CN115877149A - Voltage-multiplying type pulse voltage-withstanding generator - Google Patents
Voltage-multiplying type pulse voltage-withstanding generator Download PDFInfo
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- CN115877149A CN115877149A CN202211665867.XA CN202211665867A CN115877149A CN 115877149 A CN115877149 A CN 115877149A CN 202211665867 A CN202211665867 A CN 202211665867A CN 115877149 A CN115877149 A CN 115877149A
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Abstract
The invention relates to a voltage-multiplying pulse withstand voltage generator, wherein the output of a waveform forming module is connected with a waveform adjusting output module, the waveform forming module comprises a charging resistor, the connection point of a stage capacitor and the charging resistor is connected with one end of a protection resistor, the other end of the protection resistor is connected with the collector of a triode, the base of the triode is connected with a synchronous switch module, the emitter of the triode is connected with one end of a discharging resistor, the other end of the discharging resistor is connected with the other end of the stage capacitor, the connection point of the stage capacitor and the discharging resistor is connected with the emitter and the discharging resistor of the triode of the next waveform forming module in series connection, and the discharging resistors of a plurality of groups of waveform forming modules are connected with the waveform adjusting output module. Compared with the prior art, the invention adopts a plurality of groups of waveform forming modules which are connected in series, achieves the effect of overlapping and doubling the peak value of the output waveform through the high-precision synchronous switch module, and outputs the voltage with multiple times of preset values.
Description
Technical Field
The invention relates to the field of pulse voltage generators, in particular to a voltage-multiplying pulse withstand voltage generator.
Background
In the current electronic industry, the requirement of an electronic component on the pulse withstand voltage test is higher and higher, so that the pulse voltage peak value required to be generated by a pulse withstand voltage generator is larger, the test frequency is faster, the size of the generator per se is smaller, and the existing technology needs to be improved and upgraded to meet the current requirement, wherein the pulse voltage generator adopted in the current industry is shown in fig. 2. The working principle of the existing pulse voltage generator is that a large capacitor is charged, and then a switch is used for discharging an inductor, a resistor and a load to generate waveforms. The existing control principle has the following defects:
1: the principle is that the voltage generated by a high-voltage source is only suitable for testing the peak value to be lower than 10KV-20 KV;
2: when the test voltage reaches above 15KV, the high-voltage switch, the main capacitor, the resistor and the inductor need to be synchronously improved in performance, and the performance improvement of the devices is high in cost;
3: when the test voltage is more than 15KV, under the condition that the device performance of all generators is improved, the volume of the devices is large, so that the whole volume of the generators is increased;
4: when the test voltage reaches above 15KV, the required charging time is long, and the required test frequency cannot be reached.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a voltage-doubling pulse withstand voltage generator, which adopts a plurality of groups of waveform forming modules connected in series, can connect a plurality of low-voltage waveform forming modules in series, and achieves the effect of overlapping and doubling the peak value of an output waveform through a high-precision synchronous switch module to output voltages with multiple preset values.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a withstand voltage generator of voltage-multiplying pulse, includes the waveform formation module of multiunit series connection and the synchro switch module of being connected with the waveform formation module, the output connection waveform adjustment output module of waveform formation module, the waveform formation module includes charging resistor, charging resistor's the positive pole of input voltage is connected to charging resistor's one end, charging resistor's the other end connect the one end of level electric capacity, the one end of protection resistor is connected to level electric capacity and charging resistor's tie point, the collecting electrode of triode is connected to protection resistor's the other end, the synchro switch module is connected to the base of triode, the one end of discharge resistor is connected to the projecting pole of triode, the other end of discharge resistor connects the other end of level electric capacity, the projecting pole of the next waveform formation module of series connection is connected to level electric capacity and discharge resistor's tie point, the negative pole of input voltage is connected with the discharge resistor of last group waveform formation module, the discharge resistor of multiunit waveform formation module connects waveform adjustment output module.
Furthermore, the synchronous switch module comprises an optical coupler, a light emitter end of the optical coupler is connected with an output end of the switch control module, and a light receiver end of the optical coupler is connected with a base electrode of the triode.
Furthermore, the light emitter of the optical coupler is a light emitting diode, the anode of the light emitting diode is connected with a first power supply voltage, the cathode of the light emitting diode is connected with the output end of the switch control module, one end of the light receiver of the optical coupler is connected with a second power supply voltage, and the other end of the light receiver is connected with the base of the triode.
Further, the light receiver is a photoresistor.
Furthermore, the waveform adjustment output module comprises two adjusting resistors connected in series and an adjusting capacitor connected in series with the adjusting resistors, and the adjusting resistors and the adjusting capacitor connected in series are connected in parallel with two ends of the discharge resistor.
Furthermore, the connection point between the two adjusting resistors is connected with the anode of the output voltage, and the connection point between the adjusting capacitor and the discharging resistor is connected with the cathode of the output voltage.
Furthermore, the input end of the switch control module is connected with the first output end of the CPU main control module.
Furthermore, the input end of the CPU main control module is connected with the output end of the touch screen control module.
Further, the input voltage is output by a high-voltage charging module.
Furthermore, the input end of the high-voltage charging module is connected with the second output end of the CPU main control module.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the invention, a plurality of groups of waveform forming modules connected in series are adopted, a plurality of low-voltage waveform forming modules can be connected in series, the effect of overlapping and doubling the peak value of an output waveform is achieved through a high-precision synchronous switch module, the voltage with multiple preset values is output, the charging time is reduced, and the low-voltage waveform forming modules are ensured to be in a long-time low-voltage state, so that the charging device is more reliable and safer.
(2) The invention adopts a plurality of groups of waveform forming modules which are connected in series, the performance and the volume of the waveform forming modules are completely the same, and the performance indexes of a high-voltage switch, a main capacitor, a resistor and an inductor, such as a maximum voltage index, a power index, a volume index and the like, which need to be improved because of overlarge voltage which needs to be output can be avoided.
(3) The invention adopts the waveform adjusting output module, and can adjust the rising time and the waveform overshoot of the actual output waveform.
Drawings
FIG. 1 is a principal circuit diagram of an embodiment of the present invention;
FIG. 2 is a diagram of a conventional pulse voltage generator;
FIG. 3 is a block diagram of a synchronous switch module according to an embodiment of the present invention;
FIG. 4 is a block diagram of the present invention;
in the figure, R8 is a first charging resistor, R9 is a second charging resistor, R10 is a third charging resistor, R7 is a first protection resistor, R1 is a second protection resistor, R6 is a third protection resistor, C3 is a first capacitor, C2 is a second capacitor, C1 is a first capacitor, Q3 is a first triode, Q2 is a second triode, Q1 is a third triode, R3 is a first discharging resistor, R2 is a second discharging resistor, R5 is a third discharging resistor, R4 is a first adjusting resistor, R11 is a second adjusting resistor, C1 is an adjusting capacitor, U1 is a first optocoupler, U2 is a second optocoupler, and U3 is a third optocoupler.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1:
the invention provides a voltage-multiplying pulse withstand voltage generator which comprises a plurality of groups of waveform forming modules connected in series and a synchronous switch module connected with the waveform forming modules, wherein the output of the waveform forming modules is connected with a waveform adjusting output module, each waveform forming module comprises a charging resistor, one end of the charging resistor is connected with the positive pole of an input voltage, the other end of the charging resistor is connected with one end of a stage capacitor, the connection point of the stage capacitor and the charging resistor is connected with one end of a protection resistor, the other end of the protection resistor is connected with a collector of a triode, the base of the triode is connected with the synchronous switch module, the emitter of the triode is connected with one end of a discharging resistor, the other end of the discharging resistor is connected with the other end of the stage capacitor, the connection point of the stage capacitor and the discharging resistor is connected with the emitter of the triode of the next waveform forming module connected in series, the connection point of the stage capacitor and the discharging resistor is also connected with the discharging resistor of the next waveform forming module connected in series, the connection point of the stage capacitor and the discharging resistor of the last group of the waveform forming modules is connected with the negative pole of the input voltage, and the discharging resistors of the waveform forming modules are connected with the waveform adjusting output module.
The synchronous switch module comprises an optical coupler, a light emitter end of the optical coupler is connected with an output end of the switch control module, and a light receiver end of the optical coupler is connected with a base electrode of the triode. The light-emitting device of the optical coupler is a light-emitting diode, the anode of the light-emitting diode is connected with a first power supply voltage, the cathode of the light-emitting diode is connected with the output end of the switch control module, one end of the light receiver of the optical coupler is connected with a second power supply voltage, and the other end of the light receiver is connected with the base electrode of the triode. In some embodiments, the light receptor is a photoresistor.
The waveform adjusting output module comprises two adjusting resistors connected in series and an adjusting capacitor connected in series with the adjusting resistors, and the adjusting resistors and the adjusting capacitor connected in series are connected in parallel at two ends of the discharging resistor. The connection point between the two adjusting resistors is connected with the anode of the output voltage, and the connection point between the adjusting capacitor and the discharging resistor is connected with the cathode of the output voltage.
The input end of the switch control module is connected with the first output end of the CPU main control module. The input end of the CPU main control module is connected with the output end of the touch screen control module. The input voltage is output by the high-voltage charging module. The input end of the high-voltage charging module is connected with the second output end of the CPU main control module. The structure of the module of the invention is shown in figure 4.
When the touch screen control module works, the CPU main control module obtains the voltage value, the test interval, the test times and other instructions output by the touch screen control module and sends the instructions to the switch control module. The CPU main control module firstly controls the input voltage connected with the waveform forming module to pass through the charging resistor to charge the stage capacitor, and controls the stage capacitor to be charged to a preset voltage value. After the preset voltage value is reached, the switch control module sends simultaneous TT signals to a light emitter of the optocoupler of the synchronous switch module according to the acquired preset test interval, and controls a light receiver of the optocoupler to start working at the same time. And the second power supply voltage is led to the base electrode of the triode through a light receiver of the optical coupler, and the triode is conducted simultaneously. After the triode is conducted, the stage capacitor discharges to the discharge resistor. The discharging resistor is connected with the waveform adjusting output module and finally outputs voltage. The two ends of the output voltage are tested to the preset voltage value which is several times of the group of the waveform forming modules.
The switch control module of the invention adopts the optical fiber parallel triggering technology, and ensures that the superposed pulse waveform is continuous and continuous.
The input voltage of the invention is from the high-voltage input module, and the CPU main control module controls the high-voltage input module to output the input voltage to charge the stage capacitor.
By adjusting the parameters of the adjusting resistor and the adjusting capacitor of the waveform adjusting output module, the rising time of the discharge pulse and the overshoot and oscillation of the maximum peak value can be adjusted. The time width of the discharge pulse can be adjusted by adjusting the parameters of the stage resistance and the discharge resistance. The charging resistor can adjust the charging time. The protective resistor is used for limiting current.
Taking the waveform forming module as 3 groups as an example, the main circuit diagram of the voltage-doubling pulse withstand voltage generator is shown in fig. 1. In this example, the drawings for the various components are illustrated as follows: the charging circuit comprises a R8 first charging resistor, a R9 second charging resistor, a R10 third charging resistor, a R7 first protection resistor, a R1 second protection resistor, a R6 third protection resistor, a C3 first-stage capacitor, a C2 second-stage capacitor, a C1 first-stage capacitor, a Q3 first triode, a Q2 second triode, a Q1 third triode, a R3 first discharging resistor, a R2 second discharging resistor, a R5 third discharging resistor, a R4 first adjusting resistor, a R11 second adjusting resistor, a C1 adjusting capacitor, a U1 first optical coupler, a U2 second optical coupler and a U3 third optical coupler.
In this example, the charging resistances are R8, R9, and R10. One end of R8, R9, and R10 is connected to the positive electrode HVIN + of the input voltage. The other end of the charging resistor is connected with one end of a stage capacitor, the stage capacitor is C1, C2 and C3, R8 is connected with C3, R9 is connected with C2, and R10 is connected with C1. The connecting point of the stage capacitor and the charging resistor is connected with one end of the protection resistor. The protection resistances are R1, R6 and R7. The other end of the protective resistor is connected with the collector of the triode. The triodes are Q1, Q2 and Q3. The base electrode of the triode is connected with the synchronous switch module, and the emitting electrode of the triode is connected with one end of the discharge resistor. The discharge resistances are R2, R3 and R5. The other end of the discharge resistor is connected with the other end of the stage capacitor, the connecting point of the stage capacitor and the discharge resistor is connected with the emitting electrode of the triode of the next waveform forming module in series, and the connecting point of the stage capacitor and the discharge resistor is also connected with the discharge resistor of the next waveform forming module in series. In the figure, the emitter of Q2 and R2 are connected to the connection point of C3 and R3, and the emitter of Q1 and R5 are connected to the connection point of C2 and R2. C1 and R5 are stage capacitors and discharge resistors of the last group of waveform forming modules, and the connection point of C1 and R5 is connected with the negative electrode HVIN-of the input voltage.
Since the waveform forming modules are 3 groups, the corresponding synchronous switching modules are also 3 groups. The structure of the synchronous switch module is shown in fig. 3. The synchronous switch module comprises 3 optocouplers U1, U2 and U3. And the light emitter end of the optical coupler is connected with the output end of the switch control module and receives a signal sent by the output end of the switch control module. The light receiver ends of the U1, the U2 and the U3 are connected with the base electrode of the triode. In this example, the light emitters of U1, U2, and U3 are light emitting diodes. The anode of the light-emitting diode is connected with the first power supply voltage, and the cathode of the light-emitting diode is connected with the output end of the switch control module. The light receivers of the U1, the U2 and the U3 are photoresistors, one end of each light receiver is connected with a second power supply voltage, and the other end of each light receiver is connected with the base of the triode.
The waveform adjusting output module comprises two adjusting resistors R4 and R11 which are connected in series and an adjusting capacitor C4 which is connected with the adjusting resistors in series, and the adjusting resistors R4 and R11 and the adjusting capacitor C4 which are connected in series are connected to two ends of the discharging resistors R2, R3 and R5 in parallel. The junction point between the two regulating resistors R4 and R11 is connected to the positive HVOUT + of the output voltage and the junction point of the regulating capacitor and the discharge resistor is connected to the negative HVOUT-of the output voltage.
As shown in fig. 1 and 3, in this embodiment, the CPU main control module obtains the voltage value, the test interval, the test frequency, and other instructions output by the touch screen control module, and sends the instructions to the switch control module. The CPU main control module firstly controls the input voltage connected with the waveform forming module to charge the stage capacitors C1, C2 and C3 through the charging resistors R8, R9 and R10, and controls the stage capacitors C1, C2 and C3 to be charged to a preset voltage value. After reaching predetermined magnitude of voltage, the on-off control module sends simultaneous TT signal to the illuminator of opto-coupler U1, U2 and U3 of synchro switch module according to the predetermined test interval that acquires, and U1, U2 and U3 simultaneous workings, through the photic ware of opto-coupler U1, U2 and U3, on leading second supply voltage to triode Q1, Q2 and Q3's base, triode Q1, Q2 and Q3 switch on simultaneously. After the triodes Q1, Q2 and Q3 are conducted, the stage capacitors C1, C2 and C3 discharge to the discharge resistors R2, R3 and R5. The discharging resistors R2, R3 and R5 are connected with the waveform adjusting output module, and 3 times of preset voltage value can be measured between HVOUT + and HVOUT-because the waveform forming module comprises 3 groups.
By adjusting the parameters of the adjusting resistors R4 and R11 and the adjusting capacitor C4 of the waveform adjusting output module of the embodiment, the rising time of the discharge pulse and the overshoot and oscillation of the maximum peak value can be adjusted. By adjusting the parameters of the stage resistors C1, C2, and C3 and the discharge resistors R2, R3, and R5, the time width of the discharge pulse can be adjusted. The charging resistors R8, R9 and R10 can adjust the charging time. The protective resistors R1, R6 and R7 are used for current limiting.
In some embodiments, the waveform forming module has 10 groups, and the number of the stage capacitors is 10, so that 10 times of the preset voltage value can be output.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The utility model provides a withstand voltage generator of voltage-multiplying pulse, its characterized in that, including the waveform formation module of multiunit series connection and the synchro switch module of being connected with the waveform formation module, the output connection waveform adjustment output module of waveform formation module, the waveform formation module includes charging resistor, the positive pole of input voltage is connected to charging resistor's one end, and the one end of level electric capacity is connected to charging resistor's the other end, and the one end of protection resistor is connected to level electric capacity and charging resistor's tie point, and the collecting electrode of triode is connected to protection resistor's the other end, the synchro switch module is connected to the base of triode, and the one end of discharge resistor is connected to the projecting pole of triode, and the other end of discharge resistor connects the other end of level electric capacity, and level electric capacity and discharge resistor's tie point are connected the projecting pole of the triode of the next waveform formation module of series connection, and the discharge resistor's of last group waveform formation module tie point of level electric capacity and discharge resistor connect the negative pole of input voltage, and the discharge resistor connection waveform adjustment output module of multiunit.
2. The voltage-multiplying pulse voltage-withstanding generator according to claim 1, wherein the synchronous switch module comprises an optical coupler, a light emitter end of the optical coupler is connected to an output end of the switch control module, and a light receiver end of the optical coupler is connected to a base of the triode.
3. The voltage-multiplying pulse voltage-withstanding generator according to claim 2, wherein the light emitter of the optical coupler is a light emitting diode, an anode of the light emitting diode is connected to the first power supply voltage, a cathode of the light emitting diode is connected to the output terminal of the switch control module, one end of the light receiver of the optical coupler is connected to the second power supply voltage, and the other end of the light receiver is connected to a base of the triode.
4. The voltage-doubling pulse withstand voltage generator according to claim 3, wherein the light receiver is a photo resistor.
5. The voltage-multiplying pulse withstand voltage generator according to claim 1, wherein the waveform adjusting output module comprises two adjusting resistors connected in series and an adjusting capacitor connected in series with the adjusting resistors, and the adjusting resistors and the adjusting capacitor connected in series are connected in parallel across the discharge resistor.
6. The voltage-doubling pulse withstand voltage generator according to claim 5, wherein a connection point between the two regulating resistors is connected to a positive electrode of the output voltage, and a connection point between the regulating capacitor and the discharge resistor is connected to a negative electrode of the output voltage.
7. The voltage-multiplying pulse voltage-withstanding generator according to claim 2, wherein an input terminal of the switch control module is connected to the first output terminal of the CPU main control module.
8. The voltage-multiplying pulse voltage-withstanding generator according to claim 7, wherein an input end of the CPU main control module is connected to an output end of the touch screen control module.
9. The voltage-doubling pulse withstand voltage generator according to claim 7, wherein the input voltage is output by the high-voltage charging module.
10. The voltage-multiplying pulse withstand voltage generator according to claim 9, wherein an input terminal of the high-voltage charging module is connected to the second output terminal of the CPU main control module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211665867.XA CN115877149A (en) | 2022-12-23 | 2022-12-23 | Voltage-multiplying type pulse voltage-withstanding generator |
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| CN202211665867.XA CN115877149A (en) | 2022-12-23 | 2022-12-23 | Voltage-multiplying type pulse voltage-withstanding generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117554770A (en) * | 2024-01-11 | 2024-02-13 | 中国电力科学研究院有限公司 | Power electronic lightning pulse waveform generation method, system and storage medium |
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2022
- 2022-12-23 CN CN202211665867.XA patent/CN115877149A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117554770A (en) * | 2024-01-11 | 2024-02-13 | 中国电力科学研究院有限公司 | Power electronic lightning pulse waveform generation method, system and storage medium |
| CN117554770B (en) * | 2024-01-11 | 2024-04-02 | 中国电力科学研究院有限公司 | Power electronic lightning pulse waveform generation method, system and storage medium |
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