CN203084128U - Portable intelligent direct-current electronic load device - Google Patents
Portable intelligent direct-current electronic load device Download PDFInfo
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- CN203084128U CN203084128U CN 201320111681 CN201320111681U CN203084128U CN 203084128 U CN203084128 U CN 203084128U CN 201320111681 CN201320111681 CN 201320111681 CN 201320111681 U CN201320111681 U CN 201320111681U CN 203084128 U CN203084128 U CN 203084128U
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Abstract
The utility model relates to a portable intelligent direct-current electronic load device, which comprises a central processing unit, a display unit, a key unit, a PI (Proportional-Integral) regulation unit, an MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) driving unit, a communication unit and a power supply unit. The display unit, the key unit, the communication unit and the PI regulation unit are respectively connected with the central processing unit. The output end of the PI regulation unit is connected with the control end of the MOSFET driving unit. The output end of the MOSFET driving unit is connected with electronic equipment to be tested. The MOSFET driving unit is provided with a voltage and current sampling circuit. The output end of the voltage and current sampling circuit not only is connected with the input end of the PI regulation unit, but also is connected with the central processing unit. The portable intelligent direct-current electronic load device can realize constant-voltage, constant-current, constant-resistance and constant-power working modes by controlling the PI regulation unit through the key unit or an upper computer, so that the multi-aspect demands of the electronic equipment to be tested are met.
Description
Technical field
The utility model relates to a kind of load device, relates in particular to a kind of portable intelligent DC electronic load device.
Background technology
In the application of electronic technology field, often will be to Switching Power Supply, linear power supply, the UPS power supply, transformer, electronic equipment such as battery or charger is tested, generally all adopt resistance in traditional method of testing, rheochord, resistance boxes etc. serve as test load, but these loads can not be satisfied us to the many-sided requirement of load, as: the load of steady current, the load of band output interface, the load of regulated at will, the load of permanent power, dynamic load, therefore the loads of many output ports etc. also can't be carried out reliably the output characteristics of some electronic equipments, comprehensive and simple, test efficiently.
Summary of the invention
The utility model mainly solves original employing resistance, rheochord or resistance box and serves as the electronic equipment test load, can't carry out reliably the output characteristics of some electronic equipments, comprehensively and simply, the technical matters of test efficiently; A kind of portable intelligent DC electronic load device is provided, it can be operated in pattern that sets and the parameter state that sets, realize constant voltage, steady current, constant resistance and firm power mode of operation, can carry out reliably the output characteristics of some electronic equipments, comprehensively and simply, test efficiently.
Above-mentioned technical matters of the present utility model is mainly solved by following technical proposals: the utility model comprises CPU (central processing unit), display unit, push-button unit, the PI regulon, MOSFET driver element and the power supply unit that operating voltage is provided for whole portable intelligent DC electronic load device, display unit, push-button unit links to each other with described CPU (central processing unit) respectively with the PI regulon, the output terminal of PI regulon links to each other with the control end of MOSFET driver element, the output terminal of MOSFET driver element links to each other with electronic equipment to be measured, the MOSFET driver element is provided with the electric current and voltage sample circuit, the output terminal of electric current and voltage sample circuit both linked to each other with the input end of PI regulon, linked to each other with described CPU (central processing unit) again.CPU (central processing unit) receives the order and the data of push-button unit setting and handles, the output voltage current setting value is given the PI regulon, the electric current and voltage sample circuit is captured in the electric current and voltage on the MOSFET driving circuit in real time, the measured value of electric current and voltage is also given the PI regulon, the measured value of electric current and voltage send display unit to show after central processing unit for processing simultaneously, the PI regulon is setting value and measured value relatively, output signal is controlled the conducting of MOSFET pipe in the MOSFET driver element and is ended, thereby makes electronic load device be operated in the setting pattern.By the control of PI regulon, realize constant voltage, steady current, constant resistance and firm power mode of operation, can carry out reliably the output characteristics of some electronic equipments, comprehensively and simply, test efficiently.
As preferably, be connected with the D/A converting unit between described CPU (central processing unit) and the described PI regulon, the input end of D/A converting unit links to each other with described CPU (central processing unit), and the normal voltage input end of the output terminal of D/A converting unit and described PI regulon links to each other.The D/A converting unit is changed the setting value of CPU (central processing unit) output, flows to the PI regulon again.
As preferably, be connected with the A/D converting unit between the output terminal of described CPU (central processing unit) and described electric current and voltage sample circuit, the input end of A/D converting unit links to each other with the output terminal of described voltage sampling circuit and current sampling circuit, and the output terminal of A/D converting unit links to each other with described CPU (central processing unit).The electric current and voltage value of electric current and voltage sample circuit collection flows to CPU (central processing unit) again through the conversion of A/D converting unit.
As preferably, described portable intelligent DC electronic load device comprises communication unit, and described CPU (central processing unit) links to each other with communication unit, and communication unit links to each other with host computer.By communication unit, electronic load device can receive order and the data that host computer sends over, and is operated in host computer according to the notice of host computer and sets under the mode of operation, uses more convenient and flexible.
As preferably, described communication unit is that serial ports changes usb interface unit, and serial ports links to each other with described CPU (central processing unit), and USB interface links to each other with described host computer.Communication is easy to connect, can also charge to charged lithium cells by this USB interface.
As preferably, described MOSFET driver element is connected with over-voltage over-current protection circuit.Work is safety and reliable more.
As preferably, described display unit and described push-button unit adopt liquid crystal touch screen.Compact conformation, easy to operate, show clear.
As preferably, described CPU (central processing unit) adopts the MSP430F149 single-chip microcomputer.It is convenient to realize, performance is more reliable.
As preferably, described power supply unit is powered by charged lithium cells.Easy to carry.
The beneficial effects of the utility model are: can be operated in pattern that sets and the parameter state that sets according to the control command that push-button unit is set or host computer sends, realize constant voltage, steady current, constant resistance and firm power mode of operation by the PI regulon, thereby can satisfy the many-sided requirement of tested electronic equipment, to the output characteristics of electronic equipment carry out reliably, comprehensively and simply, test efficiently.
Description of drawings
Fig. 1 is a kind of circuit theory syndeton block diagram of the present utility model.
1. CPU (central processing unit) among the figure, 2. display unit, 3. push-button unit; 4.PI regulon; 5.MOSFET driver element, 6. power supply unit, 7. electric current and voltage sample circuit; 8.D/A converting unit; 9.A/D converting unit, 10. communication unit, 11. over-voltage over-current protection circuits; 20. electronic equipment to be measured, 21. host computers.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: the portable intelligent DC electronic load device of present embodiment, as shown in Figure 1, comprise CPU (central processing unit) 1, display unit 2, push-button unit 3, D/A converting unit 8, A/D converting unit 9, PI regulon 4, MOSFET driver element 5, communication unit 10 and the power supply unit 6 that operating voltage is provided for whole portable intelligent DC electronic load device.Display unit 2, push-button unit 3 and communication unit 10 link to each other with CPU (central processing unit) 1 respectively, in the present embodiment, display unit 2 and push-button unit 3 adopt liquid crystal touch screen to realize, communication unit 10 adopts serial ports to change usb interface unit, serial ports links to each other with CPU (central processing unit) 1, and USB interface links to each other with host computer 21.The input end of D/A converting unit 8 links to each other with CPU (central processing unit) 1; the normal voltage input end of the output terminal of D/A converting unit 8 and PI regulon 4 links to each other; the output terminal of PI regulon 4 links to each other with the control end of MOSFET driver element 5; the output terminal of MOSFET driver element 5 links to each other with electronic equipment 20 to be measured; be connected with electric current and voltage sample circuit 7 and over-voltage over-current protection circuit 11 on the MOSFET driver element 5; the output terminal of electric current and voltage sample circuit 7 both linked to each other with the input end of PI regulon 4; input end with A/D converting unit 9 links to each other again, and the output terminal of A/D converting unit 9 links to each other with CPU (central processing unit) 1.In the present embodiment, CPU (central processing unit) 1 adopts the MSP430F149 single-chip microcomputer, and single-chip microcomputer is realized software overcurrent protection, battery voltage detection and over-voltage and over-current warning function by port arrangement.D/A converting unit 8 adopts the quick twoport D/A converter of 12 high precision of TLV5618 serial input, and A/D converting unit 9 adopts the TLV2542A/D conversion chip.Power supply unit 6 is by charged lithium cells power supply, adopts by the CS5171 SEPIC circuit that adjuster constitutes that boosts and boosts to 8V, adopt again three LM2596-ADJ stabilivolts be converted to electronic load device required voltage ± 5V and+3.3V.Adopt the linear lithium ion cell charging chip of TP4054, charging voltage is taken from USB interface.The TP4054 chip is the single-unit charger for lithium ion battery of a employing steady current/constant voltage algorithm, it can provide the charging current of 800mA and an inner P channel power MOS FET to manage and the thermal conditioning circuit, need not isolating diode or foreign current and detects resistor.
The PI regulon is a kind of linear controller, and it constitutes control deviation according to set-point and actual value, and the ratio and the integration of deviation constituted controlled quentity controlled variable by linear combination, and controlled device is controlled.The core essence of electronic load device is a negative feedback control loop that electric current and voltage sampling PI regulon is formed, also be the power control circuit of electronic load device, MOSFET pipe here both as the control device of electric current simultaneously also as the load of tested power supply.Under steady current, constant resistance, constant power-mode, the PI regulon with the voltage drop on the current sampling resistor in the electric current and voltage sample circuit with compare by the given voltage setting value of monolithic processor controlled D/A converting unit, in the control MOSFET driver element conducting of MOSFET pipe with end, thereby reach the constant purpose of holding current.Under constant-voltage mode, the PI regulon with the ohmically voltage drop of voltage sample in the electric current and voltage sample circuit with compare by the given voltage setting value of monolithic processor controlled D/A converting unit, reach the purpose of system's constant voltage.
The course of work: the set information of single-chip microcomputer wait liquid crystal touch screen or order and the data that host computer sends are also handled, start the D/A converting unit and produce voltage setting value, start A/D converting unit real-time sampling and fall voltage on the MOSFET driving circuit, sampled data is handled in real time and the brilliant touch-screen of liquor charging shows in real time or sends host computer to.Illustrate: when the user selects the steady current mode of operation, and when require setting electric current and being 2.000A, then single-chip microcomputer should be 0.5V by calculating the voltage that can get on the sampling resistor, single-chip microcomputer starts the D/A converting unit and produces the setting voltage value of 0.5V to the PI regulon, the PI regulon is setting value and actual value relatively, the output control MOSFET drive circuit works of PI regulon is under constant current mode, and the electric current of maintenance electronic load device remains on 2.000A in the input voltage adjustable extent.
The utility model can be operated in pattern that sets and the parameter state that sets according to the control command that push-button unit is set or host computer sends, realize constant voltage, steady current, constant resistance and firm power mode of operation by the PI regulon, thereby can satisfy the many-sided requirement of tested electronic equipment, to the output characteristics of electronic equipment carry out reliably, comprehensively and simply, test efficiently.
Above-described embodiment is a kind of preferred version of the present utility model, is not the utility model is done any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim puts down in writing.
The content that is not described in detail in this instructions belongs to the those skilled in the art known prior art.
Claims (9)
1. portable intelligent DC electronic load device, it is characterized in that comprising CPU (central processing unit) (1), display unit (2), push-button unit (3), PI regulon (4), MOSFET driver element (5) and the power supply unit (6) that operating voltage is provided for whole portable intelligent DC electronic load device, display unit (2), push-button unit (3) links to each other with described CPU (central processing unit) (1) respectively with PI regulon (4), the output terminal of PI regulon (4) links to each other with the control end of MOSFET driver element (5), the output terminal of MOSFET driver element (5) links to each other with electronic equipment to be measured (20), MOSFET driver element (5) is provided with electric current and voltage sample circuit (7), the output terminal of electric current and voltage sample circuit (7) both linked to each other with the input end of PI regulon (4), linked to each other with described CPU (central processing unit) (1) again.
2. portable intelligent DC electronic load device according to claim 1, it is characterized in that being connected with D/A converting unit (8) between described CPU (central processing unit) (1) and the described PI regulon (4), the input end of D/A converting unit (8) links to each other with described CPU (central processing unit) (1), and the output terminal of D/A converting unit (8) links to each other with the normal voltage input end of described PI regulon (4).
3. portable intelligent DC electronic load device according to claim 1, it is characterized in that being connected with A/D converting unit (9) between the output terminal of described CPU (central processing unit) (1) and described electric current and voltage sample circuit (7), the input end of A/D converting unit (9) links to each other with the output terminal of described electric current and voltage sample circuit (7), and the output terminal of A/D converting unit (9) links to each other with described CPU (central processing unit) (1).
4. according to claim 1 or 2 or 3 described portable intelligent DC electronic load devices, it is characterized in that comprising communication unit (10), described CPU (central processing unit) (1) links to each other with communication unit (10), and communication unit (10) links to each other with host computer (21).
5. portable intelligent DC electronic load device according to claim 4, it is characterized in that described communication unit (10) changes usb interface unit for serial ports, serial ports links to each other with described CPU (central processing unit) (1), and USB interface links to each other with described host computer (21).
6. according to claim 1 or 2 or 3 described portable intelligent DC electronic load devices, it is characterized in that described MOSFET driver element (5) is connected with over-voltage over-current protection circuit (11).
7. according to claim 1 or 2 or 3 described portable intelligent DC electronic load devices, it is characterized in that described display unit (2) and described push-button unit (3) adopt liquid crystal touch screen.
8. according to claim 1 or 2 or 3 described portable intelligent DC electronic load devices, it is characterized in that described CPU (central processing unit) (1) adopts the MSP430F149 single-chip microcomputer.
9. according to claim 1 or 2 or 3 described portable intelligent DC electronic load devices, it is characterized in that described power supply unit (6) powered by charged lithium cells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320111681 CN203084128U (en) | 2013-03-12 | 2013-03-12 | Portable intelligent direct-current electronic load device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320111681 CN203084128U (en) | 2013-03-12 | 2013-03-12 | Portable intelligent direct-current electronic load device |
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| CN203084128U true CN203084128U (en) | 2013-07-24 |
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| CN 201320111681 Expired - Fee Related CN203084128U (en) | 2013-03-12 | 2013-03-12 | Portable intelligent direct-current electronic load device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487767A (en) * | 2013-09-11 | 2014-01-01 | 深圳市九洲电器有限公司 | Load driving circuit and electronic load |
| CN106501170A (en) * | 2016-12-02 | 2017-03-15 | 天津哈德韦尔自控技术有限公司 | Intelligent portable reference electrode |
| CN108168385A (en) * | 2018-03-20 | 2018-06-15 | 中国工程物理研究院化工材料研究所 | There is the high current constant current tester for loading Auto-matching |
| CN108680848A (en) * | 2018-06-14 | 2018-10-19 | 山东阅芯电子科技有限公司 | Second grade power circulation test method and device |
| CN108776244A (en) * | 2018-07-25 | 2018-11-09 | 易事特集团股份有限公司 | Electronic load |
| CN109507506A (en) * | 2018-11-19 | 2019-03-22 | 珠海格力电器股份有限公司 | Direct current appliance control method and direct current appliance |
| CN109655763A (en) * | 2018-12-07 | 2019-04-19 | 武汉精能电子技术有限公司 | The control method and circuit of constant voltage mode DC Electronic Loads |
| CN110967548A (en) * | 2018-09-29 | 2020-04-07 | 株洲中车时代电气股份有限公司 | Program-controlled variable resistor device with current detection function and working method |
| CN112526275A (en) * | 2020-12-21 | 2021-03-19 | 中认英泰检测技术有限公司 | Self-adaptive electrical parameter testing system and method for quality safety monitoring |
-
2013
- 2013-03-12 CN CN 201320111681 patent/CN203084128U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103487767A (en) * | 2013-09-11 | 2014-01-01 | 深圳市九洲电器有限公司 | Load driving circuit and electronic load |
| CN103487767B (en) * | 2013-09-11 | 2016-08-17 | 深圳市九洲电器有限公司 | A kind of load driving circuits and electronic load |
| CN106501170A (en) * | 2016-12-02 | 2017-03-15 | 天津哈德韦尔自控技术有限公司 | Intelligent portable reference electrode |
| CN108168385A (en) * | 2018-03-20 | 2018-06-15 | 中国工程物理研究院化工材料研究所 | There is the high current constant current tester for loading Auto-matching |
| CN108168385B (en) * | 2018-03-20 | 2023-07-07 | 中国工程物理研究院化工材料研究所 | Heavy current constant current tester with load automatic matching function |
| CN108680848A (en) * | 2018-06-14 | 2018-10-19 | 山东阅芯电子科技有限公司 | Second grade power circulation test method and device |
| CN108776244A (en) * | 2018-07-25 | 2018-11-09 | 易事特集团股份有限公司 | Electronic load |
| CN110967548A (en) * | 2018-09-29 | 2020-04-07 | 株洲中车时代电气股份有限公司 | Program-controlled variable resistor device with current detection function and working method |
| CN109507506A (en) * | 2018-11-19 | 2019-03-22 | 珠海格力电器股份有限公司 | Direct current appliance control method and direct current appliance |
| CN109655763A (en) * | 2018-12-07 | 2019-04-19 | 武汉精能电子技术有限公司 | The control method and circuit of constant voltage mode DC Electronic Loads |
| CN109655763B (en) * | 2018-12-07 | 2021-07-06 | 武汉精能电子技术有限公司 | Control method and circuit of constant voltage mode direct current electronic load |
| CN112526275A (en) * | 2020-12-21 | 2021-03-19 | 中认英泰检测技术有限公司 | Self-adaptive electrical parameter testing system and method for quality safety monitoring |
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| 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: 20130724 Termination date: 20140312 |