CN112803724A - Positive-pressure turn-on and negative-pressure turn-off IGBT (insulated Gate Bipolar transistor) driving circuit - Google Patents
Positive-pressure turn-on and negative-pressure turn-off IGBT (insulated Gate Bipolar transistor) driving circuit Download PDFInfo
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- CN112803724A CN112803724A CN202110012609.0A CN202110012609A CN112803724A CN 112803724 A CN112803724 A CN 112803724A CN 202110012609 A CN202110012609 A CN 202110012609A CN 112803724 A CN112803724 A CN 112803724A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/337—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
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Abstract
The invention discloses an IGBT driving circuit switched off by positive pressure and negative pressure, which comprises a power circuit and a driving circuit; the power supply circuit comprises a square wave generating circuit for generating square wave signals to drive the push-pull conversion circuit, the push-pull conversion circuit for being alternately switched on according to the square wave signals and realizing energy conversion by switching off the push-pull switching tube, a transformer for transmitting energy from the push-pull conversion circuit to the rectifying and filtering circuit and a rectifying and filtering circuit for rectifying and filtering the energy transmitted by the transformer to generate a positive and negative stable power supply, and a control panel power supply provides power for the power supply circuit; and the driving circuit is used for selecting the positive and negative stable power supply generated by the rectifying and filtering circuit according to the PWM signal so as to provide a driving signal for controlling the IGBT. The IGBT power supply circuit does not need to additionally install an isolation power supply, is simple in structure, reliable in performance, low in cost and strong in compatibility, realizes positive-pressure switching-on and negative-pressure switching-off of the IGBT, and has practical significance.
Description
Technical Field
The invention belongs to the technical field of IGBT and relates to an IGBT driving circuit capable of being switched on and switched off by positive pressure and negative pressure.
Background
An Insulated Gate Bipolar Transistor (IGBT) is a composite fully-controlled voltage-driven power semiconductor device consisting of a Bipolar Junction Transistor (BJT) and an insulated Gate field effect transistor (MOS), and has the advantages of high input impedance of the MOSFET and low conduction voltage drop of the GTR. The GTR saturation voltage is reduced, the current carrying density is high, but the driving current is large; the MOSFET has small driving power, high switching speed, large conduction voltage drop and small current carrying density. The IGBT integrates the advantages of the two devices, has small driving power and reduced saturation voltage, and is very suitable for being applied to the fields of converter systems with direct-current voltage of 600V or more, such as alternating-current motors, frequency converters, switching power supplies, lighting circuits, traction transmission and the like.
For the IGBT applied to medium and high power conversion systems, the driving circuit is used as a connecting channel of the control circuit and the power circuit, plays a key role in the operation of the IGBT, and a good driving circuit can enable the whole circuit to be stable and reliable. The IGBT driving circuit is used for converting and amplifying a control signal from the main control board into a driving signal with enough power through isolation so as to ensure the on-off of the IGBT. In order to rapidly and reliably turn on and off, the IGBT is usually turned on by a positive voltage, and the IGBT is turned off by a negative voltage (the IGBT is turned off by a negative voltage, so that the turn-off speed can be increased, the anti-interference capability can be enhanced, and false triggering can be prevented), but the conventional IGBT driving circuit generally adopts the following three approaches for realizing the above functions: 1. the driving circuit is optimally designed, but the defects of complexity, low function utilization rate and easy interference and false triggering exist; 2. the existing driving module is not required to be optimized, one path of isolation power supply module is directly added, but the isolation power supply module does not have the function of negative pressure turn-off, and the switching rate of the IGBT is greatly influenced, so that the switching loss is increased, and the stability is influenced; 3. the existing driving module is not required to be optimized, and two paths of positive and negative power supply modules are directly used for providing positive and negative pressure, but the product design is limited by well-shaped specification parameters such as output power and voltage and current of the power supply module, and the design cost is greatly increased.
Therefore, the IGBT driving circuit which has the advantages of simple circuit structure, reliable performance, low cost, strong compatibility, no need of an external driving module and an independent isolation power supply and can realize positive-voltage on-negative-voltage off-state is very significant.
Disclosure of Invention
The invention aims to overcome the defects of complex structure, poor performance reliability, high cost, poor compatibility and incapability of realizing positive-pressure on and negative-pressure off of an IGBT driving circuit in the prior art, and provides the IGBT driving circuit which has the advantages of simple circuit structure, reliable performance, low cost, strong compatibility, no need of an external driving module and an independent isolation power supply and capability of realizing positive-pressure on and negative-pressure off.
In order to achieve the purpose, the invention provides the following technical scheme:
an IGBT drive circuit switched on and off by positive pressure and negative pressure comprises a power circuit and a drive circuit;
the power circuit comprises a square wave generating circuit, a push-pull conversion circuit, a transformer and a rectification filter circuit, and the control panel power supply provides power for the power circuit;
the square wave generating circuit is used for generating square wave signals to drive the push-pull conversion circuit;
the push-pull conversion circuit is used for being alternately switched on according to the square wave signal and further realizing energy conversion by switching off the push-pull switching tube;
the transformer is used for transmitting energy from the push-pull conversion circuit to the rectification filter circuit and realizing signal isolation;
the rectification filter circuit is used for rectifying and filtering the energy transmitted by the transformer to generate a positive and negative stable power supply;
and the driving circuit is used for selecting the positive and negative stable power supply generated by the rectifying and filtering circuit according to the PWM signal so as to provide a driving signal for controlling the IGBT.
The IGBT driving circuit capable of being switched on and switched off at positive pressure has reasonable circuit design, is powered by the power supply of the control board without additionally arranging an isolation power supply, has simple integral structure, reliable performance, low cost and strong compatibility, can provide stable positive pressure and negative pressure, further realizes the switching on and switching off at positive pressure of the IGBT and has great practical significance.
As a preferred technical scheme:
the positive-voltage-on negative-voltage-off IGBT driving circuit comprises an oscillator, wherein the oscillator comprises an oscillator IC, a VREF pin of the oscillator IC is sequentially connected with a timing resistor R3 and a timing capacitor C4, an OUT pin of the oscillator IC is connected with a push-pull conversion circuit, and an RT/CT pin of the oscillator IC is connected with a timing capacitor C4.
The positive-voltage-on negative-voltage-off IGBT driving circuit comprises a switching tube Q1, a switching tube Q2 and a capacitor C7;
the control ends of the switching tube Q1 and the switching tube Q2 are connected with an OUT pin of the oscillator IC;
the input end of the switching tube Q1 is connected with the live wire of the control panel power supply, the output end of the switching tube Q1 is connected with the input end of the switching tube Q2, the output end of the switching tube Q2 is connected with the ground wire of the control panel power supply, and a coil of the transformer is connected with the capacitor C7 in series and then connected with the switching tube Q2 in parallel.
The positive-voltage-on negative-voltage-off IGBT drive circuit comprises another coil of the transformer and a plurality of capacitors connected with the other coil;
and the other coil of the transformer and a plurality of capacitors connected with the other coil form an LC filter circuit.
The positive-voltage-on negative-voltage-off IGBT driving circuit comprises an isolation driving optocoupler, a switching tube Q3 and a switching tube Q4;
one end of the isolation driving optocoupler is connected with a PWM signal, the other end of the isolation driving optocoupler is connected with a switch tube Q3 and a switch tube Q4, the isolation driving optocoupler is connected with an IGBT driving signal output G end through a switch tube Q3 and a switch tube Q4, stable positive and negative voltages are provided for the IGBT driving signal output G end through a control switch tube Q3 and a switch tube Q4, and then positive-voltage switching-on and negative-voltage switching-off of the IGBT are achieved. The scope of the present invention is not limited to this, and only one possible technical solution is given here, and the present invention only partially describes the specific IGBT driving circuit.
Has the advantages that:
(1) the positive-pressure-opening negative-pressure-closing IGBT driving circuit is reasonable in circuit design, the control panel power supply provides power supply, an isolation power supply does not need to be additionally arranged, the whole structure is simple, the performance is reliable, stable positive pressure and negative pressure can be provided, and positive-pressure-opening negative-pressure closing of the IGBT is further realized;
(2) compared with the traditional IGBT driving circuit, the positive-pressure-on negative-pressure-off IGBT driving circuit provided by the invention can realize positive-pressure-on negative-pressure-off of the IGBT by only adding the oscillator chip, the resistance-capacitance, the switching tube and the transformer, and has the advantages of extremely low cost, low reconstruction cost and difficulty, strong compatibility and great practical significance.
Drawings
Fig. 1 is a circuit schematic diagram of the positive-voltage-on negative-voltage-off IGBT driving circuit according to the present invention.
Detailed Description
The present invention will be described in more detail with reference to the accompanying drawings, in which embodiments of the invention are shown and described, and it is to be understood that the embodiments described are merely illustrative of some, but not all embodiments of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1
As shown in fig. 1, PWM is a control signal of a control board, VCC, GND and a power system of the control board are the same power system, specifically, a power live wire and a power ground wire, respectively, and G, S is an IGBT drive signal for driving an IGBT module;
the IGBT driving circuit for positive-pressure switching-on and negative-pressure switching-off comprises a power supply circuit and a driving circuit;
the power circuit comprises a square wave generating circuit, a push-pull conversion circuit, a transformer and a rectification filter circuit, and the control panel power supply provides power for the power circuit;
the square wave generating circuit is used for generating square wave signals to drive the push-pull conversion circuit and comprises an oscillator, the oscillator comprises an oscillator IC, a VREF pin of the oscillator IC is sequentially connected with a timing resistor R3 and a timing capacitor C4, an OUT pin of the oscillator IC is connected with the push-pull conversion circuit, and an RT/CT pin of the oscillator IC is connected with a timing capacitor C4;
the push-pull conversion circuit is used for being alternately switched on according to square wave signals and further realizing energy conversion by switching off a push-pull switching tube, and comprises a switching tube Q1, a switching tube Q2 and a capacitor C7, wherein the control ends of a switching tube Q1 and a switching tube Q2 are connected with an OUT pin of an oscillator IC, the input end of a switching tube Q1 is connected with a live wire of a control panel power supply, the output end of the switching tube Q2 is connected with the input end of a switching tube Q2, the output end of a switching tube Q2 is connected with a ground wire of the control panel power supply, and a coil of a transformer is connected with the capacitor C7 in series and then connected;
the transformer is used for transferring energy from the push-pull conversion circuit to the rectifying and filtering circuit;
the rectification filter circuit is used for rectifying and filtering the energy transmitted by the transformer to generate a positive and negative stable power supply and comprises another coil of the transformer and a plurality of capacitors connected with the other coil, and the other coil of the transformer and the plurality of capacitors connected with the other coil form an LC filter circuit;
drive circuit for positive negative stable power that produces the rectification filter circuit according to the PWM signal selects and then provides the drive signal of control IGBT, including keeping apart the drive opto-coupler, switch tube Q3 and switch tube Q4, keep apart drive opto-coupler one end and PWM signal connection, the other end is connected with switch tube Q3 and switch tube Q4, and be connected with IGBT drive signal output G end through switch tube Q3 and switch tube Q4, provide stable positive and negative voltage for IGBT drive signal output G end through control switch tube Q3 and switch tube Q4, and then realize that the malleation of IGBT switches on the negative voltage and turn-off.
The specific operation process of the positive-voltage switching-on and negative-voltage switching-off IGBT drive circuit is as follows:
the square wave generating circuit comprises: an oscillation IC U1(UC2845) is adopted to generate a push-pull driving signal, a pin 6(OUT) of a U1 is a pulse output port, the working frequency of an oscillator in the U1 is determined by an external resistor-capacitor R3C 4, after the oscillator is powered on, VREF charges C4 through a resistor R3 to enable the voltage of a pin 4(RT/CT) to rise, when the voltage rises to 2.8V, the voltage on a timing capacitor C4 is discharged in the oscillator, when the voltage drops to 1.4V, the C4 is charged, therefore, a sawtooth wave oscillator is formed, and after conversion processing, a square wave with the frequency half of the internal oscillation frequency is finally output at the pin 6 (OUT);
push-pull conversion circuit, high-frequency transformer: the square wave signal generated by the oscillator IC controls the switching tubes Q1 and Q2, when the square wave is at high level, Q1 is switched on, VCC passes through R1, the primary coil of the transformer charges the capacitor C7, the current of the primary coil of the transformer is from top to bottom, when the square wave is at low level, Q1 is switched off, Q2 is switched on, the capacitor C7 passes through the primary coil of the transformer, R6 discharges, and the current of the transformer coil is from bottom to top, thus alternating current is generated on the transformer so as to transfer energy to the secondary coil;
the rectification filter circuit: when the secondary coil of the T1 is positive and negative, current flows from the upper end of the secondary coil of the T1 to the lower end of the secondary coil of the T1 through D1, C8 and C11, and when the lower end of the secondary coil of the T1 is positive, the current charges C1 through D1, so that C1 and D1 form a voltage-doubling rectifying circuit, the secondary coil L of the transformer, C8, C9, C11 and C12 form an LC filter circuit, so that + V is integrated into a direct-current voltage relative to-V, and the S point clamp of a voltage regulator D5 is positioned at + V minus an intermediate voltage of the regulated voltage, wherein the intermediate voltage is between + V and-V;
a drive circuit: d4 is the mistake that prevents to disturb and arouses and switches on, and when PWM was the high level, the opto-coupler switched on, and the upper tube of opto-coupler isolation end is opened for Q3 switches on, + V passes through Q3 and links to each other with the G end, makes to form a positive voltage between the GS. When the PWM is in a low level, a lower tube of the optical coupler isolation end is conducted, so that Q3 is turned off, Q4 is conducted, and-V is connected with a G end through Q4, and a negative voltage is formed between GS.
The positive-pressure-on negative-pressure-off IGBT driving circuit is reasonable in circuit design, a control panel power supply is used for providing a power supply, an isolation power supply does not need to be additionally arranged, the whole structure is simple, the performance is reliable, stable positive pressure and negative pressure can be provided, and positive-pressure-on negative-pressure-off of the IGBT is further realized; compared with the traditional IGBT driving circuit, positive-voltage switching-on and negative-voltage switching-off of the IGBT can be realized only by adding the oscillator chip, the resistance-capacitance, the switching tube and the transformer, the cost is extremely low, the modification cost and the difficulty are low, the compatibility is strong, and the IGBT driving circuit has practical significance.
Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these embodiments are merely illustrative and various changes or modifications may be made without departing from the principles and spirit of the invention.
Claims (5)
1. The IGBT driving circuit is characterized by comprising a power supply circuit and a driving circuit;
the power circuit comprises a square wave generating circuit, a push-pull conversion circuit, a transformer and a rectification filter circuit, and the control panel power supply provides power for the power circuit;
the square wave generating circuit is used for generating square wave signals to drive the push-pull conversion circuit;
the push-pull conversion circuit is used for being alternately switched on according to the square wave signal and further realizing energy conversion by switching off the push-pull switching tube;
the transformer is used for transferring energy from the push-pull conversion circuit to the rectifying and filtering circuit;
the rectification filter circuit is used for rectifying and filtering the energy transmitted by the transformer to generate a positive and negative stable power supply;
and the driving circuit is used for selecting the positive and negative stable power supply generated by the rectifying and filtering circuit according to the PWM signal so as to provide a driving signal for controlling the IGBT.
2. The positive-voltage-on negative-voltage-off IGBT driving circuit according to claim 1, wherein the square wave generating circuit comprises an oscillator, the oscillator comprises an oscillator IC, a VREF pin of the oscillator IC is sequentially connected with a timing resistor R3 and a timing capacitor C4, an OUT pin of the oscillator IC is connected with the push-pull conversion circuit, and an RT/CT pin of the oscillator IC is connected with a timing capacitor C4.
3. The positive-voltage-on negative-voltage-off IGBT driving circuit according to claim 2, wherein the push-pull conversion circuit comprises a switch tube Q1, a switch tube Q2 and a capacitor C7;
the control ends of the switching tube Q1 and the switching tube Q2 are connected with an OUT pin of the oscillator IC;
the input end of the switching tube Q1 is connected with the live wire of the control panel power supply, the output end of the switching tube Q1 is connected with the input end of the switching tube Q2, the output end of the switching tube Q2 is connected with the ground wire of the control panel power supply, and a coil of the transformer is connected with the capacitor C7 in series and then connected with the switching tube Q2 in parallel.
4. The IGBT driving circuit capable of being turned on and turned off under the positive pressure and the negative pressure according to claim 3, wherein the rectification filter circuit comprises another coil of the transformer and a plurality of capacitors connected with the other coil;
and the other coil of the transformer and a plurality of capacitors connected with the other coil form an LC filter circuit.
5. The IGBT driving circuit capable of being turned on and turned off under positive voltage and negative voltage according to claim 4, wherein the driving circuit comprises an isolation driving optocoupler, a switching tube Q3 and a switching tube Q4;
one end of the isolation driving optocoupler is connected with a PWM signal, the other end of the isolation driving optocoupler is connected with a switch tube Q3 and a switch tube Q4, the isolation driving optocoupler is connected with an IGBT driving signal output G end through a switch tube Q3 and a switch tube Q4, stable positive and negative voltages are provided for the IGBT driving signal output G end through a control switch tube Q3 and a switch tube Q4, and then positive-voltage switching-on and negative-voltage switching-off of the IGBT are achieved.
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| CN202110012609.0A CN112803724A (en) | 2021-01-06 | 2021-01-06 | Positive-pressure turn-on and negative-pressure turn-off IGBT (insulated Gate Bipolar transistor) driving circuit |
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| CN202110012609.0A CN112803724A (en) | 2021-01-06 | 2021-01-06 | Positive-pressure turn-on and negative-pressure turn-off IGBT (insulated Gate Bipolar transistor) driving circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113644812A (en) * | 2021-08-10 | 2021-11-12 | 海盐理想电子科技股份有限公司 | Single-power-supply IGBT negative-pressure driving circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101640526A (en) * | 2009-08-19 | 2010-02-03 | 广州金升阳科技有限公司 | IGBT driving circuit embedded with isolating source |
| CN204046407U (en) * | 2014-05-06 | 2014-12-24 | 西安西驰电能技术有限公司 | A kind of many level IGBT drive circuit |
| CN110896284A (en) * | 2019-11-21 | 2020-03-20 | 新乡航空工业(集团)有限公司 | Aviation high-voltage high-power three-phase full-control rectifying device based on silicon carbide |
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2021
- 2021-01-06 CN CN202110012609.0A patent/CN112803724A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101640526A (en) * | 2009-08-19 | 2010-02-03 | 广州金升阳科技有限公司 | IGBT driving circuit embedded with isolating source |
| CN204046407U (en) * | 2014-05-06 | 2014-12-24 | 西安西驰电能技术有限公司 | A kind of many level IGBT drive circuit |
| CN110896284A (en) * | 2019-11-21 | 2020-03-20 | 新乡航空工业(集团)有限公司 | Aviation high-voltage high-power three-phase full-control rectifying device based on silicon carbide |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113644812A (en) * | 2021-08-10 | 2021-11-12 | 海盐理想电子科技股份有限公司 | Single-power-supply IGBT negative-pressure driving circuit |
| CN113644812B (en) * | 2021-08-10 | 2024-02-27 | 海盐理想电子科技股份有限公司 | Single-power IGBT negative-pressure driving circuit |
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Application publication date: 20210514 |