CN203734864U - Induction heating power supply of cored galvanized pot - Google Patents
Induction heating power supply of cored galvanized pot Download PDFInfo
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- CN203734864U CN203734864U CN201320888705.2U CN201320888705U CN203734864U CN 203734864 U CN203734864 U CN 203734864U CN 201320888705 U CN201320888705 U CN 201320888705U CN 203734864 U CN203734864 U CN 203734864U
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- inversion
- controllable silicon
- silicon scr
- scr4
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- 230000006698 induction Effects 0.000 title claims abstract description 42
- 238000010438 heat treatment Methods 0.000 title claims abstract description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 66
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 66
- 239000010703 silicon Substances 0.000 claims abstract description 66
- 239000003990 capacitor Substances 0.000 claims abstract description 15
- 230000002459 sustained effect Effects 0.000 claims description 11
- 238000004804 winding Methods 0.000 claims description 11
- 230000001681 protective effect Effects 0.000 claims description 6
- 101100365087 Arabidopsis thaliana SCRA gene Proteins 0.000 abstract description 6
- 101150105073 SCR1 gene Proteins 0.000 abstract description 6
- 101100134054 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) NTG1 gene Proteins 0.000 abstract description 6
- 101000668170 Homo sapiens RNA-binding motif, single-stranded-interacting protein 2 Proteins 0.000 abstract description 5
- 102100039690 RNA-binding motif, single-stranded-interacting protein 2 Human genes 0.000 abstract description 5
- 101000668165 Homo sapiens RNA-binding motif, single-stranded-interacting protein 1 Proteins 0.000 abstract description 4
- 102100039692 RNA-binding motif, single-stranded-interacting protein 1 Human genes 0.000 abstract description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 6
- 239000011701 zinc Substances 0.000 description 6
- 229910052725 zinc Inorganic materials 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000035772 mutation Effects 0.000 description 2
- 238000000819 phase cycle Methods 0.000 description 2
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009394 selective breeding Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Abstract
The utility model discloses an induction heating power supply of a cored galvanized pot. The power supply comprises a main circuit and a master control unit. The main circuit comprises a rectifier, a filter, an inverter, and an induction coil. The inverter forms a full-bridge series resonant circuit by four inversion silicon controlled rectifiers SCR1 to SCR4 and an inversion electrothermal capacitor C2. The four inversion silicon controlled rectifiers SCR1 to SCR4 are connected with a filter capacitor C1 of a filter in a manner that the inversion silicon controlled rectifier SCR1 is connected in series with the inversion silicon controlled rectifier SCR3, and the inversion silicon controlled rectifier SCR2 is connected in series with the inversion silicon controlled rectifier SCR4, and the SCR1 and the SCR3 are connected with the SCR2 and the SCR4. An end of the inversion electrothermal capacitor C2 is connected with a node of the inversion silicon controlled rectifiers SCR1 and the inversion silicon controlled rectifiers SCR3. The other end of the inversion electrothermal capacitor C2 is connected in series with the induction coil, and then is connected with a node of the inversion silicon controlled rectifier SCR2 and the inversion silicon controlled rectifier SCR4. The induction heating power supply can output smooth and continuous power, and prevents an inductor from outputting abrupt changing power.
Description
Technical field
The utility model relates to a kind of induction heating power, is specifically related to a kind of induction heating power that has core galvanized pot.
Background technology
Traditional induction heating power system that has core galvanized pot to adopt is power frequency RCL circuit.In order to meet the circuit parameter of power-supply system, in circuit, just need to configure balanced capacitor and interphase reactor, so that inductance current and capacity current in power-supply system are quantitatively equated, in phase place, differ 180 °, thereby improve the power factor COS ￠ of circuit.In the time of circuit design, should calculate compensation resonant capacitance value, calculated equilibrium capacitance and balance reactance electric weight again.Simultaneously must Check Phase Sequence before power supply input, meet and be input as positive phase sequence and access and incorrectly will cause the serious imbalance of power supply.In equipment running process, because the variation of reactance is larger, also need to regulate in time the capacity of building-out capacitor, to reach the requirement of power factor COS ￠=0.955～1 of circuit, and by detecting three-phase current
numerical value carry out the balance that circuit adjustment keeps electrical network, adjustment operation process complexity.
The another kind of power frequency SCOTT feed circuit that adopts, although this circuit does not have RCL circuit complexity, circuit is composed in parallel by compensation condenser and induction coil, the compensation work of having followed the tracks of power factor COS ￠ by circuit self electrical quantity.But this power supply input requirements is single phase poaer supply, need in actual use two inductor synchronous operations to meet the balance of input side electric current, once occur asynchronous, such as: both sides power is not identical, need to stop a side inductor when special circumstances meets the situation that the situations such as equipment operation all there will be power supply input side current imbalance, and this network system institute is unallowed exactly.
Above two kinds of power supplys are conventional at present power supplys, except above listed factor, mainly also there is a defect in it, exactly in the time that the material of zinc pot is non-uniform dielectric GL or pack alloy AlSi, identical inductor is in the time need to meeting the technological requirement of production line, inductor need to be exported very large power, but:
A) calculate formula P=UI COS ￠ according to power output and learn, conventional power frequency supply is in order to meet the requirement of power output P, and the input voltage U that must improve inductor promotes power output P;
B) when power frequency supply voltage U is provided, be that magnetic unshakable in one's determination is close by induced potential computing formula u=4.44 × f × w × B × At(B, the magnetic of power transformer iron core is close conventionally between 1.7-1.75; At is net sectional area unshakable in one's determination; W is the number of turn, f is input power frequency) learn, as input power frequency f remains unchanged, the rising of voltage u, the close B of magnetic unshakable in one's determination will synchronously improve, once the close increase of magnetic reaches critical value, inductor coil will operate in unsafe interval, once unfavorable factor appears in the external world, inductor coil is easy to damage because of overheated, thereby produces security incident;
C) because power output is large, traditional power frequency supply system long-play switches between high power heating and low-power insulation, in handoff procedure, the channel inwall of inductor is often subject to the electrodynamic impact that suddenlys change, the damage of the heat proof material to zinc pot is very large, thereby has shortened the useful life of inductor;
D) traditional power frequency supply, along with the variation of production technology, usually needs manually to go power switched input gear, to meet actual power stage.Power stage control mode is for there being utmost point control mode, and is to belong to open loop control, and accuracy of temperature control is low, only in 0.3 grade～0.5 grade, requires high product just cannot meet production requirement to temperature accuracy.
Summary of the invention
The purpose of this utility model is to overcome the defect of prior art, a kind of induction heating power that has core galvanized pot is provided, it is close that it can not only can reduce the magnetic of iron core in the powerful while of output, and can export a level and smooth continuous power, avoids the power of inductor output mutation.
The purpose of this utility model is achieved in that a kind of induction heating power that has core galvanized pot, comprise major loop and main control unit, described major loop comprises rectifier, filter, inverter and induction coil, described rectifier forms three-phase bridge rectification circuit by six rectification thyristor ZD1～ZD6, described filter is made up of the filter inductance L1 connecting and filter capacitor C1, wherein
Described inverter forms full-bridge series resonance circuit by four inversion controllable silicon SCR 1～SCR4 and a resonant capacitance C2, described four inversion controllable silicon SCR 1～SCR4 connect with inversion controllable silicon SCR 3 with inversion controllable silicon SCR 1, inversion controllable silicon SCR 2 mode more in parallel of connecting with inversion controllable silicon SCR 4 is in parallel with the filter capacitor C1 of described filter, an end of described resonant capacitance C2 is connected on the connected node A of inversion controllable silicon SCR 1 and inversion controllable silicon SCR 3, the other end of resonant capacitance C2 is connected on after connecting with described induction coil on the connected node B of inversion controllable silicon SCR 2 and inversion controllable silicon SCR 4,
Described inverter also comprises protective circuit, this protective circuit by four correspondingly with inversion sustained diode 2, D3, D4, D5 and four choking-winding L2, L3, L4, L5 that connect with four inversion controllable silicon SCR 1～SCR4 correspondingly of four inversion controllable silicon SCR 1～SCR4 parallel connection;
Described in being enclosed within, described induction coil has on the body of heater of core galvanized pot;
The output of described main control unit is connected with the control utmost point signal of described four inversion controllable silicon SCR 1～SCR4 respectively, the input of described main control unit be located at described in have the temperature sensor signal in the body of heater of core galvanized pot to be connected, the input of described main control unit is also connected with the current/voltage sensor signal being connected on described induction coil.
The above-mentioned induction heating power that has core galvanized pot, wherein, described major loop also comprises a rectification sustained diode 1 that is connected in parallel on the output of rectifier.
The induction heating power that has core galvanized pot of the present utility model, has following advantage:
1. the power factor of power supply meets GB requirement COS ￠ >0.92;
2. power is exported at 5%～100% level and smooth continuous wave output, avoids the power of inductor output mutation;
3. can be according to the output of output current control supply frequency to prevent iron core magnetic saturation;
4. accuracy of temperature control can be increased to 0.1 grade;
5. can improve the useful life that has core galvanized pot.
Brief description of the drawings
Fig. 1 is the schematic diagram of the induction heating power that has core galvanized pot of the present utility model;
Fig. 2 is the circuit diagram of the major loop of the induction heating power that has core galvanized pot of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Refer to Fig. 1 and Fig. 2, a kind of induction heating power that has core galvanized pot of the present utility model, comprises major loop and main control unit 20.
Major loop comprises rectifier 1, rectification sustained diode, filter 2, inverter 3 and induction coil 4, wherein:
Rectifier 1 is made up of six rectification thyristor ZD1～ZD6;
Rectification sustained diode 1 is connected in parallel on the output of rectifier 2, and forms loop with rectifier 2, make high electromotive force that rectifier 2 produces in loop to continue current system consumption, thereby play the not impaired effect of element in protection rectifier 2 circuit;
Filter 2 is made up of the filter inductance L1 connecting and filter capacitor C1;
Rectifier 3 is three-phase bridge rectification circuit, and the three-phase alternating current of being inputted by electrical network is exported a galvanic current source after through rectifier 3 rectifications and by filter 2 filtering;
Inverter 3 forms full-bridge series resonance circuit by four inversion controllable silicon SCR 1～SCR4 and a resonant capacitance C2; It is in parallel with the filter capacitor C1 of filter after four inversion controllable silicon SCR 1～SCR4 connect with inversion controllable silicon SCR 3 with inversion controllable silicon SCR 1, inversion controllable silicon SCR 2 is in parallel with the filter capacitor C1 of filter after connecting with inversion controllable silicon SCR 4, it is upper with the connected node A of inversion controllable silicon SCR 3 that an end of resonant capacitance C2 is connected on inversion controllable silicon SCR 1, and the other end of resonant capacitance C2 is connected on after connecting with induction coil 4 on the connected node B of inversion controllable silicon SCR 2 and inversion controllable silicon SCR 4;
Inverter 3 also comprises protective circuit, this protective circuit by four correspondingly with inversion sustained diode 2, D3, D4, D5 and four choking-winding L2, L3, L4, L5 that connect with four inversion controllable silicon SCR 1～SCR4 correspondingly of four inversion controllable silicon SCR 1～SCR4 parallel connection; Because inversion fly-wheel diode inversion controllable silicon is in parallel and form loop with inversion controllable silicon, make high electromotive force that inverter 3 produces in loop to continue current system consumption, for the change of current of inverter 3 provides a bypass channel, greatly reduce the damage probability of the power control member of inverter 3; Utilize in addition choking-winding reactance and frequency proportional, can control high-frequency ac current, allow low frequency and direct current pass through.
Induction coil 4 is enclosed within on the body of heater of core galvanized pot;
The output of main control unit 20 is connected with the control utmost point signal of four inversion controllable silicon SCR 1～SCR4 respectively, the input of this main control unit 20 is connected with the temperature sensor signal being located in the body of heater of core galvanized pot, and the input of main control unit 20 is also connected with the electric current, the voltage sensor signals that are connected on induction coil 4.
The operation principle of the induction heating power that has core galvanized pot of the present utility model is:
A. rectifier 1 adopts silicon controlled rectifier, and three phase rectifier thyristor operating angle is 0 ° of triggering, and direct current moves all the time under full voltage state, so the power factor (PF) of circuit can be more than 0.95 under any power situation; In addition, the filter that adopts reactor and electric capacity to form after rectification carries out energy storage, and when equipment being stopped and starting, consumed energy is few;
B. main control unit 20 gathers the temperature feedback signal of the metallic solution in zinc pot by temperature sensor, and after this signal and setting signal are calculated through the start pulse signal of proportional integral derivative controller (PID) regulation output one frequency, the SCR1/SCR4 of this pulse signal control inverter 3 and SCR2/SCR3(are in the a:t0 moment, pulse signal triggers inversion controllable silicon SCR 1 and inversion controllable silicon SCR 4, the sense of current is choking-winding L2 → inversion controllable silicon SCR 1 → resonant capacitance C2 → induction coil 4 → inversion controllable silicon SCR 4 → choking-winding L5, power supply passes through induction coil 4 to resonant capacitance C2 positive charge, until when positive charge electric current be zero and resonant capacitor C2 on voltage be greater than supply voltage, now resonant capacitor C2 discharges by inversion sustained diode 2 → choking-winding L2 → filter inductance L1 → power supply → choking-winding L5 → inversion sustained diode 5 → induction coil 4, inversion controllable silicon SCR 1 and inversion controllable silicon SCR 4 are closed automatically, in the b:t1 moment, pulse signal triggers inversion controllable silicon SCR 2 and inversion controllable silicon SCR 3, the sense of current is choking-winding L3 → inversion controllable silicon SCR 2 → induction coil 4 → resonant capacitance C2 → inversion controllable silicon SCR 3 → L4, power supply passes through induction coil 4 to resonant capacitance C2 reverse charging, until when reverse charging electric current be zero and resonant capacitance C2 on voltage be greater than supply voltage, now resonant capacitance C2 discharges by inversion sustained diode 3 → choking-winding L3 → filter inductance L1 → power supply → choking-winding L4 → inversion sustained diode 4 → induction coil 4, inversion controllable silicon SCR 2 and inversion controllable silicon SCR 4 are closed automatically.The inversion controllable silicon SCR 1/SCR4 that alternately triggers inverter 3 so going round and beginning again and inversion controllable silicon SCR 2/SCR3); Inverter 3 is exported an alternating current to induction coil 4, makes the temperature control system of whole equipment form closed loop control mode, and accuracy of temperature control improves greatly, even if accuracy of temperature control is increased to 0.1 grade by traditional 0.3 grade;
C. main control unit 20 is by the voltage and current signal of electric current, voltage sensor senses induction coil 4, and in the time that voltage reaches design load, main control unit 20 calculates in time to be followed the tracks of and deboost output; In the time that electric current reaches design load, main control unit 20 calculates in time to be followed the tracks of and Limited Current output;
D. because iron core (body of heater) sectional area that has core galvanized pot is steady state value, be that magnetic unshakable in one's determination is close by induced potential computing formula u=4.44 × f × w × B × At(B, the magnetic of power transformer iron core is close conventionally between 1.7-1.75; At is net sectional area unshakable in one's determination; W is the number of turn, and f is input power frequency) to learn, overtension will damage equipment; In the time that equipment need to improve output voltage and meets power requirement, it is close that the output frequency that main control unit 20 can be adjusted in time power supply in output voltage reduces the magnetic of induction coil 4, guarantees the safe operation of equipment;
E. because inverter 3 is in series resonance state, changing inverter 3 trigger rates is adjustable output power, makes power output smooth adjustment output between 5%～100%, without artificial selection power gear;
F. because the voltage of induction coil 4 is level and smooth input, avoid the impact of the heat proof material of traditional electric power owing to there being utmost point input voltage to cause sudden change to zinc pot, greatly reduce the fault that zinc appears leaking in zinc pot, and alleviated the damage to heat proof material, thereby greatly improve the useful life of inductor.
Above embodiment is only for illustration of the utility model, but not to restriction of the present utility model, person skilled in the relevant technique, in the situation that not departing from spirit and scope of the present utility model, can also make various conversion or modification, therefore all technical schemes that are equal to also should belong to category of the present utility model, should be limited by each claim.
Claims (2)
1. one kind has the induction heating power of core galvanized pot, comprise major loop and main control unit, described major loop comprises rectifier, filter, inverter and induction coil, described rectifier forms three-phase bridge rectification circuit by six rectification thyristor ZD1～ZD6, described filter is made up of the filter inductance L1 connecting and filter capacitor C1, it is characterized in that
Described inverter forms full-bridge series resonance circuit by four inversion controllable silicon SCR 1～SCR4 and a resonant capacitance C2, described four inversion controllable silicon SCR 1～SCR4 connect with inversion controllable silicon SCR 3 with inversion controllable silicon SCR 1, inversion controllable silicon SCR 2 mode more in parallel of connecting with inversion controllable silicon SCR 4 is in parallel with the filter capacitor C1 of described filter, an end of described resonant capacitance C2 is connected on the connected node A of inversion controllable silicon SCR 1 and inversion controllable silicon SCR 3, the other end of resonant capacitance C2 is connected on after connecting with described induction coil on the connected node B of inversion controllable silicon SCR 2 and inversion controllable silicon SCR 4,
Described inverter also comprises protective circuit, this protective circuit by four correspondingly with inversion sustained diode 2, D3, D4, D5 and four choking-winding L2, L3, L4, L5 that connect with four inversion controllable silicon SCR 1～SCR4 correspondingly of four inversion controllable silicon SCR 1～SCR4 parallel connection;
Described in being enclosed within, described induction coil has on the body of heater of core galvanized pot;
The output of described main control unit is connected with the control utmost point signal of described four inversion controllable silicon SCR 1～SCR4 respectively, the input of described main control unit be located at described in have the temperature sensor signal in the body of heater of core galvanized pot to be connected, the input of described main control unit is also connected with the current/voltage sensor signal being connected on described induction coil.
2. the induction heating power that has core galvanized pot according to claim 1, is characterized in that, described major loop also comprises a rectification sustained diode 1 that is connected in parallel on the output of rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320888705.2U CN203734864U (en) | 2013-12-31 | 2013-12-31 | Induction heating power supply of cored galvanized pot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320888705.2U CN203734864U (en) | 2013-12-31 | 2013-12-31 | Induction heating power supply of cored galvanized pot |
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| Publication Number | Publication Date |
|---|---|
| CN203734864U true CN203734864U (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320888705.2U Expired - Lifetime CN203734864U (en) | 2013-12-31 | 2013-12-31 | Induction heating power supply of cored galvanized pot |
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| CN (1) | CN203734864U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836453A (en) * | 2015-05-14 | 2015-08-12 | 杭州科远电炉有限公司 | Novel thyristor series half-bridge inverter resonant frequency inverter device |
| CN108476561A (en) * | 2015-12-24 | 2018-08-31 | 高周波热錬株式会社 | Induction heating power equipment |
-
2013
- 2013-12-31 CN CN201320888705.2U patent/CN203734864U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836453A (en) * | 2015-05-14 | 2015-08-12 | 杭州科远电炉有限公司 | Novel thyristor series half-bridge inverter resonant frequency inverter device |
| CN108476561A (en) * | 2015-12-24 | 2018-08-31 | 高周波热錬株式会社 | Induction heating power equipment |
| CN108476561B (en) * | 2015-12-24 | 2021-10-12 | 高周波热錬株式会社 | Induction heating power supply apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Mike Nellen Inventor after: Zhang Jian Inventor after: Yu Xiongwei Inventor before: Chen Ying Inventor before: Yu Xiongwei |
|
| COR | Change of bibliographic data | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140723 |
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| CX01 | Expiry of patent term |