CN203414545U - Human-computer interaction multifunctional direct current electronic load device - Google Patents
Human-computer interaction multifunctional direct current electronic load device Download PDFInfo
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- CN203414545U CN203414545U CN201320526175.7U CN201320526175U CN203414545U CN 203414545 U CN203414545 U CN 203414545U CN 201320526175 U CN201320526175 U CN 201320526175U CN 203414545 U CN203414545 U CN 203414545U
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Abstract
The utility model provides a human-computer interaction multifunctional direct current electronic load device which belongs to the field of electronic instruments. The device is composed of a main circuit, a direct current electronic load controller, a control and display panel and an auxiliary power supply. The direct current electronic load controller uses a step iterative control policy, an overvoltage control policy and an overcurrent control policy, thus the work current of the whole direct current electronic load device is precise and adjustable, and a self-recovery overvoltage and overcurrent protection function is realized. A switch tube which is a key component in the device is in a switch work state, and has the advantages of small loss, small heat value and small required heat radiator, thus the volume of the whole direct current electronic load device can be greatly reduced.
Description
Technical field
The utility model relates to the electronic device category under instrument measurement field.
Background technology
In the design and production run of electronic product, all need to carry out necessary performance test with specific load.Electronic load is with electron device, to realize a kind of circuit of loading functional, electronic load in the market mostly adopts linear mode of operation, by controlling the conducting degree of transistor or switching tube, control the size of its equiva lent impedance, thereby realize the adjustable object of load current.But this kind of electronic load works in linear zone because of its main devices transistor or switching tube, thermal value is very large, for the security consideration of heat radiation, needs very large heating radiator, therefore causes bulky.
Utility model content
In order to solve, in the load of existing linear DC electronics, critical component loss is large, thermal value is large, the large problem of required heating radiator volume, the utility model proposes the multifunctional DC electronics load device of the man-machine interaction that a kind of critical component loss is little, thermal value is little, required heating radiator volume is little.
The technical solution adopted in the utility model is:
, its principal character is: described DC electronic load device comprises major loop, DC Electronic Loads controller, control and display panel and accessory power supply.
Described major loop comprises over-voltage over-current protection circuit and Boost circuit, by electronic switch S, inductance L, diode D, metal-oxide-semiconductor M, output capacitance C and load R form, one end of described electronic switch S is connected with the positive pole of input voltage Vi, the other end of electronic switch S is connected with one end of inductance L, the other end of inductance L is connected with the anode of diode D and the drain electrode of metal-oxide-semiconductor M, the negative electrode of diode D is connected with one end of output capacitance C and one end of pull-up resistor R, the other end of the other end of output capacitance C and pull-up resistor R, the negative pole of the source electrode of metal-oxide-semiconductor M and input voltage Vi is connected.
Described DC Electronic Loads controller comprises voltage detecting circuit, current detection circuit, control circuit, PWM driving circuit, and described control circuit comprises again current control circuit and protection control circuit.
Described major loop is connected with described DC Electronic Loads controller, the detection port of the input voltage Vi of described major loop, the gate pole of metal-oxide-semiconductor M, the detection port of working current i, the control end of electronic switch S are connected with vc port, vg port, vsen port and vs port on DC Electronic Loads controller respectively, and the vset port of DC Electronic Loads controller is also connected with the vset port of control and display panel.
Voltage detecting circuit in described DC Electronic Loads controller, for detection of the input voltage Vi of major loop; Current detection circuit in described DC Electronic Loads controller, for detection of the size of DC Electronic Loads working current i; Current control circuit in described DC Electronic Loads controller, by the vsen port on comparison DC Electronic Loads controller and the signal of vset port, the control signal vgc of output mos pipe M; Current control circuit in described DC Electronic Loads controller, receives and compares the output signal of current detection circuit and the vset port signal of control and display panel, adopts stepping iteration control strategy, the control signal vgc of output mos pipe M; PWM driving circuit in described DC Electronic Loads controller converts the control signal vgc of metal-oxide-semiconductor M to the driving signal vg of metal-oxide-semiconductor M; The output signal of the protection control circuit receiver voltage testing circuit in described DC Electronic Loads controller and the output signal of current detection circuit; adopt overvoltage control strategy and cross flow control policy; the control signal of controlling electronic switch S by the vs port output of described DC Electronic Loads controller, realizes self-healing over-voltage over-current protection function.
Described control and display panel, for setting size and real-time duty and the related data that shows DC Electronic Loads of the working current i of DC Electronic Loads.
Described accessory power supply is for providing described DC Electronic Loads controller and control and the display panel required operating voltage that works.
Further illustrate, described protection control circuit is by hysteresis loop comparator 1 and hysteresis loop comparator 2, amplifier 1 and amplifier 2, OR circuit, reference voltage source 1, reference voltage source 2 forms, the vc port of DC Electronic Loads controller is connected with the input end of amplifier 1, the output terminal of amplifier 1 is connected with the normal phase input end of hysteresis loop comparator 1, reference voltage source 1 is connected with the inverting input of hysteresis loop comparator 1, the output terminal of hysteresis loop comparator 1 is connected with an input end of OR circuit, the vsen port of DC Electronic Loads controller is connected with the input end of amplifier 2, the output terminal of amplifier 2 is connected with the normal phase input end of hysteresis loop comparator 2, reference voltage source 2 is connected with the inverting input of hysteresis loop comparator 2, the output terminal of hysteresis loop comparator 2 is connected with another input end of OR circuit, the vs port of the output terminal of OR circuit and DC Electronic Loads controller,
Described current control circuit is by subtracter, totalizer, sampling holder, D/A converter, comparer, selector switch, triangular-wave generator, hysteresis loop comparator 3, reference voltage source 3 forms, the vsen port of DC Electronic Loads controller is connected with the input end of sampling holder, the output terminal of sampling holder and the inverting input of comparer, input end of totalizer and the positive input terminal of subtracter are connected, the vset port of DC Electronic Loads controller is connected with the input end of D/A converter, the output terminal of D/A converter is connected with the normal phase input end of comparer, the output terminal of comparer is connected with the control end G of selector switch, reference voltage source 3 is connected with another input end of totalizer and the negative input end of subtracter, the output terminal of subtracter is connected with 0 state input end of selector switch, the output terminal of totalizer is connected with 1 state input end of selector switch, the output terminal of selector switch is connected with the normal phase input end of hysteresis loop comparator 3, the output terminal of triangular-wave generator is connected with the inverting input of hysteresis loop comparator 3, the control signal vgc of the output terminal output mos pipe M of hysteresis loop comparator 3.
Technical conceive of the present utility model is: the Boost circuit of on-off mode work of take is main body, adopts stepping iteration control strategy, overvoltage control strategy and crosses flow control policy, realizes the multifunctional DC electronics load device of man-machine interaction.This DC electronic load device has the function of accurate control working current, also has the function of overvoltage and overcurrent protection simultaneously.
The beneficial effects of the utility model are mainly manifested in: different from the load of existing linear DC electronics, critical component in this DC Electronic Loads---switching tube in switch working state, loss is little, thermal value is little, required heating radiator is also little, can make the volume of whole DC electronic load device reduce significantly.In addition, whole DC electronic load device has man-machine interaction ground and accurately controls the function of working current, also has the function of overvoltage and overcurrent protection simultaneously.
Accompanying drawing explanation
Fig. 1 is the general diagram of the utility model embodiment.
Fig. 2 is the main circuit diagram of the utility model embodiment.
Fig. 3 is the functional block diagram of the DC Electronic Loads controller of the utility model embodiment.
Fig. 4 is the protection control circuit figure of the utility model embodiment.
Fig. 5 is the current control circuit figure of the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
Embodiment
With reference to Fig. 1-5, the principal character of the present embodiment is: described DC electronic load device comprises major loop, DC Electronic Loads controller, control and display panel and accessory power supply.
Described major loop comprises over-voltage over-current protection circuit and Boost circuit, by electronic switch S, inductance L, diode D, metal-oxide-semiconductor M, output capacitance C and load R form, one end of described electronic switch S is connected with the positive pole of input voltage Vi, the other end of electronic switch S is connected with one end of inductance L, the other end of inductance L is connected with the anode of diode D and the drain electrode of metal-oxide-semiconductor M, the negative electrode of diode D is connected with one end of output capacitance C and one end of pull-up resistor R, the other end of the other end of output capacitance C and pull-up resistor R, the negative pole of the source electrode of metal-oxide-semiconductor M and input voltage Vi is connected.
Described DC Electronic Loads controller comprises voltage detecting circuit, current detection circuit, control circuit, PWM driving circuit, and described control circuit comprises again current control circuit and protection control circuit.
Described major loop is connected with described DC Electronic Loads controller, the detection port of the input voltage Vi of described major loop, the gate pole of metal-oxide-semiconductor M, the detection port of working current i, the control end of electronic switch S are connected with vc port, vg port, vsen port and vs port on DC Electronic Loads controller respectively, and the vset port of DC Electronic Loads controller is also connected with the vset port of control and display panel.
Voltage detecting circuit in described DC Electronic Loads controller, for detection of the input voltage Vi of major loop; Current detection circuit in described DC Electronic Loads controller, for detection of the size of DC Electronic Loads working current i; Current control circuit in described DC Electronic Loads controller, by the vsen port on comparison DC Electronic Loads controller and the signal of vset port, the control signal vgc of output mos pipe M; Current control circuit in described DC Electronic Loads controller, receives and compares the output signal of current detection circuit and the vset port signal of control and display panel, adopts stepping iteration control strategy, the control signal vgc of output mos pipe M; PWM driving circuit in described DC Electronic Loads controller converts the control signal vgc of metal-oxide-semiconductor M to the driving signal vg of metal-oxide-semiconductor M; The output signal of the protection control circuit receiver voltage testing circuit in described DC Electronic Loads controller and the output signal of current detection circuit; adopt overvoltage control strategy and cross flow control policy; the control signal of controlling electronic switch S by the vs port output of described DC Electronic Loads controller, realizes self-healing over-voltage over-current protection function.
Described control and display panel, for setting size and real-time duty and the related data that shows the present embodiment of the working current i of the present embodiment.
Described accessory power supply is for providing described DC Electronic Loads controller and control and the display panel required operating voltage that works.
Further illustrate, described protection control circuit is by hysteresis loop comparator 1 and hysteresis loop comparator 2, amplifier 1 and amplifier 2, OR circuit, reference voltage source 1, reference voltage source 2 forms, the vc port of DC Electronic Loads controller is connected with the input end of amplifier 1, the output terminal of amplifier 1 is connected with the normal phase input end of hysteresis loop comparator 1, reference voltage source 1 is connected with the inverting input of hysteresis loop comparator 1, the output terminal of hysteresis loop comparator 1 is connected with an input end of OR circuit, the vsen port of DC Electronic Loads controller is connected with the input end of amplifier 2, the output terminal of amplifier 2 is connected with the normal phase input end of hysteresis loop comparator 2, reference voltage source 2 is connected with the inverting input of hysteresis loop comparator 2, the output terminal of hysteresis loop comparator 2 is connected with another input end of OR circuit, the vs port of the output terminal of OR circuit and DC Electronic Loads controller,
Described current control circuit is by subtracter, totalizer, sampling holder, D/A converter, comparer, selector switch, triangular-wave generator, hysteresis loop comparator 3, reference voltage source 3 forms, the vsen port of DC Electronic Loads controller is connected with the input end of sampling holder, the output terminal of sampling holder and the inverting input of comparer, input end of totalizer and the positive input terminal of subtracter are connected, the vset port of DC Electronic Loads controller is connected with the input end of D/A converter, the output terminal of D/A converter is connected with the normal phase input end of comparer, the output terminal of comparer is connected with the control end G of selector switch, reference voltage source 3 is connected with another input end of totalizer and the negative input end of subtracter, the output terminal of subtracter is connected with 0 state input end of selector switch, the output terminal of totalizer is connected with 1 state input end of selector switch, the output terminal of selector switch is connected with the normal phase input end of hysteresis loop comparator 3, the output terminal of triangular-wave generator is connected with the inverting input of hysteresis loop comparator 3, the control signal vgc of the output terminal output mos pipe M of hysteresis loop comparator 3.
The principle of work of the present embodiment is specific as follows:
(1) course of normal operation of stepping iteration
The present embodiment is by controlling and display panel setting working current setting value vset.When working current detection signal vsen is than vset hour, comparer output high level in current control circuit, the passage 1 of selector switch is connected, selector switch output signal (vsen+vsetp), hysteresis loop comparator 3 produces the control signal vgc of metal-oxide-semiconductor M according to signal (vsen+vsetp) and triangular-wave generator output signal vtri, result is the service time that increases metal-oxide-semiconductor M, thereby the working current i of the present embodiment is increased; Otherwise, when if working current detection signal vsen is larger than vset, comparer output low level, the passage 0 of selector switch is connected, selector switch output signal (vsen-vsetp), hysteresis loop comparator 3 produces the control signal vgc of metal-oxide-semiconductor M according to signal (vsen-vsetp) and triangular-wave generator output signal vtri, result is the service time that reduces switching tube M, thereby the working current of the present embodiment is reduced.Repeat the above-mentioned course of work, the working current i of final the present embodiment can remain in certain error range with setting value.
(2) the protection course of work of over-voltage and over-current
The overvoltage protection threshold value of the present embodiment is determined by the output voltage V ref1 of reference voltage source 1; input voltage detection signal vc is connected with the positive input terminal of hysteresis loop comparator 1 after amplifier 1 amplifies; reference voltage Vref 1 is connected with the negative input end of hysteresis loop comparator 1; when (vc * A1) is greater than Vref1; hysteresis loop comparator 1 output high level; protection control circuit output vs high level, makes over-voltage over-current protection circuit work, and electronic switch S disconnects.Otherwise, when (vc * A1) is less than Vref1, hysteresis loop comparator 1 output low level, protection control circuit output vs low level, does not work over-voltage over-current protection circuit, and electronic switch S closes; The overcurrent protection threshold value of the present embodiment is determined by the output voltage V ref2 of reference voltage source 2; current detection signal vsen is connected with the positive input terminal of hysteresis loop comparator 2 after amplifier 2 amplifies; reference voltage Vref 2 is connected with the negative input end of hysteresis loop comparator 2; when (vsen * A2) is greater than Vref2; hysteresis loop comparator 2 output high level; protection control circuit output vs high level, makes over-voltage over-current protection circuit work, and electronic switch S disconnects.Otherwise when (vsen * A2) is less than Vref2, hysteresis loop comparator 2 output low levels, do not work over-voltage over-current protection circuit, electronic switch S closes.And; the over-voltage over-current protection function of the present embodiment has self-reparability; when input voltage or working current are reduced to than threshold value hour from the value larger than threshold value; hysteresis loop comparator 1 and hysteresis loop comparator 2 be output low level again; over-voltage over-current protection circuit is quit work; electronic switch S closes, and makes DC Electronic Loads recover normal operating conditions.
Content described in this instructions embodiment is only enumerating the way of realization of utility model design; protection domain of the present utility model should not be regarded as only limiting to the concrete form that embodiment states, protection domain of the present utility model is also and in those skilled in the art's equivalent technologies means that design can be expected according to the utility model.
Claims (3)
1. a multifunctional DC electronics load device for man-machine interaction, is characterized in that: the multifunctional DC electronics load device of described man-machine interaction comprises major loop, DC Electronic Loads controller, control and display panel and accessory power supply;
Described major loop comprises over-voltage over-current protection circuit and Boost circuit, by electronic switch S, inductance L, diode D, metal-oxide-semiconductor M, output capacitance C and load R form, one end of described electronic switch S is connected with the positive pole of input voltage Vi, the other end of electronic switch S is connected with one end of inductance L, the other end of inductance L is connected with the anode of diode D and the drain electrode of metal-oxide-semiconductor M, the negative electrode of diode D is connected with one end of output capacitance C and one end of pull-up resistor R, the other end of the other end of output capacitance C and pull-up resistor R, the negative pole of the source electrode of metal-oxide-semiconductor M and input voltage Vi is connected,
Described DC Electronic Loads controller comprises voltage detecting circuit, current detection circuit, control circuit, PWM driving circuit, and described control circuit comprises again current control circuit and protection control circuit;
Described major loop is connected with described DC Electronic Loads controller, the detection port of the input voltage Vi of described major loop, the gate pole of metal-oxide-semiconductor M, the detection port of working current i, the control end of electronic switch S are connected with vc port, vg port, vsen port and vs port on DC Electronic Loads controller respectively, and the vset port of DC Electronic Loads controller is also connected with the vset port of control and display panel;
Voltage detecting circuit in described DC Electronic Loads controller, for detection of the input voltage Vi of major loop; Current detection circuit in described DC Electronic Loads controller, for detection of the size of DC Electronic Loads working current i; Current control circuit in described DC Electronic Loads controller, by the vsen port on comparison DC Electronic Loads controller and the signal of vset port, the control signal vgc of output mos pipe M; Current control circuit in described DC Electronic Loads controller, receives and compares the output signal of current detection circuit and the vset port signal of control and display panel, adopts stepping iteration control strategy, the control signal vgc of output mos pipe M; PWM driving circuit in described DC Electronic Loads controller converts the control signal vgc of metal-oxide-semiconductor M to the driving signal vg of metal-oxide-semiconductor M; The output signal of the protection control circuit receiver voltage testing circuit in described DC Electronic Loads controller and the output signal of current detection circuit, adopt overvoltage control strategy and cross flow control policy, the control signal of controlling electronic switch S by the vs port output of described DC Electronic Loads controller, realizes self-healing over-voltage over-current protection function;
Described control and display panel, for setting size and real-time duty and the related data that shows DC Electronic Loads of the working current i of DC Electronic Loads;
Described accessory power supply is for providing described DC Electronic Loads controller and control and the display panel required operating voltage that works.
2. the multifunctional DC electronics load device of man-machine interaction as claimed in claim 1, it is characterized in that: described protection control circuit is by hysteresis loop comparator one and hysteresis loop comparator two, amplifier one and amplifier two, OR circuit, reference voltage source one, reference voltage source two forms, the vc port of DC Electronic Loads controller is connected with the input end of amplifier one, the output terminal of amplifier one is connected with the normal phase input end of hysteresis loop comparator one, reference voltage source one is connected with the inverting input of hysteresis loop comparator one, the output terminal of hysteresis loop comparator one is connected with an input end of OR circuit, the vsen port of DC Electronic Loads controller is connected with the input end of amplifier two, the output terminal of amplifier two is connected with the normal phase input end of hysteresis loop comparator two, reference voltage source two is connected with the inverting input of hysteresis loop comparator two, the output terminal of hysteresis loop comparator two is connected with another input end of OR circuit, the vs port of the output terminal of OR circuit and DC Electronic Loads controller.
3. the multifunctional DC electronics load device of man-machine interaction as claimed in claim 1, it is characterized in that: described current control circuit is by subtracter, totalizer, sampling holder, D/A converter, comparer, selector switch, triangular-wave generator, hysteresis loop comparator three, reference voltage source three forms, the vsen port of DC Electronic Loads controller is connected with the input end of sampling holder, the output terminal of sampling holder and the inverting input of comparer, input end of totalizer and the positive input terminal of subtracter are connected, the vset port of DC Electronic Loads controller is connected with the input end of D/A converter, the output terminal of D/A converter is connected with the normal phase input end of comparer, the output terminal of comparer is connected with the control end G of selector switch, reference voltage source three is connected with another input end of totalizer and the negative input end of subtracter, the output terminal of subtracter is connected with 0 state input end of selector switch, the output terminal of totalizer is connected with 1 state input end of selector switch, the output terminal of selector switch is connected with the normal phase input end of hysteresis loop comparator three, the output terminal of triangular-wave generator is connected with the inverting input of hysteresis loop comparator three, the control signal vgc of the output terminal output mos pipe M of hysteresis loop comparator three.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320526175.7U CN203414545U (en) | 2013-08-27 | 2013-08-27 | Human-computer interaction multifunctional direct current electronic load device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320526175.7U CN203414545U (en) | 2013-08-27 | 2013-08-27 | Human-computer interaction multifunctional direct current electronic load device |
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| CN203414545U true CN203414545U (en) | 2014-01-29 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868888A (en) * | 2015-05-25 | 2015-08-26 | 兰州大学 | Multi-output state hysteresis comparator |
| CN105700611A (en) * | 2016-03-18 | 2016-06-22 | 重庆长安汽车股份有限公司 | Adjustable constant current electronic load |
| CN107885128A (en) * | 2017-12-04 | 2018-04-06 | 鲁东大学 | The high-power resistive load of continuously adjustabe based on alternating expression PWM |
| CN108761229A (en) * | 2018-04-16 | 2018-11-06 | 交通运输部水运科学研究所 | The electric property detection method and device of Big Dipper Shipborne terminal |
| CN109066642A (en) * | 2018-09-20 | 2018-12-21 | 江苏为恒智能科技有限公司 | A kind of two-way over-voltage hysteresis protection circuit of high-precision |
| CN110501540A (en) * | 2019-08-23 | 2019-11-26 | 深圳市精泰达科技有限公司 | A kind of electronic load circuit |
| CN114389480A (en) * | 2022-01-19 | 2022-04-22 | 宁波大学 | Piezoelectric energy acquisition circuit based on hysteresis control technology |
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2013
- 2013-08-27 CN CN201320526175.7U patent/CN203414545U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868888A (en) * | 2015-05-25 | 2015-08-26 | 兰州大学 | Multi-output state hysteresis comparator |
| CN104868888B (en) * | 2015-05-25 | 2017-12-26 | 兰州大学 | A kind of hysteresis loop comparator of multi output state |
| CN105700611A (en) * | 2016-03-18 | 2016-06-22 | 重庆长安汽车股份有限公司 | Adjustable constant current electronic load |
| CN107885128A (en) * | 2017-12-04 | 2018-04-06 | 鲁东大学 | The high-power resistive load of continuously adjustabe based on alternating expression PWM |
| CN108761229A (en) * | 2018-04-16 | 2018-11-06 | 交通运输部水运科学研究所 | The electric property detection method and device of Big Dipper Shipborne terminal |
| CN109066642A (en) * | 2018-09-20 | 2018-12-21 | 江苏为恒智能科技有限公司 | A kind of two-way over-voltage hysteresis protection circuit of high-precision |
| CN109066642B (en) * | 2018-09-20 | 2024-04-05 | 江苏为恒智能科技有限公司 | High-precision bidirectional overvoltage hysteresis protection circuit |
| CN110501540A (en) * | 2019-08-23 | 2019-11-26 | 深圳市精泰达科技有限公司 | A kind of electronic load circuit |
| CN114389480A (en) * | 2022-01-19 | 2022-04-22 | 宁波大学 | Piezoelectric energy acquisition circuit based on hysteresis control technology |
| CN114389480B (en) * | 2022-01-19 | 2023-05-12 | 宁波大学 | Piezoelectric energy acquisition circuit based on hysteresis control technology |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140129 Termination date: 20190827 |
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| CF01 | Termination of patent right due to non-payment of annual fee |