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A self-powered DC voltage measurement control circuit and measurement device

A DC voltage, measurement and control technology, applied in the direction of measuring devices, measuring electrical variables, measuring current/voltage, etc., can solve the problems of increasing system cost and complexity, limiting measurement accuracy and measurement range, and large temperature drift coefficient, etc., to achieve Improve measurement accuracy and measurement range, reduce use cost and space, and reduce the effect of measurement temperature drift

Active Publication Date: 2021-08-13
NINGBO CRRC TIMES TRANSDUCER TECH CO LTD
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Problems solved by technology

At present, the DC voltage measurement device mainly adopts the magnetic balance principle, magnetic modulation principle, photoelectric isolation, digital isolation and other methods to realize the isolated measurement of DC high voltage. These methods need to provide a separate standard power supply; the introduction of the standard power supply will increase the cost of the system and complexity, especially in the transformation of existing sites, it is difficult to increase the standard power supply and power supply connection lines due to structural limitations, which limits the application of this type of sensor
[0003] The current passive DC voltage measuring device has defects such as large temperature drift coefficient and poor mechanical vibration performance, and because the passive DC voltage measuring device adopts a single resistance voltage divider, the current consumption of the oscillation circuit will limit its measurement accuracy and measurement range

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  • A self-powered DC voltage measurement control circuit and measurement device
  • A self-powered DC voltage measurement control circuit and measurement device
  • A self-powered DC voltage measurement control circuit and measurement device

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Embodiment Construction

[0027] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the figure). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

[0029] Such as Figure 1 to Figure 3 As shown, the present invention provides a self-powered DC voltage measurement control circuit, including: a primary side module, which is used to generate a corresponding current signal according to an input high-voltage signal, and output a current signal and an oscillation si...

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Abstract

The invention provides a self-powered DC voltage measurement control circuit and a measurement device, which belong to the technical field of voltage measurement, including a primary side module, which is used to generate a corresponding current signal according to an input high-voltage signal, and output a current signal and an oscillation signal; The voltage module is connected with the primary side module, and converts the high voltage signal into a low voltage signal according to the oscillation signal; the output module is connected with the voltage transformation module, and is used to output the low voltage signal after rectification and filtering. A self-powered DC voltage measurement control circuit provided by the present invention adopts a dual voltage divider circuit and supplies power to the oscillation circuit separately through the second voltage divider circuit, realizing the self-power supply function without additional external power supply, greatly reducing the use cost and At the same time, it also avoids the impact of the current consumption of the oscillation circuit on the overall measurement accuracy and measurement range, and improves the measurement accuracy and measurement range.

Description

technical field [0001] The invention belongs to the technical field of voltage measurement, in particular to a self-powered DC voltage measurement control circuit and a measurement device. Background technique [0002] In the application of high-power DC power supply, the system needs to isolate, measure and control the DC high voltage. At present, the DC voltage measurement device mainly adopts the magnetic balance principle, magnetic modulation principle, photoelectric isolation, digital isolation and other methods to realize the isolated measurement of DC high voltage. These methods need to provide a separate standard power supply; the introduction of the standard power supply will increase the cost of the system And complexity, especially in the transformation of the existing site, it is difficult to increase the standard power supply and power supply connection lines due to structural limitations, which limits the application of this type of sensor. [0003] The curren...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/00
CPCG01R19/0084
Inventor 刘家豪郑民郑良广郑华雄任浩
Owner NINGBO CRRC TIMES TRANSDUCER TECH CO LTD
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