CN213517517U - Isolation boosting equipment - Google Patents
Isolation boosting equipment Download PDFInfo
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- CN213517517U CN213517517U CN202021570323.1U CN202021570323U CN213517517U CN 213517517 U CN213517517 U CN 213517517U CN 202021570323 U CN202021570323 U CN 202021570323U CN 213517517 U CN213517517 U CN 213517517U
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Abstract
The utility model discloses an keep apart step-up equipment belongs to electric measurement technical field. The utility model discloses equipment, include: the power supply input end inputs standard secondary low-voltage to the voltage conditioning feedback compensation unit; the voltage conditioning feedback compensation unit is used for leading out feedback voltage from the output voltage of the rear-end boosting unit to the positive input end of the inverting amplifier OP1 and compensating the input standard secondary low-voltage; the voltage boosting unit is used for carrying out isolated boosting on the output voltage of the voltage conditioning feedback compensation unit and outputting a boosted voltage and a feedback voltage; an output terminal that outputs the boosted voltage as a target boosted voltage. The utility model discloses reduced isolated form booster and reverse amplifier element's inherent error, improved the area load ability of voltage divider, avoided the influence of secondary load to detection error.
Description
Technical Field
The utility model relates to an electricity measurement technical field to more specifically relates to an keep apart boosting equipment.
Background
The voltage divider is a special instrument for high-voltage measurement, and has the advantages of accurate test, good linearity, stable performance and the like, and is widely applied, so that the annual inspection quantity is large. During detection, the secondary voltage of the voltage divider is detected to have high-voltage output of more than 100V.
When the electronic voltage divider is adopted to detect a test sample, the secondary output signal voltage is lower and is generally within 5V, and the secondary high-voltage difference measurement with the test sample needs to amplify the signal to be the same as the secondary voltage output of the test sample.
If the electronic voltage divider standard is adopted to connect an electronic circuit to directly output high voltage, when a core part of the circuit breaks down, the highest direct current voltage of a circuit power supply can be directly output and applied to an external load, and the damage of rear-end connection equipment can be caused.
If the voltage is amplified by the standard secondary connection isolation type booster of the electronic voltage divider, due to the existence of the output internal resistance of the mutual inductor, when a load is connected, a certain voltage drop is caused, load errors are caused, and the accuracy of the standard secondary output of the voltage divider is influenced.
Disclosure of Invention
To the above problem, the utility model provides an keep apart step-up equipment, a serial communication port, equipment includes:
the power input end inputs standard secondary low-voltage to the reverse amplification module;
the voltage conditioning feedback compensation unit is used for leading feedback voltage out from the output voltage of the rear-end boosting unit, and the positive input end of an inverting amplifier OP1 of the voltage conditioning feedback compensation unit is used for compensating the input standard secondary low-voltage;
the boosting unit is used for carrying out isolated boosting on the reverse amplification voltage and outputting a boosted voltage and a feedback voltage;
an output terminal that outputs the boosted voltage as a target boosted voltage.
Optionally, the voltage conditioning feedback compensation unit includes: a resistor R1, a resistor R2, a capacitor C1 and an inverting amplifier OP 1;
the resistor R1 is connected in series with the resistor R2, the capacitor C1 and the inverting amplifier OP1 are connected in parallel with two ends of the resistor R2, and the compensation voltage led out of the secondary side of the boosting unit is connected with the non-inverting input end of the inverting amplifier OP 1.
Optionally, the voltage boost unit includes: the secondary side of the isolated transformer is provided with n sections of windings, and compensation voltage is led out from the secondary side and is connected with the non-inverting input end of the inverting amplifier OP 1.
Optionally, the compensation voltage is the sum of voltages lost by an operational amplifier circuit and an isolated transformer, which are formed by resistors R1, R2 and OP 1.
The utility model discloses an input of this device is inserted to the voltage divider secondary side, can be on voltage amplification's basis, guarantees the precision of voltage and the safety of circuit component equipment through isolated form booster and voltage feedback compensation, has reduced the intrinsic error of isolated form booster and reverse amplification component simultaneously, has improved the area load ability of voltage divider, has avoided the secondary load to the influence of detection error.
Drawings
Fig. 1 is the utility model relates to an keep apart the booster unit structure chart.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
The utility model provides an keep apart step-up equipment, as shown in figure 1, include:
the power input end inputs standard secondary low-voltage to the reverse amplification module;
the voltage conditioning feedback compensation unit is used for leading feedback voltage out from the output voltage of the rear-end boosting unit, and the positive input end of an inverting amplifier OP1 of the voltage conditioning feedback compensation unit is used for compensating the input standard secondary low-voltage;
the boosting unit is used for carrying out isolated boosting on the reverse amplification voltage and outputting a boosted voltage and a feedback voltage;
an output terminal that outputs the boosted voltage as a target boosted voltage.
A voltage conditioning feedback compensation unit comprising: a resistor R1, a resistor R2, a capacitor C1 and an inverting amplifier OP 1;
the resistor R1 is connected in series with the resistor R2, the capacitor C1 and the inverting amplifier OP1 are connected in parallel with two ends of the resistor R2, and the compensation voltage led out of the secondary side of the boosting unit is connected with the non-inverting input end of the inverting amplifier OP 1.
A boost unit comprising: the secondary side of the isolated transformer is provided with n sections of windings, and the secondary side of the isolated transformer is connected with the non-inverting input end and the output end of the inverting amplifier OP 1.
The compensation voltage is the sum of the voltages lost by the operational amplifier circuit formed by the resistors R1, R2 and OP1 and the isolated transformer.
The line of the equipment is mainly divided into two parts, wherein the first part is a voltage conditioning feedback compensation unit and comprises OP1, C1, R1 and R2 as shown in figure 1, and the second part is an isolated booster which is characterized in that n sections of windings are wound twice in an inductive voltage divider mode, voltage is led out from the last section of the winding and fed back to the non-inverting input end of OP 1;
if the input voltage of the power input end is Vi, the output voltage of the amplifying circuit is Vo, the voltage of the inverting end of the operational amplifier is V-, the output of the boosting transformer is Vh, the feedback voltage is Vf, and N is the transformation ratio of the isolated transformer
The error of an operational amplifier circuit formed by resistors R2, R1 and OP1 is set as epsilon 1, the error of a booster output is set as epsilon 2 and comprises an excitation error and a load error, a booster output winding adopts a winding form of an inductive voltage divider, and the error of Vf relative to Vh/n is set as epsilon 3. The operational amplifier principle can be used as follows:
where V ═ V + ═ Vf, then:
and considering errors of each link into the following steps:
and (3) arrangement simplification:
wherein
If N is equal to N, the following are:
where K is less than 1, then equation (5) may be about equal to:
it can be seen that, for the inverting amplifier circuit, the relation between the input and the output is constant 1, and the error is the negative value of the primary and secondary transmission error of the rear-end step-up transformer and the voltage division error of the feedback signal, and is related to the values of the resistors R1 and R2.
The output voltage Vh is then calculated:
since the winding form of the inductive voltage divider is adopted, epsilon 3 can be controlled within 10ppm generally, if K is designed to be 0.001, it can be seen that the error of the high-voltage side output of the booster becomes the error of Vf feedback voltage relative to Vh, and the error is only epsilon 3.
And for the feedback voltage its output becomes:
as can be seen from equations (7) and (8), the booster output is related to the error between the value of K and the booster output voltage divider feedback voltage, and by setting the appropriate value of K, controlling the secondary feedback voltage can obtain a boosted output within 0.02%.
The utility model discloses an isolated form voltage divider secondary side inserts the input of this device, can be on voltage amplification's basis, guarantees the precision of voltage and the safety of circuit element equipment through isolated form booster and voltage feedback compensation, has reduced the intrinsic error of isolated form booster and reverse amplification component simultaneously, has improved the area load ability of voltage divider, has avoided the secondary load to the influence of detection error.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The scheme in the embodiment of the application can be implemented by adopting various computer languages, such as object-oriented programming language Java and transliterated scripting language JavaScript.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (4)
1. An isolated boost device, characterized in that the device comprises:
the power supply input end inputs standard secondary low-voltage to the voltage conditioning feedback compensation unit;
the voltage conditioning feedback compensation unit is used for leading out feedback voltage from the output voltage of the rear-end boosting unit to the positive input end of the inverting amplifier OP1 and compensating the input standard secondary low-voltage;
the boosting unit is used for carrying out isolated boosting on the reverse amplification voltage and outputting a boosted voltage and a feedback voltage;
an output terminal that outputs the boosted voltage as a target boosted voltage.
2. The apparatus of claim 1, wherein the voltage conditioning feedback compensation unit comprises: a resistor R1, a resistor R2, a capacitor C1 and an inverting amplifier OP 1;
the resistor R1 is connected with the resistor R2 in series, the capacitor C1 and the inverting amplifier OP1 are connected with two ends of the resistor R2 in parallel, and the secondary side of the boosting unit is led out of compensation voltage and connected with the non-inverting input end of the inverting amplifier OP 1.
3. The apparatus of claim 1, wherein the boost unit comprises: the secondary side of the isolated transformer is provided with n sections of windings, and compensation voltage is led out from the secondary side and is connected with the non-inverting input end of the inverting amplifier OP 1.
4. The apparatus of claim 2, wherein the compensation voltage is a sum of voltages lost by the operational amplifier circuit and the isolated transformer formed by R1, R2 and OP 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021570323.1U CN213517517U (en) | 2020-07-31 | 2020-07-31 | Isolation boosting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021570323.1U CN213517517U (en) | 2020-07-31 | 2020-07-31 | Isolation boosting equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213517517U true CN213517517U (en) | 2021-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021570323.1U Active CN213517517U (en) | 2020-07-31 | 2020-07-31 | Isolation boosting equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213517517U (en) |
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2020
- 2020-07-31 CN CN202021570323.1U patent/CN213517517U/en active Active
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