CN204216782U - High power DC electronic load - Google Patents
High power DC electronic load Download PDFInfo
- Publication number
- CN204216782U CN204216782U CN201420505194.6U CN201420505194U CN204216782U CN 204216782 U CN204216782 U CN 204216782U CN 201420505194 U CN201420505194 U CN 201420505194U CN 204216782 U CN204216782 U CN 204216782U
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- circuit
- arm controller
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- igbt
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Abstract
The utility model relates to a kind of high power DC electronic load, comprises DC supply input, current transformer, voltage transformer, 3 road power digital circuits, 3 tunnel IGBT drive circuit and ARM controller.Power digital circuit comprises IGBT and energy consumption resistor, and IGBT and energy consumption resistor are connected in series.ARM controller comprises current detection circuit, voltage detecting circuit, 3 road PWM control output circuits, temperature sensing circuit, button input interface, outputting circuit for relay and communication interface circuit.Load on 3 road power digital circuits in parallel after the inductance of DC supply input reception direct current signal through connecting in circuit and electric capacity in parallel.The beneficial effects of the utility model are: take arm processor as main control chip, the mode of operation of constant voltage, constant current, constant-resistance, invariable power can be realized, adopt electronic power switch technology, point three sections of controls, ensure large dynamic conditioning scope, adopt PWM modulation technology to obtain meticulousr adjustment of load amount.
Description
Technical field
The utility model relates to electric and electronic technical field, particularly a kind of high power DC energy consumption type electronic load.
Background technology
At present, small power DC electronic load has many manufacturers to produce product that is a large amount of, technology maturation due to the demand in market, unit high power DC electronic load becomes more complicated relative to the control of small power DC electronic load, is difficult to realize level and smooth, meticulous control.And high power DC electronic load is along with the development of producing, live, demand gets more and more; Except the test request of the large power supply such as electric automobile, charging pile, the micro-capacitance sensor construction of energy resource system is also badly in need of high-power electronic load.Micro-capacitance sensor construct and implement be all hundreds of kilowatt to MW class, and the load adjustment of micro-capacitance sensor all needs the high-power electronic load of tens kilowatts, and high-power electronic load product mostly in the market is less than 10 kilowatts.
Summary of the invention
In view of this, be necessary the DC Electronic Loads providing a kind of single-machine capacity can reach 50 kilowatts, adopt the version of 3 road power digital circuit parallel connections to solve level and smooth, the meticulous control problem of high power DC electronic load.
A kind of high power DC electronic load, main circuit comprises DC supply input, the inductance summation current transformer of connecting with direct-flow input end, the electric capacity in parallel with direct-flow input end and voltage transformer, the 3 road power digital circuits in parallel with direct-flow input end; Control circuit comprises ARM controller and 3 tunnel IGBT drive circuit; Current transformer in main circuit is connected with the current detection circuit in ARM controller, voltage transformer in main circuit is connected with the voltage detecting circuit in ARM controller, 3 road PWM in ARM controller control output circuit and are connected with 3 tunnel IGBT drive circuit respectively, and 3 tunnel IGBT drive circuit are connected with 3 road power digital circuits respectively.
Described power digital circuit comprises IGBT and energy consumption resistor, and IGBT and energy consumption resistor are connected in series; Described ARM controller comprises current detection circuit, voltage detecting circuit, 3 road PWM control output circuits, temperature sensing circuit, button input interface, outputting circuit for relay and communication interface circuit; Load on 3 road power digital circuits in parallel after the inductance of described DC supply input reception direct current signal through connecting in circuit and electric capacity in parallel; Described current transformer is connected between DC supply input and inductance, the current signal detected is sent into the current detection circuit in ARM controller; Described voltage transformer is parallel to electric capacity two ends, the voltage signal detected is sent into the voltage detecting circuit in ARM controller; In described ARM controller, 3 road PWM control output circuits are connected with 3 tunnel IGBT drive circuit respectively, and pwm control signal is delivered to IGBT drive circuit; 3 described tunnel IGBT drive circuit are connected to 3 road power digital circuits respectively, and the IGBT controlled in 3 road power digital circuits opens or closes.
Described DC Electronic Loads, after DC supply input, an inductance of connecting, an electric capacity in parallel.
3 described road power digital circuits are connected in parallel, and control being switched on or switched off of 3 sections of resistance respectively by 3 IGBT, and the resistance size of 3 sections of resistance is pressed 16:4:1 and formed.
The beneficial effects of the utility model are: take arm processor as main control chip, the mode of operation of constant voltage, constant current, constant-resistance, invariable power can be realized, electronic load has the pure linear characteristic of direct current, adopt electronic power switch technology, divide three sections of controls, ensure large dynamic conditioning scope, PWM modulation technology is adopted to obtain meticulousr adjustment of load amount, Modular Structure Design, can form more high power load with wired in parallel mode or cabinet parallel way, the multiple communication technology can meet the networking application of flexibility and reliability.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of the utility model execution mode.
Embodiment
As shown in Figure 1, a kind of high power DC electronic load, the 3 road power digital circuits that main circuit comprises DC supply input, series inductance, shunt capacitance, current transformer, voltage transformer and is connected in parallel.Control circuit comprises ARM controller and 3 tunnel IGBT drive circuit.Described power digital circuit comprises IGBT and energy consumption resistor, and IGBT and energy consumption resistor are connected in series; The control circuit of ARM controller comprises current detection circuit, voltage detecting circuit, 3 road PWM control output circuits, temperature sensing circuit, button input interface, outputting circuit for relay and communication interface circuit; 3 described road PWM control output circuit and are connected with 3 tunnel IGBT drive circuit respectively, and pwm control signal is delivered to IGBT drive circuit; Described IGBT drive circuit is connected to 3 road power digital circuits respectively, and the IGBT controlled in 3 road power digital circuits opens or closes.
As shown in Figure 1,3 described road power digital circuits are connected in parallel, and control being switched on or switched off of 3 sections of resistance respectively by 3 IGBT, and the resistance size of 3 sections of resistance is pressed 16:4:1 and formed.
In described electronic load, when direct current signal by direct-flow input end through inductance, capacitive load on main circuit, current value in circuit is sent in ARM controller through current transformer and current detection circuit, and the magnitude of voltage in circuit is sent in ARM controller through voltage transformer and voltage detecting circuit; The set point of the mode of operation that ARM controller is arranged according to communication interface and electric current, voltage, pwm control signal is calculated by corresponding control algolithm, this control signal controls output circuit through 3 road PWM and delivers to 3 tunnel IGBT drive circuit, IGBT drive circuit controls the IGBT break-make in 3 road power digital circuits respectively, corresponding energy consumption resistor is switched on or switched off, reaches control object.
As shown in Figure 1, described button input interface connects outer button, by the action launching of button or the work of halt circuit.The temperature sensor signal of energy consumption resistor periphery is sent in ARM controller by described temperature sensing circuit, when the temperature value detected is higher than set point, by described outputting circuit for relay, starts the temperature that external fan reduces energy consumption resistor periphery.
Other each several part circuit that the utility model relates to are known technology, no longer describe in detail at this.
Claims (4)
1. a high power DC electronic load, is characterized in that: main circuit comprises DC supply input, the inductance summation current transformer of connecting with direct-flow input end, the electric capacity in parallel with direct-flow input end and voltage transformer, the 3 road power digital circuits in parallel with direct-flow input end; Control circuit comprises ARM controller and 3 tunnel IGBT drive circuit; Current transformer in main circuit is connected with the current detection circuit in ARM controller, voltage transformer in main circuit is connected with the voltage detecting circuit in ARM controller, 3 road PWM in ARM controller control output circuit and are connected with 3 tunnel IGBT drive circuit respectively, and 3 tunnel IGBT drive circuit are connected with 3 road power digital circuits respectively.
2. a kind of high power DC electronic load according to claim 1, it is characterized in that: described power digital circuit comprises IGBT and energy consumption resistor, IGBT and energy consumption resistor are connected in series; Described ARM controller comprises current detection circuit, voltage detecting circuit, 3 road PWM control output circuits, temperature sensing circuit, button input interface, outputting circuit for relay and communication interface circuit; Load on 3 road power digital circuits in parallel after the inductance of described DC supply input reception direct current signal through connecting in circuit and electric capacity in parallel; Described current transformer is connected between DC supply input and inductance, the current signal detected is sent into the current detection circuit in ARM controller; Described voltage transformer is parallel to electric capacity two ends, the voltage signal detected is sent into the voltage detecting circuit in ARM controller; In described ARM controller, 3 road PWM control output circuits are connected with 3 tunnel IGBT drive circuit respectively, and pwm control signal is delivered to IGBT drive circuit; 3 described tunnel IGBT drive circuit are connected to 3 road power digital circuits respectively, and the IGBT controlled in 3 road power digital circuits opens or closes.
3. a kind of high power DC electronic load according to claim 1, is characterized in that: after DC supply input, an inductance of connecting, an electric capacity in parallel.
4. a kind of high power DC electronic load according to claim 1, is characterized in that: 3 described road power digital circuits are connected in parallel, and control being switched on or switched off of 3 sections of resistance respectively by 3 IGBT, and the resistance size of 3 sections of resistance is pressed 16:4:1 and formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420505194.6U CN204216782U (en) | 2014-09-03 | 2014-09-03 | High power DC electronic load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420505194.6U CN204216782U (en) | 2014-09-03 | 2014-09-03 | High power DC electronic load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204216782U true CN204216782U (en) | 2015-03-18 |
Family
ID=52985415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420505194.6U Expired - Fee Related CN204216782U (en) | 2014-09-03 | 2014-09-03 | High power DC electronic load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204216782U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508271A (en) * | 2017-08-29 | 2017-12-22 | 安徽三和电力技术有限公司 | Overload spike formula absorption plant |
-
2014
- 2014-09-03 CN CN201420505194.6U patent/CN204216782U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508271A (en) * | 2017-08-29 | 2017-12-22 | 安徽三和电力技术有限公司 | Overload spike formula absorption plant |
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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: 20150318 Termination date: 20160903 |
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| CF01 | Termination of patent right due to non-payment of annual fee |