CN203535415U - High-current generating device control circuit with protection function - Google Patents
High-current generating device control circuit with protection function Download PDFInfo
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- CN203535415U CN203535415U CN201320637789.2U CN201320637789U CN203535415U CN 203535415 U CN203535415 U CN 203535415U CN 201320637789 U CN201320637789 U CN 201320637789U CN 203535415 U CN203535415 U CN 203535415U
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- voltage regulator
- motor
- generating device
- current generating
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Abstract
The utility model provides a high-current generating device control circuit with a protection function, and relates to a high-current generating device. The control circuit is provided with a voltage regulator, a current transformer, a CPU, a relay and a DC motor, the current transformer is individually connected with the voltage regulator and the CPU, an output port of the CPU is connected with the DC motor via the relay, and an output terminal of the DC motor is connected with the voltage regulator and used for driving the voltage regulator. According to abnormal tripping phenomenon possibly generated in actual operation for the high-current generating device, the DSP control technology is used, automatic buck zeroing operation is arranged, and therefore assured processibility factor can be improved and cost is relatively low. When operation of the high-current generating device is ended, the voltage regulator is not required to be returned to zero by users, a stop button can be directly pressed, the motor is controlled by a control system through the relay, and the voltage regulator is driven to reduce the voltage until zero. A fault caution function is also arranged to emit a caution signal so as to remind the users to regulate manually and maintain faults when the voltage regulator or the motor is out of order.
Description
Technical field
The utility model relates to high-current generation device, relates in particular to and can prevent that high-current generation device is because maloperation produces the high-current generation device control loop with defencive function of harm.
Background technology
High-current generation device is in electric power, electric utility debugging, to need the essential equipment in large electric current place, the current loading test and the temperature rise test that are applicable to frequency 50Hz switch, current transformer and other electric equipment, mainly comprise the parts such as high-performance pressure regulator, rising current transformer, temperature measurement equipment, Regulation Control equipment.
At present, most high-current generation devices must first make zero pressure regulator after test, then cut off the electricity supply by stop button.If forget first pressure regulator is made zero during user's EO, directly press stop button; Or user presses because of carelessness stop button in experimentation, large electric current can produce superpotential because being cut off suddenly, contact is caused damage, and likely make CT magnetic saturation, makes device damage, to personal safety, brings hidden danger.
Summary of the invention
The purpose of this utility model is to provide a kind of high-current generation device control loop with defencive function.
The utility model is provided with pressure regulator, current transformer, CPU, relay and direct current generator; Described current transformer is connected with CPU with pressure regulator respectively, and the output port of CPU connects direct current generator through relay, and the output termination pressure regulator of direct current generator, for driving pressure regulator.
The utility model, according to the improper separating brake phenomenon that may occur in high-current generation device practical operation (if people is maloperation or power failure etc.), utilizes DSP control technology, and automatic step-down rezero operation is set, and can promote assured processibility factor, and cost is lower.Can realize: during high-current generation device EO, user need not be made zero pressure regulator, can directly press stop button, control system, by Control motor, drives pressure regulator to carry out step-down until be zero.Failure warning function is set simultaneously, at pressure regulator or motor, sends alarm signal when malfunctioning, remind user's manual adjustments also to carry out trouble hunting.
Accompanying drawing explanation
Fig. 1 is the electric circuit constitute block diagram of the utility model embodiment.
Embodiment
Referring to Fig. 1, the utility model embodiment is provided with pressure regulator 1, current transformer 2, CPU3, relay 4 and direct current generator 5; Described current transformer 2 is connected with CPU3 with pressure regulator 1 respectively, and the output port of CPU3 connects direct current generator 5 through relay 4, and the output termination pressure regulator 1 of direct current generator 5, for driving pressure regulator 1.
First utilize current transformer to obtain large current value, by diode rectifier bridge, carry out rectification, and series current sampling resistor, convert current signal to voltage signal; DSP gathers the magnitude of voltage at current acquisition resistance two ends and is obtained real output current and it is shown by LCD12864 by computing; Because the precision of ADC is limited, and the range of controller judgement is that 5A is to 25mA or less, cross over very large, when therefore ADC samples, will be divided into two-way sampling, the range of the first via is that 5A is to 0.5A, when the electric current detecting is less than 0.5A, drive relay to connect the hardware corridor of the second tunnel sampling, start the sampling on the second tunnel.
CPU can adopt DSP(tms320f28027) controller, DSP, after scanning stop button and being pressed, judges according to sampled signal, when electric current is greater than zero, send driving signal, make relay coil energising, contact closure, make electric machine rotation, control pressure regulator and carry out step-down; The information warning of liquid crystal display simultaneously, points out the current reduced pressure operation that carrying out.After pressure regulator makes zero, detecting current value is zero, and closed relay drives signal, and motor stops operating, and liquid crystal display step-down completes, and equipment is safe.Until controller gathers current current value, when being less than certain setting value, stop motor, during controller according to sampled value, give specific information warning and inform user's current state.
The situation that protection was lost efficacy when avoiding occurring breaking down or being subject to electromagnetic interference (EMI) because of controller self, also can carry out by the mechanical chain of hardware protection equipment, while being the pressure regulation of driven by motor pressure regulator, by the current value of collection and the judgement of the rotating speed of motor, be adjusted to the required time of setting value, when exceeding the stipulated time, just can think that motor rotation blockage or pressure regulator are malfunctioning, now electric interlock is by cut-out motor power supply and send alarm signal and make controller produce external interrupt and show error message, reminding user is by the step-down of manual shift handwheel, and overhaul in time motor or pressure regulator.
The utility model, by DSP Detection & Controling, is realized while pressing stop button, and the automatic step-down of pressure regulator is made zero, and avoids electric current to cut off and the harm of generation suddenly, also can send alarm signal to pressure regulator or the malfunctioning situation of motor simultaneously, improves safety coefficient.
Claims (1)
1. with the high-current generation device control loop of defencive function, it is characterized in that being provided with pressure regulator, current transformer, CPU, relay and direct current generator; Described current transformer is connected with CPU with pressure regulator respectively, and the output port of CPU connects direct current generator through relay, and the output termination pressure regulator of direct current generator, for driving pressure regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320637789.2U CN203535415U (en) | 2013-10-16 | 2013-10-16 | High-current generating device control circuit with protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320637789.2U CN203535415U (en) | 2013-10-16 | 2013-10-16 | High-current generating device control circuit with protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203535415U true CN203535415U (en) | 2014-04-09 |
Family
ID=50421606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320637789.2U Expired - Fee Related CN203535415U (en) | 2013-10-16 | 2013-10-16 | High-current generating device control circuit with protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203535415U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112650343A (en) * | 2020-12-10 | 2021-04-13 | 国网辽宁省电力有限公司抚顺供电公司 | Intelligent changeable load generator |
-
2013
- 2013-10-16 CN CN201320637789.2U patent/CN203535415U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112650343A (en) * | 2020-12-10 | 2021-04-13 | 国网辽宁省电力有限公司抚顺供电公司 | Intelligent changeable load generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20171016 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |