CN215897583U - Voltage stabilizing circuit based on bleeder resistor - Google Patents
Voltage stabilizing circuit based on bleeder resistor Download PDFInfo
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- CN215897583U CN215897583U CN202121524613.7U CN202121524613U CN215897583U CN 215897583 U CN215897583 U CN 215897583U CN 202121524613 U CN202121524613 U CN 202121524613U CN 215897583 U CN215897583 U CN 215897583U
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Abstract
The utility model discloses a voltage stabilizing circuit based on a bleeder resistor, which overcomes the problem of overhigh heating of a power supply caused by voltage stabilization through a voltage stabilizing tube in the prior art, and comprises an input module, a voltage dividing module for adjusting a voltage stabilizing value, a voltage comparator and a voltage stabilizing module for discharging residual current, wherein the input module is connected with the input end of the voltage dividing module and the input end of the voltage stabilizing module; the input module comprises a power supply VIN and a power supply V _48V, wherein the power supply VIN is used as an input end of the input module and is a power supply rectified by an RC power supply, and the power supply V _48V is used as an output end of the input module. According to the utility model, the voltage comparator is combined with resistor discharge to realize voltage stabilization of the level, the heating risk caused by surface temperature rise of the voltage-stabilizing tube is prevented, the mode of residual current discharge of the resistor is safer and more reliable, and the circuit does not have risk in operation.
Description
Technical Field
The utility model relates to the technical field of RC power supplies, in particular to a voltage stabilizing circuit based on a bleeder resistor.
Background
The RC power supply has wide application, and its working principle is to limit the maximum working current by using the capacitive reactance generated by the capacitor at a specific ac signal frequency. After the RC power supply is rectified, voltage stabilization is needed, and the consumption of a rear-end load and the input range of a front-end power supply need to be comprehensively considered when a voltage stabilization value is selected. After the existing RC power supply is rectified, a voltage stabilizing tube is generally used for stabilizing voltage, and residual current is discharged through heating of the voltage stabilizing tube. In some applications, both a wide range of input voltage is required, and a large dynamic load is required, under the condition that voltage stabilization is performed through the voltage stabilizing tube, the residual current is large, the problem that the voltage stabilizing tube is overheated during working can be caused, and therefore the risk of a power supply is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that the power supply is excessively high in heating caused by voltage stabilization through a voltage stabilizing tube in the prior art, and provides a voltage stabilizing circuit based on a bleeder resistor, so that the power supply is prevented from being overheated caused by the voltage stabilizing tube, the voltage stabilizing function is realized, and residual current is discharged.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a voltage stabilizing circuit based on a bleeder resistor comprises an input module, a voltage dividing module, a voltage comparator and a voltage stabilizing module, wherein the voltage dividing module is used for adjusting a voltage stabilizing value, the voltage stabilizing module is used for discharging residual current, the input module is connected with the input end of the voltage dividing module and the input end of the voltage stabilizing module, the voltage dividing module is connected with the voltage comparator, the voltage stabilizing module comprises at least one NPN type triode, and the voltage dividing module comprises a front-stage module and a rear-stage module; the input module comprises a power supply VIN and a power supply V _48V, wherein the power supply VIN is used as an input end of the input module and is a power supply rectified by an RC power supply, and the power supply V _48V is used as an output end of the input module.
According to the utility model, a power supply VIN is rectified by an RC power supply and is used as the input of the whole circuit, a power supply V _48V is output after passing through an input module, the power supply V _48V is supplied to a voltage comparator through a voltage division module, the voltage comparator is an integrated chip, when the voltage division voltage is higher than the internal reference voltage of the voltage comparator, the voltage comparator outputs a high level to conduct a triode of a voltage stabilization module, and the power supply VIN discharges residual current through the voltage stabilization module; when the voltage V-48V of the power supply is reduced to be lower than the reference voltage of the voltage comparator, the voltage comparator outputs low level, the triode is disconnected, the voltage stabilizing circuit does not work, the voltage of the power supply VIN rises again, and the voltage stabilization is realized in a circulating reciprocating mode.
Preferably, the front module and the rear module are connected in series, and an input end and an output end of the rear module are respectively connected in parallel to an input end and a ground end of the voltage comparator. And the voltage obtained by the rear-stage module enters a voltage comparator for comparison.
Preferably, the input module further includes a diode D1, the power source VIN is connected to the anode of the diode D1, and the cathode of the diode D1 is connected to the power source V _ 48V. The power source VIN outputs V _48V through the diode D1.
Preferably, the front module comprises a resistor R16 and a resistor R17, the power supply V _48V is connected with one end of the resistor R16, the other end of the resistor R16 is connected with one end of the resistor R17, and the other end of the resistor R17 is connected with the voltage comparator and the input end of the rear module as the output end of the front module.
Preferably, the rear-stage module includes a capacitor C1, a resistor R40, and a resistor R42, one end of the capacitor C1 is connected to one end of the resistor R40 and the input end of the voltage comparator, the other end of the resistor R40 is connected to one end of the resistor R42, and the other ends of the capacitor C1 and the resistor R42 are all grounded.
The adjustment of the stable voltage value is realized by adjusting the resistance values of the voltage dividing resistors R16, R17, R40 and R42.
Preferably, the voltage stabilizing module includes a transistor Q5, a transistor Q6, a resistor R26, a resistor R27, a resistor R28 and a resistor R37, the voltage of the output terminal of the voltage comparator is VOUT, the output terminal of the voltage comparator is connected to the base of the transistor Q5, the emitter of the transistor Q5 is connected to one end of the resistor R37 and the base of the transistor Q6, the power supply VIN is connected to one end of the resistor R26, one end of the resistor R27 and one end of the resistor R28, the other end of the resistor R26 is connected to the other end of the resistor R27, the other end of the resistor R28 and the collector of the transistor Q6, and the emitter of the transistor Q6 and the other end of the resistor R37 are both grounded.
And the resistance values of the resistor R26, the resistor R27 and the resistor R28 are adjusted to realize the adjustment of residual current leakage.
Preferably, the power supply further comprises a triode Q4, a resistor R12, a resistor R14, a resistor R19 and a resistor R22, wherein the input end of the voltage comparator is connected with the emitter of the triode Q4, the base of the triode Q4 is respectively connected with the collector of the triode Q4, one end of the resistor R19 and one end of the resistor R12, the other end of the resistor R12 is respectively connected with the power supply V _5V5, one end of the resistor R14 and one end of the resistor R22, the other end of the resistor R22 is connected with the base of the triode Q5, the other end of the resistor R14 is connected with the collector of the triode Q5, and the other end of the resistor R19 is grounded.
Preferably, the voltage value of the input end of the voltage comparator is VDD, the internal reference voltage is Vref, and the voltage of the output end is VOUT.
Therefore, the utility model has the following beneficial effects:
1. according to the utility model, voltage stabilization of the level is realized by combining the voltage comparator with resistor discharge, and the field work operation risk caused by excessive heating due to surface temperature rise due to the use of a voltage stabilizing tube is prevented;
2. the mode of residual current of resistance discharge is safer and more reliable under the same operational environment, and the circuit work is risk-free.
Drawings
Fig. 1 is a schematic circuit diagram of the present embodiment.
In the figure: 1. the device comprises an input module 2, a voltage division module 21, a front-stage module 22, a rear-stage module 3, a voltage comparator 4 and a voltage stabilization module.
Detailed Description
The utility model is further described with reference to the following detailed description and accompanying drawings.
Example (b):
the present embodiment provides a voltage stabilizing circuit based on a bleeder resistor, as shown in fig. 1, including an input module 1, a voltage dividing module 2, a voltage comparator 3 and a voltage stabilizing module 4, where the voltage dividing module 2 includes a front-stage module 21 and a rear-stage module 22, the input module includes a power source VIN and a power source V _48V, the input terminal of the power source VIN serving as the input module is a power source rectified by an RC power source, and the power source V _48V is the output terminal of the input module. The front-stage module is connected with the rear-stage module in series, and the input end and the output end of the rear-stage module are respectively connected with the input end and the grounding end of the voltage comparator in parallel.
The input module further comprises a diode D1, the power VIN is connected with the anode of the diode D1, and the cathode of the diode D1 is connected with the power V _ 48V.
The front-stage module comprises a resistor R16 and a resistor R17, a power supply V _48V is connected with one end of the resistor R16, the other end of the resistor R16 is connected with one end of a resistor R17, and the other end of the resistor R17 is used as an output end of the front-stage module and is connected with input ends of the voltage comparator and the rear-stage module.
The rear-stage module comprises a capacitor C1, a resistor R40 and a resistor R42, one end of the capacitor C1 is connected with one end of the resistor R40 and the input end of the voltage comparator respectively, the other end of the resistor R40 is connected with one end of the resistor R42, and the other end of the capacitor C1, the other end of the resistor R42 and the ground end of the voltage comparator are all grounded.
The voltage stabilizing module comprises a triode Q5, a triode Q6, a resistor R26, a resistor R27, a resistor R28 and a resistor R37, the output end voltage of the voltage comparator is VOUT, the output end of the voltage comparator is connected with the base of a triode Q5, the emitter of the triode Q5 is respectively connected with one end of the resistor R37 and the base of a triode Q6, a power supply VIN is respectively connected with one end of the resistor R26, one end of the resistor R27 and one end of the resistor R28, the other end of the resistor R26 is respectively connected with the other end of the resistor R27, the other end of the resistor R28 and the collector of the triode Q6, and the emitter of the triode Q6 and the other end of the resistor R37 are both grounded. Transistor Q5 is model LMBT2222ALT1G and transistor Q6 is model NSS60201LT 1G.
The voltage comparator further comprises a triode Q4, a resistor R12, a resistor R14, a resistor R19 and a resistor R22, the input end of the voltage comparator is connected with the emitter of the triode Q4, the base of the triode Q4 is respectively connected with the collector of the triode Q4, one end of the resistor R19 is connected with one end of the resistor R12, the other end of the resistor R12 is respectively connected with a power supply V _5V5, one end of the resistor R14 is connected with one end of the resistor R22, the other end of the resistor R22 is connected with the base of the triode Q5, the other end of the resistor R14 is connected with the collector of the triode Q5, and the other end of the resistor R19 is grounded. Transistor Q4 is model LMBT2222ALT 1G.
The voltage value of the input end of the voltage comparator is VDD, the internal reference voltage is Vref, and the voltage of the output end of the voltage comparator is VOUT.
The working principle of the utility model is as follows: the power source VIN is a rectified power source of the RC power source, and outputs a power source V _48V through a diode D1. The power supply V _48V divides the voltage of the power supply V _48V into a voltage comparator integrated chip through a resistor, when the voltage is higher than the internal reference voltage Vref, VOUT outputs a high level to enable the triode to be conducted, and the power supply VIN discharges current through resistors R26-R28; when the voltage V-48V drops to be lower than the reference voltage of the comparator, VOUT outputs low level, the triode is disconnected, the resistors R26-R28 do not work, and VIN voltage rises again. According to the principle, the circulating switch realizes voltage stabilization.
In the principle, the requirements of different voltage stabilizing values can be realized by adjusting the voltage dividing resistor R16, the resistor R17, the resistor R40 and the resistor R42; the resistor R26, the resistor R27 and the resistor R28 are adjusted, and proper resistors can be selected for residual current leakage.
The embodiment also provides a comparative example, the same RC power supply is stabilized through 2 voltage stabilizing tubes SZ5524, 48V is output, three-phase 230V and 50Hz alternating current is input at the front end, and after three-phase full-wave rectification, the surface temperature of the voltage stabilizing tubes reaches 90 ℃, the internal temperature is higher, the heat generation of the voltage stabilizing tubes is large, and the risk of field work operation is large under the condition that the ambient temperature is 20 ℃.
V _48V of the utility model is stabilized between 48V and 51V, and resistors R26-R28 discharge current, so that proper resistors are selected in different occasions, and the circuit does not have risk during operation.
The above embodiments are only for further illustration of the present invention, and should not be construed as limiting the scope of the present invention, and the technical engineers in the art can make many insubstantial modifications and adaptations of the present invention based on the above disclosure and disclosure.
Claims (7)
1. A voltage stabilizing circuit based on a bleeder resistor is characterized by comprising an input module (1), a voltage dividing module (2) used for adjusting a voltage stabilizing value, a voltage comparator (3) and a voltage stabilizing module (4) used for discharging residual current, wherein the input module (1) is connected with the input end of the voltage dividing module (2) and the input end of the voltage stabilizing module (4), the voltage dividing module (2) is connected with the voltage comparator (3), the voltage stabilizing module (4) comprises at least one NPN type triode, and the voltage dividing module (2) comprises a front-stage module (21) and a rear-stage module (22); the input module (1) comprises a power supply VIN and a power supply V _48V, wherein the power supply VIN is used as an input end of the input module (1) and is a power supply rectified by an RC power supply, and the power supply V _48V is an output end of the input module (1).
2. The bleeder resistance based voltage stabilizing circuit as claimed in claim 1, wherein said pre-stage module (21) is connected in series with the post-stage module (22), and the input and output of the post-stage module (22) are connected in parallel to the input and ground of the voltage comparator (3), respectively.
3. The bleeder resistance based voltage stabilizing circuit as claimed in claim 1, wherein said input module (1) further comprises a diode D1, the power source VIN being connected to the anode of the diode D1, and the cathode of the diode D1 being connected to the power source V _ 48V.
4. The bleeder resistor-based voltage regulation circuit as claimed in claim 1 or 2, wherein said pre-stage module (21) comprises a resistor R16 and a resistor R17, a power supply V _48V is connected to one end of the resistor R16, the other end of the resistor R16 is connected to one end of the resistor R17, and the other end of the resistor R17 is connected as an output terminal of the pre-stage module (21) to input terminals of the voltage comparator (3) and the post-stage module (22).
5. The bleeder resistor-based voltage regulator circuit as claimed in claim 1 or 2, wherein said post-stage module (22) comprises a capacitor C1, a resistor R40 and a resistor R42, one end of the capacitor C1 is connected to one end of the resistor R40 and the input end of the voltage comparator (3), the other end of the resistor R40 is connected to one end of the resistor R42, and the other end of the capacitor C1, the other end of the resistor R42 and the ground end of the voltage comparator (3) are all grounded.
6. The bleeder resistor-based voltage stabilizing circuit as claimed in claim 1, wherein the voltage stabilizing module (4) comprises a transistor Q5, a transistor Q6, a resistor R26, a resistor R27, a resistor R28 and a resistor R37, the voltage of the output terminal of the voltage comparator (3) is VOUT, the output terminal of the voltage comparator (3) is connected to the base of a transistor Q5, the emitter of the transistor Q5 is connected to one end of a resistor R37 and the base of a transistor Q6, the power source VIN is connected to one end of a resistor R26, one end of a resistor R27 and one end of a resistor R28, the other end of a resistor R26 is connected to the other end of a resistor R27, the other end of a resistor R28 and the collector of a transistor Q6, and the emitter of the transistor Q6 and the other end of a resistor R37 are both grounded.
7. The bleeder resistance based voltage regulator circuit as claimed in claim 1, wherein said voltage comparator (3) has a voltage value at the input terminal of VDD, an internal reference voltage of Vref and a voltage value at the output terminal of VOUT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121524613.7U CN215897583U (en) | 2021-07-06 | 2021-07-06 | Voltage stabilizing circuit based on bleeder resistor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121524613.7U CN215897583U (en) | 2021-07-06 | 2021-07-06 | Voltage stabilizing circuit based on bleeder resistor |
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| Publication Number | Publication Date |
|---|---|
| CN215897583U true CN215897583U (en) | 2022-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121524613.7U Active CN215897583U (en) | 2021-07-06 | 2021-07-06 | Voltage stabilizing circuit based on bleeder resistor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113507202A (en) * | 2021-07-06 | 2021-10-15 | 浙江瑞银电子有限公司 | Voltage stabilizing circuit based on bleeder resistor |
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2021
- 2021-07-06 CN CN202121524613.7U patent/CN215897583U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113507202A (en) * | 2021-07-06 | 2021-10-15 | 浙江瑞银电子有限公司 | Voltage stabilizing circuit based on bleeder resistor |
| CN113507202B (en) * | 2021-07-06 | 2022-07-26 | 浙江瑞银电子有限公司 | Voltage stabilizing circuit based on bleeder resistor |
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