CN205787997U - A kind of DC low-voltage electrical equipment overload test stabilized current supply - Google Patents
A kind of DC low-voltage electrical equipment overload test stabilized current supply Download PDFInfo
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- CN205787997U CN205787997U CN201620612268.5U CN201620612268U CN205787997U CN 205787997 U CN205787997 U CN 205787997U CN 201620612268 U CN201620612268 U CN 201620612268U CN 205787997 U CN205787997 U CN 205787997U
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- current
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- diverter
- stabilizing controller
- pressure regulator
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Abstract
A kind of DC low-voltage electrical equipment overload test stabilized current supply, it mainly includes main circuit and control circuit, described main circuit is composed in series by pressure regulator, transformator, three-phase bridge rectifier and diverter, the external three-phase alternating-current supply in former limit of described pressure regulator, the secondary connection transformer of pressure regulator, the secondary output of described transformator connects described three-phase bridge rectifier；Described three-phase bridge rectifier connects diverter and by unidirectional current via different diverter output, and the selection of different diverters is based on different tests size of current and determines；Described control circuit is made up of current stabilizing controller, chronograph and servomotor, described current stabilizing controller uses single closed loop controlling structure, the diverter outfan of main circuit is connected by a sensor, the size of output electric current is fed back to current stabilizing controller weight compare with set-point, and have described current stabilizing controller to adjust output electric current close to given electric current；It uses single closed loop control, current stabilization, facilitates the features such as succinct.
Description
Technical field
This utility model be a kind of be for DC low-voltage electric elements overload (long delay) Interruption detection provide
DC constant current experiment power supply, belongs to low-voltage electrical apparatus detection technique field.
Background technology
Along with the extensive exploitation of the new forms of energy such as photovoltaic utilizes, and the fast development such as high ferro, light rail, DC low-voltage electrical equipment
Research and development and production dynamics persistently strengthen, and the requirement to Product checking ability improves the most accordingly.
The overlond trip performance test of DC low-voltage electric elements, needs the time delay that test products has in an overload condition
Interruption, this is necessary for, by the DC current stabilized power supply equipment that can regulate size of current, current stabilization, advising for difference
The product of lattice provides the corresponding test current simulating overload condition, whether meets mark with the tripping characteristic that this checks this product
Alignment request.
Traditional similar test, owing to not having special equipment, needs to concatenate with relevant device, instrument, and function is more single,
Troublesome poeration, degree of regulation is low, and auxiliary equipment is many, takes up an area big, has influence on the accuracy of test operation, convenience and work efficiency
And working environment.
Summary of the invention
The purpose of this utility model is the deficiency overcoming prior art to exist, and provides a kind of and use single closed loop control,
Current stabilization, easy and simple to handle, export current adjustment, there is the DC low-voltage electrical equipment overload test stabilized current supply of hommization.
This utility model completes by following technical solution, a kind of DC low-voltage electrical equipment overload test current stabilization electricity
Source, it mainly includes main circuit and control circuit, described main circuit by pressure regulator, transformator, three-phase bridge rectifier and
Diverter is composed in series, the external three-phase alternating-current supply in former limit of described pressure regulator, the secondary connection transformer of pressure regulator, described change
The secondary output of depressor connects described three-phase bridge rectifier；Described three-phase bridge rectifier connects diverter and by unidirectional current warp
By different diverter output, the selection of different diverters is based on different tests size of current and determines；
Described control circuit is made up of current stabilizing controller, chronograph and servomotor, and described current stabilizing controller is adopted
Use single closed loop controlling structure, connected the diverter outfan of main circuit by a sensor, the size of output electric current is fed back to
Current stabilizing controller weight compares with set-point, and has described current stabilizing controller to adjust output electric current close to given electric current.
As preferably: described current stabilizing controller uses the main WL-2 type current stabilizing controller being responsible for current signal collection；
Being configured with servomotor on described pressure regulator, this servomotor is connected with described current stabilizing controller by chronograph；Described
Servomotor by current stabilizing controller receive diverter output current signal feedback after, according to the output current signal of feedback reception
Size controls servomotor and is automatically adjusted pressure regulator output voltage；
In described three-phase bridge rectifier, selection control rapidity is preferable, it is that big capacity load is powered, maximum to be applicable to
Out-of-control time is only the IGCT of three-phase semiwave circuit half.
This utility model by being automatically adjusted or can manually regulate output many specifications test current, improves detection efficiency；
Can in time, accurately show size of current and conduction time, it is not necessary to additionally connect ammeter, timer etc., convenient succinct；Its tool
There is current stabilization, easy and simple to handle, export current adjustment, there is the features such as hommization.
Accompanying drawing explanation
Fig. 1 is main circuit structure figure of the present utility model.
Fig. 2 is control circuit structure chart of the present utility model.
Fig. 3 is control principle block diagram of the present utility model.
Fig. 4 is three-phase bridge rectifier circuit schematic diagram of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described in detail: shown in Fig. 1-4, one described in the utility model
DC low-voltage electrical equipment overload test stabilized current supply, it mainly includes main circuit and control circuit, described main circuit by pressure regulator,
Transformator, three-phase bridge rectifier and diverter are composed in series, the external three-phase alternating-current supply in former limit of described pressure regulator, pressure regulation
The secondary connection transformer of device, the secondary output of described transformator connects described three-phase bridge rectifier；Described three-phase bridge is whole
Stream device connects diverter and via different diverter output, the selection of different diverters, unidirectional current is based on different tests electricity
Stream size determines；
Described control circuit is made up of current stabilizing controller, chronograph and servomotor, and described current stabilizing controller is adopted
Use single closed loop controlling structure, connected the diverter outfan of main circuit by a sensor, the size of output electric current is fed back to
Current stabilizing controller weight compares with set-point, and has described current stabilizing controller to adjust output electric current close to given electric current.
Current stabilizing controller described in the utility model uses the main WL-2 type current stabilizing controller being responsible for current signal collection；
Being configured with servomotor on described pressure regulator, this servomotor is connected with described current stabilizing controller by chronograph；Described
Servomotor by current stabilizing controller receive diverter output current signal feedback after, according to the output current signal of feedback reception
Size controls servomotor and is automatically adjusted pressure regulator output voltage；
In described three-phase bridge rectifier, selection control rapidity is preferable, it is that big capacity load is powered, maximum to be applicable to
Out-of-control time is only the IGCT of three-phase semiwave circuit half.
Embodiment: technology of the present utility model requirement is:
(1) output electric current gear: 0 ~ 20A, 20 ~ 100A, 100 ~ 500A；
(2) by changing alternating current voltage, output size of current is controlled；
(3) ripple factor < 5%；
(4) source current is adjustable.Can arrange and show output given value of current value, equipment can be automatically adjusted and output current to institute
The current value set, can manually regulate the adjustment coordinating output electric current simultaneously；
(5) there is clocking capability, it is possible to record conduction time；
(6) there is display function, meansigma methods and the peak value of output electric current can be shown.
Main circuit shown in Fig. 1 is made up of three-phase regulator, transformator, three-phase bridge rectifier circuit and diverter.Logical
Crossing three-phase regulator and provide adjustable alternating current power supply for device, the step-down transformer through 380V/8V obtains low-voltage and high-current
Alternating current.This three-phase alternating current is supplied to three-phase bridge rectifier circuit, rectification obtain unidirectional current, then via three different rule
The diverter of lattice exports after distinguishing the gear exporting electric current.
Main circuit described in the utility model is powered by external three phase mains, and three-phase alternating current is connected on the former limit of pressure regulator,
Pressure regulator secondary connects the transformator of a 380V/8V, and the three-phase alternating current supply three-phase bridge of the secondary output of transformator is whole
Current circuit, by unidirectional current via different diverter output after rectification.The selection of diverter is according to no test current size
Determine.
Control circuit shown in Fig. 2 is made up of WL type current stabilizing controller, chronograph and servomotor.It is WL-2 by model
Type current stabilizing controller is control core, the main collection being responsible for current signal.When the measured value passed through is more than or less than setting
During numerical value, output adjusts signal accordingly, controls pressure regulator adjustment voltage swing and makes output electric current within set point.Need
Time, it is possible to manually regulate pressure regulator, make output electric current meet test requirements document.
Control circuit is mainly by setting the current value of requirement on flow straightener, and the current signal of diverter collection returns to
On current stabilizing controller, control motor according to the size of return signal and be automatically adjusted pressure regulator output voltage, thus realize
Export galvanic automatic regulation function.
This utility model selects three-phase bridge rectifier circuit, has an advantage in that output commutating voltage relatively three phase half wave rectification electricity
Road doubles, and the pulsation of output voltage is less, transformer utilization factor is high and without dc magnetization problem.Additionally three-phase bridge rectification electricity
The maximum out-of-control time of the IGCT on road is only the half of three-phase semiwave circuit, therefore it is preferable to control rapidity, thus is applicable to big
Capacity load is powered.
In control circuit, current stabilizing controller takes single Design of Closed-Loop Control (see figure 3), and the advantage of this controller is can
By sensor, the size of output electric current is fed back to controller compare with set-point, thus adjust output electricity further
Stream, makes system output current close to requiring given electric current.
Control signal, by arranging the current value of requirement on current stabilizing controller, is exported by this utility model by relay
Servomotor on pressure regulator, thus alternating voltage output dc point is raised and lowered, on diverter, the signal of output returns simultaneously
Return to current stabilizing controller further regulated.This whole process cooperates and constitutes single closed loop Regulation Control.
Claims (2)
1. a DC low-voltage electrical equipment overload test stabilized current supply, it mainly includes main circuit and control circuit, it is characterised in that
Described main circuit is composed in series by pressure regulator, transformator, three-phase bridge rectifier and diverter, the former limit of described pressure regulator
External three-phase alternating-current supply, the secondary connection transformer of pressure regulator, the secondary output of described transformator connects described three-phase bridge
Commutator；Described three-phase bridge rectifier connects diverter and by unidirectional current via different diverter output, different diverters
Selection be based on different tests size of current determine；
Described control circuit is made up of current stabilizing controller, chronograph and servomotor, and described current stabilizing controller uses single
Closed loop controlling structure, connects the diverter outfan of main circuit by a sensor, and the size of output electric current is fed back to current stabilization
Control to think highly of to compare with set-point, and have described current stabilizing controller to adjust output electric current close to given electric current.
DC low-voltage electrical equipment overload test stabilized current supply the most according to claim 1, it is characterised in that described current stabilization control
Device processed uses the main WL-2 type current stabilizing controller being responsible for current signal collection；It is configured with servomotor on described pressure regulator,
This servomotor is connected with described current stabilizing controller by chronograph；Described servomotor is received shunting by current stabilizing controller
After device output current signal feedback, control servomotor according to the output current signal size of feedback reception and be automatically adjusted pressure regulator
Output voltage；
In described three-phase bridge rectifier, selection control rapidity is preferable, it is that big capacity load is powered, maximum out of control to be applicable to
Time is only the IGCT of three-phase semiwave circuit half.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620612268.5U CN205787997U (en) | 2016-06-21 | 2016-06-21 | A kind of DC low-voltage electrical equipment overload test stabilized current supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620612268.5U CN205787997U (en) | 2016-06-21 | 2016-06-21 | A kind of DC low-voltage electrical equipment overload test stabilized current supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205787997U true CN205787997U (en) | 2016-12-07 |
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ID=58131984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620612268.5U Expired - Fee Related CN205787997U (en) | 2016-06-21 | 2016-06-21 | A kind of DC low-voltage electrical equipment overload test stabilized current supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205787997U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108845612A (en) * | 2018-08-29 | 2018-11-20 | 浙江方圆电气设备检测有限公司 | A kind of stabilized current supply |
| CN110034693A (en) * | 2019-04-29 | 2019-07-19 | 郑州铁路职业技术学院 | A kind of automatic controller for outputting three-phase current steadily |
-
2016
- 2016-06-21 CN CN201620612268.5U patent/CN205787997U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108845612A (en) * | 2018-08-29 | 2018-11-20 | 浙江方圆电气设备检测有限公司 | A kind of stabilized current supply |
| CN108845612B (en) * | 2018-08-29 | 2024-05-28 | 浙江方圆电气设备检测有限公司 | Current stabilizing power supply |
| CN110034693A (en) * | 2019-04-29 | 2019-07-19 | 郑州铁路职业技术学院 | A kind of automatic controller for outputting three-phase current steadily |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20190621 |