Isolation type numerical control constant-current source module

A constant current source module and isolated technology, which is applied in the field of signal isolation, can solve the problems of lack of isolation function, complicated wiring, and low cost performance, and achieve the effects of saving cost and space, wide voltage application range, and low price

Pending Publication Date: 2019-12-03
赵明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Does not have the isolation function;
[0004] 2. The wiring is complicated and the volume is large, which is not conducive to integration;
[0005] 3. Low price / performance ratio

Method used

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  • Isolation type numerical control constant-current source module
  • Isolation type numerical control constant-current source module
  • Isolation type numerical control constant-current source module

Examples

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Embodiment

[0040] Example: Reference figure 2 The schematic diagram of the top-level circuit of an isolated numerical control constant current source module is shown, which includes a digital signal isolation unit, a small signal amplification unit, a core processing unit, a current adjustment and voltage stabilization unit, and a sampling unit. The description is as follows:

[0041] The GND1 port of the digital signal isolation unit, the GND port of the core processing unit, the GND port of the small signal amplifying unit, the GND port of the current adjustment voltage stabilization unit and the Iin port of the sampling unit are connected together, and the current adjustment voltage stabilization unit The Vin port of the target device is connected to the power output positive port of the target device, the VCC port is connected to the VCC1 port of the digital signal isolation unit, the VDD port is connected to the VDD port of the core processing unit and the VDD port of the small sign...

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PUM

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Abstract

The invention, which belongs to the technical field of signal isolation transmission, relates to an isolation type numerical control constant-current source module comprising a digital signal isolation unit, a small signal amplification unit, a core processing unit, a current adjustment and voltage stabilization unit and a sampling unit. The digital signal isolation unit is responsible for carrying out electrical isolation on source equipment and a digital communication link of the isolation type numerical control constant-current source module. The small signal amplification unit amplifies asampling signal. The core processing unit is responsible for outputting a PWM signal to control the current adjustment and voltage stabilization unit to generate a current matching a set value. The current adjustment and voltage stabilization unit steals energy from the target equipment and adjusts the current returned to the target equipment. The sampling unit samples the current returned to thetarget equipment. According to the invention, the signal isolation circuit and the transmitter can work normally without an independent power supply. The circuit structure is simple; the integration is easy to realize; and production becomes convenient.

Description

technical field [0001] The invention relates to the field of signal isolation, in particular to an isolated numerically controlled constant current source module. Background technique [0002] At present, many industrial sites involve the use of 4~20mA DC current, and many laboratories also involve the use of constant current sources, and the equipment used does not have the output capability of 4~20mA signals, and requires external dedicated The DA module controls the DA module to generate the required current through digital communication; and the signal isolators currently on the market generally have the following problems: [0003] 1. Does not have the isolation function; [0004] 2. The wiring is complicated and the volume is large, which is not conducive to integration; [0005] 3. Low price / performance ratio. Contents of the invention [0006] Aiming at the above problems existing in the prior art, the present invention proposes an isolated numerical control con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCG05F1/56
Inventor 赵明
Owner 赵明
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