CN210573461U - Remote compensation power supply without feedback line - Google Patents
Remote compensation power supply without feedback line Download PDFInfo
- Publication number
- CN210573461U CN210573461U CN201921534159.6U CN201921534159U CN210573461U CN 210573461 U CN210573461 U CN 210573461U CN 201921534159 U CN201921534159 U CN 201921534159U CN 210573461 U CN210573461 U CN 210573461U
- Authority
- CN
- China
- Prior art keywords
- power supply
- circuit
- voltage
- feedback
- supply body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model relates to a no feedback line's distal end compensating power supply, include: the power supply comprises a power supply body and a differential amplifier, wherein the power supply body is a voltage stabilizing source with a feedback function, the differential amplifier is used for buffering power supply voltage and transmitting power supply to a load, and the far-end compensation power supply also comprises a voltage stabilizing circuit; the output current sampling circuit is used for collecting the current of the output end of the power supply body; an amplifying circuit. The utility model discloses no feedback line's distal end compensating power supply, through the size of return circuit electric current among the output current sampling circuit detection circuitry, the electric current signal that detects is enlargied through amplifier circuit and is handled, to enlarged electric current signal and settlement electric current contrast, according to the contrast difference, feedback correction signal, regulation and control circuit adjusts power supply body's output voltage value according to correction signal's size, make voltage amplitude after the pressure drop still can reach the required voltage's of load within the specified range, this compensating power supply has cancelled feedback line, conveniently detect, the fault rate has been reduced.
Description
Technical Field
The utility model relates to an electronic communication technical field specifically is no feedback line's distal end compensating power supply.
Background
The DC power supply has positive and negative electrodes, the positive electrode has high potential and the negative electrode has low potential, when the two electrodes are connected with the circuit, the constant potential difference can be maintained between the two ends of the circuit, so that the current from the positive electrode to the negative electrode is formed in the external circuit, and the AC power supply can provide a power supply with stable voltage and frequency, namely an AC stable power supply.
When the output line of the power supply is longer, the larger the output current is, the more obvious the line voltage drop is, the voltage at the load end is lower than the output voltage of the power supply, the load has an upper voltage limit and a lower voltage limit in the running process, if the voltage exceeds the working range of the load, the load cannot work normally, therefore, the voltage at the load end needs to be adjusted to a specified range, therefore, the power supply generally adopts four-wire output in the transmission process, wherein two wires are used for receiving the voltage feedback of the load end, the output voltage of the power supply is adjusted according to the voltage fed back by the load, the voltage at the load end is adjusted to the specified range, but the increase of the detection line is inconvenient, and faults are easy to occur.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the technical problem who exists among the prior art, provide the distal end compensation power supply who does not have the feedback line and solve above-mentioned problem.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a feedback-line-less remote compensation power supply comprising: the power supply comprises a power supply body and a differential amplifier, wherein the power supply body is a voltage stabilizing source with a feedback function, the differential amplifier is used for buffering power supply voltage and transmitting power supply to a load, and the far-end compensation power supply also comprises a voltage stabilizing circuit;
the output current sampling circuit is used for collecting the current of the output end of the power supply body;
the amplifying circuit is connected with the output current sampling circuit and used for amplifying the acquired current signal at the output end of the power supply body to obtain a reference current;
the correction module is connected with the amplifying circuit and used for comparing the reference current with the set current and sending out a correction signal;
and the regulating and controlling circuit is respectively connected with the correcting module and the power supply body and is used for receiving the correcting signal and correcting the output voltage of the power supply body according to the correcting signal.
Furthermore, the feedback-line-free far-end compensation power supply further comprises a driving circuit and a contactor, the contactor is arranged between the differential amplifier and the load, the driving circuit is respectively connected with the contactor and the output current sampling circuit, and the driving circuit is used for controlling the contactor to be closed.
Further, the power supply body is a DC-DC power supply module.
Further, a buffer module is arranged on the differential amplifier, and the buffer module is used for enabling the voltage of the non-inverting input end to be equal to the voltage of the inverting input end.
Further, the regulation and control circuit comprises a control unit and a receiving unit, wherein the receiving unit is used for correcting signals, and the control unit is used for sending out the correction signals.
The utility model has the advantages that: the remote compensation power supply without the feedback line has the advantages that in the operation process of the power supply body, the original unbalanced voltage is converted into the balanced voltage through the differential amplifier, the magnitude of loop current in the circuit is detected through the output current sampling circuit, meanwhile, the driving circuit can open the power supply contactor according to the control signal, so that a loop is formed between the power supply body and a load, when the circuit voltage or the current is higher than a critical value, the power supply contactor is rapidly disconnected, the circuit is effectively protected, the detected current signal is amplified through the amplifying circuit, the amplified current signal is compared with the set current, a correction signal is fed back according to the comparison difference, the regulating circuit regulates the output voltage value of the power supply body according to the magnitude of the correction signal, and the voltage amplitude after voltage drop can still reach the specified range of the voltage required by the load, the compensation power supply cancels a feedback line, is convenient to detect and reduces the failure rate.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a circuit diagram of the differential amplifier of the present invention.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
The utility model also provides an preferred embodiment
As shown in fig. 1 and 2, the utility model relates to a remote compensation power supply without feedback line, include: the power supply comprises a power supply body and a differential amplifier, wherein the power supply body is a voltage stabilizing source with a feedback function, the differential amplifier is used for buffering power supply voltage and transmitting power supply to a load, in the differential circuit, there is no in-phase or reverse circuit, both feedback circuits are reverse circuits, the differential signal is connected with in-phase input ends of two preceding-stage operational amplifiers, by amplifying the difference between the two input voltages, the single-ended unbalanced circuit is converted into a balanced circuit, the differential amplifier is provided with a buffer module, the buffer module is used for enabling the voltage of the non-inverting input end to be equal to the voltage of the inverting input end, the buffer module can be an AD8397 module, the negative feedback and open loop gain of the buffer module make the voltages of the inverting input end and the non-inverting input end equal, this technique allows buffering one voltage at a time with different boosting circuits and measuring each current separately, the remote compensation power supply further comprising;
the output current sampling circuit is used for collecting the current of the output end of the power supply body;
the amplifying circuit is connected with the output current sampling circuit and used for amplifying the acquired current signal at the output end of the power supply body to obtain a reference current;
the correction module is connected with the amplifying circuit and used for comparing the reference current with the set current and sending out a correction signal;
and the regulating and controlling circuit is respectively connected with the correcting module and the power supply body and is used for receiving the correcting signal and correcting the output voltage of the power supply body according to the correcting signal.
The feedback-line-free remote compensation power supply further comprises a driving circuit and a contactor, the contactor is arranged between the differential amplifier and a load, the driving circuit is respectively connected with the contactor and the output current sampling circuit, the driving circuit is used for controlling the contactor to be closed, the power supply body is a DC-DC power supply module, the regulating and controlling circuit comprises a control unit and a receiving unit, the receiving unit is used for correcting signals, and the control unit is used for sending the correcting signals.
To sum up, in the remote compensation power supply without feedback line, during the operation of the power supply body, the differential amplifier converts the original unbalanced voltage into the balanced voltage, the output current sampling circuit detects the magnitude of the loop current in the circuit, and the driving circuit opens the power supply contactor according to the control signal, so that a loop is formed between the power supply body and the load, when the circuit voltage or current is higher than the critical value, the power supply contactor is rapidly disconnected, thereby effectively protecting the circuit, the detected current signal is amplified by the amplifying circuit, the amplified current signal is compared with the set current, the correction signal is fed back according to the comparison difference, the regulating circuit regulates the output voltage value of the power supply body according to the magnitude of the correction signal, so that the voltage amplitude after voltage drop can still reach the specified range of the voltage required by the load, the compensation power supply cancels a feedback line, is convenient to detect and reduces the failure rate.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. A feedback-line-less remote compensation power supply, comprising: the power supply comprises a power supply body and a differential amplifier, wherein the power supply body is a voltage stabilizing source with a feedback function, the differential amplifier is used for buffering power supply voltage and transmitting power supply to a load, and the far-end compensation power supply also comprises a voltage stabilizing circuit;
the output current sampling circuit is used for collecting the current of the output end of the power supply body;
the amplifying circuit is connected with the output current sampling circuit and used for amplifying the acquired current signal at the output end of the power supply body to obtain a reference current;
the correction module is connected with the amplifying circuit and used for comparing the reference current with the set current and sending out a correction signal;
and the regulating and controlling circuit is respectively connected with the correcting module and the power supply body and is used for receiving the correcting signal and correcting the output voltage of the power supply body according to the correcting signal.
2. The feedback-line-less remote compensated power supply of claim 1, wherein: the feedback-line-free far-end compensation power supply further comprises a driving circuit and a contactor, the contactor is arranged between the differential amplifier and a load, the driving circuit is respectively connected with the contactor and the output current sampling circuit, and the driving circuit is used for controlling the contactor to be closed.
3. The feedback-line-less remote compensated power supply of claim 2, wherein: the power supply body is a DC-DC power supply module.
4. The feedback-line-less remote compensated power supply of claim 1, wherein: the differential amplifier is provided with a buffer module, and the buffer module is used for enabling the voltage of the non-inverting input end to be equal to the voltage of the inverting input end.
5. The feedback-line-less remote compensated power supply of claim 1, wherein: the regulation and control circuit comprises a control unit and a receiving unit, wherein the receiving unit is used for correcting signals, and the control unit is used for sending out the correction signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921534159.6U CN210573461U (en) | 2019-09-16 | 2019-09-16 | Remote compensation power supply without feedback line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921534159.6U CN210573461U (en) | 2019-09-16 | 2019-09-16 | Remote compensation power supply without feedback line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210573461U true CN210573461U (en) | 2020-05-19 |
Family
ID=70645857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921534159.6U Active CN210573461U (en) | 2019-09-16 | 2019-09-16 | Remote compensation power supply without feedback line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210573461U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112650346A (en) * | 2020-12-23 | 2021-04-13 | 黑龙江宇奇科技有限公司 | Closed-loop control method for output current of meridian therapeutic apparatus |
-
2019
- 2019-09-16 CN CN201921534159.6U patent/CN210573461U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112650346A (en) * | 2020-12-23 | 2021-04-13 | 黑龙江宇奇科技有限公司 | Closed-loop control method for output current of meridian therapeutic apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9203345B2 (en) | Power supply circuit, power supply system, and radio communication apparatus | |
| CN101297475A (en) | Method and arrangement for optimizing efficiency of a power amplifier | |
| US9000743B2 (en) | Multi-channel constant voltage and constant current converting controller and apparatus | |
| US20090058377A1 (en) | Constant voltage to constant current transferring controller | |
| CN210573461U (en) | Remote compensation power supply without feedback line | |
| US8731412B2 (en) | Common base circuit with output compensation, current-to-voltage circuit configured with common base amplifier, and optical receiver implemented with the same | |
| JP2020005124A (en) | Tranceimpedance amplifier | |
| WO2017160556A1 (en) | Generation of voltage reference signals in a hybrid switched mode amplifier | |
| CN201536350U (en) | Low noise wideband pre-amplifier | |
| JP2008289047A (en) | Amplifier | |
| CN103915829A (en) | Overvoltage absorption protection circuit | |
| CN109245530A (en) | It is a kind of for stablizing the circuit and power adapter of output signal | |
| CN111181514A (en) | Signal calibration device of medical endoscope | |
| CN111641243A (en) | Earphone charging circuit and device | |
| CN110677134A (en) | Self-adaptive bandwidth adjusting circuit | |
| CN212588305U (en) | Power amplification circuit and detection terminal | |
| CN200986675Y (en) | Line loss compensation circuit and constant voltage power supply equipped with the same | |
| CN212258494U (en) | Earphone charging circuit and device | |
| US6552615B1 (en) | Method and system for compensation of low-frequency photodiode current in a transimpedance amplifier | |
| CN107102676A (en) | Low pressure difference linear voltage regulator | |
| US6233163B1 (en) | Automatic balance adjusting device for AC power supply | |
| CN112821741A (en) | Power supply current equalizing circuit, power supply module, power supply system and computer equipment | |
| CN212588335U (en) | 850nm high-speed transmitting system | |
| CN217640049U (en) | Constant current source circuit and relay protection testing device | |
| CN204669221U (en) | A kind of DC-DC Switching Power Supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |