CN111245412A - Switching device control circuit and control method thereof - Google Patents
Switching device control circuit and control method thereof Download PDFInfo
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- CN111245412A CN111245412A CN202010158523.4A CN202010158523A CN111245412A CN 111245412 A CN111245412 A CN 111245412A CN 202010158523 A CN202010158523 A CN 202010158523A CN 111245412 A CN111245412 A CN 111245412A
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- 239000000758 substrate Substances 0.000 claims 1
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- 230000001629 suppression Effects 0.000 abstract description 5
- 230000014759 maintenance of location Effects 0.000 abstract description 2
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- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
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Abstract
The invention discloses a switch device control circuit and a control method thereof, wherein the switch device control circuit comprises: the switch device and the main driving module drive the switch device through the resistance adjusting circuit; the resistance adjusting circuit comprises at least one adjusting resistor which is sequentially connected in series between the control end of the switching device and the main driving module, each adjusting resistor is provided with a control branch circuit which works independently in parallel, and the corresponding adjusting resistor is short-circuited when the control branch circuits are switched on. The invention reduces the change rate of the interference signal of the switch device from the source, the resistance adjusting circuit can be quickly and accurately switched to different resistance values, the resistance value switching process has no retention time, the resistance adjusting circuit synchronously changes along with the working state of the switch device, and the interference suppression effect is obviously improved.
Description
Technical Field
The invention relates to the technical field of switching device control circuits, in particular to a switching device control circuit with a variable driving resistor and a control method thereof.
Background
With the development of technology and science and technology, the power electronic frequency conversion technology is more and more concerned and emphasized, the requirements on the switching speed and the working efficiency of devices are continuously increased, and the application of high-power integrated circuits is more and more popularized. A switching power supply and a driving inverter circuit are largely used in a daily circuit, a large amount of incidental interference signals EMI (electromagnetic interference) are generated when a large-current MOS tube and an IGBT device are switched on and switched off, and the incidental interference signals EMI are easily coupled to other circuits through space parasitic capacitance and parasitic inductance to influence the normal work of other circuits. Furthermore, once the high frequency interference signal propagates through the space to the outside, it is difficult to completely eliminate the interference signal by a general method, and it is best to suppress the interference signal at the interference source.
The MOS tube and the IGBT are interference signal sources, and a gate electrode series resistance mode is generally adopted to reduce the current and voltage change rate of switching on and switching off. If the gate resistance is too large, the interference reduction may result in large device switching losses. The gate resistance is too small, although the switching loss of the device is reduced, the switching speed of the device is high, the current and voltage overshoot and oscillation are not obvious, and the interference suppression effect is not obvious.
Therefore, how to design a switching device control circuit capable of effectively suppressing an interference signal and a control method thereof are an urgent technical problem to be solved in the industry.
Disclosure of Invention
The invention provides a switching device control circuit with a variable driving resistor and a control method thereof, aiming at solving the defect that the existing switching device control circuit is poor in interference suppression effect.
The technical scheme adopted by the invention is that a switching device control circuit is designed, and the switching device control circuit comprises: the main driving module drives the switching device through the resistance adjusting circuit; the resistance adjusting circuit comprises at least one adjusting resistor which is sequentially connected in series between the control end of the switching device and the main driving module, each adjusting resistor is provided with a control branch circuit which works independently in parallel, and the corresponding adjusting resistor is short-circuited when the control branch circuits are switched on.
Preferably, the resistance adjustment circuit further comprises a fixed resistor in series with the adjustment resistor.
Preferably, the control branch is in a normally closed state when being electrified.
Preferably, the control branch comprises: the switching triode is connected with the adjusting resistor in parallel, and the auxiliary driving module is used for changing the on-off state of the triode according to the output signal of the main driving module.
Preferably, the control branch further comprises: the collector is connected with the control triode on the base of the switching triode, the base plate of the switching triode is connected with the power supply voltage, and the auxiliary driving module is connected with the base of the control triode; when the auxiliary driving module is connected with the control triode, the base electrode of the switching triode is changed into a low potential.
Preferably, the base of the switching triode is connected with the power supply voltage after being connected with the first current limiting resistor in series, and the base of the control triode is connected with the secondary driving module after being connected with the second current limiting resistor in series.
The invention also provides a control method of the switch device control circuit.
The control step of the switching-on transient process of the switching device comprises the following steps:
and 3, switching the resistance adjusting circuit to operate at the first resistance value in the stable switching-on stage.
The control step of the switching device switching-off transient process comprises the following steps:
and 2, in the stable turn-off stage, the resistance regulating circuit is switched to a third resistance value larger than the first resistance value to operate.
Compared with the prior art, the control end of the switching device is connected with the resistance adjusting circuit with the variable resistance in series, the change rate of interference signals of the switching device is reduced from the source, the resistance adjusting circuit can be quickly and accurately switched to different resistances, the resistance switching process has no retention time, the resistance adjusting circuit synchronously changes along with the working state of the switching device, and the interference suppression effect is obviously improved.
Drawings
The invention is described in detail below with reference to examples and figures, in which:
FIG. 1 is a schematic circuit connection diagram of the present invention;
FIG. 2 is a waveform diagram of a drive signal of the present invention;
FIG. 3 shows the variation of the ON current of the switch tube V0 in the time period t 1-t 2;
FIG. 4 shows the variation of the turn-off voltage of the switch tube V0 in the time period t 3-t 4.
Detailed Description
As shown in fig. 1, the switching device control circuit provided by the present invention includes: the switch device is a strong current on-off device controlled by the main driving module and is a main source of electromagnetic interference, and common switch devices are MOS (metal oxide semiconductor) tubes or IGBT (insulated gate bipolar transistor) tubes and other switch tubes. The gate of the switching tube V0 is the control end of the switching device, and the main driving module sends out a PWM signal to drive the switching tube V0 to turn on and off through the resistance adjusting circuit.
The resistance adjusting circuit comprises at least one adjusting resistor, the adjusting resistors are sequentially connected between the grid of the switching tube V0 and the main driving module in series, each adjusting resistor is provided with a control branch in parallel, each control branch works independently, and only the participation state of the corresponding adjusting resistor in the resistance adjusting circuit is controlled. Specifically, when a certain control branch is switched on, the adjusting resistor corresponding to the control branch is short-circuited, and the adjusting resistor does not participate in the driving operation of the switching tube V0; when one control branch is disconnected, the adjusting resistor corresponding to the control branch is normally connected in series to the resistor adjusting circuit, and the adjusting resistor participates in the driving work of the switching tube V0. The resistance value of the whole resistance regulating circuit can be quickly and accurately switched by changing the on-off state of the control branch circuit, so that the resistance value and the working state of the switch tube V0 are synchronously changed, the switch tube V0 is driven by the small resistance value under the normal working condition, the loss of the switch tube V0 is small, the switching-on speed is high, the efficiency is high, and when an interference signal needs to be inhibited, the switch tube V0 is driven by the large resistance to delay the voltage change rate and achieve the interference inhibiting effect.
Preferably, the resistance adjusting circuit further includes a fixed resistor R1, the resistance of the fixed resistor R1 is smaller than that of the fixed resistor, the fixed resistor R1 is also connected in series between the gate of the switching tube V0 and the main driving module, and the fixed resistor R1 participates in the driving operation of the switching tube V0 all the time, thereby playing a role in protecting the switching tube V0. When the control branch circuit is powered on, the control branch circuit is in a normally closed state, namely when the control branch circuit does not receive a disconnected control signal, the regulating resistor does not participate in the working state of the switching tube V0.
As shown in fig. 1, the control branch includes: the switching triode, the control triode and the auxiliary driving module are arranged in parallel, a collector of the switching triode is connected with one end of the adjusting resistor, an emitter of the switching triode is connected with the other end of the adjusting resistor, a base of the switching triode is connected with a collector of the control triode, an emitter of the control triode is connected with a low potential end, a base plate of the switching triode is connected with a power supply voltage VCC, the auxiliary driving module is connected with a base of the control triode, the auxiliary driving module changes the on-off state of the control triode according to an output signal of the main driving module, and the on-off state of the switching triode also.
The specific change process is as follows, when the auxiliary driving module is connected with the control triode, the base electrode of the switching triode is connected to the low potential end through the control triode, namely the base electrode of the switching triode is changed into low potential, the switching triode is disconnected, and the adjusting resistor participates in the driving work of the switching tube V0; when the auxiliary driving module disconnects the control triode, the base of the switching triode is connected with the power supply voltage VCC, namely the base of the switching triode is changed into high potential, the switching triode is switched on, and the regulating resistor participates in the driving work of the switch tube V0.
Preferably, in order to improve the efficiency and the safety of the circuit, the base of the switching triode is connected with the power supply voltage after being connected with the first current limiting resistor in series, and the base of the control triode is connected with the secondary driving module after being connected with the second current limiting resistor in series.
As shown in fig. 1, in a preferred embodiment, two adjusting resistors are provided in the resistance adjusting circuit, which are a first adjusting resistor R2 and a second adjusting resistor R3, respectively, and a control branch of the first adjusting resistor R2 includes: the driving circuit comprises a first switching triode V3, a first control triode V1 and a first auxiliary driving module. The control branch of the second regulating resistor R3 includes: a second switching transistor V4, a second control transistor V2 and a second secondary driving module. The first sub-driving module changes the on-off state of the first switching transistor V3 through the first control transistor V1, and the second sub-driving module changes the on-off state of the second switching transistor V4 through the second control transistor V2, the specific changing process of which is described in detail above.
As shown in fig. 2, in a preferred embodiment, the PWM signal output by the main driving module is at a high level within time t 0-t 3, the PWM signal output by the main driving module is at a low level within time t 3-t 5, fig. 3 shows a change in an on current of the switching tube V0 within time t 1-t 2, fig. 4 shows a change in an off voltage of the switching tube V0 within time t 3-t 4, the PWM1 signal output by the first sub-driving module is at a high level within time t 1-t 2, and the PWM2 signal output by the second sub-driving module is at a high level within time t 4-t 5.
The control step of the switching-on transient process of the switching device comprises the following steps:
and 3, a switching-on stable stage is carried out within the time of t 2-t 3, the resistance regulating circuit is switched to the first resistance value to operate, the current is stable in the stage, the voltage or the current of the switch tube V0 is not changed, the switch tube V is preferably driven by a small resistance value, the driving speed is high, and the switching loss is small.
The control step of the switching device switching-off transient process comprises the following steps:
It should be noted that, the switching on and off of the switching tube V0 are transient processes, and the suppression effect of electromagnetic interference is greatly affected by the rapidness and accuracy of the resistance change of the resistance adjusting circuit.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A switching device control circuit comprising: the main driving module drives the switching device through the resistance adjusting circuit; the resistance adjusting circuit is characterized by comprising at least one adjusting resistor which is sequentially connected in series between the control end of the switching device and the main driving module, each adjusting resistor is provided with a control branch circuit which works independently in parallel, and the corresponding adjusting resistor is short-circuited when the control branch circuits are switched on.
2. The switching device control circuit of claim 1 wherein the resistance adjustment circuit further comprises a fixed resistance in series with the adjustment resistance.
3. The switching device control circuit of claim 2, wherein the fixed resistor has a smaller resistance than the regulating resistor.
4. The switching device control circuit of claim 2 wherein said control branch is in a normally closed state when energized.
5. The switching device control circuit of claim 1, wherein the control branch comprises: the switching triode is connected with the adjusting resistor in parallel, and the auxiliary driving module changes the on-off state of the switching triode according to the output signal of the main driving module.
6. The switching device control circuit of claim 5, wherein the control branch further comprises: the collector electrode of the control triode is connected to the base electrode of the switching triode, the substrate of the switching triode is connected with a power supply voltage, and the auxiliary driving module is connected with the base electrode of the control triode;
and when the auxiliary driving module is connected with the control triode, the base electrode of the switching triode becomes a low potential.
7. The switching device control circuit of claim 6 wherein the base of the switching transistor is connected in series with a first current limiting resistor and then to a supply voltage.
8. The switching device control circuit of claim 6, wherein the base of the control transistor is connected in series with a second current limiting resistor and then connected to the secondary driving module.
9. A control method of a switching device control circuit, characterized in that the switching device control circuit employs the switching control circuit according to any one of claims 1 to 8;
the control step of the switching-on transient process of the switching device comprises the following steps:
step 1, in a switching-on delay stage, the resistance regulating circuit is switched to a first resistance value to operate;
step 2, in the initial stage of switching on, the resistance regulating circuit is switched to a second resistance value larger than the first resistance value to operate;
and 3, switching the resistance adjusting circuit to operate at the first resistance value in the switching-on and stable stage.
10. A control method of a switching device control circuit, characterized in that the switching device control circuit employs the switching control circuit according to any one of claims 1 to 8;
the control step of the switching device turn-off transient process comprises the following steps:
step 1, in an initial turn-off stage, the resistance adjusting circuit is switched to the first resistance value to operate;
and 2, in the stable turn-off stage, the resistance regulating circuit is switched to a third resistance value larger than the first resistance value to operate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010158523.4A CN111245412A (en) | 2020-03-09 | 2020-03-09 | Switching device control circuit and control method thereof |
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| CN202010158523.4A CN111245412A (en) | 2020-03-09 | 2020-03-09 | Switching device control circuit and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113489288A (en) * | 2021-07-19 | 2021-10-08 | 光华临港工程应用技术研发(上海)有限公司 | Low electromagnetic interference silicon carbide power semiconductor device driving circuit method |
| CN116470736A (en) * | 2022-01-12 | 2023-07-21 | 中兴通讯股份有限公司 | Adjustable driving unit, driving assembly, power conversion device and output control method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5986484A (en) * | 1996-07-05 | 1999-11-16 | Mitsubishi Denki Kabushiki Kaisha | Semiconductor device drive circuit with voltage surge suppression |
| CN102237781A (en) * | 2010-05-06 | 2011-11-09 | Ls产电株式会社 | Switching gate driver |
| CN103312186A (en) * | 2012-03-06 | 2013-09-18 | 三菱电机株式会社 | Switching-element drive circuit |
| CN103427809A (en) * | 2012-05-21 | 2013-12-04 | 永济新时速电机电器有限责任公司 | Protective circuit of insulated gate bipolar transistor |
| CN105471309A (en) * | 2014-09-30 | 2016-04-06 | 株式会社东芝 | Inverter control apparatus, power conversion apparatus, and electric vehicle |
| CN106656130A (en) * | 2016-09-22 | 2017-05-10 | 国电南瑞科技股份有限公司 | Segmented resistance type IGBT driving circuit and control method thereof |
| CN109618440A (en) * | 2019-01-30 | 2019-04-12 | 九阳股份有限公司 | A kind of electromagnetic heating control circuit and control method |
| CN110784097A (en) * | 2019-12-03 | 2020-02-11 | 珠海格力电器股份有限公司 | Driver of power module, intelligent power module and air conditioner |
| CN210129974U (en) * | 2019-01-30 | 2020-03-06 | 九阳股份有限公司 | Electromagnetic heating control circuit |
-
2020
- 2020-03-09 CN CN202010158523.4A patent/CN111245412A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5986484A (en) * | 1996-07-05 | 1999-11-16 | Mitsubishi Denki Kabushiki Kaisha | Semiconductor device drive circuit with voltage surge suppression |
| CN102237781A (en) * | 2010-05-06 | 2011-11-09 | Ls产电株式会社 | Switching gate driver |
| CN103312186A (en) * | 2012-03-06 | 2013-09-18 | 三菱电机株式会社 | Switching-element drive circuit |
| CN103427809A (en) * | 2012-05-21 | 2013-12-04 | 永济新时速电机电器有限责任公司 | Protective circuit of insulated gate bipolar transistor |
| CN105471309A (en) * | 2014-09-30 | 2016-04-06 | 株式会社东芝 | Inverter control apparatus, power conversion apparatus, and electric vehicle |
| CN106656130A (en) * | 2016-09-22 | 2017-05-10 | 国电南瑞科技股份有限公司 | Segmented resistance type IGBT driving circuit and control method thereof |
| CN109618440A (en) * | 2019-01-30 | 2019-04-12 | 九阳股份有限公司 | A kind of electromagnetic heating control circuit and control method |
| CN210129974U (en) * | 2019-01-30 | 2020-03-06 | 九阳股份有限公司 | Electromagnetic heating control circuit |
| CN110784097A (en) * | 2019-12-03 | 2020-02-11 | 珠海格力电器股份有限公司 | Driver of power module, intelligent power module and air conditioner |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113489288A (en) * | 2021-07-19 | 2021-10-08 | 光华临港工程应用技术研发(上海)有限公司 | Low electromagnetic interference silicon carbide power semiconductor device driving circuit method |
| CN116470736A (en) * | 2022-01-12 | 2023-07-21 | 中兴通讯股份有限公司 | Adjustable driving unit, driving assembly, power conversion device and output control method |
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