CN117040294A - Improved voltage doubling circuit - Google Patents
Improved voltage doubling circuit Download PDFInfo
- Publication number
- CN117040294A CN117040294A CN202310866029.7A CN202310866029A CN117040294A CN 117040294 A CN117040294 A CN 117040294A CN 202310866029 A CN202310866029 A CN 202310866029A CN 117040294 A CN117040294 A CN 117040294A
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- voltage doubling
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- 238000004804 winding Methods 0.000 claims abstract description 36
- 239000003990 capacitor Substances 0.000 claims description 49
- 230000003071 parasitic effect Effects 0.000 abstract description 7
- 230000004044 response Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M7/10—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode arranged for operation in series, e.g. for multiplication of voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The application provides an improved voltage doubling circuit, which comprises a bipolar voltage doubling unit, wherein the bipolar voltage doubling unit comprises: a winding; the odd-level voltage doubling units and the even-level voltage doubling units are arranged in parallel relative to the windings, and the polarities of diodes at the positions corresponding to the even-level voltage doubling units are opposite to those of diodes at the positions corresponding to the odd-level voltage doubling units. Parasitic parameters of the high-voltage transformer are reduced through dispersing secondary windings of the transformer; the output ripple wave is reduced by the voltage doubling units with two phases which are led out by a group of windings and have 180 degrees of phase difference, and the voltage doubling stage number led out by a single winding is not more than 2, so that low voltage drop and high response speed can be realized.
Description
Technical Field
The application relates to the technical field of radar power supplies, in particular to an improved voltage doubling circuit.
Background
With the continuous increase of the voltage level required by the electric vacuum device, a high-voltage switching power supply with a higher voltage level is required to be matched with the electric vacuum device, and the higher voltage output can be realized through two ways at present: one is to directly increase the turn ratio of the high-voltage transformer, and obtain the required cathode high voltage by means of the ultrahigh turn ratio; the other is to increase the number of basic voltage doubling units based on the original high-voltage transformer to obtain the required cathode high voltage.
The high-voltage transformer directly increases the turn ratio, and generates very large parasitic parameters such as leakage inductance and parasitic capacitance, and excessive peak voltage caused by the parasitic parameters can cause strong electromagnetic interference problems, and even damage a semiconductor switching device in extreme cases; in addition, with the increase of the turn ratio, the volume and the weight of the transformer are multiplied, and higher requirements are put on the insulation and the heat dissipation of the transformer, so that the design difficulty of the transformer is increased, and the development trend of miniaturization of a high-voltage power supply is overcome.
The scheme of cascading the high-voltage transformer and the voltage doubling units is common in the industry at present, and the voltage doubling units with double functions of voltage doubling and rectification are connected to the secondary side of the original high-voltage transformer, so that the design difficulty of the high-voltage transformer can be reduced to a great extent, and the electric stress of a conventional rectifying device can be relieved. However, with an increasing number of voltage doubling units, the voltage drop and ripple problems become very pronounced in case of load.
Disclosure of Invention
In view of this, the embodiments of the present disclosure provide an improved voltage doubler circuit, which reduces output voltage drop, reduces output ripple, and increases response speed.
The embodiment of the specification provides the following technical scheme: an improved voltage doubling circuit comprises a bipolar voltage doubling unit, wherein the bipolar voltage doubling unit comprises: a winding; the odd-level voltage doubling units and the even-level voltage doubling units are arranged in parallel relative to the windings, and the polarities of diodes at the positions corresponding to the even-level voltage doubling units are opposite to those of diodes at the positions corresponding to the odd-level voltage doubling units.
Further, the odd-stage voltage doubling unit includes: one end of the odd-level first capacitor is connected with one end of the winding; the anode end of the first diode of the odd-numbered stage is connected with the other end of the winding, and the cathode end of the first diode of the odd-numbered stage is connected with the other end of the first capacitor of the odd-numbered stage; the anode end of the odd-level second diode is connected with the other end of the odd-level first capacitor; and two ends of the odd-level second capacitor are respectively connected with the anode end of the odd-level first diode and the cathode end of the odd-level second diode.
Further, the even-numbered stage voltage doubling unit includes: one end of the even-numbered stage first capacitor is connected with one end of the winding; the anode end of the first diode of the even number stage is connected with the other end of the first capacitor of the even number stage; the cathode end of the even-numbered stage second diode is connected with the other end of the even-numbered stage first capacitor; and the two ends of the even-numbered stage second capacitor are respectively connected with the cathode end of the even-numbered stage first diode and the anode end of the even-numbered stage second diode, and the odd-numbered stage second capacitor is connected with the even-numbered stage second capacitor in series.
Further, the bipolar voltage doubling units are multiple, and the bipolar voltage doubling units are sequentially connected in series.
Further, the two adjacent bipolar voltage doubling units comprise a front bipolar voltage doubling unit and a rear bipolar voltage doubling unit, wherein the even-numbered stage second capacitors in the front bipolar voltage doubling unit are connected in series with the odd-numbered stage second capacitors in the rear bipolar voltage doubling unit.
Compared with the prior art, the beneficial effects that above-mentioned at least one technical scheme that this description embodiment adopted can reach include at least: parasitic parameters of the high-voltage transformer are reduced through dispersing secondary windings of the transformer; the output ripple wave is reduced by the voltage doubling units with two phases which are led out by a group of windings and have 180 degrees of phase difference, and the voltage doubling stage number led out by a single winding is not more than 2, so that low voltage drop and high response speed can be realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of an embodiment of the present application.
Detailed Description
Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1, an embodiment of the present application provides an improved voltage doubler circuit, including a bipolar voltage doubler unit, where the bipolar voltage doubler unit includes: winding 10, odd stage voltage doubling unit 20 and even stage voltage doubling unit 30. The odd-stage voltage doubling units 20 and the even-stage voltage doubling units 30 are arranged in parallel relative to the windings 10, and the polarities of the diodes at the positions corresponding to the even-stage voltage doubling units 30 are opposite to those of the diodes at the positions corresponding to the odd-stage voltage doubling units 20.
Parasitic parameters of the high-voltage transformer are reduced through dispersing secondary windings of the transformer; the output ripple wave is reduced by the voltage doubling units with two phases which are led out by a group of windings and have 180 degrees of phase difference, and the voltage doubling stage number led out by a single winding is not more than 2, so that low voltage drop and high response speed can be realized.
Specifically, the odd-stage voltage doubler unit 20 includes:
an odd-numbered stage first capacitor 21, one end of which is connected with one end of the winding 10;
the anode end of the odd-numbered stage first diode 22 is connected with the other end of the winding 10, and the cathode end of the odd-numbered stage first diode 22 is connected with the other end of the odd-numbered stage first capacitor 21;
the anode end of the odd-level second diode 23 is connected with the other end of the odd-level first capacitor 21;
and two ends of the odd-stage second capacitor 24 are respectively connected with the anode end of the odd-stage first diode 22 and the cathode end of the odd-stage second diode 23.
Further, the even-stage voltage doubling unit 30 includes:
one end of the even-numbered stage first capacitor 31 is connected with one end of the winding 10;
an even-numbered stage first diode 32, the cathode terminal of which is connected to the other end of the winding 10, and the anode terminal of the even-numbered stage first diode 32 is connected to the other end of the even-numbered stage first capacitor 31;
an even-numbered stage second diode 33, the cathode terminal of the even-numbered stage second diode 33 being connected to the other terminal of the even-numbered stage first capacitor 31;
the two ends of the even-numbered stage second capacitor 34 are respectively connected with the cathode end of the even-numbered stage first diode 32 and the anode end of the even-numbered stage second diode 33, and the odd-numbered stage second capacitor 24 is connected in series with the even-numbered stage second capacitor 34.
Preferably, the bipolar voltage doubling units are multiple, and the multiple bipolar voltage doubling units are sequentially connected in series.
The voltage doubling units led out by the n windings are connected in series, so that the required high voltage can be obtained, parasitic parameters can be reduced, integral ripple wave is reduced, integral voltage drop is reduced, and response speed is accelerated. Is very suitable for supplying power to the electric vacuum device with higher voltage level.
It should be noted that the primary side of the high-voltage transformer has 1 winding, the negative side has n windings, and the transformation ratio of each negative side winding and the primary side winding is not more than 10.
The adjacent two bipolar voltage doubling units comprise a front bipolar voltage doubling unit and a rear bipolar voltage doubling unit, wherein the even-numbered stage second capacitors 34 in the front bipolar voltage doubling unit are connected in series with the odd-numbered stage second capacitors 24 in the rear bipolar voltage doubling unit. The capacitors of even subscripts are sequentially connected, the capacitor of the even subscript with the smallest subscript is connected to the ground end of the load, and the capacitor of the even subscript with the largest subscript is connected to the high voltage end of the load.
Because the structural forms of the voltage doubling units of all odd stages are the same, the structural forms of the voltage doubling units of all even stages are the same, and the working principles of the voltage doubling units of the odd stages and the voltage doubling units of the even stages are described below by taking the first stage as an example.
The working process of the odd-level voltage doubling unit comprises the following steps: assuming that the working frequency of the transformer is f, the peak voltage of the secondary is Vsp, when the secondary voltage of the transformer is positive and negative, the first diode 22 of the odd-numbered stage is conducted, the second diode 23 of the odd-numbered stage is cut off, the secondary winding charges the first capacitor 21 of the odd-numbered stage through the first diode 22 of the odd-numbered stage, the voltage is Vsp, and the voltage polarity is positive and negative; when the polarity of the secondary voltage of the transformer is changed into positive upper and negative lower, the first diode 22 of the odd-numbered stage is cut off, the second diode 23 of the odd-numbered stage is cut on, the secondary voltage of the transformer and the first capacitor 21 of the odd-numbered stage are charged to jointly charge the second capacitor 24 of the odd-numbered stage, the voltage is 2Vsp, and the polarity of the voltage is positive right and negative left;
the working process of the even-number-stage voltage doubling unit comprises the following steps: assuming that the working frequency of the transformer is f, the peak voltage of the secondary is Vsp, when the voltage of the secondary of the transformer is positive and negative, the even-numbered stage first diode 32 is conducted, the even-numbered stage second diode 33 is cut off, the secondary winding charges the capacitor even-numbered stage first capacitor 31 through the even-numbered stage first diode 32, the voltage is Vsp, and the voltage polarity is positive and negative; when the polarity of the secondary voltage of the transformer is changed to be lower positive and upper negative, the first diode 32 of the even number stage is turned off, the second diode 33 of the even number stage is turned on, the secondary voltage of the transformer and the first capacitor 31 of the even number stage are combined to charge the second capacitor 34 of the even number stage, the voltage is 2Vsp, and the polarity of the voltage is left positive and right negative.
The odd-numbered stage second capacitor 24 and the even-numbered stage second capacitor 34 are connected in series to obtain an output voltage of 4Vsp, and the even-numbered subscript capacitors in the n secondary windings are connected in series in sequence to obtain an output voltage of 4 nVsp.
The foregoing description of the embodiments of the application is not intended to limit the scope of the application, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the application shall fall within the scope of the patent. In addition, the technical characteristics and technical scheme, technical characteristics and technical scheme can be freely combined for use.
Claims (5)
1. An improved voltage doubling circuit comprises a bipolar voltage doubling unit, and is characterized in that the bipolar voltage doubling unit comprises:
a winding (10);
the odd-level voltage doubling units (20) and the even-level voltage doubling units (30), the odd-level voltage doubling units (20) and the even-level voltage doubling units (30) are arranged in parallel relative to the winding (10), and the polarities of diodes at the positions corresponding to the even-level voltage doubling units (30) are opposite to those of diodes at the positions corresponding to the odd-level voltage doubling units (20).
2. The improved voltage doubling circuit of claim 1, wherein the odd stage voltage doubling unit (20) comprises:
an odd-level first capacitor (21), one end of which is connected with one end of the winding (10);
the anode end of the odd-level first diode (22) is connected with the other end of the winding (10), and the cathode end of the odd-level first diode (22) is connected with the other end of the odd-level first capacitor (21);
the anode end of the odd-level second diode (23) is connected with the other end of the odd-level first capacitor (21);
and two ends of the odd-level second capacitor (24) are respectively connected with the anode end of the odd-level first diode (22) and the cathode end of the odd-level second diode (23).
3. The improved voltage doubling circuit according to claim 2, wherein the even stage voltage doubling unit (30) comprises:
an even number stage first capacitor (31) one end of which is connected with one end of the winding (10);
the anode end of the even-numbered stage first diode (32) is connected with the other end of the winding (10), and the anode end of the even-numbered stage first diode (32) is connected with the other end of the even-numbered stage first capacitor (31);
the cathode end of the even-numbered stage second diode (33) is connected with the other end of the even-numbered stage first capacitor (31);
and the two ends of the even-number-stage second capacitor (34) are respectively connected with the cathode end of the even-number-stage first diode (32) and the anode end of the even-number-stage second diode (33), and the odd-number-stage second capacitor (24) is connected with the even-number-stage second capacitor (34) in series.
4. The improved voltage doubling circuit according to claim 3, wherein the bipolar voltage doubling units are plural, and the plural bipolar voltage doubling units are sequentially connected in series.
5. The improved voltage doubling circuit of claim 4 wherein two adjacent bipolar voltage doubling cells comprise a preceding bipolar voltage doubling cell and a following bipolar voltage doubling cell, wherein an even stage second capacitor (34) in the preceding bipolar voltage doubling cell is in series with an odd stage second capacitor (24) in the following bipolar voltage doubling cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310866029.7A CN117040294A (en) | 2023-07-13 | 2023-07-13 | Improved voltage doubling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310866029.7A CN117040294A (en) | 2023-07-13 | 2023-07-13 | Improved voltage doubling circuit |
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| Publication Number | Publication Date |
|---|---|
| CN117040294A true CN117040294A (en) | 2023-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310866029.7A Pending CN117040294A (en) | 2023-07-13 | 2023-07-13 | Improved voltage doubling circuit |
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| Country | Link |
|---|---|
| CN (1) | CN117040294A (en) |
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2023
- 2023-07-13 CN CN202310866029.7A patent/CN117040294A/en active Pending
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