CN204046559U - High-power IGBT driver - Google Patents
High-power IGBT driver Download PDFInfo
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- CN204046559U CN204046559U CN201420550055.5U CN201420550055U CN204046559U CN 204046559 U CN204046559 U CN 204046559U CN 201420550055 U CN201420550055 U CN 201420550055U CN 204046559 U CN204046559 U CN 204046559U
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Abstract
The utility model relates to a kind of high-power IGBT driver, and one root cable passes 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; The secondary winding Parallel opertation of instrument transformer, can provide larger instantaneous output current, and carrying load ability is strong, and reduces distributed constant, and take into account wide, burst pulse, what accelerate IGBT turns on and off speed, and what decrease IGBT turns on and off loss; Realized the isolation of drive circuit and main circuit by instrument transformer, greatly strengthen the reliability of drive circuit, and effectively prevent the damage to drive circuit when main circuit breaks down; Passive device is in secondary winding loop, need not accessory power supply, circuit is simple, decreases equipment amount, reduces circuit complexity, stopped parasitic disturbances.
Description
Technical field
The utility model relates to a kind of driver, particularly relates to a kind of high-power IGBT driver.
Background technology
Insulated gate bipolar transistor (IGBT) has high withstand voltage, big current, high speed and the good feature of low saturation pressure degradation, is widely used in powerful device, plays the role of a nucleus in modern power electronics technology.The height of IGBT electric pressure, the size of current capacity, also there are differences the technical requirement of driver.High-power IGBT is generally used for high power occasion, and running environment is more complicated, so high-power IGBT requires higher to drive circuit.The situation of engineer applied feedback shows, the fault spoilage of Large Copacity IGBT device is more much higher than the IGBT device of small area analysis.
Under normal circumstances, high-power IGBT driver will open the stage at first at IGBT, provides enough gate drive current to reduce turn-on consumption and to ensure that IGBT's opens speed, meets driving power simultaneously, guarantee that IGBT stably turns on and off; Next require drive circuit internal signal transmission without time delay or time delay as far as possible little, and when output is short-circuited, drive circuit can turn off IGBT fast and effectively; Finally, IGBT drives as the connection bridge between control circuit and power circuit, must have good electrical isolation function, ensures that control circuit is not subject to the interference of main circuit and affects.Under meeting the prerequisite of above-mentioned functions, IGBT drives and also should consider Installation Flexibility, simple and practical and low cost etc.
The driving of current high-power IGBT is generally adopt special chip; add that external drive level or resolution element realize; there has also been integrated special driving at present; inside is integrated with overcurrent under-voltage protection and soft turn-off function; and all kinds of running parameter outside is adjustable, but complex structure, expensive; cost is higher, and versatility is not strong.
The high-power IGBT driver of designed, designed generally adopts optocoupler or Fiber isolation and transformer isolation mode.Adopt optocoupler or Fiber isolation type of drive, solve voltage isolation, electromagnetism interference problem.But the operation principle of optocoupler and optical fiber determines it belongs to active isolation, and isolation and amplifier end must exist insulating power supply, the process such as usually also will to be amplified, transmission has delay, and circuit form is complicated.And the control of these hot ends and process chip are light current device, be easily interfered when IGBT short circuit or current break, reduce the reliability of IGBT work.
Transformer isolation mode is adopted to comprise passive way, active approach and self-supporting power method.Passive way is the output Direct driver IGBT utilizing transformer secondary output, this method is simple, do not need independent driving power, but the instant drive current needed due to high-power IGBT is large, driving power wants high, require that the primary input signal of transformer adopts the large-signal of certain power, require that the volume of transformer is larger; In active approach, transformer only provides isolation signals, separately has shaping amplification circuit at transformer secondary output, and this method drive waveforms is better, but needs the accessory power supply providing isolation in addition, may introduce parasitic interference; In self-supporting power method, transformer, namely 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.
Utility model content
For above problem the utility model provide a kind of simple and practical, volume is little, flexible for installation, reliability is high, convenient regulate, the high-power IGBT driver of processing ease and low cost.
Providing a kind of high-power IGBT driver to overcome the above problems the utility model, 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 R1 and resistance R2;
Single line cable passes 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 transformer secondary winding and 1 end of other n-1 transformer secondary winding link together, and 2 ends of each transformer secondary winding and 2 ends of other n-1 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 R1 is connected to 1 end of secondary winding, and the other end is connected to 2 ends of secondary winding; One end of resistance R2 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, producing pulsed power signal, and delivering 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 that pulse power circuit exports 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 is equal with the product of negative terminal pulse duration and amplitude with the product of amplitude.
The positive negative pulse stuffing Waveform Input that pulse power circuit exports, to armature winding, through n instrument transformer coupling output, the secondary winding in parallel of all n instrument transformer produces positive negative pulse stuffing waveform, after clamp and current-limiting circuit, for the driving of IGBT.
Compared with prior art, its remarkable advantage is the utility model: (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 adopt power signal transmissions, restrained effectively interference signal, improve the reliability of drive circuit; (3) the secondary winding Parallel opertation of instrument transformer, can provide larger instantaneous output current, and carrying load ability is strong, and reduces distributed constant, and take into account wide, burst pulse, what accelerate IGBT turns on and off speed, and what decrease IGBT turns on and off loss; (4) realized the isolation of drive circuit and main circuit by instrument transformer, greatly strengthen the reliability of drive circuit, and effectively prevent the damage to drive circuit when main circuit breaks down; (5) passive device is in secondary winding loop, need not accessory power supply, circuit is simple, decreases equipment amount, reduces circuit complexity, stopped parasitic disturbances; (6) instrument transformer form can realize relatively high isolation voltage in a very simple way, expands the use field of driver; (7) armature winding of instrument transformer is input as positive negative pulse stuffing, be conducive to the magnetic bias of instrument transformer, the pulse duration that driver exports can be increased, and the reverse impulse of driver be 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, there is not 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 the utility model driver;
Fig. 2 is the schematic diagram of the utility model driver.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Fig. 1 to 2, the utility model provides a kind of high-power IGBT driver, comprises 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 R1 and resistance R2;
Single line cable passes 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 transformer secondary winding and 1 end of other n-1 transformer secondary winding link together, and 2 ends of each transformer secondary winding and 2 ends of other n-1 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 R1 is connected to 1 end of secondary winding, and the other end is connected to 2 ends of secondary winding; One end of resistance R2 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, producing pulsed power signal, and delivering 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 that pulse power circuit exports 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 is equal with the product of negative terminal pulse duration and amplitude with the product of amplitude.
The output voltage of driver is clamped at safe range by voltage-stabiliser tube V1 and V2, and R1 is the resistance that several thousand ohms arrives tens of kilohms, and R2 is the several ohm of resistance to tens of Ohms.
The operation principle of driver: when pulse power circuit receives triggering signal, be enable state if enable, then pulse power circuit exports 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.After armature winding receives the positive negative pulse stuffing waveform of pulse power circuit output, be coupled through instrument transformer, the positive negative pulse stuffing waveform of same frequency and pulse duration is produced at the secondary winding of all n instrument transformer, through voltage-stabiliser tube V1 and V2, and the clamp that forms of resistance R1 and resistance R2 and current-limiting circuit, for IGBT provides drive waveforms.When IGBT is short-circuited, by turning off the enable signal of pulse power circuit, the output that can turn off driver fast 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 be made hollow sheath, through instrument transformer center, the cable of armature winding passes from hollow sheath.
The foregoing is only preferred embodiment of the present utility model, be not restricted to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within right of the present utility model.
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 R1 and resistance R2;
Single line cable passes 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 transformer secondary winding and 1 end of other n-1 transformer secondary winding link together, and 2 ends of each transformer secondary winding and 2 ends of other n-1 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 R1 is connected to 1 end of secondary winding, and the other end is connected to 2 ends of secondary winding; One end of resistance R2 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, producing pulsed power signal, and delivering 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 that pulse power circuit exports 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 is equal with the product of negative terminal pulse duration and amplitude with the product of amplitude.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420550055.5U CN204046559U (en) | 2014-09-23 | 2014-09-23 | High-power IGBT driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420550055.5U CN204046559U (en) | 2014-09-23 | 2014-09-23 | High-power IGBT driver |
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| CN204046559U true CN204046559U (en) | 2014-12-24 |
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| CN201420550055.5U Active CN204046559U (en) | 2014-09-23 | 2014-09-23 | High-power IGBT driver |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104202027A (en) * | 2014-09-23 | 2014-12-10 | 中国电子科技集团公司第十四研究所 | High-power IGBT (insulated gate bipolar transistor) driver |
| CN114337350A (en) * | 2021-12-28 | 2022-04-12 | 上海联影医疗科技股份有限公司 | Driving device and medical equipment |
-
2014
- 2014-09-23 CN CN201420550055.5U patent/CN204046559U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104202027A (en) * | 2014-09-23 | 2014-12-10 | 中国电子科技集团公司第十四研究所 | High-power IGBT (insulated gate bipolar transistor) driver |
| CN114337350A (en) * | 2021-12-28 | 2022-04-12 | 上海联影医疗科技股份有限公司 | Driving device and medical equipment |
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