CN205679731U - A kind of test circuit using PWM control IGBT power amplifier - Google Patents
A kind of test circuit using PWM control IGBT power amplifier Download PDFInfo
- Publication number
- CN205679731U CN205679731U CN201620482918.9U CN201620482918U CN205679731U CN 205679731 U CN205679731 U CN 205679731U CN 201620482918 U CN201620482918 U CN 201620482918U CN 205679731 U CN205679731 U CN 205679731U
- Authority
- CN
- China
- Prior art keywords
- circuit
- power amplifier
- resistance
- output
- igbt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Amplifiers (AREA)
Abstract
The utility model discloses a kind of test circuit using PWM control IGBT power amplifier, comprising: PWM produces circuit, IGBT power amplifier and feedback control circuit；IGBT power amplifier includes IGBT pipe Q1 and filter circuit, feedback control circuit includes the first operational amplifier U1, the second operational amplifier U2, resistance R1, resistance R2 and resistance R3, PWM produces circuit and includes triangular-wave generator P1, comparator U3 and diode D1, wherein, one end of resistance R1 is as voltage signal inputs, and the output of filter circuit is as voltage signal output end.The utility model achieves the control of the output electric current to IGBT power amplifier.
Description
Technical field
The utility model relates to control circuit technical field, particularly to a kind of test using PWM control IGBT power amplifier
Use circuit.
Background technology
With the development of electronic technology, present discrete device also constantly minimizes, and its power is also increasing,
Maximum current has reached KA level, and in order to ensure the reliability of discrete device, needs to test the power of discrete device.Test
Need during these devices to utilize power amplifier to load electric current big accordingly, and current technology power tube must use Linear Amplifer
Pipe, but used Linear Amplifer pipe maximum output current is less than 200A, can not load corresponding electric current to high power device.
Utility model content
In view of this, the utility model provides a kind of test circuit using PWM control IGBT power amplifier, and it achieves right
The control of the output electric current of IGBT power amplifier, exportable KA level electric current, it is primarily adapted for use in test high power device field.
The utility model solves the problems referred to above by techniques below means:
A kind of test circuit using PWM control IGBT power amplifier of the present utility model, comprising: PWM produces circuit, IGBT
Power amplifier and feedback control circuit；Described IGBT power amplifier includes IGBT pipe Q1 and filter circuit, described IGBT pipe Q1's
Emitter stage is connected with the input of described filter circuit, and the colelctor electrode of described IGBT pipe Q1 is connected with power output end；Described instead
Feedback control circuit includes the first operational amplifier U1, the second operational amplifier U2, resistance R1, resistance R2 and resistance R3, described electricity
One end of resistance R1 as voltage signal inputs, the other end of described resistance R1 anti-with described first operational amplifier U1 respectively
One end of phase input and described resistance R2 connects, the output of the other end of described resistance R2 and described second operational amplifier U2
End connects, the in-phase input end ground connection of described first operational amplifier U1, the inverting input of described second operational amplifier U2
It is connected with the output of described second operational amplifier U2, the in-phase input end of described second operational amplifier U2 and described filtering
The output of circuit connects, and by described resistance R3 ground connection；Described PWM produces circuit and includes triangular-wave generator P1, compares
Device U3 and diode D1, the signal output part of described triangular-wave generator P1 is connected with the inverting input of described comparator U3,
The in-phase input end of described comparator U3 is connected with the output of described first operational amplifier U1, the output of described comparator U3
End is divided into two-way, and a road is connected with the grid of described IGBT pipe Q1, and another road is connected with the negative electrode of described diode D1, and described two
The plus earth of pole pipe D1.
Further, described IGBT power amplifier also includes commutating circuit, and described commutating circuit includes double-point double-throw switch K1,
The in-phase input end of described second operational amplifier U2 is by the output of described double-point double-throw switch K1 and described filter circuit
Connect, as current signal output end between two common ports of described double-point double-throw switch K1.
Further, described filter circuit includes inductance L1 and electric capacity C1, one end of described inductance L1 and described IGBT pipe Q1
Emitter stage connect, the other end of described inductance L1 is divided into two-way, and a road is connected with the input of described double-point double-throw switch K1,
Described electric capacity C1 of separately leading up to is grounded.
Further, the rated voltage of described triangular-wave generator is 5V, and frequency is 10KHZ.
Further, the magnitude of voltage of described power supply is 40V.
The test circuit of a kind of PWM of employing of the present utility model control IGBT power amplifier has the advantages that
The utility model provides a kind of test circuit using PWM control IGBT power amplifier, and triangular-wave generator is used for
Producing the triangular wave of certain frequency, and the inverting input of triangular wave input comparator that will produce, feedback control circuit is by the
The voltage signal of one operational amplifier output inputs to the in-phase input end of comparator, after two signals are compared by comparator
Output PWM ripple, and this PWM ripple is sent into IGBT power amplifier, the electric current for controlling IGBT power amplifier exports, and IGBT work(
The voltage of electric discharge road output can feed back to feedback control circuit, thus constitutes a closed-loop system, it is achieved that to IGBT power amplifier electricity
The control of the output electric current on road, exportable KA level electric current, it is primarily adapted for use in test high power device field；In addition, this practicality is new
Type is connected to double-point double-throw switch, forward and reverse switching of the output voltage to IGBT power amplifier can be realized, applied widely.
Brief description
With embodiment, the utility model is further described below in conjunction with the accompanying drawings.
Fig. 1 is the circuit diagram of a kind of test circuit using PWM control IGBT power amplifier of the present utility model；
Fig. 2 is the waveform diagram that PWM of the present utility model produces circuit.
Detailed description of the invention
Below with reference to accompanying drawing, the utility model is described in detail, as shown in Figure 1: a kind of employing of the present embodiment
The test circuit of PWM control IGBT power amplifier includes: PWM produces circuit the 101st, IGBT power amplifier 102 and feedback control circuit
103。
Described IGBT power amplifier 102 includes IGBT pipe Q1 and filter circuit, the emitter stage of described IGBT pipe Q1 with described
The input of filter circuit connects, and the colelctor electrode of described IGBT pipe Q1 is connected with power output end.
Described feedback control circuit 103 includes the first operational amplifier U1, the second operational amplifier U2, resistance R1, resistance
R2 and resistance R3, one end of described resistance R1 is as voltage signal inputs, and the other end of described resistance R1 is respectively with described
One end of the inverting input of one operational amplifier U1 and described resistance R2 connects, the other end of described resistance R2 and described second
The output of operational amplifier U2 connects, and the in-phase input end ground connection of described first operational amplifier U1, described second computing is put
The inverting input of big device U2 is connected with the output of described second operational amplifier U2, and described second operational amplifier U2's is same
Phase input is connected with the output of described filter circuit, and by described resistance R3 ground connection, the output of described filter circuit
As voltage signal output end.
Described PWM produces circuit 101 and includes triangular-wave generator P1, comparator U3 and diode D1, and described triangular wave is sent out
The signal output part of raw device P1 is connected with the inverting input of described comparator U3, the in-phase input end of described comparator U3 and institute
The output stating the first operational amplifier U1 connects, and the output of described comparator U3 is divided into two-way, and a road is managed with described IGBT
The grid of Q1 connects, and another road is connected with the negative electrode of described diode D1, the plus earth of described diode D1.
In the present embodiment, the rated voltage of described triangular-wave generator is 5V, and frequency is 10KHZ.
Concrete, as illustrated in fig. 2, it is assumed that the output signal of triangular-wave generator is V-, the first operational amplifier U1's is defeated
Going out signal is V1, and V-is compared by comparator U3 with V1, and the waveform V2 obtaining is as shown in Figure 2.
Further, described IGBT power amplifier also includes commutating circuit, and described commutating circuit includes double-point double-throw switch
K1, the output by described double-point double-throw switch K1 and described filter circuit for the in-phase input end of described second operational amplifier U2
End connects, as current signal output end between two common ports of described double-point double-throw switch K1.
When actually used, resistance R0 is connected in parallel between two control ends of double-point double-throw switch K1.
In the present embodiment, described first operational amplifier U1, the source nominal of the second operational amplifier U2 and comparator U3
Voltage is ± 15V.
In the present embodiment, described filter circuit includes inductance L1 and electric capacity C1, one end of described inductance L1 and described IGBT
The emitter stage of pipe Q1 connects, and the other end of described inductance L1 is divided into two-way, the input of a road and described double-point double-throw switch K1
Connecting, described electric capacity C1 of separately leading up to is grounded.
In the present embodiment, the magnitude of voltage of described power supply is 40V.
When actually used, the resistance of replaceable resistance R3, for improving the output electric current of IGBT power amplifier.
The utility model provides a kind of circuit using PWM control IGBT power amplifier, and triangular-wave generator is used for generation one
Determining the triangular wave of frequency, and the inverting input of the triangular wave input comparator by generation, feedback control circuit is by the first computing
The voltage signal of amplifier output inputs to the in-phase input end of comparator, and comparator exports after comparing two signals
PWM ripple, and this PWM ripple is sent into IGBT power amplifier, the voltage for controlling IGBT power amplifier exports, and IGBT power amplifier electricity
The voltage of road output can feed back to feedback control circuit, thus constitutes a closed-loop system, it is achieved that to IGBT power amplifier
The control of output electric current, exportable KA level electric current, it is primarily adapted for use in test high power device field；In addition, in the utility model
It is connected to double-point double-throw switch, forward and reverse switching of the output voltage to IGBT power amplifier can be realized, applied widely.
Finally illustrating, above example is only in order to illustrating the technical solution of the utility model and unrestricted, although ginseng
According to preferred embodiment, the utility model is described in detail, it will be understood by those within the art that, can be to this
The technical scheme of utility model is modified or equivalent, without deviating from objective and the model of technical solutions of the utility model
Enclosing, it all should be covered in the middle of right of the present utility model.
Claims (5)
1. the test circuit using PWM control IGBT power amplifier, it is characterised in that: include: PWM produces circuit, IGBT work(
Electric discharge road and feedback control circuit；
Described IGBT power amplifier includes IGBT pipe Q1 and filter circuit, the emitter stage of described IGBT pipe Q1 and described filter circuit
Input connect, the colelctor electrode of described IGBT pipe Q1 is connected with power output end；
Described feedback control circuit includes the first operational amplifier U1, the second operational amplifier U2, resistance R1, resistance R2 and resistance
R3, one end of described resistance R1 is as voltage signal inputs, and the other end of described resistance R1 is put with described first computing respectively
One end of the inverting input of big device U1 and described resistance R2 connects, the other end of described resistance R2 and described second operation amplifier
The output of device U2 connects, the in-phase input end ground connection of described first operational amplifier U1, described second operational amplifier U2's
Inverting input is connected with the output of described second operational amplifier U2, the in-phase input end of described second operational amplifier U2
It is connected with the output of described filter circuit, and by described resistance R3 ground connection；
Described PWM produces circuit and includes triangular-wave generator P1, comparator U3 and diode D1, described triangular-wave generator P1's
Signal output part is connected with the inverting input of described comparator U3, the in-phase input end of described comparator U3 and described first fortune
The output calculating amplifier U1 connects, and the output of described comparator U3 is divided into two-way, the grid of a road and described IGBT pipe Q1
Connecting, another road is connected with the negative electrode of described diode D1, the plus earth of described diode D1.
2. a kind of test circuit using PWM control IGBT power amplifier according to claim 1, it is characterised in that: described
IGBT power amplifier also includes commutating circuit, and described commutating circuit includes double-point double-throw switch K1, described second operational amplifier
The in-phase input end of U2 is connected with the output of described filter circuit by described double-point double-throw switch K1, and described DPDT is opened
Close between two common ports of K1 as current signal output end.
3. a kind of test circuit using PWM control IGBT power amplifier according to claim 2, it is characterised in that: described
Filter circuit includes inductance L1 and electric capacity C1, and one end of described inductance L1 is connected with the emitter stage of described IGBT pipe Q1, described electricity
The other end of sense L1 is divided into two-way, and a road is connected with the input of described double-point double-throw switch K1, separately leads up to described electric capacity
C1 is grounded.
4. a kind of test circuit using PWM control IGBT power amplifier according to claim 1, it is characterised in that: described
The rated voltage of triangular-wave generator is 5V, and frequency is 10KHZ.
5. a kind of test circuit using PWM control IGBT power amplifier according to claim 1, it is characterised in that: described
The magnitude of voltage of power supply is 40V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620482918.9U CN205679731U (en) | 2016-05-25 | 2016-05-25 | A kind of test circuit using PWM control IGBT power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620482918.9U CN205679731U (en) | 2016-05-25 | 2016-05-25 | A kind of test circuit using PWM control IGBT power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205679731U true CN205679731U (en) | 2016-11-09 |
Family
ID=57436554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620482918.9U Active CN205679731U (en) | 2016-05-25 | 2016-05-25 | A kind of test circuit using PWM control IGBT power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205679731U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019113A (en) * | 2016-05-25 | 2016-10-12 | 陕西开尔文测控技术有限公司 | Testing circuit using PWM to control IGBT power amplifier |
| CN108205074A (en) * | 2016-12-16 | 2018-06-26 | 上海新微技术研发中心有限公司 | Saturation voltage measuring circuit and method based on IGBT module |
-
2016
- 2016-05-25 CN CN201620482918.9U patent/CN205679731U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019113A (en) * | 2016-05-25 | 2016-10-12 | 陕西开尔文测控技术有限公司 | Testing circuit using PWM to control IGBT power amplifier |
| CN108205074A (en) * | 2016-12-16 | 2018-06-26 | 上海新微技术研发中心有限公司 | Saturation voltage measuring circuit and method based on IGBT module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103973114A (en) | Constant power control direct-current power supply | |
| CN104617779B (en) | Bidirectional-resonance bridge type modular multi-level switched capacitor DC-AC converter | |
| CN107834838B (en) | A kind of control method of non-isolation type Three-phase PFC | |
| CN104883139B (en) | A kind of double switch power modulator for envelope-tracking system | |
| CN205679731U (en) | A kind of test circuit using PWM control IGBT power amplifier | |
| CN106019113A (en) | Testing circuit using PWM to control IGBT power amplifier | |
| CN206117506U (en) | Invariable turn -on time control buck converter multiple -pulse bunch is sent out and to be improved device | |
| CN106452146A (en) | Multi-level converter submodule circuit and multi-level converter | |
| CN103780118A (en) | Resonant DC link three-level soft switching inverter circuit | |
| CN206962704U (en) | Suspension-driven auxiliary power supply circuit | |
| CN103312131B (en) | A kind of high frequency dc to dc converter switching tube turn-off speed method of real-time adjustment | |
| CN104901404A (en) | Charging circuit and output control method | |
| CN104242645A (en) | Method and device for controlling step-down circuits | |
| CN206341137U (en) | A kind of asynchronous serial switching power unit | |
| CN207099044U (en) | A kind of PWM wave generation circuits | |
| CN203827177U (en) | A voltage step-down type conversion circuit and an electronic device | |
| CN107786086A (en) | Constant on-time control Buck converter multiple-pulses cluster hair improves device | |
| CN207910746U (en) | A kind of controllable power supply circuit of sequential | |
| CN203434855U (en) | Control circuit applied to power factor correction circuit | |
| CN203773393U (en) | Negative-voltage constant current source circuit | |
| CN110224621A (en) | A kind of inversion drive system of ultralow switching power loss, ultralow output end electromagnetic interference | |
| CN107612378A (en) | A kind of piezoelectric energy acquisition device and its rectification circuit | |
| CN103916008A (en) | Output capacitance voltage-sharing control system and control method for three-level DC converter | |
| CN204013224U (en) | Power supply changeover device | |
| CN106371491B (en) | High voltage generating circuit, method, power control circuit and electronic system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |