CN2569303Y - Magnetizing and demagnetizing controller for magnetic bench of machine tool - Google Patents
Magnetizing and demagnetizing controller for magnetic bench of machine tool Download PDFInfo
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- CN2569303Y CN2569303Y CN02263929.2U CN02263929U CN2569303Y CN 2569303 Y CN2569303 Y CN 2569303Y CN 02263929 U CN02263929 U CN 02263929U CN 2569303 Y CN2569303 Y CN 2569303Y
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- circuit
- magnetizing
- demagnetizing
- microprocessor
- major loop
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 13
- 239000010703 silicon Substances 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 230000004907 flux Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 2
- 230000037406 food intake Effects 0.000 abstract 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000005347 demagnetization Effects 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 229910000828 alnico Inorganic materials 0.000 description 1
- -1 aluminium nickel cobalt Chemical compound 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
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Abstract
The utility model relates to a magnetizing and demagnetizing controller for a magnetic table surface of a machine tool, which is composed of a microprocessor, a main loop of a magnetizing and demagnetizing circuit, a large current detection circuit of the main loop, a power supply synchronization signal ingestion circuit, and a controlled silicon triggering circuit, wherein, the main circuit of the magnetizing and demagnetizing circuit is composed of a main power supply switch, a main loop, a relay, large power controlled silicon, and a magnetizing and demagnetizing coil. The power supply synchronization signal ingestion circuit is formed as follows: an input end is low voltage alternating current which is outputted by a transformer, the low voltage alternating current passes through a current limiting resistor to an operational amplifier to be formed into a square wave signal, and then, the square wave signal passes through the current limiting resistor to arrive at an interruption input port and an I\O port of the microprocessor. The utility model adopts the microprocessor as the core of a device, which is convenient to realize energizing phase power and time control, and favorable magnetizing and demagnetizing effects are achieved.
Description
One, technical field
The utility model relates to a kind of magnetizing/demagnetizing controller, in particular for the magnetizing/demagnetizing controller of lathe magnetic force table top.
Two, background technology
As a kind of universal industrial product, energy-conservation, safe and reliable, high workload efficient and low cost are the main points of design.The conventional operation magnetizing and demagnetizing controller, inner a large amount of high-power buttons, switch, the relay of adopting, the production cost height, volume is big, Heavy Weight, poor reliability, and inconvenient operation.
Three, summary of the invention
The purpose of this utility model is: provide a kind of employing microprocessor as the system core, can realize powering up the control of phase power and time easily, reach and well fill demagnetization effectiveness, but also increased by two cover testing circuits, as big current detection circuit and magnetic flux density testing circuit, increased the reliability and the fail safe of system greatly, and can easily realize and being connected of higher level's machines such as PLC, save a large amount of high-power parts simultaneously, reduced cost.
The utility model is achieved in that the utility model is made up of microprocessor, magnetizing/demagnetizing circuit major loop, the big current detection circuit of major loop, power synchronization signal picked-up circuit and thyristor gating circuit, and wherein magnetizing/demagnetizing circuit major loop is by main power switch, major loop, relay, high-power silicon controlled rectifier with fill degaussion coil and form; Power synchronization signal picked-up circuit composed as follows: input is the low-voltage AC of transformer output, to operational amplifier, is made into square-wave signal through current-limiting resistance, passes through current-limiting resistance again, to the interruption input port of microprocessor and I the O mouth; Thyristor gating circuit is composed as follows: microprocessor I the control signal of O mouth output connect photoelectrical coupler, a line bag that connects the large power triode pulse transformer again, isolate the back by pulse transformer and connect two other line bag of pulse transformer, connect simultaneously and drive two high-power one-way SCRs.
The major loop relay is in normally open at ordinary times, to guarantee that filling degaussion coil is in no electric safe condition.In addition, also can be by increasing relay quantity, in the demagnetization system work of filling that does not increase under the high-power silicon controlled rectifier situation a plurality of passages.When system magnetizes work, microprocessor is according to power supply zero passage synchronizing signal, trigger controllable silicon make major loop pass through as shown in Figure 4 voltage waveform (only to need a half-wave get final product when magnetizing in theory, but effectively to magnetize in order guaranteeing during real work, the control major loop passes through 3 half-waves.)。When work was demagnetized in system, microprocessor was according to power supply zero passage synchronizing signal, triggered controllable silicon and made major loop pass through as shown in Figure 5 voltage waveform, made to fill in the degaussion coil by the descending alternating current of power, made effective demagnetization.
Further improvement of the utility model is: this device has designed the big current detection circuit of major loop, adopt current transformer, the big electric current line of major loop in skeleton, go here and there half-turn or 1 the circle, secondary employing φ 0.25 enamelled wire is around multi-turn, pass through full-wave rectification again, voltage clamping and current limliting, be input to microprocessor I the O mouth.
Further improvement of the utility model also comprises: be provided with the magnetic flux density testing circuit, be made up of Hall element, constant-current source circuit, differential amplifier circuit, voltage comparator.
Characteristics of the present utility model are: provide a kind of microprocessor that adopts as the system core and the convenient control that realizes powering up phase power and time, reach and well fill demagnetization effectiveness, the reliability and the fail safe of system have been increased, having saved a large amount of high-power parts simultaneously, is a kind of energy-conservation, safe and reliable, high workload efficient and magnetizing and demagnetizing controller cheaply.
Four, description of drawings
Fig. 1 is the utility model structured flowchart
Fig. 2 is the utility model power synchronization signal picked-up circuit
Fig. 3 is the utility model thyristor gating circuit
Fig. 4 is the utility model power supply wave shape figure
Power supply wave shape figure when Fig. 5 magnetizes for the utility model
Power supply wave shape figure when Fig. 6 demagnetizes for the utility model
Fig. 7 is the utility model magnetic flux density testing circuit figure
Fig. 8 is the utility model main loop circuit figure
Fig. 9 is the utility model controller main flow chart
Figure 10 is the utility model magnetizing/demagnetizing program control flow chart
(1) controller hardware part
(1) Single Chip Microcomputer (SCM) system (comprising CPU, WTD, EEPROM)
Native system is selected the 89C51 single-chip microcomputer for use, and there are 4KflashROM (enough this instrument be used for stored program) and 128byte RAM in its inside.In order to preserve running parameter, select for use electrically erasable programmable ROM EEPROM24C01A to make additional storage in addition, it is the serial read-write mode, only takies 2 I/O mouths of single-chip microcomputer.
Also adopt 555 oscillating circuits and 74LS123 monostable flipflop in the design, constituted an easy watchdog circuit, make system have self-recovering function.The program fleet even system is interfered, watchdog circuit can make single-chip microcomputer reset, and system is recovered automatically.
(2) power synchronization signal picked-up circuit
For can allow microprocessor control reliably controllable silicon in accordance with regulations phase place open and fill the demagnetization major loop, microprocessor must obtain the zero crossing of AC power exactly, we have designed following power synchronization signal picked-up circuit, input is the 15V alternating current of transformer output, arrive operational amplifier through current-limiting resistance, be made into square-wave signal as shown in the figure, pass through the 3K current-limiting resistance again, to the interruption input port of microprocessor and I the O mouth.
(3) thyristor gating circuit
Microprocessor I the control signal of O mouth output through photoelectrical coupler, pass through a line bag of large power triode pulse transformer again, isolate two other line bag of rear drive pulse transformer by pulse transformer, drive two high-power one-way SCRs (as Fig. 3 thyristor gating circuit) simultaneously.When system magnetizes work, microprocessor is according to power supply zero passage synchronizing signal, trigger controllable silicon make major loop pass through as shown in Figure 4 voltage waveform (only to need a half-wave get final product when magnetizing in theory, but effectively to magnetize in order guaranteeing during real work, the control major loop passes through 3 half-waves.)。When work was demagnetized in system, microprocessor was according to power supply zero passage synchronizing signal, triggered controllable silicon and made major loop pass through as shown in Figure 5 voltage waveform, made to fill in the degaussion coil by the descending alternating current of power, and aluminium nickel cobalt is effectively demagnetized.
(4) the big current detection circuit of major loop
In order to guarantee to confirm whether add big electric current to filling degaussion coil, this device has designed the big current detection circuit of major loop, because need not accurately to measure main circuit power, in order to reduce cost, current transformer adopts the most easy scheme, adopt the 1W transformer framework, the big electric current line of major loop is gone here and there half-turn in skeleton, secondary employing φ 0.25 enamelled wire passes through full-wave rectification again around 3000 circles, voltage clamping and current limliting, be input to microprocessor I the O mouth.Detect main circuit current simultaneously in the microprocessor magnetizing/demagnetizing process, if detect less than the indication that makes mistakes.(5) magnetic flux density testing circuit
The magnetic flux density testing circuit is made up of transducer (linear hall sensor), constant-current source circuit, differential amplifier circuit, voltage comparator.
Constant-current source is used for providing operating current (5mA) to Hall element, because output differs greatly between each Hall element, so, at Hall element current input terminal and current input terminal and 1 Rx, according to the sensor situation adjustment, make transducer identical electromotive force of output under same magnetic flux density, the electromotive force of transducer output is exported to microprocessor I/O mouth through voltage comparator after relatively again after difference is amplified 10 times.As when detecting the magnetic induction of magnetic force platform above 500GS, the magnetic state of promptly having substituted the bad for the good, comparator is output as high level, is output as low level when being lower than 500GS.By this simple detection circuit, microprocessor can detect the magnetizing/demagnetizing state of magnetic force table top exactly like this, guarantees the system safety reliably working.
(6) controlled circuit major loop
Controller magnetizing/demagnetizing circuit major loop is by main power switch, major loop, relay, high-power silicon controlled rectifier (50A) and fill degaussion coil and form.The major loop relay is in normally open at ordinary times, to guarantee that filling degaussion coil is in no electric safe condition.In addition, also can be by increasing relay quantity, in the demagnetization system work of filling that does not increase under the high-power silicon controlled rectifier situation a plurality of passages.Because whole to fill the demagnetization operating time very short, less than 1 second, and whole loop always work electric current can be very not big, moment, maximum was less than 80A, so from cost angle examination, select the one-way SCR of 50A for use.
(7) manual control, panel and keypad and indicator light circuit
Panel control line control machine is pressed the work of key control Apparatus for magnetising or demagnetising, and panel and keypad magnetizes, and for avoiding operator's misoperation, line control machine is provided with three buttons to button with demagnetizing button, public button of middle increase.Have only the publicty effect of working as to press, but again by magnetizing or demagnetizing just operate as normal of button.Indicator light and the corresponding one by one setting of button are selected common light-emitting diode for use, and the control of button and indicator light is finished by the I/O mouth of microprocessor.
(8) with the PLC interface circuit
This controller can also receive PLC control, and PLC digital quantity delivery outlet changes the corresponding I/O mouth of microprocessor level by the control optocoupler, and the microprocessor main flow is constantly inquired about corresponding I/O mouth, makes corresponding operating.After microprocessor is finished one action (magnetize or demagnetize), by I/O control triode adhesive or decontrol relay on the wiring board, the relay normally open normally-closed contact is linked to each other with the digital quantity input port of PLC respectively, PLC has just obtained the operating state of controller.
(9) reliability design of system
1. the microprocessor outside adds Watchdog (house dog) circuit.
2. extensively adopt photoelectricity to isolate in the control circuit.
3. relay line bag connects diode and is used to absorb reverse induced electromotive force.
4. major loop relay contact adjunction antispark electric capacity.
5. when magnetizing and demagnetizing work, software control major loop relay is controlled earlier controllable silicon work again by big electric current after adhesive under the no current situation, so both protected relay contact, guarantees that again relay do not strike sparks the contact in adhesive or when decontroling.
Software section: systems soft ware adopts modularized design, mainly is made up of button demonstration processing module, the module that magnetizes, demagnetization module, various switching value state detection module and error handling processing module etc.The main flow chart of software is shown in Fig. 9,10.
Claims (4)
1, a kind of magnetizing/demagnetizing controller that is used for lathe magnetic force table top, it is characterized in that being made up of microprocessor, magnetizing/demagnetizing circuit major loop, the big current detection circuit of major loop, power synchronization signal picked-up circuit and thyristor gating circuit, wherein magnetizing/demagnetizing circuit major loop is by main power switch, major loop, relay, high-power silicon controlled rectifier with fill degaussion coil and form; Power synchronization signal picked-up circuit composed as follows: input is the low-voltage AC of transformer output, to operational amplifier, is made into square-wave signal through current-limiting resistance, passes through current-limiting resistance again, to the interruption input port of microprocessor and I the O mouth; Thyristor gating circuit is composed as follows: microprocessor I the control signal of O mouth output connect photoelectrical coupler, a line bag that connects the large power triode pulse transformer again, isolate the back by pulse transformer and connect two other line bag of pulse transformer, connect simultaneously and drive two high-power one-way SCRs.
2, by the described magnetizing/demagnetizing controller of claim 1, it is characterized in that being provided with a plurality of relays, to the magnetising or demagnetising apparatus work of a plurality of passages.
3, by the described magnetizing/demagnetizing controller of claim 1, it is characterized in that being provided with the big current detection circuit of major loop, the big current detection circuit of major loop adopts current transformer, the big electric current line of major loop in skeleton, go here and there half-turn or 1 the circle, secondary employing φ 0.25 enamelled wire is around multi-turn, pass through full-wave rectifying circuit again, voltage clamping and current-limiting circuit, be connected to microprocessor I the O mouth.
4, by the described magnetizing/demagnetizing controller of claim 1, it is characterized in that being provided with in addition the magnetic flux density testing circuit, the magnetic flux density testing circuit is made up of Hall element, constant-current source circuit, differential amplifier circuit, voltage comparator circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02263929.2U CN2569303Y (en) | 2002-08-26 | 2002-08-26 | Magnetizing and demagnetizing controller for magnetic bench of machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02263929.2U CN2569303Y (en) | 2002-08-26 | 2002-08-26 | Magnetizing and demagnetizing controller for magnetic bench of machine tool |
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| Publication Number | Publication Date |
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| CN2569303Y true CN2569303Y (en) | 2003-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02263929.2U Expired - Fee Related CN2569303Y (en) | 2002-08-26 | 2002-08-26 | Magnetizing and demagnetizing controller for magnetic bench of machine tool |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968647A (en) * | 2010-09-13 | 2011-02-09 | 江南大学 | Embedded wireless intelligent electromagnetic chuck magnetizing and demagnetizing control system |
| CN102087906A (en) * | 2009-12-08 | 2011-06-08 | 三环瓦克华（北京）磁性器件有限公司 | Magnetizing apparatus non-magnetizing alarm device and magnetizing apparatus with same |
| CN102403086A (en) * | 2010-09-07 | 2012-04-04 | 中国石油天然气集团公司 | Pipeline port hysteresis buffer demagnetizer |
| CN102403083A (en) * | 2010-09-07 | 2012-04-04 | 中国石油天然气集团公司 | Pipeline port hysteresis buffer demagnetization method and demagnetizer |
| CN104661170A (en) * | 2015-03-09 | 2015-05-27 | 山东省计算中心（国家超级计算济南中心） | Fault detection system for multiple speakers |
| CN111509917A (en) * | 2020-03-31 | 2020-08-07 | 江苏大学 | Magnetizing and demagnetizing control device and method for permanent magnet synchronous motor |
-
2002
- 2002-08-26 CN CN02263929.2U patent/CN2569303Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087906A (en) * | 2009-12-08 | 2011-06-08 | 三环瓦克华（北京）磁性器件有限公司 | Magnetizing apparatus non-magnetizing alarm device and magnetizing apparatus with same |
| CN102087906B (en) * | 2009-12-08 | 2015-02-11 | 三环瓦克华（北京）磁性器件有限公司 | Magnetizing apparatus non-magnetizing alarm device and magnetizing apparatus with same |
| CN102403086A (en) * | 2010-09-07 | 2012-04-04 | 中国石油天然气集团公司 | Pipeline port hysteresis buffer demagnetizer |
| CN102403083A (en) * | 2010-09-07 | 2012-04-04 | 中国石油天然气集团公司 | Pipeline port hysteresis buffer demagnetization method and demagnetizer |
| CN102403083B (en) * | 2010-09-07 | 2013-07-31 | 中国石油天然气集团公司 | Pipeline port hysteresis buffer demagnetization method and demagnetizer |
| CN102403086B (en) * | 2010-09-07 | 2013-07-31 | 中国石油天然气集团公司 | Pipeline port hysteresis buffer demagnetizer |
| CN101968647A (en) * | 2010-09-13 | 2011-02-09 | 江南大学 | Embedded wireless intelligent electromagnetic chuck magnetizing and demagnetizing control system |
| CN104661170A (en) * | 2015-03-09 | 2015-05-27 | 山东省计算中心（国家超级计算济南中心） | Fault detection system for multiple speakers |
| CN111509917A (en) * | 2020-03-31 | 2020-08-07 | 江苏大学 | Magnetizing and demagnetizing control device and method for permanent magnet synchronous motor |
| CN111509917B (en) * | 2020-03-31 | 2021-06-18 | 江苏大学 | Magnetizing and demagnetizing control device and method for permanent magnet synchronous motor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |