CN203275469U - Switch-type electronic load - Google Patents
Switch-type electronic load Download PDFInfo
- Publication number
- CN203275469U CN203275469U CN 201320299978 CN201320299978U CN203275469U CN 203275469 U CN203275469 U CN 203275469U CN 201320299978 CN201320299978 CN 201320299978 CN 201320299978 U CN201320299978 U CN 201320299978U CN 203275469 U CN203275469 U CN 203275469U
- Authority
- CN
- China
- Prior art keywords
- electronic load
- output terminal
- semiconductor device
- power semiconductor
- switching mode
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to an electronic load testing power supply parameters, and specifically relates to a switch-type electronic load. The switch-type electronic load uses a singlechip chip as a control center. Through a harmonic generator, sawtooth waves are generated, and the sawtooth waves are compared with feedback voltage obtained by proportional integral operation, so as to generate high-frequency PWM waves to control breakover of a MOSFET tube. Then, through adjustment of an error comparator, a closed loop negative feedback control circuit is formed. The switch-type electronic load has excellent precision, stability and dynamic response, and combining accurate software control, speediness and accuracy of power supply measurement are realized.
Description
Technical field
The utility model relates to a kind of electronic load of testing power supply parameter, specifically a kind of switching mode electronic load.
Background technology
Electronic load can the Reality simulation environment in the load of power supply, be used for the testing power supply parameter.The principle of electronic load is to control internal power MOSFET or transistorized conducting amount, consume the equipment of electric energy by the dissipated power of power tube, it can accurately detect load voltage, the accurate adjustment load current, simultaneously can realize the fictitious load short circuit, fictitious load is the resistive and capacitive of perception, and the capacitive load currents rise time etc. are that the debugging of Switching Power Supply detects indispensable testing tool.Traditional electronic load, its metal-oxide-semiconductor works in linear condition, energy form with heat energy on metal-oxide-semiconductor and power resistor dissipates, and the maximum current limit because its metal-oxide-semiconductor dispels the heat and device itself is agreed makes the maximum operating currenbt of traditional electronic load generally below 30A.As Chinese patent " a kind of DC Electronic Loads ", number of patent application is 2011201627036, is exactly a kind of like this equipment electronic load that relies on the dissipated power consumption electric energy of power tube.
Summary of the invention
The purpose of this utility model is to provide the switching mode electronic load that a kind of dissipation energy is large, have good precision, stability and dynamic response.
in order to reach above purpose, the technical scheme that the utility model adopts is: a kind of switching mode electronic load described in the utility model comprises power semiconductor device, be connected to the power dissipation resistance of described power semiconductor device source electrode, it is characterized in that: the grid of described power semiconductor device is connected to the output terminal of power driving circuit, the input end of described power driving circuit is connected with the output terminal that width modulation generates comparer, two signal input parts that described width modulation generates comparer connect respectively the output terminal of harmonic oscillator and the output terminal of sample circuit, the input end of described sample circuit is connected to the source electrode of power semiconductor device.
Described harmonic oscillator is made of operational amplifier chip TL082 and peripheral circuit thereof.
Described power semiconductor device is the metal-oxide layer-semiconductor-field-effect transistor of N raceway groove.
The output terminal of sample circuit is connected to through the proportional integral arithmetical unit signal input part that width modulation generates comparer, and another input end of proportional integral arithmetical unit is connected to the DA current output terminal with the single-chip microcomputer of user interface.
The utility model produces sawtooth wave and makes comparisons through the feedback voltage that the proportional integral computing obtains by harmonic oscillator and generates the conducting that the high-frequency PWM ripple is controlled the MOSFET pipe.The switching mode electronic load has good precision, stability and dynamic response, in conjunction with accurate software control, can realize the quick and accurate of power measurement.
Description of drawings
Fig. 1 is the circuit block diagram of an embodiment of the utility model.
Fig. 2 is the circuit diagram of harmonic oscillator.
Fig. 3 is the circuit block diagram of another embodiment of the utility model.
Embodiment
As shown in Figure 1, a kind of switching mode electronic load described in the utility model, comprise power semiconductor device Q1, be connected to the power dissipation resistance R 1 of described power semiconductor device Q1 source electrode, described power semiconductor device Q1 adopts the metal-oxide layer-semiconductor of N raceway groove-field-effect transistor.Metal-oxide-semiconductor and power dissipation resistance consist of the power circuit of electronic load jointly, realize the speed of electrical source consumption by the shutoff of controlling metal-oxide-semiconductor.The grid of described power semiconductor device Q1 is connected to the output terminal of power driving circuit P, the input end of described power driving circuit P is connected with the output terminal that width modulation generates comparer PWM, two signal input parts that described width modulation generates comparer PWM connect respectively the output terminal of harmonic oscillator S and the output terminal of sample circuit W, and the input end of described sample circuit W is connected to the source electrode of power semiconductor device Q1.
As shown in Figure 2, described harmonic oscillator S is made of operational amplifier chip TL082 and peripheral circuit thereof.
As shown in Figure 3, the output terminal of sample circuit W is connected to through proportional integral arithmetical unit B the signal input part that width modulation generates comparer PWM, and another input end of proportional integral arithmetical unit B is connected to the DA current output terminal I with the single-chip microprocessor MCU of user interface UI.Sampling input voltage V from system's input point is connected to the signals collecting end of single-chip microprocessor MCU through overvoltage crowbar V1.
It is control core that the utility model adopts the single-chip microprocessor MCU with user interface UI, make comparisons by harmonic oscillator S product sawtooth wave with through the feedback voltage that proportional integral arithmetical unit B obtains and generate the conducting that the high-frequency pulsed width modulation ripple is controlled the MOSFET pipe, then the adjusting through error comparator consists of the close loop negative feedback control loop.The switching mode electronic load has good precision, stability and dynamic response, and in conjunction with accurate software control, has realized the quick and accurate of power measurement.
Other each several part circuit that the utility model relates to are known technology, no longer are described in detail at this.
Claims (4)
1. switching mode electronic load, comprise power semiconductor device Q1, be connected to the power dissipation resistance R 1 of described power semiconductor device Q1 source electrode, it is characterized in that: the grid of described power semiconductor device Q1 is connected to the output terminal of power driving circuit P, the input end of described power driving circuit P is connected with the output terminal that width modulation generates comparer PWM, two signal input parts that described width modulation generates comparer PWM connect respectively the output terminal of harmonic oscillator S and the output terminal of sample circuit W, the input end of described sample circuit W is connected to the source electrode of power semiconductor device Q1.
2. a kind of switching mode electronic load according to claim 1, it is characterized in that: described harmonic oscillator S is made of operational amplifier chip TL082 and peripheral circuit thereof.
3. a kind of switching mode electronic load according to claim 1 and 2, is characterized in that: metal-oxide layer-semiconductor that described power semiconductor device Q1 is the N raceway groove-field-effect transistor.
4. a kind of switching mode electronic load according to claim 1 and 2, it is characterized in that: the output terminal of sample circuit W is connected to through proportional integral arithmetical unit B the signal input part that width modulation generates comparer PWM, and another input end of proportional integral arithmetical unit B is connected to the DA current output terminal I with the single-chip microprocessor MCU of user interface UI.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320299978 CN203275469U (en) | 2013-05-28 | 2013-05-28 | Switch-type electronic load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320299978 CN203275469U (en) | 2013-05-28 | 2013-05-28 | Switch-type electronic load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203275469U true CN203275469U (en) | 2013-11-06 |
Family
ID=49505846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320299978 Expired - Fee Related CN203275469U (en) | 2013-05-28 | 2013-05-28 | Switch-type electronic load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203275469U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330595A (en) * | 2014-10-30 | 2015-02-04 | 广东威创视讯科技股份有限公司 | DC (Direct Current) module power supply aged electronic load device used for laser |
| CN104569857A (en) * | 2015-01-21 | 2015-04-29 | 浪潮电子信息产业股份有限公司 | Designing method and testing tool of alternative load meter |
| TWI646319B (en) * | 2017-10-27 | 2019-01-01 | 逢甲大學 | Adjustable nonlinear false load measuring system and method |
| CN112526384A (en) * | 2021-02-09 | 2021-03-19 | 武汉精能电子技术有限公司 | Electronic load circuit |
-
2013
- 2013-05-28 CN CN 201320299978 patent/CN203275469U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330595A (en) * | 2014-10-30 | 2015-02-04 | 广东威创视讯科技股份有限公司 | DC (Direct Current) module power supply aged electronic load device used for laser |
| CN104330595B (en) * | 2014-10-30 | 2017-10-10 | 广东威创视讯科技股份有限公司 | Laser DC Module power source aging electronic load device |
| CN104569857A (en) * | 2015-01-21 | 2015-04-29 | 浪潮电子信息产业股份有限公司 | Designing method and testing tool of alternative load meter |
| TWI646319B (en) * | 2017-10-27 | 2019-01-01 | 逢甲大學 | Adjustable nonlinear false load measuring system and method |
| CN112526384A (en) * | 2021-02-09 | 2021-03-19 | 武汉精能电子技术有限公司 | Electronic load circuit |
| CN112526384B (en) * | 2021-02-09 | 2021-05-18 | 武汉精能电子技术有限公司 | Electronic load circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203275469U (en) | Switch-type electronic load | |
| CN204333898U (en) | A kind of convertible frequency air-conditioner and Intelligent Power Module overcurrent protection Circuit tuning thereof | |
| CN204575774U (en) | There is the programmable electronic load of direct current resistance measuring ability | |
| CN104796003B (en) | For the output current counting circuit of inverse-excitation type pwm converter DCM patterns | |
| CN103775366A (en) | Power supply temperature sampling and fan control circuit and power supply device | |
| CN102156501A (en) | AC-DC (Alternating Current Direct Current) small-current electronic load simulator | |
| CN107333348A (en) | A kind of voltage-stabilizing protection power supply for micro-wave oven | |
| CN201159760Y (en) | Adjustable DC electronic load device | |
| CN203387422U (en) | High-efficiency numerical-control voltage-stabilized power supply | |
| CN202926683U (en) | Power supply temperature sampling and fan controlling circuit and power supply device | |
| CN203025328U (en) | Adjustable active load circuit | |
| CN103792452A (en) | Superimposed alternating voltage test tester for automobile low-voltage electric appliance | |
| CN103698562B (en) | A kind of electronic load device and emulation mode thereof | |
| CN204154856U (en) | Triode amplifies test circuit | |
| CN203707767U (en) | Interface protection circuit of current sensor, control circuit and electric appliance | |
| CN202795112U (en) | Constant-current square wave generating circuit | |
| CN107390029B (en) | Device for eliminating reverse electromotive force during inductive load DCR measurement | |
| CN204287262U (en) | Electronic load device | |
| CN204288035U (en) | A kind of regulated power supply output terminal fictitious load control circuit | |
| CN203645895U (en) | Load sampling circuit of non-isolated LED driving circuit | |
| CN109032234A (en) | The constant-current source device of voltage limit thresholding | |
| CN204887646U (en) | Adjustable low -power consumption LED drive circuit | |
| CN203251236U (en) | A voltage following deep negative feedback constant current source apparatus | |
| CN202502427U (en) | Pulse width modulation constant current source based on single chip microcomputer | |
| CN206992953U (en) | The synchronous rectifying switching power source of current adjustment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20160528 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |