CN203289332U - High-frequency high-voltage generator for heating dielectric material - Google Patents
High-frequency high-voltage generator for heating dielectric material Download PDFInfo
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- CN203289332U CN203289332U CN2013203658220U CN201320365822U CN203289332U CN 203289332 U CN203289332 U CN 203289332U CN 2013203658220 U CN2013203658220 U CN 2013203658220U CN 201320365822 U CN201320365822 U CN 201320365822U CN 203289332 U CN203289332 U CN 203289332U
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Abstract
The utility model belongs to the technical field of high-frequency high-voltage generator, specifically relates to a high-frequency high-voltage generator which utilizes dielectric loss and resistive loss to perform composite heating on dielectric materials, and can be used for heating solid fuel to a cracking temperature. The generator mainly consists of three parts, i.e., a rectification device, an impulse type current stabilizer, and resonance type current inverter. Finally, after acquired high-frequency alternating current is boosted through a boosting transformer, high-voltage high-frequency electricity whose frequency is 75kHz and whose voltage can reach 8kV to the maximum can be obtained. Thus heating of an oil shale sample can be realized, after heating for two hours, the temperature of a middle area of a thermocouple measuring electrode can reach 300 DEG C.
Description
Technical field
The utility model belongs to the high-frequency and high-voltage generator technical field, is specifically related to a kind of dielectric loss and resistance loss of utilizing and dielectric material is carried out the high-frequency and high-voltage generator of composite heating, can be used for solid fuel is heated to cracking temperature.
Background technology
For utilizing dielectric loss and resistance loss heating dielectric material must use the high-power high-frequency generator.Because the resistivity of material is large, dielectric constant is high, and along with heating, changes, and therefore to radio-frequency generator, has proposed very high requirement.
The utility model content
Study and a kind ofly can, in the situation that input power is constant, the large volume dielectric material be heated to the high-frequency and high-voltage generator of 500～600 ° of C.
As shown in Figure 1, dielectric material heating described in the utility model is comprised of rectifying device, pulsed flow straightener, three parts of resonant mode current inverter with high-frequency and high-voltage generator.
As shown in Figure 2 in the generator principle, rectifying device is comprised of four diodes of VD1-VD4 and C1, two electric capacity of C2.The anode of VD1 is connected with the negative electrode of VD3, the anode of VD2 is connected with the negative electrode of VD4, and the negative electrode of VD1 is connected with the negative electrode of VD2, then with the capacitor C1 of parallel connection and the end of C2, is connected, the anode of VD3 anode and VD4 is connected, and then with the capacitor C 1 of parallel connection and the other end of C2, is connected.The anode of the live wire access VD1 of input power, the anode of zero line access VD2, between the negative electrode of VD2 and VD4 anode, output voltage is the direct current of 300V.Capacitor C1 and C2 will further filter out the burr in the diode output signal, thus the more level and smooth 300V direct current of output.
The pulsed flow straightener is by VD5, VD6, three diodes of VD7, transformer TV1, and triode VT1, capacitor C 3, current transformer TA1 and chip CS form.The negative electrode of diode VD6 is connected with the negative electrode of VD7, and then both anodes are connected with two inputs of transformer TV1 respectively, plays the effect of protection transformer.The collector electrode of triode VT1 is connected with the anode of diode VD6, grounded emitter, and base stage is connected with chip CS.Voltage will become the alternating current of 1kV after transformer TV1.The anode of diode VD5 is connected with the output of transformer TV1, and the negative electrode of diode VD5 is connected with an end of capacitor C 3, and the other end of capacitor C3 is connected with another output of transformer TV1.The 1kV alternating current of TV1 output will become the 1kV direct current after the rectification of VD5 and C3 and filter action.Be connected with the end of current transformer TA1 after one end of the negative electrode of diode VD5 and capacitor C 3 is connected, simultaneously, the two ends of TA1 are connected with chip CS again, play the output voltage feedback, and then control the effect that triode VT1 closes or opens.Therefore, the pulsed flow straightener will be exported the 1kV direct current finally.
The resonant mode current inverter is comprised of VT2, VT3, VT4, four IGBT of VT5, transformer TV2, inductance L 1 and chip CS.The emitter of VT2 is connected with the collector electrode of input of TV2 and VT4 simultaneously, and its collector electrode is connected with the live wire of from the pulsed flow straightener, drawing, and grid is connected with chip CS.The collector electrode of VT3 also is connected with live wire, and emitter is connected with the collector electrode of VT5 and another input of TV2 simultaneously, and grid is connected with chip CS.The emitter of VT4 and VT5 is connected with the zero line of from the pulsed flow straightener, drawing simultaneously, and grid also is connected with chip CS.The output of TV2 need access inductance L 1, plays a protective role.To become frequency from the 1kV direct current of pulsed flow straightener input after the boosting of the vibration four IGBT and TV2 is 75kHz, and voltage is the high voltagehigh frequency electricity of 8kV.
Description of drawings
Fig. 1: high-frequency and high-voltage generator structured flowchart described in the utility model;
Fig. 2: high voltagehigh frequency generator schematic diagram.
In Fig. 2, RU, PCS and RCT+T are respectively the circuit diagrams of rectifying device, pulsed flow straightener and resonant mode current inverter+transformer, and in figure, the specifications parameter of each device is as shown in table 1.
Embodiment
Embodiment 1:
Table 1: each components and parts performance index and parameter in high voltagehigh frequency generator described in the utility model:
The working method of generator is: at first rectifier is converted to the 300V direct current with input AC electricity (220V, 50Hz).Change over switch switches on power.Input filter can be avoided the noise effect equipment operation in electrical network, and the noise that also can avoid producing in equipment simultaneously enters in electrical network.Protective circuit can avoid rectifier overload (electric current is too high, overtension or short circuit) to occur.Smoothing filter can avoid voltage fluctuation to occur, surpasses set point.
The pulsed flow straightener can guarantee to pass into from generator the stability of the electric current of load.Its major part is power inverter, and the control of its controlled circuit passes into given energy in the flat wave filter of output.Electric current just can be determined the energy size by transducer after feedback circuit is passed into control circuit.
The resonance current inverter will become the 1kV direct current of pulsed flow straightener output the high-frequency alternating current of 75kHz.Its foundation structure is a bridge-type controlled resonant converter.Control circuit connects given switch the frequency that disconnects, and realizes the control to converter.The inductance of output transformer and the electric capacity of load will form a series connection oscillating circuit with special resonance frequency.The selection of output transformer and electrode system need guarantee that the frequency of this oscillating circuit is close with the frequency that control system is the setting of bridge-type controlled resonant converter switch.Like this, the fractional load electric current will be sinusoidal form.
Finally, can obtain frequency after the high-frequency alternating current of acquisition boosts via step-up transformer is 75kHz, and voltage reaches as high as the high voltagehigh frequency electricity of 8kV.
For the heating dielectric material, frequency need reach 10～100kHz.Under high-frequency, the mode of resonance of output translator can guarantee high bearing power.
In material heating process, dielectric loss and resistance loss all can increase along with the rising of temperature.Due to the effect of pulsed flow straightener, it is stable that the electric current in load will keep, thereby guarantee in different heating intervals that all an available generator heats.
Embodiment 2:
1. select a length of side to be about 40cm, the oil shale sample of high approximately 20cm carries out Heating Experiment as object;
2. the form of electrode antenna field is square, beats respectively active well 1 on four angles, and well depth runs through the oil shale sample, then insert diameter and be about 1cm, be about the cylindrical, copper electrode for 30cm, the length of side of square is 15cm, with connecting with the high-tension cable same pole phase between lateral electrode;
3. utilize high-tension cable that electrode is connected with the high voltagehigh frequency power supply;
4. pass into 8kv in electrode, the alternating voltage of 75kHz;
5. after heating 2 hours, the temperature of thermocouple measurement electrode zone line reaches 300 ° of C.
Claims (1)
1. high-frequency and high-voltage generator is used in a dielectric material heating, it is characterized in that: rectifying device, pulsed flow straightener, three parts of resonant mode current inverter, consist of;
Rectifying device is comprised of VD1, VD2, VD3, four diodes of VD4 and C1, two electric capacity of C2, the anode of VD1 is connected with the negative electrode of VD3, the anode of VD2 is connected with the negative electrode of VD4, the negative electrode of VD1 is connected with the negative electrode of VD2, then be connected with the capacitor C1 of parallel connection and the end of C2, the anode of VD3 anode and VD4 is connected, and then with the capacitor C 1 of parallel connection and the other end of C2, is connected; The anode of the live wire access VD1 of input power, the anode of zero line access VD2, between the negative electrode of VD2 and VD4 anode, output voltage is the direct current of 300V; Capacitor C1 and C2 will further filter out the burr in the diode output signal, thus the more level and smooth 300V direct current of output;
The pulsed flow straightener is by VD5, VD6, three diodes of VD7, transformer TV1, and triode VT1, capacitor C 3, current transformer TA1 and chip CS form; The negative electrode of diode VD6 is connected with the negative electrode of VD7, and then both anodes are connected with two inputs of transformer TV1 respectively, plays the effect of protection transformer; The collector electrode of triode VT1 is connected with the anode of diode VD6, grounded emitter, and base stage is connected with chip CS; Voltage will become the alternating current of 1kV after transformer TV1; The anode of diode VD5 is connected with the output of transformer TV1, and the negative electrode of diode VD5 is connected with an end of capacitor C 3, and the other end of capacitor C3 is connected with another output of transformer TV1; The 1kV alternating current of TV1 output will become the 1kV direct current after the rectification of VD5 and C3 and filter action; Be connected with the end of current transformer TA1 after one end of the negative electrode of diode VD5 and capacitor C 3 is connected, simultaneously, the two ends of TA1 are connected with chip CS again, play the output voltage feedback, and then control the effect that triode VT1 closes or opens; Therefore, the pulsed flow straightener will be exported the 1kV direct current finally;
The resonant mode current inverter is comprised of VT2, VT3, VT4, four IGBT of VT5, transformer TV2, inductance L 1 and chip CS; The emitter of VT2 is connected with the collector electrode of input of TV2 and VT4 simultaneously, and its collector electrode is connected with the live wire of from the pulsed flow straightener, drawing, and grid is connected with chip CS; The collector electrode of VT3 also is connected with live wire, and emitter is connected with the collector electrode of VT5 and another input of TV2 simultaneously, and grid is connected with chip CS; The emitter of VT4 and VT5 is connected with the zero line of from the pulsed flow straightener, drawing simultaneously, and grid also is connected with chip CS; The output of TV2 need access inductance L 1, plays a protective role; To become frequency from the 1kV direct current of pulsed flow straightener input after the boosting of the vibration four IGBT and TV2 is 75kHz, and voltage is the high voltagehigh frequency electricity of 8kV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203658220U CN203289332U (en) | 2013-06-24 | 2013-06-24 | High-frequency high-voltage generator for heating dielectric material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013203658220U CN203289332U (en) | 2013-06-24 | 2013-06-24 | High-frequency high-voltage generator for heating dielectric material |
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| CN203289332U true CN203289332U (en) | 2013-11-13 |
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| CN2013203658220U Withdrawn - After Issue CN203289332U (en) | 2013-06-24 | 2013-06-24 | High-frequency high-voltage generator for heating dielectric material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326591A (en) * | 2013-06-24 | 2013-09-25 | 吉林大学 | High-frequency high-voltage generator used for heating dielectric materials |
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2013
- 2013-06-24 CN CN2013203658220U patent/CN203289332U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326591A (en) * | 2013-06-24 | 2013-09-25 | 吉林大学 | High-frequency high-voltage generator used for heating dielectric materials |
| CN103326591B (en) * | 2013-06-24 | 2015-05-20 | 吉林大学 | High-frequency high-voltage generator used for heating dielectric materials |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131113 Effective date of abandoning: 20150520 |
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| RGAV | Abandon patent right to avoid regrant |