CN208971491U - A kind of Sense terminal compensation circuit with amplitude limitation function - Google Patents
A kind of Sense terminal compensation circuit with amplitude limitation function Download PDFInfo
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- CN208971491U CN208971491U CN201821888070.5U CN201821888070U CN208971491U CN 208971491 U CN208971491 U CN 208971491U CN 201821888070 U CN201821888070 U CN 201821888070U CN 208971491 U CN208971491 U CN 208971491U
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Abstract
The utility model provides a kind of Sense terminal compensation circuit with amplitude limitation function, comprising: power output end voltage sample and amplitude compensation setting circuit, the first signal behavior diode, second signal select diode, Sense terminal voltage sample circuit.When power output end voltage compensation value is not up to amplitude compensation setting value, signal Usense is less than Usource, Usample signal is equal to Usense, and Sense terminal (load end) voltage is equal to the voltage value of operator's setting at this time, and power output end voltage is greater than the set value；After power output end voltage compensation value reaches amplitude compensation setting value, signal Usense is more than or equal to Usource, Usample signal is equal to Usource, power output end voltage is equal to the sum of voltage value and amplitude compensation setting value of setting at this time, and Sense terminal (load end) voltage is less than or equal to setting value.To realize that power supply still can work normally when reaching amplitude compensation setting value, without stopping suddenly, protective effect is played to load equipment.
Description
Technical field
The utility model relates to direct current power source voltage amplitude compensation technical fields, especially a kind of to have amplitude limitation function
Sense terminal compensation circuit.
Background technique
In the application of powerful power supply, the output end of DC power supply is attached by conducting wire with load, biggish electricity
After stream flows through conducting wire, there are larger pressure drops above conducting wire, and the voltage so as to cause the power of voltage ratio output end of load end is less than normal,
In order to make load end obtain desired voltage value, need to be connected to load end using Sense terminal to detect the voltage of load end,
The voltage for needing to detect power output end simultaneously prevents the voltage of power output end excessive and power supply is caused to damage, that is, needs pair
The amplitude of voltage compensation is limited.
Conventional Sense terminal compensation circuit is as shown in Figure 1, 2, resistance R1 in Fig. 1, resistance R2, resistance R3, resistance R4,
The voltage sampling circuit of operational amplifier U1A composition, for acquiring the voltage of Sense terminal, the i.e. voltage of load end, and will adopt
The Sense terminal voltage collected is as voltage sampling signal Usample；Resistance R5, resistance R6, resistance R7, resistance in Fig. 2
The voltage sampling circuit of R8, operational amplifier U1B composition, it is for acquiring the voltage of power output end, collected power supply is defeated
The voltage of outlet is labeled as signal Usource；The voltage of power output end is excessive and power supply is caused to damage in order to prevent, need by
Signal Usource and la tension de reference Uref est are compared, and can be gradually become smaller as power output end voltage increases Usource, when
When Usource is less than Uref, the output end alarm signal Error of comparator U1C can be become high level, triggering report from low level
Alert, i.e., voltage compensation amplitude has reached maximum setting value, and power supply itself can stop exporting, and cannot continue to provide electric energy to load,
Power supply stops output suddenly may result in load equipment damage.
Utility model content
The Sense terminal compensation circuit with amplitude limitation function that the purpose of the utility model is to provide a kind of, it is intended to solve
When certainly Sense terminal compensation circuit voltage compensation amplitude reaches maximum value in the prior art, power supply stops output to load equipment
The problem of be easy to causeing damage realizes that power supply still can work normally when reaching amplitude compensation setting value, to protect load
Equipment.
To reach above-mentioned technical purpose, the utility model provides a kind of Sense terminal benefit with amplitude limitation function
Circuit is repaid, the circuit includes:
Power output end voltage sample and amplitude compensation setting circuit, the first signal behavior diode, second signal selection
Diode, Sense terminal voltage sample circuit；
The power output end voltage sample and amplitude compensation setting circuit carry out power output end voltage input signal
Amplitude compensation generates power output end voltage sampling signal, and the power output end voltage sampling signal is connected to second signal choosing
The cathode of diode is selected, the anode of the second signal selection diode is connected to voltage sampling signal；
Sense terminal voltage input signal is converted and generates Sense terminal voltage by the Sense terminal voltage sample circuit
Sampled signal, the Sense terminal voltage sampled signal are connected to the cathode of the first signal behavior diode, first signal
The anode of selection diode is connected to voltage sampling signal.
Preferably, the power output end voltage sample and amplitude compensation setting circuit include sampling resistor R5, sampling electricity
It hinders R6, sampling resistor R7, feedback resistance R8, compensation amplitude and resistance R9, operational amplifier U1B is set.
Preferably, the one end the sampling resistor R5 is connected to the positive Usource+ of power output end voltage, and the other end connects
It is connected to the inverting input terminal of operational amplifier U1B, the one end sampling resistor R6 is connected to the cathode of power output end voltage
Usource-, the other end are connected to the non-inverting input terminal of operational amplifier U1B, and the one end sampling resistor R7 is connected to operational amplifier
The non-inverting input terminal of U1B, the other end are connected to the ground, and the one end feedback resistance R8 is connected to the inverting input terminal of operational amplifier U1B,
The other end is connected to the output end of U1B, and compensation amplitude setting one end resistance R9 is connected to -15V voltage, and the other end is connected to operation
The inverting input terminal of amplifier U1B forms an add circuit, is asked power output end voltage and -15V voltage
With obtain the power output end voltage sampling signal Usource after amplitude compensation is arranged.
Preferably, when power output end voltage compensation value is not up to amplitude compensation setting value, signal Usense is less than
Usource, Usample signal are equal to Usense, and Sense terminal voltage is equal to the voltage value of setting, power output end electricity at this time
Pressure is greater than the set value.
Preferably, after power output end voltage compensation value reaches amplitude compensation setting value, signal Usense is more than or equal to
Usource, Usample signal are equal to Usource, and the voltage value that power output end voltage is equal to setting at this time is set with amplitude compensation
The sum of value is set, and Sense terminal voltage is less than or equal to setting value.
Preferably, the power output end voltage sampling signal and Sense terminal voltage sampled signal are negative value, and
Can linearly it reduce with the increase of voltage.
The effect provided in utility model content is only the effect of embodiment, rather than whole effects that utility model is all
Fruit, a technical solution in above-mentioned technical proposal have the following advantages that or the utility model has the advantages that
Compared with prior art, the utility model devises a kind of Sense terminal compensation electricity with amplitude limitation function
Road, including power output end voltage sample and amplitude compensation setting circuit, the first signal behavior diode, second signal selection two
Pole pipe, Sense terminal voltage sample circuit.When power output end voltage compensation value is not up to amplitude compensation setting value, signal
Usense is less than Usource, and Usample signal is equal to Usense, and Sense terminal (load end) voltage is equal to operator at this time
The voltage value of setting, power output end voltage are greater than the set value；When power output end voltage compensation value reaches amplitude compensation setting
After value, signal Usense is more than or equal to Usource, and Usample signal is equal to Usource, and power output end voltage is equal at this time
The sum of the voltage value of setting and amplitude compensation setting value, and Sense terminal (load end) voltage is less than or equal to setting value.To real
Existing power supply still can work normally when reaching amplitude compensation setting value, without stopping suddenly, play to load equipment
Protective effect.
Detailed description of the invention
Fig. 1 is a kind of conventional end Sense voltage sampling circuit figure provided in the utility model embodiment；
Fig. 2 is a kind of conventional power output end voltage sampling circuit figure provided in the utility model embodiment；
Fig. 3 is a kind of Sense terminal compensation electricity with amplitude limitation function provided in the utility model embodiment
Lu Tu.
Specific embodiment
In order to clearly illustrate the technical characterstic of this programme, below by specific embodiment, and its attached drawing is combined, to this
Utility model is described in detail.Following disclosure provides many different embodiments or example is used to realize the utility model
Different structure.In order to simplify the disclosure of the utility model, hereinafter the component of specific examples and setting are described.This
Outside, the utility model can in different examples repeat reference numerals and/or letter.This repetition is in order to simplified and clear
Purpose itself does not indicate the relationship between discussed various embodiments and/or setting.It should be noted that illustrated in the accompanying drawings
Component be not drawn necessarily to scale.The utility model be omitted the description to known assemblies and treatment technology and process to avoid
It is unnecessarily limiting the utility model.
With reference to the accompanying drawing to a kind of Sense terminal with amplitude limitation function provided by the utility model embodiment
Compensation circuit is described in detail.
As shown in figure 3, the utility model embodiment discloses a kind of Sense terminal compensation electricity with amplitude limitation function
Road, comprising:
Power output end voltage sample and amplitude compensation setting circuit, the first signal behavior diode, second signal selection
Diode, Sense terminal voltage sample circuit；
The power output end voltage sample and amplitude compensation setting circuit carry out power output end voltage input signal
Amplitude compensation generates power output end voltage sampling signal, and the power output end voltage sampling signal is connected to second signal choosing
The cathode of diode is selected, the anode of the second signal selection diode is connected to voltage sampling signal；
Sense terminal voltage input signal is converted and generates Sense terminal voltage by the Sense terminal voltage sample circuit
Sampled signal, the Sense terminal voltage sampled signal are connected to the cathode of the first signal behavior diode, first signal
The anode of selection diode is connected to voltage sampling signal.
The power output end voltage sample and amplitude compensation setting circuit convert power output end voltage input signal
At the power output end voltage sampling signal Usource by amplitude compensation setting, the Usource signal is connected to the second letter
Number selection diode D2 cathode, second signal selection diode D2 anode be connected to voltage sampling signal Usample, it is described
Usample signal is also connected with the anode of the first signal behavior diode D1, the cathode connection of the first signal behavior diode D1
To Sense terminal voltage sampled signal Usense, Sense terminal voltage is inputted by Sense terminal voltage sample circuit and is believed
Number it is converted into Sense terminal voltage sampled signal Usense.
The power output end voltage sample and amplitude compensation setting circuit include sampling resistor R5, sampling resistor R6, adopt
Resistance R9, operational amplifier U1B is arranged in sample resistance R7, feedback resistance R8, compensation amplitude；
The one end sampling resistor R5 is connected to the positive Usource+ of power output end voltage, and the other end is connected to operation amplifier
The inverting input terminal of device U1B, the one end sampling resistor R6 are connected to the cathode Usource- of power output end voltage, other end connection
To the non-inverting input terminal of operational amplifier U1B, the one end sampling resistor R7 is connected to the non-inverting input terminal of operational amplifier U1B, separately
One end is connected to the ground, and the one end feedback resistance R8 is connected to the inverting input terminal of operational amplifier U1B, and the other end is connected to U1B's
Output end, compensation amplitude setting one end resistance R9 are connected to -15V voltage, and the reverse phase that the other end is connected to operational amplifier U1B is defeated
Enter end, form an add circuit, is summed, obtained by amplitude compensation to power output end voltage and -15V voltage
Power output end voltage sampling signal Usource after setting.
The Sense terminal voltage sample circuit is the custom circuit of this field, and therefore not to repeat here.
Collecting power output end voltage sampling signal Usource and Sense terminal voltage sampled signal Usense is
Negative value, and can linearly reduce with the increase of voltage, the effect of signal behavior diode D1 and D2 are to make final voltage
Sampled signal Usample is equal to lesser one in Usource and Usense the two, when Usample is equal to voltage set value
When, power supply exports a constant voltage, and in addition -15V voltage and amplitude compensation setting resistance R9 are connected with operational amplifier U1B
Afterwards, add operation has been carried out to power output end voltage, has not carried out signal Usource ratio bigger than normal when amplitude compensation setting.
When power output end voltage compensation value is not up to amplitude compensation setting value, signal Usense is less than Usource,
Usample signal is equal to Usense, and Sense terminal (load end) voltage is equal to the voltage value of operator's setting, power supply at this time
Output end voltage is greater than the set value.
After power output end voltage compensation value reaches amplitude compensation setting value, signal Usense is more than or equal to Usource,
Usample signal be equal to Usource, at this time power output end voltage be equal to setting voltage value and amplitude compensation setting value it
With, and Sense terminal (load end) voltage is less than or equal to setting value.
The utility model devises a kind of Sense terminal compensation circuit with amplitude limitation function, including power supply output
Voltage sample and amplitude compensation setting circuit, the first signal behavior diode, second signal is held to select diode, Sense terminal
Voltage sampling circuit.When power output end voltage compensation value is not up to amplitude compensation setting value, signal Usense is less than
Usource, Usample signal are equal to Usense, and Sense terminal (load end) voltage is equal to the voltage of operator's setting at this time
Value, power output end voltage are greater than the set value；After power output end voltage compensation value reaches amplitude compensation setting value, signal
Usense is more than or equal to Usource, and Usample signal is equal to Usource, and power output end voltage is equal to the voltage of setting at this time
The sum of value and amplitude compensation setting value, and Sense terminal (load end) voltage is less than or equal to setting value.To realize that power supply is reaching
It still can work normally when to amplitude compensation setting value, without stopping suddenly, protective effect played to load equipment.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (6)
1. a kind of Sense terminal compensation circuit with amplitude limitation function, which is characterized in that the circuit includes:
Power output end voltage sample and amplitude compensation setting circuit, the first signal behavior diode, second signal select two poles
Pipe, Sense terminal voltage sample circuit；
The power output end voltage sample and amplitude compensation setting circuit carry out amplitude to power output end voltage input signal
Compensation generates power output end voltage sampling signal, and the power output end voltage sampling signal is connected to second signal selection two
The anode of the cathode of pole pipe, the second signal selection diode is connected to voltage sampling signal；
The Sense terminal voltage sample circuit, which converts Sense terminal voltage input signal, generates the sampling of Sense terminal voltage
Signal, the Sense terminal voltage sampled signal are connected to the cathode of the first signal behavior diode, first signal behavior
The anode of diode is connected to voltage sampling signal.
2. a kind of Sense terminal compensation circuit with amplitude limitation function according to claim 1, which is characterized in that
The power output end voltage sample and amplitude compensation setting circuit include sampling resistor R5, sampling resistor R6, sampling resistor R7,
Resistance R9, operational amplifier U1B is arranged in feedback resistance R8, compensation amplitude.
3. a kind of Sense terminal compensation circuit with amplitude limitation function according to claim 2, which is characterized in that
The one end the sampling resistor R5 is connected to the positive Usource+ of power output end voltage, and the other end is connected to operational amplifier
The inverting input terminal of U1B, the one end sampling resistor R6 are connected to the cathode Usource- of power output end voltage, and the other end is connected to
The non-inverting input terminal of operational amplifier U1B, the one end sampling resistor R7 is connected to the non-inverting input terminal of operational amplifier U1B, another
End is connected to the ground, and the one end feedback resistance R8 is connected to the inverting input terminal of operational amplifier U1B, and the other end is connected to the defeated of U1B
Outlet, compensation amplitude setting one end resistance R9 are connected to -15V voltage, and the other end is connected to the anti-phase input of operational amplifier U1B
End, forms an add circuit, is summed to power output end voltage and -15V voltage, obtains setting by amplitude compensation
The power output end voltage sampling signal Usource postponed.
4. a kind of Sense terminal compensation circuit with amplitude limitation function according to claim 3, which is characterized in that
When power output end voltage compensation value is not up to amplitude compensation setting value, signal Usense is less than Usource, Usamp l e
Signal is equal to Usense, and Sense terminal voltage is equal to the voltage value of setting at this time, and power output end voltage is greater than the set value.
5. a kind of Sense terminal compensation circuit with amplitude limitation function according to claim 3, which is characterized in that
After power output end voltage compensation value reaches amplitude compensation setting value, signal Usense is more than or equal to Usource, Usamp l
E signal is equal to Usource, and power output end voltage is equal to the sum of voltage value and amplitude compensation setting value of setting at this time, and
Sense terminal voltage is less than or equal to setting value.
6. a kind of Sense terminal compensation circuit with amplitude limitation function described in -5 any one according to claim 1,
It is characterized in that, the power output end voltage sampling signal and Sense terminal voltage sampled signal are negative value, and with electricity
The increase of pressure can linearly reduce.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821888070.5U CN208971491U (en) | 2018-11-16 | 2018-11-16 | A kind of Sense terminal compensation circuit with amplitude limitation function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821888070.5U CN208971491U (en) | 2018-11-16 | 2018-11-16 | A kind of Sense terminal compensation circuit with amplitude limitation function |
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| Publication Number | Publication Date |
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| CN208971491U true CN208971491U (en) | 2019-06-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738736A (en) * | 2018-12-07 | 2019-05-10 | 中电科仪器仪表(安徽)有限公司 | A kind of SENSE circuit |
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2018
- 2018-11-16 CN CN201821888070.5U patent/CN208971491U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738736A (en) * | 2018-12-07 | 2019-05-10 | 中电科仪器仪表(安徽)有限公司 | A kind of SENSE circuit |
| CN109738736B (en) * | 2018-12-07 | 2021-01-15 | 中电科仪器仪表(安徽)有限公司 | SENSE circuit |
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| TR01 | Transfer of patent right |
Effective date of registration: 20240515 Address after: Room 302, No. 1069 Gangxing Third Road, Export Processing Zone, High tech Zone, Jinan City, Shandong Province, 250104 Patentee after: Shandong Ainuo Intelligent Instrument Co.,Ltd. Country or region after: China Address before: No. 1069, Gangxing Third Road, export processing zone, hi tech Zone, Jinan City, Shandong Province Patentee before: SHANDONG AINUO INSTRUMENT Co.,Ltd. Country or region before: China |