CN102495249B - Small current generator - Google Patents
Small current generator Download PDFInfo
- Publication number
- CN102495249B CN102495249B CN2011103994104A CN201110399410A CN102495249B CN 102495249 B CN102495249 B CN 102495249B CN 2011103994104 A CN2011103994104 A CN 2011103994104A CN 201110399410 A CN201110399410 A CN 201110399410A CN 102495249 B CN102495249 B CN 102495249B
- Authority
- CN
- China
- Prior art keywords
- resistance
- reometer
- adjustable potentiometer
- current generator
- adjustable
- 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 invention discloses a small current generator. A branch circuit consisting of a current meter A1, a resistor R1 and an adjustable potentiometer RP1 which are connected in series with one another, a branch circuit consisting of a current meter A2, a resistor R2 and an adjustable potentiometer RP2 which are connected in series with one another and a branch circuit consisting of a current meter A3, a resistor R3 and an adjustable potentiometer RP3 which are connected in series with one another are connected in parallel with one another to form a parallel branch circuit; a branch circuit consisting of the parallel branch circuit and an adjustable potentiometer RP4 which are connected in series with each other and a branch circuit consisting of a light emitting diode VD1 and a resistor R4 which are connected in series with each other are connected in parallel with each other; one end of the output end of a transformer is connected with a current meter A0, and the other end of the output end of the transformer is connected with one end of the resistor R4, which is not connected with the light emitting diode VD1; the other end of the output end of the transformer is connected to three interfaces on the lower row of a network interface RJ45; three interfaces on the upper row of the network interface RJ45 are connected to the interfaces of the adjustable potentiometers RP1, RP2 and RP3, which are not connected with the resistors R1, R2 and R3 respectively; and the output end of the network interface RJ45 outputs small current. The small current generator is small in debugging current, simple in wire connection operation, high in safety reliability, short in working time, and low in cost, and is convenient to construct.
Description
Technical field
The present invention relates to a kind of current generating apparatus.
Background technology
Often to use fluid chemical product pump motor in fluid chemical product storage vault, the minimum 75KW of power, maximum 160KW, this class motor requires very high to explosion-proof and operation stability, in order to prevent the reasons such as short circuit, overload, three-phase imbalance, cause motor to damage.
Existing product pump motor adopts intelligent motor protector; before pump comes into operation; requirement is carried out electric motor protective device and is adjusted and the simulated action test; guarantee that motor can normally move in the course of the work, therefore need the debugging strong current generator, the strong current generator quotation that quality is general on the market at present is 50,000 yuan of left and right approximately; quality is about 100,000 yuan of left and right preferably;, if please power supply administration make protective device, to there be at least 2 commissioning staffs to coordinate and carry out, and cause testing expenses high.Adopt strong current generator can produce 0 ~ 10000A electric current, to a circuit, provide the large electric current that needs, by current transformer, induce little electric current, resupply protective device and monitor.Adopt strong current generator debugging wiring complicated, need the power supply of power distribution cabinet electric motor protective device and motor start stop apparatus is removed former wiring, working power is provided in addition, test after complete and need recovery again, transfer former power distribution cabinet internal wiring and have risk.Because the motor power distribution cabinet is drawer type, during debugging, need power distribution cabinet is extracted out, the secondary circuit of motor field control start and stop needs rewiring.Because strong current generator produces very large electric current, secure context will be noted more, must conscientiously check wiring; otherwise because of carelessness just can scaling loss a whole set of power distribution cabinet switch and protective device; or produce larger contact resistance, and the impact debugging, debugging a motor protecting device needs the time longer.The defects such as in the case, small current generating means of needs self-control, avoid traditional current generating apparatus, and electric current is large, wiring is complicated, construction is loaded down with trivial details, safe reliability is not high, long in time limit, and efficiency is low, expense is high.
Summary of the invention
The purpose of this invention is to provide a kind of small current generator, solve the technical matters that debugging is large with the strong current generator electric current, wiring is complicated, construction is loaded down with trivial details, safe reliability is not high; And solve long in time limit, the problem that efficiency is low, expense is high.
For achieving the above object, the present invention adopts following technical scheme:
a kind of small current generator is characterized in that: comprise miniature transformer T1, the 4th reometer A0, the first reometer A1, the second reometer A2 and the 3rd reometer A3, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3 and the 4th resistance R 4, the four adjustable potentiometer RP0, the first adjustable potentiometer RP1, the second adjustable potentiometer RP2 and the 3rd adjustable potentiometer RP3, light emitting diode VD1 and RJ45 network interface, described the first reometer A1, the second reometer A2 and the 3rd reometer A3 be corresponding and the first resistance R 1 respectively, the second resistance R 2, the 3rd resistance R 3, the first adjustable potentiometer RP1, after the second adjustable potentiometer RP2 and the 3rd adjustable potentiometer RP3 connect in order, then with the first reometer A1, branch road and the second reometer A2 after the first resistance R 1 and the first adjustable potentiometer RP1 series connection, branch road and the 3rd reometer A3 after the second resistance R 2 and the second adjustable potentiometer RP2 series connection, branch circuit parallel connection after the 3rd resistance R 3 and the 3rd adjustable potentiometer RP3 series connection forms parallel branch, above-mentioned parallel branch is connected with the 4th adjustable potentiometer RP0 again, the branch road that forms again with light emitting diode VD1 and branch circuit parallel connection after the 4th resistance R 4 is connected, termination the 4th a reometer A0 in the transformer output terminal, the end that in the transformer output terminal, another termination the 4th resistance R 4 is not joined with light emitting diode VD1, and in the transformer output terminal, the other end is connected to three interfaces arranging under the RJ45 network interface, three interfaces arranging on the RJ45 network interface are connected to respectively the first adjustable potentiometer RP1, the second adjustable potentiometer RP2 and the 3rd adjustable potentiometer RP3 not respectively with the first resistance R 1, the second resistance R 2, the interface that the 3rd resistance R 3 connects, the little electric current of RJ45 network interface output terminal output.
Wherein, the 4th reometer A0, the first reometer A1, the second reometer A2 and the 3rd reometer A3 are the mA reometer.
Wherein, the first resistance R 1, the second resistance R 2 and the 3rd resistance R 3 all adopt two 22 Europe, 1 watt of resistance to be formed in parallel.
Wherein, the 4th resistance R 4 adopts 1000 Europe conventional, electric-resistance.
Wherein, miniature transformer T1 is transformed into 6 volts of alternating currents with 220 volts of alternating currents.
Wherein, the 4th adjustable potentiometer RP0 selects 100 Europe adjustable potentiometers.
Wherein, the first adjustable potentiometer RP1, the second adjustable potentiometer RP2 and the 3rd adjustable potentiometer RP3 adopt 10 Europe adjustable potentiometers.
Compared with prior art the present invention has following characteristics and beneficial effect: somewhat following 1. debugging of the present invention are little with electric current, only need often produce mutually maximum 100mA electric current and can simulate the primary current size, current transformer only has 250:0.05 and two kinds of no-load voltage ratios of 800:0.1, and the motor rated current is 279A to the maximum; 2. simple, the easy construction of wiring; only needing that output current is made RJ45 interface insertion protective device gets final product; need not to change the power distribution cabinet back panel wiring; starting switch simulation of the secondary circuit self-control of motor field control start and stop; approximately 10 minutes is motor protecting device of adjustable, greatly increases work efficiency.3. be easy to carry, this device volume is little, only has 80*55*45mm, and weight is less than 0.5Kg, and is easy to carry.4. debugging is effective, safe and reliable, adopts this device, owing to being output as little electric current, and directly adopts RJ45 interface access protective device, uses safety simple again.5. economical and practical, whole installation cost can realize debugging effect less than 50 yuan, and when debugging, 1 people carries out simple operations and gets final product, and saves at least 6 ten thousand yuan of debugging cost.
The present invention can be widely used in often will using in fluid chemical product pump motor in fluid chemical product storage vault.
Description of drawings
The present invention will be further described in detail below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of small current generator.
Fig. 2 is that the motor secondary control loop is simplified schematic diagram.
Embodiment
Shown in Figure 1, the structural representation of small current generator.A kind of small current generator, comprise miniature transformer T1, the 4th reometer A0, the first reometer A1, the second reometer A2 and the 3rd reometer A3, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3 and the 4th resistance R 4, the 4th adjustable potentiometer RP0, the first adjustable potentiometer RP1, the second adjustable potentiometer RP2 and the 3rd adjustable potentiometer RP3, light emitting diode VD1 and RJ45 network interface.Wherein, the first reometer A1, the second reometer A2, the 3rd reometer A3 and the 4th reometer A0 are the mA reometer.The first resistance R 1, the second resistance R 2 and the 3rd resistance R 3 all adopt two 22 Europe, 1 watt of resistance to be formed in parallel, and the 4th resistance R 4 adopts 1000 Europe conventional, electric-resistance.The first adjustable potentiometer RP1, the second adjustable potentiometer RP2 and the 3rd adjustable potentiometer RP3 adopt 10 Europe adjustable potentiometers, and the 4th adjustable potentiometer RP0 selects 100 Europe adjustable potentiometers.Miniature transformer T1 is transformed into 6 volts of alternating currents with 220 volts of alternating currents.
described the first reometer A1, the second reometer A2 and the 3rd reometer A3 be corresponding and the first resistance R 1 respectively, the second resistance R 2, the 3rd resistance R 3, the first adjustable potentiometer RP1, after the second adjustable potentiometer RP2 and the 3rd adjustable potentiometer RP3 connect in order, again with the first reometer A1, branch road and the second reometer A2 after the first resistance R 1 and the first adjustable potentiometer RP1 series connection, branch road and the 3rd reometer A3 after the second resistance R 2 and the second adjustable potentiometer RP2 series connection, branch circuit parallel connection after the 3rd resistance R 3 and the 3rd adjustable potentiometer RP3 series connection forms parallel branch, above-mentioned parallel branch is connected with the 4th adjustable potentiometer RP0 again, the branch road that forms again with light emitting diode VD1 and branch circuit parallel connection after the 4th resistance R 4 is connected, termination the 4th a reometer A0 in the transformer output terminal, above-mentioned the 4th reometer A0 does not connect an above-mentioned parallel branch of termination of transformer output terminal, the end that in the transformer output terminal, another termination the 4th resistance R 4 is not joined with light emitting diode VD1, and in the transformer output terminal, the other end is connected to three interfaces arranging under the RJ45 network interface, three interfaces arranging on the RJ45 network interface are connected to respectively the first adjustable potentiometer RP1, the second adjustable potentiometer RP2 and the 3rd adjustable potentiometer RP3 not respectively with the first resistance R 1, the second resistance R 2, the interface that the 3rd resistance R 3 connects, the little electric current of RJ45 network interface output terminal output.
Shown in Figure 2, the motor secondary control loop is simplified schematic diagram.In work; press start button STR; on the panel of this device, when red represents that simulated machine starts, and utilizes the RJ45 network interface of small current generator directly to access motor protecting device FH in the motor secondary control loop, completes experiment and debugging to motor protecting device FH.In debug process, can regulate by regulating the 4th adjustable potentiometer RP0, the first adjustable potentiometer RP1, the second adjustable potentiometer RP2 and the 3rd adjustable potentiometer RP3 the output current size of RJ45 network interface.
Claims (6)
1. a small current generator, is characterized in that: comprise miniature transformer T1, the 4th reometer A0, the first reometer A1, the second reometer A2 and the 3rd reometer A3, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3 and the 4th resistance R 4, the four adjustable potentiometer RP0, the first adjustable potentiometer RP1, the second adjustable potentiometer RP2 and the 3rd adjustable potentiometer RP3, light emitting diode VD1 and RJ45 network interface, described the first reometer A1, the second reometer A2 and the 3rd reometer A3 be corresponding and the first resistance R 1 respectively, the second resistance R 2, the 3rd resistance R 3, the first adjustable potentiometer RP1, after the second adjustable potentiometer RP2 and the 3rd adjustable potentiometer RP3 connect in order, then with the first reometer A1, branch road and the second reometer A2 after the first resistance R 1 and the first adjustable potentiometer RP1 series connection, branch road and the 3rd reometer A3 after the second resistance R 2 and the second adjustable potentiometer RP2 series connection, branch circuit parallel connection after the 3rd resistance R 3 and the 3rd adjustable potentiometer RP3 series connection forms parallel branch, above-mentioned parallel branch is connected with the 4th adjustable potentiometer RP0 again, the branch road that forms again with light emitting diode VD1 and branch circuit parallel connection after the 4th resistance R 4 is connected, termination the 4th a reometer A0 in the transformer output terminal, the end that the termination light emitting diode VD1 that above-mentioned the 4th reometer A0 does not connect the transformer output terminal does not join with the 4th resistance R 4, the end that in the transformer output terminal, another termination the 4th resistance R 4 is not joined with light emitting diode VD1, and in the transformer output terminal, the other end is connected to three interfaces arranging under the RJ45 network interface, three interfaces arranging on the RJ45 network interface are connected to respectively the first adjustable potentiometer RP1, the second adjustable potentiometer RP2 and the 3rd adjustable potentiometer RP3 not respectively with the first resistance R 1, the second resistance R 2, the interface that the 3rd resistance R 3 connects, the little electric current of RJ45 network interface output terminal output.
2. small current generator according to claim 1, it is characterized in that: wherein, the 4th reometer A0, the first reometer A1, the second reometer A2 and the 3rd reometer A3 are the mA reometer.
3. small current generator according to claim 1, it is characterized in that: wherein, the first resistance R 1, the second resistance R 2 and the 3rd resistance R 3 all adopt two 22 Europe, 1 watt of resistance to be formed in parallel.
4. small current generator according to claim 1 is characterized in that: wherein, the 4th resistance R 4 adopts 1000 Europe conventional, electric-resistance.
5. small current generator according to claim 1, it is characterized in that: wherein, miniature transformer T1 is transformed into 6 volts of alternating currents with 220 volts of alternating currents.
6. small current generator according to claim 1, it is characterized in that: wherein, the 4th adjustable potentiometer RP0 selects 100 Europe adjustable potentiometers.
7.Small current generator according to claim 1 is characterized in that: wherein, the first adjustable potentiometer RP1, the second adjustable potentiometer RP2 and the 3rd adjustable potentiometer RP3 adopt 10 Europe adjustable potentiometers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103994104A CN102495249B (en) | 2011-12-06 | 2011-12-06 | Small current generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103994104A CN102495249B (en) | 2011-12-06 | 2011-12-06 | Small current generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102495249A CN102495249A (en) | 2012-06-13 |
| CN102495249B true CN102495249B (en) | 2013-11-13 |
Family
ID=46187090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103994104A Expired - Fee Related CN102495249B (en) | 2011-12-06 | 2011-12-06 | Small current generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102495249B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336547B (en) * | 2013-05-27 | 2014-12-17 | 国家电网公司 | Direct current output controllable heavy current generator and control method thereof |
| CN103472272B (en) * | 2013-07-25 | 2015-10-21 | 浙江方圆电气设备检测有限公司 | A kind of photovoltaic combiner box DC current regulates test unit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008516328A (en) * | 2004-10-08 | 2008-05-15 | フリースケール セミコンダクター インコーポレイテッド | Reference circuit |
| CN101227152B (en) * | 2007-11-29 | 2010-04-14 | 国网电力科学研究院 | High-capacity square wave impact current generator |
| CN101567632B (en) * | 2009-02-26 | 2010-10-13 | 常熟理工学院 | Compensated high-current generation device |
| CN101728969B (en) * | 2009-12-08 | 2011-11-30 | 国网电力科学研究院 | Multi-waveform impulse current generator |
-
2011
- 2011-12-06 CN CN2011103994104A patent/CN102495249B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN102495249A (en) | 2012-06-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103956764B (en) | A kind of computer simulation experiment system for high-voltage direct-current transmission system | |
| CN104914734B (en) | A kind of mixed DC closed loop test system and implementation method | |
| CN108318766B (en) | Quick detection device for alternating-current power distribution cabinet of contact net operation vehicle | |
| CN206194228U (en) | Electric energy measurement analogue means | |
| CN102495249B (en) | Small current generator | |
| CN103472329A (en) | Voltage exceptional response testing system of photovoltaic grid-connected inverter | |
| CN206208997U (en) | A kind of transforming plant primary flow device | |
| CN202940463U (en) | Power-supply switching box | |
| CN206480263U (en) | A kind of low-voltage collecting meter reading failure training set | |
| CN209432939U (en) | A kind of high-power transformer second protection polarity test device | |
| CN204423067U (en) | A kind of impulse current generator control device | |
| CN204258421U (en) | 3kV ~ 10kV double-power supply switching device | |
| CN106994907A (en) | A kind of electric automobile Portable direct-current charging equipment and its input power method for limiting | |
| CN105353258B (en) | A kind of test method of test transformer differential protection reactance transformer excitation surge current | |
| CN206710498U (en) | A kind of simple rotor Overvoltage Protection Board device for detecting performance based on atmega16 | |
| CN202281822U (en) | Thyristor testing device | |
| CN108445427B (en) | Quick form tester of electric automobile alternating-current charging stake | |
| CN203251092U (en) | Multifunctional transition source box | |
| CN204065250U (en) | A kind of generator amature overvoltage protection proving installation | |
| CN204228882U (en) | A kind of winding polarity test checking apparatus of electric power mutual-inductor | |
| CN207882372U (en) | Comprehensive protector of motor tester | |
| CN208752161U (en) | A kind of tool for verifying generating set protective device operating condition latching logic | |
| CN206400910U (en) | A kind of basic electrician practical training apparatus | |
| CN205597975U (en) | Shock wave trigger circuit | |
| CN110554297A (en) | method for checking differential protection current loop of large high-voltage motor by using low-voltage electricity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131113 Termination date: 20201206 |