CN108808628A - A kind of test power supply with telemetry function - Google Patents
A kind of test power supply with telemetry function Download PDFInfo
- Publication number
- CN108808628A CN108808628A CN201810978816.XA CN201810978816A CN108808628A CN 108808628 A CN108808628 A CN 108808628A CN 201810978816 A CN201810978816 A CN 201810978816A CN 108808628 A CN108808628 A CN 108808628A
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- circuit
- power supply
- telemetering
- test power
- output
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- 238000012360 testing method Methods 0.000 title claims abstract description 40
- 238000005070 sampling Methods 0.000 claims abstract description 26
- 230000005611 electricity Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 6
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1203—Circuits independent of the type of conversion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
Abstract
The present invention discloses a kind of test power supply with telemetry function, including error amplifying circuit, local sample circuit, telemetering sample circuit, voltage compensating circuit, selecting switch, the present invention increases a voltage compensating circuit in testing power supply so that test power supply is at telemetering end（sense）Do not connect or reversal connection in the case of; using local output sampling and the output of the voltage compensating circuit, the voltage of load end can be accurately obtained, and the excessively high any device of damage of local output voltage will not be caused; it can be effectively protected circuit output, increase power supply reliability energy.
Description
Technical field
The present invention relates to test power technique fields, and in particular to a kind of test power supply with telemetry function.
Background technology
Test power supply currently on the market largely has telemetry function（Sense functions）, telemetry function can make load two
The precision of voltage regulation at end is maintained in the specification of technology requirement.When the distance between power supply and load to be measured are remote, load current is big, even
Connect loop pressure drop it is big in the case of, can by the ends telemetering sense directly detect load both ends voltage, to ensure its lasting accuracy.
Fig. 1 is detection wiring diagram.Compared with load line, the electric current very little on the line of telemetering end.It is distant when the voltage for loading both ends declines
Surveying the signal of end feedback can make power supply generate the response that a voltage rises, thus compensate for the decline of load both end voltage.?
Resistance R2, R3 are accessed between the corresponding voltage output end of voltage and telemetering end, when can prevent telemetering end from opening a way, output voltage is excessively high
Rise.
Fig. 2 is the circuit diagram of power supply distal end sampling in the prior art, and sense circuits are to be connected to local Vo by a resistance
It exports, connects connection resistance R3 between the negative terminal and the negative terminal of Vo of resistance R2, Vs in figure between the anode of Vs and the anode of Vo,
Vs carries out difference sampling by OP07, then carries out error amplification by U2B error amplifiers, feeds back to power supply, controls power supply
Output.This circuit simply realizes well, but a disadvantage is that when sense reversal connections or when not connecing, R2, R3 resistance can damage, this
Scheme is only suitable for will not be in wrong scheme in SENSE.
Invention content
In view of the above problems, the purpose of the present invention is to provide a kind of test circuit, even if telemetering SENSE terminations are wrong
It can ensure that output voltage excessively high will not rise, ensure the safety of test.
The present invention specifically adopts the following technical scheme that：
A kind of test power supply with telemetry function, including error amplifying circuit, it is characterised in that further include：
One local sample circuit, for carrying out difference sampling to test power output end voltage；
One telemetering sample circuit, for carrying out difference sampling to test power supply telemetering terminal voltage；
One voltage compensating circuit is connected between local sample circuit and the output end of telemetering sample circuit, for compensating telemetering
The pressure drop of load end when holding reversal connection or not connecing；
One selecting switch, under external signal control, connecting the output of local sample circuit or telemetering sample circuit to institute
State error amplifying circuit.
The present invention increases a voltage compensating circuit in testing power supply so that test power supply is at telemetering end（sense）No
Connect or reversal connection in the case of, using local output sampling and the output of the voltage compensating circuit, can accurately obtain load end
Voltage, and the excessively high any device of damage of local output voltage will not be caused, it can be effectively protected circuit output, increase power supply
Unfailing performance.
Description of the drawings
Fig. 1 is existing detection wiring diagram；
Fig. 2 is the circuit diagram of existing power supply distal end sampling；
Fig. 3 is one structure chart of embodiment.
Fig. 4 is two structure chart of embodiment.
Fig. 5 is embodiment three-circuit schematic diagram.
Specific implementation mode
Technical scheme of the present invention is described in further detail below in conjunction with the accompanying drawings：
Embodiment one
As shown in figure 3, a kind of test power supply with telemetry function, including local sample circuit（Vo is sampled）, telemetering sample circuit
（Vs is sampled）, subtraction circuit, selecting switch and error amplifier.Vo sample circuits be used for test power output end voltage into
Row difference samples, and Vs sample circuits are used for test power supply telemetering end（The ends sense）Voltage carries out difference sampling.Subtraction circuit
The pressure drop of load end when for compensating the reversal connection of telemetering end or do not connect, when output end output voltage is equal to the reversal connection of telemetering end or does not connect
The voltage of load input terminal.Subtraction circuit tool is separately connected the defeated of Vo sample circuits and Vs sample circuits there are two connecting pin
Outlet.The output end of Vo sample circuits and Vs sample circuits is respectively connected to the stationary contact of selecting switch, and selecting switch is in outside
Under signal control, the output of Vo sample circuits, Vs sample circuits or subtraction circuit is sent into test power control loop
Error amplifier.
Embodiment two
As shown in figure 4, the present embodiment is similar to one structure of embodiment, the difference is that with a diode in place subtracter electricity
Road, the output end of the anode connection Vo sample circuits of diode, cathode connect the output end of Vs sample circuits.
Embodiment one is suitable for any power circuit, is not connect by subtracter compensating sense or pressure drop when reversal connection, real
It applies example two and can be used for low-tension supply, offset voltage is fixed, and sense does not connect or when reversal connection, and offset voltage is non-adjustable.
Embodiment three
As shown in figure 5, to realize the schematic diagram for the test circuit for testing power supply with telemetry function using subtraction circuit.
The test circuit of the present embodiment includes the first amplifier U1 (op07) and the second amplifier U2 (op07), the first amplifier U1
The ends input terminal connecting test power supply telemetering sense, for test power supply telemetering terminal voltage Vs carry out difference sampling；Second fortune
The input terminal connecting test power output end of U2 is put, for carrying out difference sampling to test power output end voltage Vo.
Test circuit includes subtraction circuit, mainly by third amplifier (TL0821D) and the 4th resistance R4 being serially connected,
5th resistance R5 compositions, the output end (6 foot) of the first amplifier U1 are connected to third amplifier (TL0821D) through first resistor R1
Inverting input.The output end of second amplifier U2 is connected to the in-phase input end of third amplifier U3B, the second fortune through the 5th resistance R5
The power supply negative terminal for putting U2 connects -5V power supplys.4th resistance R4 is not connected to -5V power supplys with the 5th resistance R5 other ends connecting.
The output end of third amplifier U3B is connected to its inverting input through the first diode D1,3rd resistor R3.
Test circuit includes relay（RY210024）, the inverting input of third amplifier U3B is connected to relay K1's
One stationary contact（5 feet）, the output end of the second amplifier U2 is connected to another stationary contact of relay K1（4 feet）, relay K1
Movable contact（3 feet）It is connected to the inverting input of error amplifier U4B in test power supply control loop, error amplifier U4B
In-phase input end connection DAC benchmark output.The control terminal of relay K1 connects sampling control signal, is divided into Vs samplings and Vo is adopted
Sample controls.
Circuit operation principle：
Under Vo normal modes, Vo samplings are sampled by the second amplifier U2 difference, and the output of 6 feet of U2 is direct by 4 feet of relay K1
It is connected to 6 feet of error amplifier U4B.
Vs normal modes（Sense patterns）Under, Vs sampling by the first amplifier U1 difference sample, 6 feet of U1 output by after
5 feet of electric appliance K1 are attached directly to 6 feet of error amplifier U4B.
Under Vs abnormal patterns, i.e. the ends Vs reversal connection or hanging, the electricity that Vo outputs pass through the second amplifier U2 difference sampling 6 feet of output
Pressure, the 4th resistance R4, the 5th resistance R5 partial pressure value be it is negative, U2 sampling 6 foot voltages by resistance R4, R5 partial pressure, obtain third
The 5 foot voltages of amplifier U3B are higher than 6 foot voltages of the first amplifier U1 in Vs sample circuits, and the 5 foot voltages of third amplifier U3B are approximate
The 6 foot voltages equal to U3B, the at this time output of 6 foot voltages, that is, subtracter of U3B are exported through relay K1, go driving error amplification
6 feet of device U4B, and Vs sample circuits do not export.The 5 foot voltage values of third amplifier U3B are multiplied by the amplification factor of Vs sampling outputs
Just obtain offset voltage, obtained offset voltage plus output voltage be exactly sense do not connect or when reversal connection load end voltage,
Essence is that Vo sampled voltages subtract a voltage to compensate the reversal connection of the ends sense or hanging voltage.
It should be noted that, R2, R3 in the present embodiment are not the prior art（Fig. 2）In R2, R3, using skill of the present invention
After art scheme, former R2, R3 no longer need.
Claims (8)
1. a kind of test power supply with telemetry function, including error amplifying circuit, it is characterised in that further include：
One local sample circuit, for carrying out difference sampling to test power output end voltage；
One telemetering sample circuit, for carrying out difference sampling to test power supply telemetering terminal voltage；
One voltage compensating circuit is connected between local sample circuit and the output end of telemetering sample circuit, for compensating telemetering
The pressure drop of load end when holding reversal connection or not connecing；
One selecting switch, under external signal control, connecting the output of local sample circuit or telemetering sample circuit to institute
State error amplifying circuit.
2. the test power supply with telemetry function as described in claim 1, it is characterised in that the voltage compensating circuit is by subtraction
Device circuit forms.
3. the test power supply with telemetry function as claimed in claim 2, it is characterised in that the subtraction circuit includes one
Operational amplifier and two resistance being serially connected, one end of resistance cascaded structure are connected to the output end of local sample circuit,
The other end connects a negative supply, and the series connection point of two resistance is connected to the in-phase input end of operational amplifier；Telemetering sampling electricity
The output end on road is connected to the inverting input of operational amplifier through a resistance；The output end of operational amplifier through a diode,
One resistance is connected to its inverting input.
4. the test power supply with telemetry function as claimed in claim 3, it is characterised in that the negative supply is by local sampling electricity
The negative supply of difference amplifier provides in road.
5. the test power supply with telemetry function as claimed in claim 2, it is characterised in that the voltage compensating circuit is by two poles
Pipe forms, and the output end of the local sample circuit of anode connection of diode, cathode connects the output end of telemetering sample circuit.
6. the test power supply with telemetry function as described in claim 1, it is characterised in that the selecting switch is relay, institute
Stating relay has a movable contact and at least two stationary contacts, the output end difference of the local sample circuit and telemetering sample circuit
Two stationary contacts of relay are connected to, the movable contact of the relay is connected to error in test power supply control loop and amplifies
Device；The control terminal of the relay connects sampling control signal.
7. the test power supply with telemetry function as described in claim 1, it is characterised in that the output of the voltage compensating circuit
The voltage of load input terminal when end output voltage is equal to the reversal connection of telemetering end or does not connect.
8. the test power supply with telemetry function as described in claim 1, it is characterised in that the external control signal includes VS
Sampling control signal and VO sampling control signals, when it is VS sampling control signals to control signal, the output of telemetering sample circuit
To the output of error amplifying circuit or voltage compensating circuit to error amplifying circuit, when control signal is VO sampling control signals
When, the output of local sample circuit to error amplifying circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810978816.XA CN108808628A (en) | 2018-08-27 | 2018-08-27 | A kind of test power supply with telemetry function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810978816.XA CN108808628A (en) | 2018-08-27 | 2018-08-27 | A kind of test power supply with telemetry function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108808628A true CN108808628A (en) | 2018-11-13 |
Family
ID=64081257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810978816.XA Pending CN108808628A (en) | 2018-08-27 | 2018-08-27 | A kind of test power supply with telemetry function |
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| Country | Link |
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| CN (1) | CN108808628A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112666485A (en) * | 2020-11-25 | 2021-04-16 | 山东云海国创云计算装备产业创新中心有限公司 | Power stability analysis device and power system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8710810B1 (en) * | 2010-06-23 | 2014-04-29 | Volterra Semiconductor Corporation | Systems and methods for DC-to-DC converter control |
| CN107462762A (en) * | 2017-09-06 | 2017-12-12 | 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 conversion voltage telemeering circuit and its implementation |
| CN107478947A (en) * | 2017-08-16 | 2017-12-15 | 艾德克斯电子（南京）有限公司 | A kind of SENSE is anti-reverse or the method missed |
| US20180135408A1 (en) * | 2013-12-20 | 2018-05-17 | John J. Cooley | Electromagnetic telemetry device |
| CN108319318A (en) * | 2018-04-09 | 2018-07-24 | 艾乐德电子（南京）有限公司 | The controllable Switching Power Supply and method of amplitude is fallen and risen to a kind of output voltage moment |
| CN208738832U (en) * | 2018-08-27 | 2019-04-12 | 艾乐德电子（南京）有限公司 | A kind of test power supply with telemetry function |
-
2018
- 2018-08-27 CN CN201810978816.XA patent/CN108808628A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8710810B1 (en) * | 2010-06-23 | 2014-04-29 | Volterra Semiconductor Corporation | Systems and methods for DC-to-DC converter control |
| US20180135408A1 (en) * | 2013-12-20 | 2018-05-17 | John J. Cooley | Electromagnetic telemetry device |
| CN107478947A (en) * | 2017-08-16 | 2017-12-15 | 艾德克斯电子（南京）有限公司 | A kind of SENSE is anti-reverse or the method missed |
| CN107462762A (en) * | 2017-09-06 | 2017-12-12 | 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 conversion voltage telemeering circuit and its implementation |
| CN108319318A (en) * | 2018-04-09 | 2018-07-24 | 艾乐德电子（南京）有限公司 | The controllable Switching Power Supply and method of amplitude is fallen and risen to a kind of output voltage moment |
| CN208738832U (en) * | 2018-08-27 | 2019-04-12 | 艾乐德电子（南京）有限公司 | A kind of test power supply with telemetry function |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112666485A (en) * | 2020-11-25 | 2021-04-16 | 山东云海国创云计算装备产业创新中心有限公司 | Power stability analysis device and power system |
| CN112666485B (en) * | 2020-11-25 | 2022-07-29 | 山东云海国创云计算装备产业创新中心有限公司 | Power stability analysis device and power system |
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