CN220775655U - Capacitor charging low ripple voltage stabilizing output circuit - Google Patents
Capacitor charging low ripple voltage stabilizing output circuit Download PDFInfo
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- CN220775655U CN220775655U CN202322374650.XU CN202322374650U CN220775655U CN 220775655 U CN220775655 U CN 220775655U CN 202322374650 U CN202322374650 U CN 202322374650U CN 220775655 U CN220775655 U CN 220775655U
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Abstract
The utility model discloses a capacitor charging low ripple voltage stabilizing output circuit, which belongs to the technical field of output circuits and comprises: a capacitor; the hysteresis charging circuit is electrically connected with the capacitor and is used for generating certain hysteresis voltage to charge the capacitor, the low-ripple voltage stabilization is output after the characteristic of almost zero ripple of self-discharge of the capacitor is overlapped with the low-ripple output characteristic of the small-voltage auxiliary voltage stabilization output circuit, and the auxiliary voltage stabilization output circuit, the hysteresis charging circuit and the voltage feedback circuit are matched, so that voltage drop of the capacitor is compensated, on one hand, the output voltage is kept stable, and on the other hand, the auxiliary voltage stabilization output circuit adopts small-voltage power supply, ripple is small, output is easy to control, the voltage which is finally output keeps low-ripple voltage stabilization output, and a discharging circuit or other control circuits matched with the capacitor generate small interference.
Description
Technical Field
The utility model belongs to the technical field of output circuits, and particularly relates to a capacitor charging low-ripple voltage stabilizing output circuit.
Background
At present, more and more switches of an eddy current repulsive force mechanism in the field of power equipment are used, the opening and closing speed is made to be faster and faster, wherein the current requirement of a discharging coil for the repulsive force mechanism is larger and larger, and the discharging voltage is also improved, so that the higher and higher requirement is provided for a direct current charging power supply, in order to enable the direct current charging power supply to output stable voltage and smaller ripple waves, a plurality of filter inductors and capacitors are added on the power supply output by a traditional method, but because the output voltage is higher (DC 500V-DC 2000V), the absolute quantity of the ripple waves is larger when the power supply works, and larger interference is generated for a discharging circuit or other control circuits matched with the power supply.
Disclosure of Invention
The utility model provides a capacitor charging low-ripple voltage stabilizing output circuit to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions: a capacitive charge low ripple voltage regulated output circuit, comprising: a capacitor; the hysteresis charging circuit is electrically connected with the capacitor and is used for generating certain hysteresis voltage to charge the capacitor;
the auxiliary voltage stabilizing output circuit is used for compensating the voltage difference between the high threshold and the low threshold of the hysteresis charging circuit to output a stable voltage, and the voltage output end of the hysteresis charging circuit is connected with the voltage input end of the auxiliary voltage stabilizing output circuit;
the voltage feedback circuit is used for feeding back an output voltage value to the voltage regulating output circuit, the input end of the voltage feedback circuit is connected with the voltage output end of the auxiliary voltage stabilizing output circuit, and the output end of the voltage feedback circuit is connected with the signal control end of the auxiliary voltage stabilizing output circuit.
Further, the voltage feedback circuit samples the voltage output by the voltage output end of the auxiliary voltage stabilizing output circuit and feeds the voltage back to the auxiliary voltage stabilizing output circuit.
Further, the voltage generated by the hysteresis charging circuit charges the capacitor, the capacitor stops charging when the voltage of the capacitor reaches the highest threshold value, the capacitor is self-discharged, and when the voltage of the capacitor reaches the lowest threshold value, the circuit starts to recharge the capacitor again.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model utilizes the characteristic of almost zero ripple of self-discharging of the capacitor and the characteristic of low ripple output of the small-voltage auxiliary voltage stabilizing output circuit to output low ripple voltage stabilizing, and the auxiliary voltage stabilizing output circuit, the hysteresis charging circuit and the voltage feedback circuit are matched, the voltage feedback circuit is used for feeding back an output voltage value to the auxiliary voltage stabilizing output circuit, and the auxiliary voltage stabilizing output circuit is used for compensating the voltage difference of a high threshold and a low threshold of the hysteresis charging circuit to output stable voltage, so that the voltage drop of the capacitor is compensated, on one hand, the output voltage is kept stable, and on the other hand, the auxiliary voltage stabilizing output circuit adopts small-voltage power supply, the ripple is small, the output is easy to control, and the finally output voltage keeps the low ripple voltage stabilizing output, so that a discharge circuit or other control circuits matched with the auxiliary voltage stabilizing output circuit generate small interference.
Drawings
FIG. 1 is a block diagram of a capacitor-charged low ripple voltage regulator output circuit according to the present utility model.
Fig. 2 is an electrical schematic of the present utility model.
In the figure: 1. a hysteresis charging circuit; 2. a voltage feedback circuit; 3. and an auxiliary voltage stabilizing output circuit.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-2, the present utility model provides the following technical solutions:
example 1
A capacitive charge low ripple voltage regulated output circuit, comprising: a capacitor C1; the hysteresis charging circuit 1 is electrically connected with the capacitor C1, the hysteresis charging circuit 1 is used for generating certain hysteresis voltage to charge the capacitor C1, the charging or stopping action is stopped when the voltage of the capacitor C1 reaches the highest threshold value, the capacitor C1 is self-discharged, when the voltage of the capacitor C1 reaches the lowest threshold value, the circuit starts to charge the capacitor C1 again, and the main circuit does not work during the self-discharging period of the capacitor C1, and the output ripple is almost zero;
the auxiliary voltage stabilizing output circuit 2 is used for compensating the voltage difference between the high threshold and the low threshold of the hysteresis charging circuit 1 to output a stable voltage, the voltage output end of the hysteresis charging circuit 1 is connected with the voltage input end of the auxiliary voltage stabilizing output circuit 2, the auxiliary voltage stabilizing output circuit 2 is powered by small voltage and is superimposed on the hysteresis charging voltage 1 circuit to compensate the fluctuation generated by self-descending of the voltage of the capacitor C1 generated by the hysteresis charging circuit 1, and the power supply voltage of the circuit is lower due to the fact that the circuit works in a small voltage range, and the theoretical absolute quantity of ripple generated by the circuit is lower;
the voltage feedback circuit 3, the voltage feedback circuit 3 is used for feeding back output voltage value to the voltage regulation output circuit, the voltage output end of supplementary steady voltage output circuit 2 is connected to the input of voltage feedback circuit 3, output capacitor C2 is connected to the voltage output end, the signal control end of supplementary steady voltage output circuit 2 is connected to the output end 3 of voltage feedback circuit, the voltage that voltage feedback circuit 3 exports the voltage output end of supplementary steady voltage output circuit 2 carries out the sampling to feed back to supplementary steady voltage output circuit 2, the voltage of final output carries out steady voltage output after feeding back according to voltage feedback circuit 3.
The present embodiment is implemented as follows:
when the auxiliary voltage stabilizing output circuit is used, the characteristic that ripple waves are almost zero when a capacitor C1 is automatically discharged (a main circuit does not work temporarily) is utilized to be matched with the auxiliary voltage stabilizing output circuit 2, so that voltage drop of the capacitor C1 is compensated, on one hand, output voltage stability is kept, meanwhile, total output ripple wave quantity is mainly generated by the auxiliary voltage stabilizing output circuit 2, the auxiliary voltage stabilizing output circuit 2 adopts a low-voltage stabilizing circuit, the output voltage amplitude range of the auxiliary voltage stabilizing output circuit is approximately equal to the voltage amplitude of self-discharging drop of the capacitor C1, and as the auxiliary voltage stabilizing output circuit 2 adopts small-voltage power supply, ripple wave output is easy to control, when the voltage regulating range of the auxiliary voltage stabilizing output circuit 2 is 12V, the ripple waves can be lower than 10mv under normal conditions, and at the moment, the integral output ripple waves are also lower than 10mv, so that the discharging circuit or other control circuits matched with the auxiliary voltage stabilizing output circuit produce small interference.
Example two
As a simulation case of the first embodiment, the maximum threshold value of the hysteresis charging circuit 1 for charging the capacitor C1 is 1000V, the minimum threshold value is 990V, when the voltage on the capacitor C1 reaches 1000V, the charging hysteresis circuit stops charging the capacitor C1, the voltage on the capacitor C1 slowly drops, about 10S drops to the minimum threshold 990V, and at this time, the hysteresis charging circuit 1 is filled up to the maximum threshold 1000V in 0.3S. The resistors R7 and R8 form a divided voltage feedback circuit 3, when the output voltage is high, the output voltage of the reference chip U3 is reduced, the optocoupler U2 is cut off, the triode Q3 is cut off, the direct-current stabilized power supply module V2 stops charging output, when the output voltage is low, the reference chip U3 is enabled to output high voltage, the optocoupler U2 is conducted, the triode Q3 is conducted, the direct-current stabilized power supply module V2 charges output, and finally the output voltage is enabled to be stabilized at 995V; the auxiliary voltage stabilizing output circuit 2 comprises a direct current voltage stabilizing power supply module V2, an optocoupler U2, a reference chip U3, a triode Q3 and other elements.
The voltage fluctuation of the hysteresis charging circuit 1 is compensated by the auxiliary voltage stabilizing output circuit 2, and finally the output voltage is stabilized, since most of the charging hysteresis circuit 1 is in a non-charging state and the ripple wave of the slow descending capacitor C1 is almost zero, the ripple wave size of the final output is determined by the ripple wave of the auxiliary voltage stabilizing output circuit 2, and since the auxiliary voltage stabilizing output circuit 2 adopts a linear voltage stabilizing circuit, the ripple wave of the linear voltage stabilizing circuit is relatively easy to achieve about 10mv through optimized combination, and the whole output ripple wave can achieve about 10 mv.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A capacitor-charged low ripple voltage regulated output circuit, comprising:
a capacitor;
the hysteresis charging circuit is electrically connected with the capacitor and is used for generating certain hysteresis voltage to charge the capacitor;
the auxiliary voltage stabilizing output circuit is used for compensating the voltage difference between the high threshold and the low threshold of the hysteresis charging circuit to output a stable voltage, and the voltage output end of the hysteresis charging circuit is connected with the voltage input end of the auxiliary voltage stabilizing output circuit;
the voltage feedback circuit is used for feeding back an output voltage value to the voltage regulating output circuit, the input end of the voltage feedback circuit is connected with the voltage output end of the auxiliary voltage stabilizing output circuit, and the output end of the voltage feedback circuit is connected with the signal control end of the auxiliary voltage stabilizing output circuit.
2. The capacitor-charged low-ripple voltage-stabilizing output circuit of claim 1, wherein: the voltage feedback circuit samples the voltage output by the voltage output end of the auxiliary voltage stabilizing output circuit and feeds the voltage back to the auxiliary voltage stabilizing output circuit.
3. The capacitor-charged low-ripple voltage-stabilizing output circuit of claim 1, wherein: the voltage generated by the hysteresis charging circuit charges the capacitor, the capacitor stops charging when the voltage of the capacitor reaches the highest threshold value, the capacitor is self-discharged, and when the voltage of the capacitor reaches the lowest threshold value, the circuit starts to recharge the capacitor again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322374650.XU CN220775655U (en) | 2023-09-01 | 2023-09-01 | Capacitor charging low ripple voltage stabilizing output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322374650.XU CN220775655U (en) | 2023-09-01 | 2023-09-01 | Capacitor charging low ripple voltage stabilizing output circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220775655U true CN220775655U (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322374650.XU Active CN220775655U (en) | 2023-09-01 | 2023-09-01 | Capacitor charging low ripple voltage stabilizing output circuit |
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| Country | Link |
|---|---|
| CN (1) | CN220775655U (en) |
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2023
- 2023-09-01 CN CN202322374650.XU patent/CN220775655U/en active Active
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