secondary winding of all n instrument transformer is all in parallel; 1 end of each instrument transformer secondary winding and 1 end of other n-1 instrument transformer secondary winding link together, and 2 ends of each instrument transformer secondary winding and 2 ends of other n-1 instrument transformer secondary winding link together;
The negative terminal of voltage-stabiliser tube V1 is connected with 1 end of secondary winding, and the negative terminal of voltage-stabiliser tube V2 is connected with 2 ends of secondary winding, and the anode of voltage-stabiliser tube V1 and the anode of voltage-stabiliser tube V2 link together simultaneously;
One end of resistance R 1 is connected to 1 end of secondary winding, and the other end is connected to 2 ends of secondary winding; One end of resistance R 2 is connected to 1 end of secondary winding, and 2 ends of the other end and secondary winding are respectively as driver output end;
Described pulse power circuit, for amplifying triggering signal, produces pulsed power signal, and delivers to the armature winding of instrument transformer;
Described instrument transformer, for transmission pulse power signal, and isolates current potential;
Described clamp and current-limiting circuit, for being limited in safe range by driving voltage and drive current.
The pulsed power signal of pulse power circuit output meets: the frequency of pulsed power signal is identical with the frequency of triggering signal, the anode pulse duration of pulsed power signal is identical with the pulse duration of triggering signal, and the width of pulsed power signal anode pulse and the product of amplitude equate with the product of negative terminal pulse duration and amplitude.
The positive negative pulse stuffing Waveform Input of pulse power circuit output, to armature winding, through n instrument transformer coupling output, produces positive negative pulse stuffing waveform, after clamp and current-limiting circuit, for the driving of IGBT on the secondary winding in parallel of all n instrument transformer.
Compared with prior art, its remarkable advantage is in the present invention: (1) circuit topology is simple, and components and parts are few, and volume is little, lightweight, is applicable to multiple fields and uses; (2) pulsed power signal of pulse power circuit output, drive current is large, can drive high-power IGBT device, and adopts power signal transmissions, has effectively suppressed interference signal, has improved the reliability of drive circuit; (3) secondary winding of instrument transformer output in parallel, can provide larger instantaneous output current, and carrying load ability is strong, and has reduced distributed constant, takes into account wide, burst pulse, has accelerated the speed that turns on and off of IGBT, and has reduced the loss that turns on and off of IGBT; (4) by instrument transformer, realize the isolation of drive circuit and main circuit, greatly strengthened the reliability of drive circuit, and the damage to drive circuit while effectively having prevented that main circuit from breaking down; (5) in secondary winding loop, be passive device, need not accessory power supply, circuit is simple, has reduced equipment amount, has reduced circuit complexity, has stopped parasitic disturbances; (6) instrument transformer form can very simple method realize relatively high isolation voltage, has expanded the use field of driver; (7) armature winding of instrument transformer is input as positive negative pulse stuffing, the magnetic bias that is conducive to instrument transformer, can increase the pulse duration of driver output, and the reverse impulse of driver is conducive to the quick shutoff of IGBT, reduce the turn-off power loss of IGBT, be conducive to the protection of IGBT; (7) instrument transformer reliability is high, and transmission delay is little, can realize higher switching frequency, does not have problem of aging; (8) manufacture and design easily, debugging is convenient, and cost is very low.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of driver of the present invention;
Fig. 2 is the schematic diagram of driver of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Fig. 1 to 2, the invention provides a kind of high-power IGBT driver, comprise a pulse power circuit, n instrument transformer T1 to Tn, wherein n >=2, and clamp and current-limiting circuit; Described clamp and current-limiting circuit comprise voltage-stabiliser tube V1 and voltage-stabiliser tube V2, and resistance R 1 and resistance R 2;
Single line cable is through the center of all n instrument transformer, as the armature winding of all n instrument transformer;
Each instrument transformer has independent secondary winding, and the direction of winding of all secondary winding is consistent, and the number of turn is identical, and the secondary winding of all n instrument transformer is all in parallel; 1 end of each instrument transformer secondary winding and 1 end of other n-1 instrument transformer secondary winding link together, and 2 ends of each instrument transformer secondary winding and 2 ends of other n-1 instrument transformer secondary winding link together;
The negative terminal of voltage-stabiliser tube V1 is connected with 1 end of secondary winding, and the negative terminal of voltage-stabiliser tube V2 is connected with 2 ends of secondary winding, and the anode of voltage-stabiliser tube V1 and the anode of voltage-stabiliser tube V2 link together simultaneously;
One end of resistance R 1 is connected to 1 end of secondary winding, and the other end is connected to 2 ends of secondary winding; One end of resistance R 2 is connected to 1 end of secondary winding, and 2 ends of the other end and secondary winding are respectively as driver output end.
Described pulse power circuit, for amplifying triggering signal, produces pulsed power signal, and delivers to the armature winding of instrument transformer;
Described instrument transformer, for transmission pulse power signal, and isolates current potential;
Described clamp and current-limiting circuit, for being limited in safe range by driving voltage and drive current.
The pulsed power signal of pulse power circuit output meets: the frequency of pulsed power signal is identical with the frequency of triggering signal, the anode pulse duration of pulsed power signal is identical with the pulse duration of triggering signal, and the width of pulsed power signal anode pulse and the product of amplitude equate with the product of negative terminal pulse duration and amplitude.
Voltage-stabiliser tube V1 and V2 are clamped at safe range by the output voltage of driver, and R1 is that thousands of ohm arrives the resistance of tens of kilohms, the resistance that R2 is several ohm to tens of ohm.
The operation principle of driver: when pulse power circuit is received triggering signal, if enable as enable state, pulse power circuit is exported positive and negative output pulses waveform, the frequency of impulse waveform is identical with the frequency of triggering signal, pulse anode width is identical with triggering signal width, and the width of negative-going pulse and the product of amplitude equal the width of direct impulse and the product of amplitude substantially.Armature winding is received after the positive negative pulse stuffing waveform of pulse power circuit output, through instrument transformer, be coupled, at the secondary winding of all n instrument transformer, produce the positive negative pulse stuffing waveform of same frequency and pulse duration, through voltage-stabiliser tube V1 and V2, and clamp and the current-limiting circuit of resistance R 1 and resistance R 2 compositions, for IGBT provides drive waveforms.When IGBT is short-circuited, by turn-offing the enable signal of pulse power circuit, the output that can turn-off fast driver drives.The isolation of pulse power circuit and IGBT major loop can be adopted in two ways, and a kind of method is that armature winding adopts high pressure resistant insulation line; Or adopt high pressure resistant insulation material to make hollow sheath, through instrument transformer center, the cable of armature winding passes from hollow sheath.
The foregoing is only the preferred embodiments of the present invention, be not restricted to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in claim scope of the present invention.
Claims (2)
1. a high-power IGBT driver, is characterized in that: comprise a pulse power circuit, n instrument transformer T1 to Tn, wherein n >=2, and clamp and current-limiting circuit; Described clamp and current-limiting circuit comprise voltage-stabiliser tube V1 and voltage-stabiliser tube V2, and resistance R 1 and resistance R 2;
Single line cable is through the center of all n instrument transformer, as the armature winding of all n instrument transformer;
Each instrument transformer has independent secondary winding, and the direction of winding of all secondary winding is consistent, and the number of turn is identical, and the secondary winding of all n instrument transformer is all in parallel; 1 end of each instrument transformer secondary winding and 1 end of other n-1 instrument transformer secondary winding link together, and 2 ends of each instrument transformer secondary winding and 2 ends of other n-1 instrument transformer secondary winding link together;
The negative terminal of voltage-stabiliser tube V1 is connected with 1 end of secondary winding, and the negative terminal of voltage-stabiliser tube V2 is connected with 2 ends of secondary winding, and the anode of voltage-stabiliser tube V1 and the anode of voltage-stabiliser tube V2 link together simultaneously;
One end of resistance R 1 is connected to 1 end of secondary winding, and the other end is connected to 2 ends of secondary winding; One end of resistance R 2 is connected to 1 end of secondary winding, and 2 ends of the other end and secondary winding are respectively as driver output end;
Described pulse power circuit, for amplifying triggering signal, produces pulsed power signal, and delivers to the armature winding of instrument transformer;
Described instrument transformer, for transmission pulse power signal, and isolates current potential;
Described clamp and current-limiting circuit, for being limited in safe range by driving voltage and drive current.
2. high-power IGBT driver according to claim 1, it is characterized in that, the pulsed power signal of pulse power circuit output meets: the frequency of pulsed power signal is identical with the frequency of triggering signal, the anode pulse duration of pulsed power signal is identical with the pulse duration of triggering signal, and the width of pulsed power signal anode pulse and the product of amplitude equate with the product of negative terminal pulse duration and amplitude.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410491443.5A CN104202027A (en) | 2014-09-23 | 2014-09-23 | High-power IGBT (insulated gate bipolar transistor) driver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410491443.5A CN104202027A (en) | 2014-09-23 | 2014-09-23 | High-power IGBT (insulated gate bipolar transistor) driver |
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| CN104202027A true CN104202027A (en) | 2014-12-10 |
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| CN201410491443.5A Pending CN104202027A (en) | 2014-09-23 | 2014-09-23 | High-power IGBT (insulated gate bipolar transistor) driver |
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| US20080106155A1 (en) * | 2004-10-01 | 2008-05-08 | Kabushiki Kaisha Yaskawa Denki | Linear Motor System |
| CN102355123A (en) * | 2011-09-27 | 2012-02-15 | 常熟英纳能源科技有限公司 | IGBT (Insulated Gate Bipolar Translator) driving circuit for novel high-frequency high-voltage switching power supply |
| EP2424089A2 (en) * | 2010-08-31 | 2012-02-29 | Hitachi Automotive Systems, Ltd. | Power supply circuit and power conversion device |
| CN103391078A (en) * | 2013-07-19 | 2013-11-13 | 中国电子科技集团公司第十四研究所 | Small and efficient high-power solid-state modulator |
| CN103414354A (en) * | 2013-07-16 | 2013-11-27 | 燕山大学 | Power switch device pulse transformer isolation driving circuit |
| CN204046559U (en) * | 2014-09-23 | 2014-12-24 | 中国电子科技集团公司第十四研究所 | High-power IGBT driver |
-
2014
- 2014-09-23 CN CN201410491443.5A patent/CN104202027A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080106155A1 (en) * | 2004-10-01 | 2008-05-08 | Kabushiki Kaisha Yaskawa Denki | Linear Motor System |
| EP2424089A2 (en) * | 2010-08-31 | 2012-02-29 | Hitachi Automotive Systems, Ltd. | Power supply circuit and power conversion device |
| CN102355123A (en) * | 2011-09-27 | 2012-02-15 | 常熟英纳能源科技有限公司 | IGBT (Insulated Gate Bipolar Translator) driving circuit for novel high-frequency high-voltage switching power supply |
| CN103414354A (en) * | 2013-07-16 | 2013-11-27 | 燕山大学 | Power switch device pulse transformer isolation driving circuit |
| CN103391078A (en) * | 2013-07-19 | 2013-11-13 | 中国电子科技集团公司第十四研究所 | Small and efficient high-power solid-state modulator |
| CN204046559U (en) * | 2014-09-23 | 2014-12-24 | 中国电子科技集团公司第十四研究所 | High-power IGBT driver |
Non-Patent Citations (2)
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| FRANK D.PETRUZELLA: "《电工技术：从电工操作到电路分析》", 31 January 2008, 科学出版社 * |
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