CN107462762B - Combined power supply output end current conversion voltage telemetry circuit and implementation method thereof - Google Patents
Combined power supply output end current conversion voltage telemetry circuit and implementation method thereof Download PDFInfo
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- CN107462762B CN107462762B CN201710798024.XA CN201710798024A CN107462762B CN 107462762 B CN107462762 B CN 107462762B CN 201710798024 A CN201710798024 A CN 201710798024A CN 107462762 B CN107462762 B CN 107462762B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0046—Arrangements for measuring currents or voltages or for indicating presence or sign thereof characterised by a specific application or detail not covered by any other subgroup of G01R19/00
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Abstract
The invention relates to a remote measuring circuit for current conversion voltage of an output end of a combined power supply and an implementation method thereof, wherein the output end of a sampling unit outputs the combined power supply voltage, and the voltage input end and the voltage output end of the sampling unit are respectively connected with the signal input end of an error amplifying unit; the signal output end of the error amplifying unit is connected with the signal input end of the comparison circuit unit; the signal output end of the reference voltage unit is connected with the signal input end of the comparison circuit unit; the signal output end of the comparison circuit unit is connected with the signal input end of the voltage stabilizing circuit unit. The invention can realize that each path of telemetering voltage is in linear proportion with each path of output voltage of the combined switch power supply, is convenient and comprehensive to monitor the stability of the output voltage when the output voltage changes along with the load, and outputs the telemetering voltage after being isolated by the operational amplifier, thereby ensuring that the voltage of the combined switch power supply is not influenced by external factors such as test or overshoot, and improving the safety and the adaptability of the circuit.
Description
Technical Field
The invention relates to a circuit for monitoring the voltage stability of a switching power supply and a timely realization method thereof.
Background
The switching power supply and the AC/DC converter are widely applied to civil and military electronic systems such as aerospace, aviation, ships, weapons, electronics, communication, industrial automation equipment and the like. In some systems, to facilitate power supply to each partial system, switching power supply modules with different output voltages are usually combined together to form a power supply combination with an independent packaging structure. In order to monitor the stability of the power supply voltage of the sub-system at any time, the system generally requires a telemetry circuit to be designed in a power supply combination, the most common of the telemetry circuit is that the output voltage is realized through a sampling resistor voltage dividing circuit, but if more subtle changes are to be observed, and the external factors of the telemetry circuit are ensured not to influence the output voltage of the power supply, the system can put forward more complex requirements, such as the telemetry voltage is output after being isolated by an operational amplifier, and the telemetry voltage is linearly changed along with the change of the output load current, and the conditions such as the maximum voltage stabilizing value, the maximum leakage current and the like are regulated, so that the voltage telemetry circuit in the field can not meet the monitoring requirements at present.
Disclosure of Invention
The invention aims to provide a current-conversion voltage telemetry circuit of a combined power supply output end, which can realize that each path of telemetry voltage is in linear proportion to the power supply voltage and meets the more complex technical requirements of a system.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the current conversion voltage telemetry circuit of the output end of the combined power supply comprises a sampling unit, wherein the output end of the combined power supply voltage is connected with the input end of the sampling unit, the output end of the sampling unit outputs the combined power supply voltage, and the voltage input end and the voltage output end of the sampling unit are respectively connected with the signal input end of an error amplifying unit; the signal output end of the error amplifying unit is connected with the signal input end of the comparison circuit unit; the signal output end of the reference voltage unit is connected with the signal input end of the comparison circuit unit; the signal output end of the comparison circuit unit is connected with the signal input end of the voltage stabilizing circuit unit.
The other ends of the reference voltage unit and the voltage stabilizing circuit unit, which are connected with the comparison circuit unit, are grounded.
A remote measuring circuit for current conversion voltage at the output end of a combined power supply is characterized in that a sampling unit is a sampling resistor.
The implementation method of the current-conversion voltage telemetry circuit of the output end of the combined power supply comprises the following steps:
(1) The sampling unit samples the output voltage and sends the output voltage to the error amplifying unit;
(2) The reference voltage unit generates a high-precision reference voltage as the reference voltage of the error amplifying unit;
(3) The error amplifying unit is used for comparing the output high-level or low-level signal with the reference voltage through the comparison circuit unit according to the change of the load current flowing through the sampling unit to generate an error amplifying signal;
(4) When the load current is lower than a preset value, the comparison circuit unit outputs a low level as a telemetry signal; when the load current exceeds a preset value, the comparison circuit unit outputs a high level, and the high level is stabilized at a preset voltage value through the voltage stabilizing circuit unit to serve as a telemetry signal.
A method for realizing a current-conversion voltage telemetry circuit at the output end of a combined power supply, wherein the error amplification signal is a linear error amplification signal.
By adopting the technical scheme, the invention has the beneficial effects that:
the current conversion voltage telemetry circuit at the output end of the combined power supply can enable each path of telemetry voltage to be in linear proportion to the power supply voltage, monitor the stability of the output voltage when the output voltage changes along with a load, output the telemetry voltage after being isolated by an operational amplifier, and ensure that the power supply voltage is not influenced by external factors such as testing or overshoot. The safety and the adaptability of the circuit are improved, and a guarantee is provided for the safety of the load system of the whole machine.
Drawings
FIG. 1 is a schematic block diagram of a current-to-voltage telemetry circuit for implementing a combined power supply output of the present invention.
Detailed Description
See the drawings. The current conversion voltage telemetry circuit of the combined power supply output end comprises a sampling unit 1, wherein the combined power supply voltage output end is connected with the input end of the sampling unit 1, the output end of the sampling unit 1 outputs combined power supply voltage, and the voltage input end and the voltage output end of the sampling unit 1 are respectively connected with the signal input end of an error amplifying unit 2; the signal output end of the error amplifying unit 2 is connected with the signal input end of the comparison circuit unit 4; the signal output end of the reference voltage unit 3 is connected with the signal input end of the comparison circuit unit 4; the signal output terminal of the comparison circuit unit 4 is connected with the signal input terminal of the voltage stabilizing circuit unit 5. The other ends of the reference voltage unit 3 and the voltage stabilizing circuit unit 5, which are connected with the comparison circuit unit 4, are grounded. The sampling unit 1 is a sampling resistor.
The implementation method of the current-conversion voltage telemetry circuit of the combined power supply output end comprises the following steps:
(1) The sampling unit 1 samples the output voltage and sends the output voltage to the error amplifying unit 2;
(2) The reference voltage unit 3 generates a high-precision reference voltage as the reference voltage of the error amplifying unit 2;
(3) The error amplifying unit 2 compares the output high level or low level signal with the reference voltage according to the change of the load current flowing through the sampling unit 1 through the comparison circuit unit 4 to generate an error amplifying signal;
(4) When the load current is lower than a preset value, the comparison circuit unit 4 outputs a low level as a telemetry signal; when the load current exceeds a preset value, the comparator circuit unit 4 outputs a high level, and the high level is stabilized at a preset voltage value as a telemetry signal through the voltage stabilizing circuit unit 5.
According to the technical scheme, the linear proportion of each path of telemetry voltage to each path of output voltage of the combined switch power supply is realized by adopting a simple circuit structure, the stability of the output voltage along with the change of a load is conveniently and fully monitored, the telemetry voltage is output after being isolated by the operational amplifier, the voltage of the combined switch power supply is not influenced by external factors such as testing or overshoot, the safety and the adaptability of the circuit are improved, and the safety of a load system of the whole machine is ensured.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (5)
1. The current conversion voltage telemetry circuit of the output end of the combined power supply comprises a sampling unit (1), wherein the output end of the combined power supply voltage is connected with the input end of the sampling unit (1), and the output end of the sampling unit (1) outputs the combined power supply voltage; the signal output end of the error amplifying unit (2) is connected with the signal input end of the comparison circuit unit (4); the signal output end of the reference voltage unit (3) is connected with the signal input end of the comparison circuit unit (4); the signal output end of the comparison circuit unit (4) is connected with the signal input end of the voltage stabilizing circuit unit (5).
2. The remote sensing circuit for the current conversion voltage of the output end of the combined power supply according to claim 1, wherein the other ends of the reference voltage unit (3) and the voltage stabilizing circuit unit (5) which are connected with the comparison circuit unit (4) are grounded.
3. The circuit for remote measurement of current-converted voltage at output end of combined power supply according to claim 1, wherein said sampling unit (1) is a sampling resistor.
4. The method for implementing a combined power output current-to-voltage telemetry circuit of claim 1, comprising the steps of:
the sampling unit (1) samples the output voltage and sends the output voltage to the error amplifying unit (2);
the reference voltage unit (3) generates a high-precision reference voltage as the reference voltage of the error amplifying unit (2);
the error amplifying unit (2) compares the output high level or low level signal according to the change of the load current flowing through the sampling unit (1) with the reference voltage through the comparison circuit unit (4) to generate an error amplifying signal;
when the load current is lower than a preset value, the comparison circuit unit (4) outputs a low level as a telemetry signal; when the load current exceeds a preset value, the comparison circuit unit (4) outputs a high level, and the high level is stabilized at a preset voltage value through the voltage stabilizing circuit unit (5) to serve as a telemetry signal.
5. The method of claim 4 wherein said error amplified signal is a linear error amplified signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710798024.XA CN107462762B (en) | 2017-09-06 | 2017-09-06 | Combined power supply output end current conversion voltage telemetry circuit and implementation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710798024.XA CN107462762B (en) | 2017-09-06 | 2017-09-06 | Combined power supply output end current conversion voltage telemetry circuit and implementation method thereof |
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| Publication Number | Publication Date |
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| CN107462762A CN107462762A (en) | 2017-12-12 |
| CN107462762B true CN107462762B (en) | 2023-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710798024.XA Active CN107462762B (en) | 2017-09-06 | 2017-09-06 | Combined power supply output end current conversion voltage telemetry circuit and implementation method thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108808628A (en) * | 2018-08-27 | 2018-11-13 | 艾乐德电子（南京）有限公司 | A kind of test power supply with telemetry function |
Citations (5)
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|---|---|---|---|---|
| JP2009290947A (en) * | 2008-05-27 | 2009-12-10 | Fujitsu Ten Ltd | Switching regulator and electronic equipment |
| CN102255526A (en) * | 2011-06-23 | 2011-11-23 | 深圳市富满电子有限公司南山分公司 | AC-DC power supply conversion chip and power switching circuit |
| CN103547041A (en) * | 2013-10-30 | 2014-01-29 | 辉芒微电子（深圳）有限公司 | LED driver circuit |
| CN105262326A (en) * | 2015-11-16 | 2016-01-20 | 中国电子科技集团公司第四十三研究所 | Starting control circuit for output linear voltage of switching power supply |
| CN207232237U (en) * | 2017-09-06 | 2018-04-13 | 中国电子科技集团公司第四十三研究所 | A kind of integrated drive generator output end current changes voltage telemeering circuit |
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2017
- 2017-09-06 CN CN201710798024.XA patent/CN107462762B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009290947A (en) * | 2008-05-27 | 2009-12-10 | Fujitsu Ten Ltd | Switching regulator and electronic equipment |
| CN102255526A (en) * | 2011-06-23 | 2011-11-23 | 深圳市富满电子有限公司南山分公司 | AC-DC power supply conversion chip and power switching circuit |
| CN103547041A (en) * | 2013-10-30 | 2014-01-29 | 辉芒微电子（深圳）有限公司 | LED driver circuit |
| CN105262326A (en) * | 2015-11-16 | 2016-01-20 | 中国电子科技集团公司第四十三研究所 | Starting control circuit for output linear voltage of switching power supply |
| CN207232237U (en) * | 2017-09-06 | 2018-04-13 | 中国电子科技集团公司第四十三研究所 | A kind of integrated drive generator output end current changes voltage telemeering circuit |
Non-Patent Citations (1)
| Title |
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| 薛秀云 ; 宋淑然 ; 吕永青 ; 郑逸生 ; .单相AC-DC变换电路设计及试验.现代电子技术.2014,第37卷(第24期),全文. * |
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| CN107462762A (en) | 2017-12-12 |
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