CN109085419A - Magnet charger magnetizes peak point current measurement method and device - Google Patents
Magnet charger magnetizes peak point current measurement method and device Download PDFInfo
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- CN109085419A CN109085419A CN201811043943.7A CN201811043943A CN109085419A CN 109085419 A CN109085419 A CN 109085419A CN 201811043943 A CN201811043943 A CN 201811043943A CN 109085419 A CN109085419 A CN 109085419A
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- current
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- magnet charger
- voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/02—Measuring characteristics of individual pulses, e.g. deviation from pulse flatness, rise time or duration
- G01R29/023—Measuring pulse width
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- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
It magnetizes peak point current measurement method and device the invention discloses a kind of magnet charger.The present invention connects a current sensor on the circuit between magnet charger and magnetizing coil, and the size and width of peak point current are measured by the current measurement circuit system that magnetizes.The detection method and circuit that design through the invention realize that magnet charger magnetizes peak point current on-line measurement function, improves the precision control to the magnet steel amount of magnetizing, reduces the security risk in magnetization process.
Description
Technical field
The invention belongs to electronic surveying and inspection technology field, be related to a kind of magnet charger magnetize peak point current measurement method and
Device.
Background technique
Magnet charger is essential key equipment during producing and developing various permanent magnet devices, is widely used in
The every field such as small and special electric machine, instrument and meter, consumer electronics, medical instrument and daily industry.After magnet charger magnetizes, permanent magnetism material
The magnetic field parameter of material and distribution directly affect its runnability, with the raising of the degree of automation and electronics, computer, high-new
The development of technology and other field needs uniform and stable magnetic field, to magnetic field in larger medical instrument and commercial measurement
Stability and uniformity requirement are high, this not only there are certain requirements permanent-magnet material, with greater need for magnet charger magnetize electric current into
The accurate control of row.Therefore, particularly important to the current detecting of magnet charger.
The working principle of magnet charger mainly charges high direct voltage electric current to capacitor, then has by one small
The coil discharge of resistance obtains a peak-peak up to tens of thousands of amperes of peak current.The electric current generates one in coil
Powerful magnetic field, to make to be placed in the magnetic material magnetization in coil.For the material of different magnetic requirements, the peak value electricity of magnet charger
The size and width of stream be not also identical, and the two parameters directly determine the magnetic flux of magnet steel.
Summary of the invention
The present invention is excessive for existing magnet charger peak pulse current, lacks electric current automatic detection function, there are biggish
The problems such as security risk, proposes a kind of method of magnet charger peak point current precise measurement, devises associated peak current detection
Circuit detects magnet charger peak current level and width, obtains the dynamic characteristic for the pulse current that magnetizes.
The technical solution adopted for solving the technical problem of the present invention are as follows:
The present invention provides a kind of magnet charger peak point current measurement method and device, the device mainly include magnet charger module, magnetize
Coil module, current sensor module, magnetize current measurement circuit system.It is gone here and there on circuit between magnet charger and magnetizing coil
Join a current sensor, is obtained by the peak point current and spike width for the current measurement circuit systematic survey current sensor that magnetizes
To the peak point current dynamic characteristic of magnet charger.
Magnet charger peak point current measurement method mainly devises electric current conversion voltage in the current measurement circuit system that magnetizes
Module, peak holding circuit module, AD detection module, high-speed AD detection module, CPLD system, external RAM, MCU single-chip microcontroller system
System, host computer and communication system.Specific measurement method is to turn voltage module through overcurrent, and the electric current of current sensor is converted into
Voltage preserves current peak voltage by peak holding circuit, then reads crest voltage to list by AD detection module
Piece machine is further processed, and can only obtain maximum peak voltage since AD detection module sample frequency is lower.Another high-speed AD detection
Module obtains the waveform of discharge current using the AD sampled measurements of high speed.CPLD is stored temporarily in the AD conversion digital quantity of measurement
In external RAM system, the data for being stored in ram system are transferred to single-chip microcontroller by CPLD system after measurement.Single-chip microcontroller according to
The peak L AD of AD detection module sampling, is modified the high speed AD sampling value Gad [i] of acquisition, i.e. Gad [i] * LAD/
Gadmax, wherein Gadmax is the maximum value of high speed AD sampling value Gad [i], then according to revised high-speed sampling value, is calculated
The size and width of peak point current out.
It magnetizes peak point current measurement method and device the beneficial effects of the present invention are: magnet charger of the invention, it can be right
Magnet charger peak point current and width carry out precise measurement, and reducing leads to equipment damage because peak point current is excessive.Pass through high speed
AD detection and CPLD system are modified the magnet charger peak inrush current that magnetizes, and accurately to magnetize to magnetic material, reduce
Energy consumption has saved cost.
Detailed description of the invention
Fig. 1 is that magnet charger magnetizes peak point current measuring device entire block diagram；
Fig. 2 is that magnet charger magnetizes peak-current signal schematic diagram；
Fig. 3 is that magnet charger magnetizes peak point current measuring system module connection diagram；
Fig. 4 is that the magnet charger peak point current measuring system that magnetizes specifically connects circuit diagram；
Fig. 5 is peak point current conversion voltage, the specific connection figure of peak holding circuit.
Specific embodiment
More clearly to express the present invention, it is described further below in conjunction with attached drawing.
Fig. 1 is that magnet charger magnetizes peak point current measuring device entire block diagram.As shown in Figure 1, in magnet charger and magnetizing coil
Circuit on connect a current sensor, the electric current of current sensor is flowed through by current measurement circuit measurement of magnetizing, thus
The electric current of magnet charger is obtained, current sensor shielding case and the current measurement circuit that magnetizes are grounded jointly reduces external interference.
Fig. 2 is that magnet charger magnetizes peak-current signal schematic diagram.When magnet charger work, the electric current of generation as shown in Fig. 2,
Magnet charger magnetize current spike peak value be peak amplitude, spike pulsewidth be D.Peak amplitude is obtained by AD detection module measurement
LAD obtains charging current waveform by high-speed AD detection module, according to continuous nonzero value in high speed AD sampling value Gad [i] array
Quantity and sample frequency, so as to which spike pulsewidth D is calculated.
Fig. 3 is that magnet charger magnetizes peak point current measuring system module connection diagram.As shown in Fig. 2, peak point current measures
System mainly includes current sensor, peak holding circuit module, AD detection module, high-speed AD detection module, CPLD system, outer
Portion's ram system, MCU SCM system, host computer and 485 communication systems.The electric current for flowing through current sensor first passes through electric current and turns
Potential circuit is converted into crest voltage, then is conveyed to peak holding circuit, directly passes through ADC(12 all the way) conversion circuit is direct
To single-chip microcontroller, further processing is waited；After another way is by high-speed ADC (24) conversions, crest voltage is conveyed to
CPLD system, single-chip microcontroller are modified maximum peak voltage by CPLD, and the dynamic characteristic for the electric current that magnetizes is stored in outside
In portion's ram system, the end PC host computer is configured the correlation peak corrected parameter that single-chip microcontroller stores by 485 communications.
Fig. 4 magnet charger peak point current measuring system that magnetizes specifically connects circuit diagram.As shown, region 1 be single-chip microcontroller most
Mini system module, the single-chip microcontroller model of U10 select the MSP430F437 chip of TI, wherein the end AVcc, DVcc of U10 and capacitor
The anode of CD10, one end of capacitor C10, power vd D are directly connected to；The cathode of CD10, capacitor C10 the other end with digitally
DGND connection；The end RST of U10 is connect with one end of one end of resistance R10, capacitor C11；The other end and power vd D of resistance R10
Connection, the other end of capacitor C11 are connect with digitally DGND；The end XIN of U10 and one end of crystal oscillator X10, one end of capacitor C12
Connection；The end XOUT of U10 is connect with one end of the other end of crystal oscillator X10, capacitor C13；The other end of capacitor C12, capacitor C13
The other end is connect with digitally DGND；The end serial ports TXD0, the end RXD0 of U10 is connect with 485 communication modules, and single-chip microcontroller passes through 485
Communication is communicated with the end PC host computer；The end SCLK of the A/D chip U11 at the end P1.1 and region 2 of U10 is connect；The P1.2 of U10
End is connect with the end CS of the A/D chip U11 in region 2；；The end DIN of the A/D chip U11 at the end P1.3 and region 2 of U10 is connect;U10
The end P1.4 connect with the end DOUT of the A/D chip U11 in region 2；The end rxd1 of U10 is connect with the end tx of CPLD system；U10's
The end P2.1 is connect with the end rst of CPLD system；The end P2.0 of U10 is connect with the end read of CPLD system.
Region 2 is ADC conversion circuit module；The A/D chip of U11 selects AD7799 chip, wherein the end SCLK of U11 and list
The P1.1 connection of piece machine U10；The end CS of U11 is connect with the P1.2 of single-chip microcontroller U10；The end DIN of U11 and the P1.3 of single-chip microcontroller U10
Connection；The end DOUT of U11 is connect with the P1.4 of single-chip microcontroller U10；The end AIN1+, the end AIN1- of U11 is kept with current peak respectively
Circuit connection；The end GND of U11 is connect with simulation ground AGND；The end AVdd, the end DVdd of U11 is connect with power supply vdd terminal；U11's
The end PSW, the end REF- are connect with the anode of one end of capacitor C14, zener diode Z10；The end REF+ of U11 is another with capacitor C14's
One end connection of one end, the cathode of zener diode Z10, resistance R11；The other end of resistance R11 and one end of power vd D connect
It connects.
Fig. 5 is peak point current conversion voltage, the specific connection figure of peak holding circuit.As shown in figure 4, region 3 is that electric current turns
Voltage module is changed, wherein one end of current sensor is connect with one end of resistance R20；The other end and TVS diode of resistance R20
One end connection of one end, resistance R21 of Z20；The other end of TVS diode Z20 and the other end, the simulation ground of current sensor
The connection of the end AGND；The other end of resistance R21 is connect with the end IN+ of one end of resistance R22, amplifier U20；The other end and mould of R22
The AGND connection of quasi- ground.
Region 4 is peak holding circuit, wherein amplifier U20 select high-precision, high speed, low noise operational amplifier chip
OP07 chip is as voltage follower.Specific connection type is that the end IN+ of U20 is connect with one end of the resistance R21 in region 3；U20
The anode of the end IN- and diode D20 connect；The vdd terminal and the anode of capacitor CD20, one end of capacitor C20, power vd D of U20
End connection；The other end of capacitor CD20 is connect with the other end of capacitor C20, simulation ground AGND；The end VSS of U20 is with resistance R23's
One end, simulation ground AGND connection；U20 /end EN of the end SD and single-chip microcontroller connects；The cathode of the OUT terminal of U20 and diode D20,
The anode connection of the other end, diode D21 of R23；The cathode of diode D21 is connect with one end of resistance R24；Resistance R24's
The other end and one end of resistance R25, one end of resistance R26, one end of capacitor C21, the end AIN1+ of A/D chip, capacitor CD21
Anode connection；The other end of resistance R26 is connect with the other end of capacitor C21, the simulation ground end AGND；The cathode and mould of capacitor CD21
The connection of the quasi- ground end AGND；The other end of resistance R25 is connect with one end of one end of resistance R27, key S20；Resistance R27's is another
End is connect with the end OUT2 of high speed photo coupling chip U21；The other end of key S20 and the end OUT1, the simulation ground of high speed photo coupling U21
AGND connection；The end A of U21 and one end of discharge control terminal connect；The C-terminal of U21 is connect with one end of resistance R28；Resistance R28's
The other end and the other end of discharge control terminal connect.
Holding circuit is isolated with signal as voltage follower by amplifier U20 in peak holding circuit, while can be into
The impedance matching of row front stage signal.TVS pipe Z20 in region 3 is mainly used to prevent crest voltage excessive, damages operation amplifier
Device.R21 and R22 in proportion divides peak signal, in the voltage that the IN+ input terminal input amplitude of U20 becomes smaller.Amplifier U20 it
Diode D21 and capacitor CD21 afterwards constitutes a peak holding circuit.It can be on capacitor CD21 by discharge control terminal
Voltage carries out discharge treatment.
Claims (2)
- The peak point current measurement method 1. magnet charger magnetizes, feature include: to go here and there on circuit between magnet charger and magnetizing coil Join a current sensor, capacitance discharge current in magnet charger be passed to magnet charger measuring circuit, turns voltage module through overcurrent, The electric current of current sensor is converted into voltage, current peak voltage is preserved by peak holding circuit, then pass through AD Detection module reads crest voltage and is further processed to single-chip microcontroller；Another high-speed AD detection module reads current sensor voltage, The dynamic characteristic for the electric current that magnetizes is stored temporarily in external RAM system by CPLD, CPLD system will store after measurement It is transferred to single-chip microcontroller in the data of ram system, single-chip microcontroller is modified the dynamic characteristic of the peak point current of measurement, to calculate The size and width of peak point current out.
- The circuit of peak point current measurement method 2. realization magnet charger described in claim 1 magnetizes, it is characterised in that: it includes electricity Flow sensor, electric current turn voltage module, peak holding circuit module, low speed AD detection module, high-speed AD detection module, CPLD, RAM module and single-chip microcontroller；Current sensor access electric current turns voltage module and exports corresponding voltage signal, connects high-speed AD detection module；And pass through Peak holding circuit obtains peak signal, connects low speed AD detection module；High-speed AD detection module connects CPLD, by the dynamic of acquisition State peak information transfer carries out data storage to CPLD, by CPLD control RAM module, after measurement, by CPLD by RAM mould Data, which extract, in block is transferred to single-chip microcontroller；Low speed AD detection module connects single-chip microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811043943.7A CN109085419B (en) | 2018-09-07 | 2018-09-07 | Magnetizing peak current measuring method and device for magnetizing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811043943.7A CN109085419B (en) | 2018-09-07 | 2018-09-07 | Magnetizing peak current measuring method and device for magnetizing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109085419A true CN109085419A (en) | 2018-12-25 |
| CN109085419B CN109085419B (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811043943.7A Active CN109085419B (en) | 2018-09-07 | 2018-09-07 | Magnetizing peak current measuring method and device for magnetizing machine |
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Citations (8)
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|---|---|---|---|---|
| JP2000149394A (en) * | 1998-11-12 | 2000-05-30 | Matsushita Electric Ind Co Ltd | Disk device with motor, and motor |
| JP2004251856A (en) * | 2003-02-21 | 2004-09-09 | Espec Corp | Measuring instrument |
| 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 |
| CN102323516A (en) * | 2011-09-06 | 2012-01-18 | 中国电力科学研究院 | Traveling wave distance measurement device based on passive magnetooptic glass current transformer principle |
| JP2016018574A (en) * | 2014-07-07 | 2016-02-01 | 日本放送協会 | Magnetic recording medium device and magnetic recording reproduction method, and spatial optical modulator and pixel driving method thereof |
| CN106321086A (en) * | 2015-07-02 | 2017-01-11 | 中石化石油工程技术服务有限公司 | Transient measurement method for barefoot well formation resistivity |
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2018
- 2018-09-07 CN CN201811043943.7A patent/CN109085419B/en active Active
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| JP2000149394A (en) * | 1998-11-12 | 2000-05-30 | Matsushita Electric Ind Co Ltd | Disk device with motor, and motor |
| JP2004251856A (en) * | 2003-02-21 | 2004-09-09 | Espec Corp | Measuring instrument |
| 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 |
| CN102323516A (en) * | 2011-09-06 | 2012-01-18 | 中国电力科学研究院 | Traveling wave distance measurement device based on passive magnetooptic glass current transformer principle |
| JP2016018574A (en) * | 2014-07-07 | 2016-02-01 | 日本放送協会 | Magnetic recording medium device and magnetic recording reproduction method, and spatial optical modulator and pixel driving method thereof |
| CN106321086A (en) * | 2015-07-02 | 2017-01-11 | 中石化石油工程技术服务有限公司 | Transient measurement method for barefoot well formation resistivity |
| US20170115328A1 (en) * | 2015-10-26 | 2017-04-27 | Hioki Denki Kabushiki Kaisha | Current sensor and measuring apparatus |
| CN206459686U (en) * | 2017-02-23 | 2017-09-01 | 台达电子工业股份有限公司 | Encoder |
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| "SCR530伏-4000安可控硅脉冲充磁机研制报告", 电机与控制应用, no. 05 * |
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| CN109085419B (en) | 2023-09-29 |
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