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Voltage measurement method and application device thereof

A voltage measurement and sampling voltage technology, which is applied in the field of measurement and control, can solve the problems of sampling resistor resistance deviation, sampling voltage inaccuracy, and difficulty in meeting practical application requirements, so as to avoid resistance deviation and improve accuracy.

Pending Publication Date: 2021-11-23
SUNGROW POWER SUPPLY CO LTD
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Problems solved by technology

[0004] However, the inventors found that in practical applications, there is inevitably a certain deviation in the resistance value of the sampling resistor in the sampling circuit, resulting in inaccurate sampling voltage based on the sampling ratio, which in turn affects the accuracy of the voltage unbalance of the medium-voltage inverter. control, it is difficult to meet the actual application requirements

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  • Voltage measurement method and application device thereof
  • Voltage measurement method and application device thereof
  • Voltage measurement method and application device thereof

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Embodiment Construction

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0054] The voltage measurement method provided by the embodiment of the present invention can be applied to electronic equipment, and the electronic equipment can be an electronic equipment capable of acquiring data and executing a corresponding control program, such as a single-chip microcomputer, a microcontroller, and a DSP. see figure 2 , figure 2 It is a flow chart of a voltage measurement method provided by an embodiment of the present invention. The flow of the voltage measurement...

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Abstract

The invention provides a voltage measurement method and an application device thereof, and is applied to the technical field of measurement and control. The method comprises the following steps: firstly, obtaining the current sampling voltage and the actual sampling proportion of a sampling circuit, and then calculating the current working voltage of a circuit to be measured according to the obtained current sampling voltage and the actual sampling proportion. According to the voltage measurement method provided by the invention, the actual sampling proportion is calculated based on the verification sampling voltage of the sampling circuit when the to-be-measured circuit outputs the verification working voltage and the verification working voltage, and the sampling proportion is not calculated depending on the resistance value of the sampling resistor, and thus the influence of resistance value deviation can be avoided and the accuracy of voltage measurement is further improved.

Description

technical field [0001] The invention relates to the technical field of measurement and control, in particular to a voltage measurement method and an application device thereof. Background technique [0002] In many application scenarios, the measurement of circuit operating voltage has extremely high precision requirements, and it is necessary to control the error of voltage measurement within a very small range, so as to figure 1 Taking the medium-voltage inverter shown as an example, the secondary winding of the rectifier transformer is connected with a cascaded power conversion unit, and the power load is supplied through the cascaded power conversion unit. Due to the fact that the secondary winding of the rectifier transformer often has unbalanced impedance in practical applications, the output voltage of the cascaded power conversion unit is unbalanced. In order to know the unbalanced degree of the output voltage, it is necessary to perform a Measurement. [0003] fur...

Claims

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Application Information

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IPC IPC(8): G01R19/00
CPCG01R19/0084
Inventor 吴刚
Owner SUNGROW POWER SUPPLY CO LTD
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