CN105891562A - Direct current electronic load - Google Patents
Direct current electronic load Download PDFInfo
- Publication number
- CN105891562A CN105891562A CN201410764436.8A CN201410764436A CN105891562A CN 105891562 A CN105891562 A CN 105891562A CN 201410764436 A CN201410764436 A CN 201410764436A CN 105891562 A CN105891562 A CN 105891562A
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- CN
- China
- Prior art keywords
- load
- power supply
- tested
- current
- electronic load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Abstract
The present invention discloses a direct current electronic load, the testable range of a power supply to be tested is 0-10V, the setting load current of a control panel arranged by manpower is 0-1A, and the current is able to keep constant when the load works. The power supply cannot directly work when the load does not set parameters, allowable work current is set in advance to effectively protect the electronic load of the power supply to be tested. The direct current electronic load has a function of disconnecting the load and the power supply to be tested, is controlled by a single-chip microcomputer, has an overvoltage protection function, and is able to automatically disconnect when the voltage exceeds 18V.
Description
Technical field
The present invention relates to a kind of DC Electronic Loads, belong to testing power supply properties field.
Background technology
Electronic load i.e. electronics load, is that instead of a kind of tool of the conventional loads such as electric light, motor, heater
Body circuit, in order to test the characteristic of power supply.The electricity obtained from electronic load formal, we
Electronic load can be divided into direct current and exchange two classes, it is also possible to be divided into constant pressure source pattern and constant-current source pattern.
Introduce herein is a kind of field effect transistor utilizing low on-resistance, coordinate high-performance microcontroller, integrated specially
A kind of constant current mode DC Electronic Loads constituted with chip etc., the constant current testing power supply to a certain extent is born
Loading capability.
Summary of the invention
The present invention devises the DC Electronic Loads with following function: testing of tested power supply
Scope is 0-10V, 0-1A；Set manually to one set load current of panel, during loaded work piece
Its electric current can keep constant；Power supply can not on-line operation under loading non-setup parameter, first set permission
Operating current, can be effective；Protect the electronic load of tested power supply；There is load can disconnect with tested power supply
Function, passes through Single-chip Controlling；There is over-voltage protecting function, automatically disconnect when voltage is more than 18V.Use
MSP430 single-chip microcomputer is as key control unit, and this function of the MCU is strong, and compatible good, cost performance is high；
Having volume little, integrated level is high, easily extends, and reliability is high, and power consumption is little and has stronger data process
And operational capability, system operations speed is fast.This scheme can realize intelligentized feature, improves certainty of measurement,
Can utilize software that measurement error is carried out feedback compensation simultaneously.
Accompanying drawing explanation
Fig. 1 is the design frame chart of DC Electronic Loads.
In figure: 1-controller；2-flows over module；3-power controls；4-measure voltage & current；5-A/D
Conversion；6-key-press input；7-display.
Detailed description of the invention
Use microminiature, low-power consumption, 16 A/D converters, there is programmable automation controller on a plate
Device, this A/D can provide from supply voltage to the input range of as little as ± 256mV, it is thus possible to high-resolution
Rate measures signal.In the design, it is contemplated that the feature that field effect transistor controls, constantan wire selects series connection and quilt
Survey between power supply and field effect transistor.Owing to sampled voltage is the least and be again floating ground measurement, so with OP77 pair
Sampled signal carries out differential amplification.Signal after amplification is finally fed to 16 A/D converters
ADS1115IDGSR.Parameter determination: measure when given electric current is 1000mA according to Ohm's law, gathers
Voltage is that 148.93mV is left as 2V owing to A/D changes voltage after range maximum sets amplification into 2.5V
Right.It is adapted and determines that the feedback resistance of OP77 is 13.4K ω.
Claims (1)
1. the tested scope that the invention discloses a kind of tested power supply is a 0-10V, 0-1A；By manually setting
Fixed to one set load current of panel, during loaded work piece, its electric current can keep constant；Power supply can not be
Load on-line operation under non-setup parameter, first set the operating current of permission, can effectively protect tested power supply
Electronic load；Have load with tested power supply can break function, pass through Single-chip Controlling；There is overvoltage protect
Protective function, the DC Electronic Loads automatically disconnected when voltage is more than 18V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410764436.8A CN105891562A (en) | 2014-11-27 | 2014-11-27 | Direct current electronic load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410764436.8A CN105891562A (en) | 2014-11-27 | 2014-11-27 | Direct current electronic load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105891562A true CN105891562A (en) | 2016-08-24 |
Family
ID=56700043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410764436.8A Pending CN105891562A (en) | 2014-11-27 | 2014-11-27 | Direct current electronic load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105891562A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106355981A (en) * | 2016-11-09 | 2017-01-25 | 广西职业技术学院 | Programmable electronic load for analog electronic technique teaching |
| CN108061866A (en) * | 2017-12-11 | 2018-05-22 | 艾乐德电子（南京）有限公司 | Simulate the electronic load device and method of RLC loads |
-
2014
- 2014-11-27 CN CN201410764436.8A patent/CN105891562A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106355981A (en) * | 2016-11-09 | 2017-01-25 | 广西职业技术学院 | Programmable electronic load for analog electronic technique teaching |
| CN108061866A (en) * | 2017-12-11 | 2018-05-22 | 艾乐德电子（南京）有限公司 | Simulate the electronic load device and method of RLC loads |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160824 |