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Clamping system and method

A technology of input and output terminals, applied to electrical components, emergency protection circuit devices for limiting overcurrent/overvoltage, emergency protection circuit devices, etc., to reduce system output deviation, compensate conduction voltage difference, reduce The effect of fixed bias

Pending Publication Date: 2022-06-10
NANJING MACROTEST SEMICON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing clamping circuit, a bidirectional diode is directly connected to the feedback operational amplifier. Due to the conduction voltage difference of the diode, this conduction voltage difference makes the clamping have a fixed deviation. The clamping error is generally in the range of 10%, or even higher

Method used

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  • Clamping system and method

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Experimental program
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Embodiment Construction

[0023] When the clamping system of this embodiment is used to clamp the output of the voltage source, a measuring instrument is used to directly measure the output voltage.

[0024] When the clamping system of this embodiment is used to clamp the output of the current source, preferably, the calibration detection module also includes a detection resistor, the detection resistor is connected in series to the output end of the main loop output circuit, and the measuring instrument is connected in parallel to both ends of the detection resistor . like image 3 As shown, the switch S3 is closed, and the voltage of the detection resistor is measured by a measuring instrument to obtain the output current.

[0025] As a preferred example, such as figure 2 As shown, the clamping system of this embodiment also includes a calculation module 10 and a data communication module 11, the input terminal of the calculation module 10 is connected to the output terminal of the calibration mea...

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Abstract

According to the clamping system and method, the clamping precision is improved. The clamping system comprises a differential operational amplifier, a compensation operational amplifier, a single-phase conduction diode, a main loop output circuit and an acquisition circuit, the differential operational amplifier is connected with the compensation operational amplifier, the compensation operational amplifier is connected with the single-phase conduction diode, the single-phase conduction diode is connected with the main loop output circuit, and the acquisition circuit is connected with the main loop output circuit. And the acquisition circuit is connected with the main loop output circuit and the differential operational amplifier. According to the clamping system provided by the embodiment of the invention, the compensation operational amplifier is arranged between the differential operational amplifier and the single conduction diode, so that the conduction voltage difference of the diode can be compensated, the output fixed deviation is reduced, and the clamping precision is improved. According to the clamping method, the correction model is established according to the theoretical output value and the actual output value, the first preset value and the second preset value are corrected through the correction model, the system output deviation is reduced, and the clamping precision is improved.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a clamping system and method. Background technique [0002] Clamping refers to a measure to limit the potential of a certain point to a specified potential. It is an overvoltage protection technology, and clamping is realized by a clamping circuit. In the existing clamping circuit, a bidirectional diode is directly connected to the feedback operational amplifier. Due to the conduction voltage difference of the diode, this conduction voltage difference makes the clamping have a fixed deviation. The clamping error is generally in the range of 10%, or even higher. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a clamping system and method to improve clamping precision. [0004] In order to solve the above technical problems, an embodiment of the present invention provides a clamping system on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04
CPCH02H9/044
Inventor 黄浩李全任
Owner NANJING MACROTEST SEMICON TECH CO LTD