CN219717930U - High-voltage charging power supply capable of outputting positive and negative polarities - Google Patents
High-voltage charging power supply capable of outputting positive and negative polarities Download PDFInfo
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- CN219717930U CN219717930U CN202321309678.9U CN202321309678U CN219717930U CN 219717930 U CN219717930 U CN 219717930U CN 202321309678 U CN202321309678 U CN 202321309678U CN 219717930 U CN219717930 U CN 219717930U
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Abstract
The utility model relates to the technical field of charging power supplies, in particular to a high-voltage charging power supply capable of outputting positive and negative polarities, which comprises a positive voltage output circuit and a negative voltage output circuit; the positive voltage output circuit comprises a first rectifying circuit and a first transformer which are sequentially connected in series, wherein the input voltage outputs positive voltage after passing through the first rectifying circuit, and then outputs positive high voltage after being boosted by the first transformer; the negative voltage output circuit comprises a second rectifying circuit and a second transformer which are sequentially connected in series, wherein the input voltage outputs negative voltage after passing through the second rectifying circuit, and then outputs negative high voltage after being boosted by the second transformer. The positive voltage output circuit and the negative voltage output circuit respectively output positive high voltage and negative high voltage to charge the two capacitors, so that the positive pulse high voltage capacitor and the negative pulse high voltage capacitor can be charged simultaneously, the charging power supply structure is simplified, the charging efficiency is improved, and the charging time is greatly saved.
Description
Technical Field
The utility model relates to the technical field of charging power supplies, in particular to a high-voltage charging power supply capable of outputting positive and negative polarities.
Background
The pulse power technology is used as an emerging scientific technology and is widely applied in the fields of industry, medical treatment, military, high-energy physics, high-energy laser, environmental protection, energy conservation and the like. The pulse power technology has the main principle that a pulse capacitor is firstly charged slowly and then rapidly discharged in a short time, so that high-voltage high-power short pulses are generated. The high-voltage charging power supply is taken as an important component of the pulse power system, and the charging voltage, the charging rate and the charging maintenance performance of the high-voltage charging power supply all meet the charging requirement of the system on the high-voltage pulse capacitor.
The existing charging modes are divided into constant voltage charging and constant current charging, and the constant voltage charging mode has low charging efficiency (less than 50%), so that the constant current charging mode is adopted at present. The constant-current charging mode improves the charging efficiency, but the existing high-voltage charging power supply cannot output charging voltages with positive and negative polarities, so that the charging efficiency is low; on the other hand, when the load is short-circuited, the power supply can be directly burnt out without any protection function.
Disclosure of Invention
The utility model aims to solve the technical problem that the output of the high-voltage transformer is uncontrollable in the constant-current charging mode.
The utility model provides a high-voltage charging power supply capable of outputting positive and negative polarities, which comprises a positive voltage output circuit and a negative voltage output circuit;
the positive voltage output circuit comprises a first rectifying circuit and a first transformer which are sequentially connected in series, wherein the input voltage outputs positive voltage after passing through the first rectifying circuit, and then outputs positive high voltage after being boosted by the first transformer;
the negative voltage output circuit comprises a second rectifying circuit and a second transformer which are sequentially connected in series, wherein the input voltage passes through the second rectifying circuit and then outputs negative voltage, and then the input voltage is boosted through the second transformer and then outputs negative high voltage.
Preferably, the output end of the first rectifying circuit and the output end of the second rectifying circuit are respectively connected in series with an LC series resonant circuit.
Preferably, the LC series resonant circuit includes a series resonant inductance and a series resonant capacitance.
Preferably, the first rectifying circuit comprises two groups of power switching devices connected in parallel, each group of power switching devices comprising two power switching devices connected in parallel;
the second rectifying circuit includes two sets of power switching devices connected in parallel, each set of power switching devices including two power switching devices connected in parallel.
Preferably, the high-voltage charging power supply further includes a core controller PPEC that can output a PWM waveform for controlling on or off of each of the power switching devices.
Preferably, the power switching device is an IGBT or MOS transistor.
Preferably, the high-voltage charging power supply further comprises a positive voltage doubling circuit and a negative voltage doubling circuit, wherein the positive voltage doubling circuit is used for doubling the voltage after the first transformer is used for boosting the voltage, and finally positive voltage is output to charge the positive pulse high-voltage capacitor +V0;
and after being boosted by the second transformer, the voltage is multiplied by a negative voltage doubling circuit, and finally negative voltage is output to charge the positive pulse high-voltage capacitor-V0.
Preferably, the positive voltage doubling circuit and the negative voltage doubling circuit are both voltage doubling circuits with the same structure, and the voltage doubling circuits comprise rectifying and boosting circuits formed by a plurality of capacitors and a plurality of diodes.
Preferably, the voltage doubling circuit further comprises a current limiting resistor group formed by connecting a plurality of resistors in series, and the current limiting resistor group is connected between the rectifying and boosting circuit and the negative electrode of the output voltage of the transformer in series.
The beneficial effects are that: the utility model provides a high-voltage charging power supply capable of outputting positive and negative polarities, which comprises a positive voltage output circuit and a negative voltage output circuit; the positive voltage output circuit comprises a first rectifying circuit and a first transformer which are sequentially connected in series, wherein the input voltage outputs positive voltage after passing through the first rectifying circuit, and then outputs positive high voltage after being boosted by the first transformer; the negative voltage output circuit comprises a second rectifying circuit and a second transformer which are sequentially connected in series, wherein the input voltage outputs negative voltage after passing through the second rectifying circuit, and then outputs negative high voltage after being boosted by the second transformer. The positive voltage output circuit and the negative voltage output circuit respectively output positive high voltage and negative high voltage to charge the two capacitors, so that the positive pulse high voltage capacitor and the negative pulse high voltage capacitor can be charged simultaneously, the charging power supply structure is simplified, the charging efficiency is improved, and the charging time is greatly saved.
The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and the accompanying drawings. Specific embodiments of the present utility model are given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
FIG. 1 is a diagram of a high voltage charging power supply circuit capable of outputting positive and negative polarities;
fig. 2 is a block diagram of a voltage doubling circuit provided by the utility model.
Detailed Description
The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model. The utility model is more particularly described by way of example in the following paragraphs with reference to the drawings. Advantages and features of the utility model will become more apparent from the following description and from the claims. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the utility model.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in FIG. 1, the utility model provides a high-voltage charging power supply capable of outputting positive and negative polarities, which comprises a positive voltage output circuit and a negative voltage output circuit; the positive voltage output circuit comprises a first rectifying circuit and a first transformer which are sequentially connected in series, wherein the input voltage outputs positive voltage after passing through the first rectifying circuit, and then outputs positive high voltage after being boosted by the first transformer; the negative voltage output circuit comprises a second rectifying circuit and a second transformer which are sequentially connected in series, wherein the input voltage outputs negative voltage after passing through the second rectifying circuit, and then outputs negative high voltage after being boosted by the second transformer. The positive voltage output circuit and the negative voltage output circuit respectively output positive high voltage and negative high voltage to charge the two capacitors, so that the positive pulse high voltage capacitor and the negative pulse high voltage capacitor can be charged simultaneously, the charging power supply structure is simplified, the charging efficiency is improved, and the charging time is greatly saved.
The first transformer and the second transformer are respectively a transformer T1 and a transformer T2 in fig. 1, and are respectively used for amplifying a positive voltage and a negative voltage.
The first rectifying circuit comprises two groups of power switching devices connected in parallel, and each group of power switching devices comprises two power switching devices connected in parallel; the second rectifying circuit includes two sets of power switching devices connected in parallel, each set of power switching devices including two power switching devices connected in parallel. As shown in fig. 1, the first rectifying circuit includes power switching devices Q1 to Q4; the second rectifying circuit includes power switching devices Q5 to Q8.
At present, a constant current charging mode is mostly adopted. The constant-current charging mode improves the charging efficiency, but the problem that the transformer is large in size and the whole device is large due to low switching frequency still exists. Most of the existing high-voltage charging power supplies are fixed and not adjustable in parameters, repeated development is needed in different application scenes, and time and labor are consumed. Therefore, a high-frequency and controllable-output high-voltage charging power supply needs to be researched to meet the charging requirements of pulse power systems in various application scenes.
Thus, a preferred embodiment, the high-voltage charging power supply includes a core controller PPEC that can output a PWM waveform for controlling on or off of each of the power switching devices. The core controller adopts the modularized design, and mainly comprises a power supply module, a sampling module, a PWM output module, a PPEC control module, a display module and a protection module. The sampling module collects input/output parameter values of the power conversion circuit and transmits data to the PPEC control module. The PPEC control module performs PWM control on each power switching device Q1-Q8 of the positive voltage output circuit and the negative voltage output circuit according to the set charging parameters, the PWM waveform is written in PPEC in advance, the PWM waveform can be automatically sent out just by directly opening the PPEC during use, and the PWM waveform controls the on or off of the Q1-Q8 so as to realize the simultaneous occurrence of positive voltage output and negative voltage output and charge two capacitors.
And the output can be regulated and controlled in a closed loop according to the parameters uploaded by the sampling circuit, so that stable output is achieved. The core controller can perform voltage holding control after capacitor charging is completed. And can set charging voltage, charging current, charging slope and charging time through the screen of the core controller.
In one particular implementation, the input voltage is passed through an input filter capacitor C in And accessing an LC series resonant circuit. The LC series resonant circuit mainly comprises a resonant inductance L r1 /L r2 Resonance capacitor C b1 /C b2 The two rectifiers comprise power switching devices Q1-Q8, and an alternating current-direct current conversion process is achieved by controlling the on-off of the power switching devices. The power switching devices Q1-Q4 form a first rectifying circuit, the power switches Q5-Q8 form a second rectifying circuit, and the two rectifying circuits are respectively connected with an LC series resonant circuit and then are respectively boosted through the transformer T1 and the transformer T2.
In a preferred scheme, the high-voltage charging power supply further comprises two voltage doubling circuits, namely a positive voltage doubling circuit and a negative voltage doubling circuit, which respectively correspond to the voltage doubling sum (positive) and the voltage doubling sum (negative) in fig. 1. The circuit design structure of the positive voltage doubling circuit and the circuit design structure of the negative voltage doubling circuit are the same, and the functions are the same. Only positive and negative voltages are amplified from the first and second transformers, respectively.
After being boosted by a transformer T1, the voltage is multiplied by voltage multiplication and (positive) voltage multiplication, and finally positive voltage is output to charge a positive pulse high-voltage capacitor +V0; after being boosted by the transformer T2, the voltage is multiplied by the voltage multiplication sum (negative), and finally negative voltage is output to charge the positive pulse high-voltage capacitor-V0.
Then, the direct current is boosted by a high frequency transformer and a voltage doubling circuit (voltage doubling sum), and the high voltage is output to a high voltage capacitive load. The power switching devices Q1-Q8 are all electronic devices such as IGBT (insulated gate bipolar transistor) or MOS (metal oxide semiconductor) tubes and the like which can be controlled to be switched on or off.
In addition, the high-voltage charging power supply can generate output voltages with positive and negative polarities and can be controlled independently through two discrete units, and can charge the positive pulse high-voltage capacitor and the negative pulse high-voltage capacitor at the same time, and can charge only a single type of pulse capacitor through the core controller.
In a preferred embodiment, the voltage doubler circuit is designed as shown in fig. 2, and the voltage U1 output from the transformer is passed through the voltage doubler circuit to output the voltage U2. The voltage doubling circuit is composed of capacitors C1-C10, diodes D1-D10 and current limiting resistors R1-R7, and can achieve ten times of boosting output of input voltage. The capacitors C1-C10 and the diodes D1-D10 are mainly used for rectifying and boosting the voltage output from the transformer, and the rectifying and boosting circuit is finally obtained through the serial-parallel connection of the capacitors C1-C10 and the diodes D1-D10. The voltage dividing resistors R1 and R7 also play a role in preventing impact when the load is short-circuited.
The beneficial effects are that:
1. the high-voltage charging power supply adopts a soft switching technology, reduces switching loss and switching noise, effectively improves the switching frequency of a circuit, adopts a high-frequency transformer and selects a filter with smaller parameters, and effectively reduces the volume and weight of the device.
2. This high voltage charging source accessible core controller realizes charge voltage, charge current, charge slope and charging time's regulation, can set up suitable charge parameter according to practical application scene, and the commonality is good.
3. The voltage doubling circuit of the high-voltage charging power supply is provided with the voltage dividing resistor, and the voltage dividing resistor plays a role in preventing impact when a load is short-circuited.
4. The high-voltage charging power supply can output charging voltages with positive and negative polarities, and can charge the positive pulse high-voltage capacitor and the negative pulse high-voltage capacitor at the same time, and can charge only a single type of pulse capacitor through the core controller.
The above description is only of the preferred embodiments of the present utility model, and is not intended to limit the present utility model in any way; those skilled in the art will readily appreciate that the present utility model may be implemented as shown in the drawings and described above; however, those skilled in the art will appreciate that many modifications, adaptations, and variations of the present utility model are possible in light of the above teachings without departing from the scope of the utility model; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present utility model still fall within the scope of the present utility model.
Claims (9)
1. The high-voltage charging power supply capable of outputting positive and negative polarities is characterized by comprising a positive voltage output circuit and a negative voltage output circuit;
the positive voltage output circuit comprises a first rectifying circuit and a first transformer which are sequentially connected in series, wherein the input voltage outputs positive voltage after passing through the first rectifying circuit, and then outputs positive high voltage after being boosted by the first transformer;
the negative voltage output circuit comprises a second rectifying circuit and a second transformer which are sequentially connected in series, wherein the input voltage passes through the second rectifying circuit and then outputs negative voltage, and then the input voltage is boosted through the second transformer and then outputs negative high voltage.
2. The high-voltage charging power supply according to claim 1, wherein the output terminal of the first rectifying circuit and the output terminal of the second rectifying circuit are respectively connected in series with an LC series resonant circuit.
3. The high-voltage charging power supply of claim 2, wherein the LC series resonant circuit comprises a series resonant inductor and a series resonant capacitor.
4. The high-voltage charging power supply capable of outputting both positive and negative polarities according to claim 1, wherein the first rectifying circuit comprises two groups of power switching devices connected in parallel, each group of power switching devices comprising two power switching devices connected in parallel;
the second rectifying circuit includes two sets of power switching devices connected in parallel, each set of power switching devices including two power switching devices connected in parallel.
5. The high-voltage charging power supply according to claim 4, further comprising a core controller PPEC that outputs a PWM waveform for controlling on or off of each of the power switching devices.
6. The high-voltage charging power supply capable of outputting positive and negative polarities according to claim 4, wherein the power switching device is an IGBT or a MOS transistor.
7. The high-voltage charging power supply capable of outputting positive and negative polarities according to claim 1, wherein the high-voltage charging power supply further comprises a positive voltage doubling circuit and a negative voltage doubling circuit, wherein the positive voltage doubling circuit is used for doubling voltage after the first transformer is used for boosting voltage, and finally positive voltage is output to charge the positive pulse high-voltage capacitor +v0;
and after being boosted by the second transformer, the voltage is multiplied by a negative voltage doubling circuit, and finally negative voltage is output to charge the positive pulse high-voltage capacitor-V0.
8. The high-voltage charging power supply according to claim 7, wherein the positive voltage doubling circuit and the negative voltage doubling circuit are both voltage doubling circuits with the same structure, and the voltage doubling circuits comprise rectifying and boosting circuits composed of a plurality of capacitors and a plurality of diodes.
9. The high-voltage charging power supply capable of outputting positive and negative polarities according to claim 8, wherein the voltage doubling circuit further comprises a current limiting resistor group formed by connecting a plurality of resistors in series, and the current limiting resistor group is connected between the rectifying and boosting circuit and the negative electrode of the output voltage of the transformer in series.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321309678.9U CN219717930U (en) | 2023-05-27 | 2023-05-27 | High-voltage charging power supply capable of outputting positive and negative polarities |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321309678.9U CN219717930U (en) | 2023-05-27 | 2023-05-27 | High-voltage charging power supply capable of outputting positive and negative polarities |
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| CN219717930U true CN219717930U (en) | 2023-09-19 |
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| CN202321309678.9U Active CN219717930U (en) | 2023-05-27 | 2023-05-27 | High-voltage charging power supply capable of outputting positive and negative polarities |
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