CN202127522U - Intermediate frequency power supply closed-loop control system for machining of high-speed railway fastener elastic strip - Google Patents
Intermediate frequency power supply closed-loop control system for machining of high-speed railway fastener elastic strip Download PDFInfo
- Publication number
- CN202127522U CN202127522U CN2011202247903U CN201120224790U CN202127522U CN 202127522 U CN202127522 U CN 202127522U CN 2011202247903 U CN2011202247903 U CN 2011202247903U CN 201120224790 U CN201120224790 U CN 201120224790U CN 202127522 U CN202127522 U CN 202127522U
- Authority
- CN
- China
- Prior art keywords
- intermediate frequency
- power supply
- frequency power
- loop control
- circuit
- 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 - Lifetime
Links
Images
Landscapes
- Inverter Devices (AREA)
- General Induction Heating (AREA)
Abstract
The utility model discloses an intermediate frequency power supply closed-loop control system for machining of a high-speed railway fastener elastic strip, which is mainly used for intermediate frequency heating equipment of a raw material in manufacturing process of the elastic strip and comprises an AC-DC-AC silicon controlled rectifier inverse variation circuit, a microcomputer control circuit, a high-speed thermodetector and a PLC (Programmable Logic Controller); a signal of the high-speed thermodetector is connected with the PLC; an output signal of the PLC is connected with the microcomputer control circuit; the microcomputer control circuit is used for controlling silicon controlled trigger pulse of a rectification circuit so as to control the power output of the inverse variation circuit; therefore, the temperature closed-loop control of the intermediate frequency power supply is achieved. The intermediate frequency power supply closed-loop control system for machining of the high-speed railway fastener elastic strip not only can be used for realizing the temperature closed-loop control of heated workpieces, but also can be used for using a microcomputer to control the silicon controlled trigger pulse to realize digital control; therefore, the control circuit is integrated and minimized; the equipment space is saved; and the maintenance is convenient.
Description
Technical field
The present invention relates to a kind of intermediate frequency power supply closed-loop control that is directed to spring production usefulness; In the spring production process, add the intermediate frequency power supply closed-loop control, realize variation along with the workpiece tapping temperature; Automatically regulate the watt level of intermediate frequency power supply, and then reach the function of temperature stabilization.
Background technology
Intermediate frequency power supply is a kind of equipment that is used for high-speed railway fastener spring raw material heating usefulness, is a kind of state type variable frequency power supply of being made up of the high-power silicon controlled rectifier element.It utilizes thyristor to be transformed into controlled direct voltage to the three-phase main-frequency AC power of 380V 50Hz, and filtering becomes single-phase midfrequent ac power supply with dc voltage conversion through reactor then, and supply load is used for the heating of metal.So intermediate frequency power supply is actually the device of a three-phase main-frequency AC-DC-single-phase midfrequent ac power supply.For with heating and temperature control in the scope that technology allows, heating has been proposed higher requirement with the control of intermediate frequency power supply.
The utility model content
The purpose of the utility model is; Provide a kind of high-speed railway fastener spring to use the intermediate frequency power supply closed-loop control, utilize this system, can realize the closed-loop control of intermediate frequency power supply; The present invention designs and adopts the safe temperature measurer of at a high speed accurate thunder; Carry out Temperature Feedback, carry out the given adjusting of power supply through PLC afterwards, and then reach closed-loop control.
The high-speed railway fastener spring of the utility model is used the intermediate frequency power supply closed-loop control, and concrete technical scheme is following:
A kind ofly be directed to high-speed railway fastener spring processing and use the intermediate frequency power supply closed-loop control system; The silicon controlled rectifier inverter circuit, microcomputer control circuit, high-speed temperature measurer, the PLC that comprise AC-DC-interchange; The signal of high speed temperature measurer connects PLC, and PLC output signal is connected to microcomputer control circuit, the SCR trigger pulse of microcomputer control circuit control rectification circuit; And then the power output of control inverter circuit, reach the temperature closed loop control of intermediate frequency power supply.
Further; Rectification circuit comprises 0809 analog to digital converter, 8031 chip microprocessors, 2732 program storage devices, level translation and isolation and triggers power amplifier; The intermediate frequency level demand signal presses Ugd, three feedback signal direct voltage Ud, direct current Id and voltage of intermediate frequency Ua to be input to 8031 chip microprocessors through 0809 analog to digital converter; The single chip microcomputer processor is according to the program of 2732 program storage devices; Process, be connected to 74LS273 circuits for triggering and isolation and power amplifier afterwards, thereby produce commutating pulse and inversion pulse.
Further, also comprise the touch-screen that carries out power adjustments, be used for the power of intermediate frequency power supply is provided with.
Control circuit is made up of single chip microcomputer and peripheral circuit thereof, and its main effect is: the microcomputer pulse control of a. three-phase fully-controlled rectifier; B. the integrated circuit pulse of inverter control; C. digital power-regulating system; D. over-current over-voltage protection and status fault show; E. system controlled by computer three arms starting.
There are two power adjustments functions the outside, and one is provided with by external touch screen, is main power source, and another gets into PLC by the Temperature Feedback of temperature measurer, afterwards setting power is carried out the adjustment in the certain limit, thereby reaches closed-loop control.
Adopt high-speed railway fastener spring of the present invention to use the intermediate frequency power supply closed-loop control; Not only can be implemented in the closed-loop control of workpiece heated temperatures; More can use the system controlled by computer SCR trigger pulse, realize digital controlly, make integrated, the miniaturization of control circuit; Save the device space, easy to maintenance.Major advantage is (1) energy exchange efficient height, can reach more than 90%, and control flexibly, and starting and stopping are convenient, adjusting is rapid, are convenient to improve technology and enhance productivity.(2) output frequency tracking frequency variation automatically, easy to operate.Non-impact current when (3) starting, simple in structure, startup ability improves, and makes operation more reliable.(4) adopt the SCR trigger pulse of micro-processor controlled AC-DC-AC, realize digital controlly, make that control circuit is integrated, precision, miniaturization, make operation, operate more flexibility and reliability.(5) adopt the safe high-speed temperature measurer of U.S.'s thunder, make reaction fast, thermometric is accurate, and in addition PLC control makes temperature fluctuation within the specific limits, can regulate power automatically, reaches temperature closed loop control fully.
Description of drawings
Fig. 1 is the system controlled by computer schematic diagram;
Fig. 2 is the PLC schematic diagram of intermediate frequency furnace part;
Fig. 3 is an intermediate frequency operating desk schematic diagram;
Fig. 4 is an intermediate frequency furnace main circuit schematic diagram.
Embodiment
Can know that referring to Fig. 1-4 three-phase full-bridge controlled rectifier of being made up of six thyristors is in a power frequency period; Six controllable silicons are mutual deviation T/6 triggering and conducting successively; Each element conductive time is T/3, and rectifier bridge is output as the direct voltage Ud of a pulsation, through smoothing reactor Ld; Obtain a smoother direct current Id; When smoothing reactor Ld was enough big, rectification output dc voltage mean value was Ud=2.34U*COSa (wherein U is the phase voltage of power frequency supply, and a is that thyristor triggers pilot angle).This shows, under the certain condition of AC supply voltage, change stool and urine scalable that triggers pilot angle a and the size that changes direct voltage Ud, also promptly regulate the size of output intermediate frequency power.The size that triggers pilot angle a is given by potentiometer RP (4RP5 among the figure one), so the output voltage U gd of potentiometer intermediate frequency watt level given just.
The control of rectification circuit is made up of 0809 analog to digital converter, 8031 chip microprocessors, 2732 program storage devices, level translation and isolation and triggering power amplifier etc.By the next synchronized signal of Uac; Benchmark as phase place; After shaping, be input to single-chip microprocessor system; Simultaneously, the intermediate frequency level demand signal presses Ugd, three feedback signal-direct voltage Ud, direct current Id and voltage of intermediate frequency Ua also to be input to single-chip microprocessor system through the A/D conversion, realizes stablizing, place restrictions on maximum direct current and placing restrictions on the too high of voltage of intermediate frequency of direct voltage.If overcurrent, overvoltage fault take place, in software program, will trigger pilot angle at once and move on to 150 degree, just also etc. pending through stopping paying out the rectifier and trigger pulse behind several power frequency periods.
When the starting inverter circuit, single chip microcomputer blocks one-shot multivibrator, and sends separate excitation inversion trigger impulse, removes to trigger the inversion controllable silicon through NAND gate circuit and power amplifier.After inversion is vibrated successfully, several intermediate frequency is arranged during the cycle, single chip microcomputer is stopped paying out the separate excitation pulse on the one hand, opens one-shot multivibrator on the other hand and makes it to be the self-excitation operating state, and inverter circuit gets into normal condition.When major loop generation overcurrent-overvoltage fault, in order effectively to protect the inversion thyristor rapidly, single chip microcomputer blocks trigger impulse again fast.
There are two power adjustments functions the outside, and one is provided with by external touch screen, is main power source; Be " 0-10V manual setting " signal in the intermediate frequency operating desk schematic diagram among the figure three, another gets into PLC by i.e. " thermometer " signal among the figure three of the Temperature Feedback of temperature measurer; Afterwards setting power is carried out the adjustment in the certain limit, its adjusted value is " Temperature Feedback " signal in the figure two intermediate frequency furnaces PLC schematic diagram partly, and then " intermediate frequency is given " signal among the figure two is revised; Promptly revise Ugd; Change controllable silicon trigger angle a, change the power of output, thereby reach closed-loop control.
Claims (3)
1. one kind is directed to high-speed railway fastener spring processing and uses the intermediate frequency power supply closed-loop control system; Comprise silicon controlled rectifier inverter circuit, microcomputer control circuit, high-speed temperature measurer, the PLC of AC-DC-interchange, it is characterized in that the signal of high speed temperature measurer connects PLC; PLC output signal is connected to microcomputer control circuit; The SCR trigger pulse of microcomputer control circuit control rectification circuit, and then the power output of control inverter circuit reach the temperature closed loop control of intermediate frequency power supply.
2. intermediate frequency power supply closed-loop control system according to claim 1; It is characterized in that; Its rectification circuit comprises 0809 analog to digital converter, 8031 chip microprocessors, 2732 program storage devices, level translation and isolation and triggers power amplifier; The intermediate frequency level demand signal presses Ugd, three feedback signal direct voltage Ud, direct current Id and voltage of intermediate frequency Ua to be input to 8031 chip microprocessors through 0809 analog to digital converter, and the single chip microcomputer processor is processed according to the program of 2732 program storage devices; Be connected to 74LS273 circuits for triggering and isolation and power amplifier afterwards, thereby produce commutating pulse and inversion pulse.
3. intermediate frequency power supply closed-loop control system according to claim 2 is characterized in that, also comprises the touch-screen that carries out power adjustments, is used for the power of intermediate frequency power supply is provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202247903U CN202127522U (en) | 2011-06-29 | 2011-06-29 | Intermediate frequency power supply closed-loop control system for machining of high-speed railway fastener elastic strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202247903U CN202127522U (en) | 2011-06-29 | 2011-06-29 | Intermediate frequency power supply closed-loop control system for machining of high-speed railway fastener elastic strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202127522U true CN202127522U (en) | 2012-01-25 |
Family
ID=45490582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202247903U Expired - Lifetime CN202127522U (en) | 2011-06-29 | 2011-06-29 | Intermediate frequency power supply closed-loop control system for machining of high-speed railway fastener elastic strip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202127522U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108073111A (en) * | 2018-01-10 | 2018-05-25 | 安徽省巢湖铸造厂有限责任公司 | The intermediate frequency closed-loop control system of spring blank heating |
| CN110262592A (en) * | 2019-06-27 | 2019-09-20 | 中国铁建重工集团股份有限公司 | Elastic strip heating method, system and equipment and computer readable storage medium |
-
2011
- 2011-06-29 CN CN2011202247903U patent/CN202127522U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108073111A (en) * | 2018-01-10 | 2018-05-25 | 安徽省巢湖铸造厂有限责任公司 | The intermediate frequency closed-loop control system of spring blank heating |
| CN110262592A (en) * | 2019-06-27 | 2019-09-20 | 中国铁建重工集团股份有限公司 | Elastic strip heating method, system and equipment and computer readable storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20190084073A1 (en) | Sic inverted plasma cutting power supply | |
| CN204142935U (en) | The environment-friendly battery checkout equipment of efficient electricity-saving type | |
| CN101814765A (en) | Power supply control system of bidirectional electric automobile charger | |
| CN105486101B (en) | A kind of controllable inversion high temperature furnace | |
| CN202127522U (en) | Intermediate frequency power supply closed-loop control system for machining of high-speed railway fastener elastic strip | |
| CN201078842Y (en) | Alternating current machine electricity economizer | |
| CN101965073A (en) | Electromagnetic induction heating system of plastic machine | |
| CN103647460A (en) | Implementation method for medium-frequency heating power supply of reduction furnace | |
| CN205537168U (en) | Controllable contravariant high temperature furnace | |
| CN204407972U (en) | A kind of novel online uninterrupted variable frequency power supply | |
| CN202309549U (en) | Fuzzy double-closed-loop control phase-shift full-bridge soft-switching IPM (intelligent power module) intelligent potentiostat | |
| CN204206518U (en) | For the digitlization commutation controller of induction heating power | |
| CN110365318B (en) | 12-pulse-wave digital control trigger system for high-power thyristor rectification power supply | |
| CN204290755U (en) | A kind of electronics automatic reverse power supply of N+1 superposition backup | |
| CN103457486B (en) | Stream DC power supply is adjusted in the pressure regulation with anti-lightning strike Anti-surging function | |
| CN203399048U (en) | An optical electrical complementation AC frequency-variable generating and speed-regulating energy-saving device | |
| CN202362684U (en) | Low-voltage electric heating control device | |
| TW591876B (en) | Indirect multi-functional induction machine control device | |
| CN102739021A (en) | General control chip structure for SCR (semiconductor control rectifier) and IGBT (insulated gate bipolar translator) | |
| CN100591179C (en) | A middle-frequency reversion power and its application in middle-frequency inductance heating furnace | |
| CN106559024B (en) | Silicon controlled rectifier driving module | |
| CN203771978U (en) | Full-automatic frequency conversion control type high-temperature ceramic muffle furnace | |
| CN203071863U (en) | Intelligent controller for saving power for electric motor | |
| CN202677121U (en) | General control chip architecture for SCR and IGBT | |
| CN204217149U (en) | A kind of novel air-cooled IGBT induction heating power equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120125 |