CN104619058B - For the induction heating power binary coil method for independently controlling that polycrystalline silicon ingot casting is purified - Google Patents
For the induction heating power binary coil method for independently controlling that polycrystalline silicon ingot casting is purified Download PDFInfo
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- CN104619058B CN104619058B CN201410785626.8A CN201410785626A CN104619058B CN 104619058 B CN104619058 B CN 104619058B CN 201410785626 A CN201410785626 A CN 201410785626A CN 104619058 B CN104619058 B CN 104619058B
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Abstract
For the induction heating power binary coil method for independently controlling that polycrystalline silicon ingot casting is purified, relate to induction heating power technical field, specifically, relate to a kind of for polycrystalline silicon ingot or purifying furnace purification induction heating power control method.For upper and lower two coil heats, lower coil is served as theme circle, and upper coil is from coil, comprises following steps: gather master and slave coil signal; Gather the voltage signal of resonant inductance, resonant capacitance, according to the magnitude of voltage gathered, obtain adjustment direction and the size of frequency; Calculate resonance frequency; Calculate master and slave coil power, control register parameter is set; Detect principal and subordinate's coil power output relation, reset control register parameter.Like this can conserve energy, raise the efficiency; The energy that thermal field consumes can be reduced again, improve the useful life of thermal field.
Description
Technical field
The present invention relates to induction heating power technical field, specifically, relate to a kind of control method for polycrystalline silicon ingot or purifying furnace purification induction heating power.
Background technology
Induction heating power is the electric current being produced alternation by rectification, inverter circuit, thus produces the magnetic field of alternation, and recycling alternating magnetic field produces the device that eddy current reaches heating effect.Utilize the amplitude-frequency characteristic of inductance capacitance (LC) oscillating circuit, the resonance frequency by changing inductance capacitance (LC) oscillating circuit changes the power output of induction heating power fast, thus changes workpiece surface temperature fast.In view of " kelvin effect " characteristic of induction heating, when frequency is larger, skin depth is more shallow, its AC impedance is larger simultaneously, therefore, under the function of current of identical numerical value, the energy that load obtains is also higher, and line loss will reduce accordingly, thus improve the efficiency of heating surface, also can play the object of saves energy simultaneously.
At present, the thermal field in partial polysilicon ingot furnace is designed to upper and lower two coil heats, and the heating power of two coils requires independent control, thus requires that the independence realizing induction heating power binary coil controls.According to the technological requirement of ingot furnace, set different power, induction heating power is according to the power signal received, and export the power needed, the power signal received because of upper lower coil is incomplete same, therefore needs independent control.Now define lower coil to serve as theme circle, upper coil is from coil.
At present, in general the induction heating power of twin coil is all parallel operation, both an Energy control two coils, two coils from parallel connection of coils work, and the independence that cannot realize twin coil controls.Because two coils are completely independently from circuit, but because of its distance near especially, according to the principle of faraday electromagnetic induction, we know, from magnetic circuit main coil and the contact still having magnetic circuit from coil.This independence just causing us cannot realize two coils controls, and also just cannot meet the technological requirement that polycrystalline silicon ingot casting purification induction heating power binary coil independently controls.
Summary of the invention
According to above the deficiencies in the prior art, the present invention proposes a kind of method independently controlled for polycrystalline silicon ingot casting purification induction heating power binary coil, in binary coil different capacity demand process, according to the difference of power difference, when maintaining certain minimum output power, independently follow respective power given, realize again same frequency control, same-phase control simultaneously, both realized the control with frequency homophase different capacity.
Technical scheme of the present invention is as follows:
Gather master and slave coil signal, obtain current induction heating power corresponding be main coil or from coil; Gather the voltage signal of resonant inductance, resonant capacitance, according to the magnitude of voltage gathered, obtain adjustment direction and the size of frequency; Calculate resonance frequency; Calculate master and slave coil power, control register parameter is set; Detect principal and subordinate's coil power output relation, reset control register parameter.The flow process of this technical scheme as shown in Figure 1.
The first step: gather master and slave coil signal, obtain current induction heating power corresponding be main coil or from coil;
Second step: according to the result of determination of the first step, if main coil, gathers the resonant inductance voltage signal U after voltage transformer isolation
l, resonant capacitor voltage signal U
c, the sample frequency that AD gathers is 10kHz;
3rd step: the voltage signal U collected according to second step
lwith U
camplitude, phase relation, judge that whether current induction heating power is at resonance point.If at resonance point, then carry out next step operation; If not at resonance point, then according to voltage signal U
lwith U
camplitude, calculate the variable signal F of frequency
Δ, comprise amplitude and direction; According to the service frequency signal F of current induction heating power
c, and the frequency variation signal F determined
Δ, calculate resonance point, determine the frequency F needing to export
n; The minimum adjustment numerical value of frequency is 0.1Hz, and the Computing Principle of resonance frequency as shown in Figure 2;
4th step: the output voltage signal U gathering induction heating power main coil
f-Zwith output current signal I
f-Z, according to the current output voltage current signal U collected
f-Zand I
f-Z, calculate the real output P that main coil is current
oUT-Z; Current real output P
oUT-Zcomputing Principle such as Fig. 3 shows;
5th step: the real output P gone out according to four-step calculation
oUT-Z, the target output P that obtains of communication
iN-Z, calculate the power output Δ P needing adjustment
z; According to the output frequency F that the 3rd step calculates
n, in conjunction with the power output Δ P of the current needs adjustment calculated
z, the control register parameter of main coil is set;
6th step: according to the result of determination of the first step, if from coil, gathers the output voltage signal U of induction heating power from coil
f-Cwith output current signal I
f-C, according to the current output voltage, the current signal U that collect
f-Cand I
f-C, calculate from the current real output P of coil
oUT-C; Current real output P
oUT-Ccomputing Principle such as Fig. 3 shows;
7th step: according to the 6th step calculate from coil real output P
oUT-C, the target output P that obtains of communication
iN-C, calculate the power output Δ P needing adjustment
c; According to the output frequency that the 3rd step calculates, in conjunction with the power output Δ P of the current needs adjustment calculated
c, arrange from coil control register parameter;
8th step: according to the power output P of principal and subordinate's coil that the 4th step, the 6th step calculate
oUT-Z, P
oUT-C, and the power output Δ P of needs adjustment that the 5th step, the 7th step calculate
z, Δ P
c, determine whether the power output of two coils meets the condition that works alone, if met, then continue next step operation; If do not met, then judge current power level, according to current power grade, confirm that principal and subordinate's coil allows the maximum power difference DELTA PMAX exported, according to the maximum power difference DELTA PMAX allowed, reset principal and subordinate's coil control register parameter; Its flow process as shown in Figure 4.
The independence that the program achieves the induction heating power binary coil of purifying for polycrystalline silicon ingot casting controls, and has better met process requirements, has further saved energy.Like this can conserve energy, raise the efficiency; The energy that thermal field consumes can be reduced again, improve the useful life of thermal field.
Accompanying drawing explanation
The flow chart of Fig. 1 induction heating power binary coil method for independently controlling for polycrystalline silicon ingot casting purification of the present invention.
Fig. 2 resonance frequency calculates schematic diagram.
Fig. 3 real output schematic diagram calculation.
Fig. 4 resets principal and subordinate's coil control register parameter flow chart.
Claims (10)
1. for the induction heating power binary coil method for independently controlling that polycrystalline silicon ingot casting is purified, be upper and lower two coil heats, lower coil is served as theme circle, and upper coil is from coil, and its feature comprises following steps:
The first step, gathers master and slave coil signal;
Second step, gathers the voltage signal of resonant inductance, resonant capacitance, according to the magnitude of voltage gathered, obtains adjustment direction and the size of resonance frequency;
3rd step, according to the resonant inductance voltage signal U that second step gathers
lwith resonant capacitor voltage signal U
camplitude, phase relation, judge that whether current induction heating power is at resonance point;
If at resonance point, then carry out FOUR EASY STEPS;
If not at resonance point, then according to resonant inductance voltage signal U
lwith resonant capacitor voltage signal U
camplitude, calculate the variable signal F of frequency
△, comprise amplitude and direction; According to the service frequency signal F of current induction heating power
c, and the frequency variation signal F determined
△, calculate resonance point, determine the frequency F needing to export
n;
4th step, calculates master and slave coil power, arranges control register parameter;
5th step, detects principal and subordinate's coil power output relation, resets control register parameter.
2. control method according to claim 1, if it is characterized in that main coil, gathers the resonant inductance voltage signal U after voltage transformer isolation
l, resonant capacitor voltage signal U
c, the sample frequency that AD gathers is 10kHz.
3. control method according to claim 1, is characterized in that adjusting frequency as being more than or equal to 0.1Hz of resonance frequency.
4. control method according to claim 1, is characterized in that the output voltage signal U gathering induction heating power main coil
f-Zwith output current signal I
f-Z, calculate the real output P that main coil is current
oUT-Z.
5. control method according to claim 4, is characterized in that the real output P according to calculating
oUT-Z, the target output P that obtains of communication
iN-Z, calculate the power output △ P needing adjustment
z; According to the output frequency F calculated
n, in conjunction with the power output △ P of the current needs adjustment calculated
z, the control register parameter of main coil is set.
6. control method according to claim 1, if it is characterized in that from coil, gathers the output voltage signal U of induction heating power from coil
f-Cwith output current signal I
f-C, calculate from the current real output P of coil
oUT-C.
7. control method according to claim 6, is characterized in that basis is from coil real output P
oUT-C, the target output P that obtains of communication
iN-C, calculate the power output △ P needing adjustment
c; According to the output frequency F calculated
n, in conjunction with the power output △ P of the current needs adjustment calculated
c, arrange from coil control register parameter.
8. control method according to claim 5, is characterized in that the power output P according to the main coil calculated
oUT-Z, and the power output △ P of the needs adjustment calculated
z, determine the power output of main coil.
9. control method according to claim 7, is characterized in that the power output P from coil according to calculating
oUT-C, and the power output △ P of the needs adjustment calculated
c, determine the power output from coil.
10. control method according to claim 9, is characterized in that according to current power grade, confirms that principal and subordinate's coil allows the maximum power difference △ PMAX exported, and according to the maximum power difference △ PMAX allowed, resets principal and subordinate's coil control register parameter.
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| CN201410785626.8A CN104619058B (en) | 2014-12-17 | 2014-12-17 | For the induction heating power binary coil method for independently controlling that polycrystalline silicon ingot casting is purified |
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| CN104619058B true CN104619058B (en) | 2016-04-27 |
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| CN101394692A (en) * | 2002-06-26 | 2009-03-25 | 三井造船株式会社 | Induction heating method |
| CN102652460A (en) * | 2009-12-11 | 2012-08-29 | 松下电器产业株式会社 | Induction heating apparatus and induction heating cooker provided with same |
| CN102984837A (en) * | 2012-12-10 | 2013-03-20 | 广东澳得科技股份有限公司 | Energy-saving multifrequency electromagnetic induction heating device |
| CN103069921A (en) * | 2010-08-09 | 2013-04-24 | 三井造船株式会社 | Induction heating apparatus and induction heating method |
| WO2013064332A1 (en) * | 2011-11-03 | 2013-05-10 | Arcelik Anonim Sirketi | An induction heating cooker |
| CN103416105A (en) * | 2011-12-28 | 2013-11-27 | 松下电器产业株式会社 | Induction heating cooker |
-
2014
- 2014-12-17 CN CN201410785626.8A patent/CN104619058B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101394692A (en) * | 2002-06-26 | 2009-03-25 | 三井造船株式会社 | Induction heating method |
| CN102652460A (en) * | 2009-12-11 | 2012-08-29 | 松下电器产业株式会社 | Induction heating apparatus and induction heating cooker provided with same |
| CN103069921A (en) * | 2010-08-09 | 2013-04-24 | 三井造船株式会社 | Induction heating apparatus and induction heating method |
| WO2013064332A1 (en) * | 2011-11-03 | 2013-05-10 | Arcelik Anonim Sirketi | An induction heating cooker |
| CN103416105A (en) * | 2011-12-28 | 2013-11-27 | 松下电器产业株式会社 | Induction heating cooker |
| CN102984837A (en) * | 2012-12-10 | 2013-03-20 | 广东澳得科技股份有限公司 | Energy-saving multifrequency electromagnetic induction heating device |
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