CN104349521B - IGBT semi-bridge inversion intermediate frequency-superaudio-high-frequency induction heating power - Google Patents
IGBT semi-bridge inversion intermediate frequency-superaudio-high-frequency induction heating power Download PDFInfo
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- CN104349521B CN104349521B CN201410452223.1A CN201410452223A CN104349521B CN 104349521 B CN104349521 B CN 104349521B CN 201410452223 A CN201410452223 A CN 201410452223A CN 104349521 B CN104349521 B CN 104349521B
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Abstract
The invention discloses a kind of IGBT semi-bridge inversion intermediate frequency-superaudio-high-frequency induction heating power, comprising: three-phase commutation bridge, IGBT inversion drives, IGBT half-bridge inverter, mainboard PLC, touch-screen, Switching Power Supply.Technique effect of the present invention, 1, permanent merit/current constant control can be realized, temperature detection, frequency-tracking, zero energy starts, voltage, closed-loop current control; Fault detect protective circuit to overheated, overvoltage, output overcurrent, AC undervoltage, lacuna, the real-time monitoring of faults such as input overcurrent etc., fast reaction, shows in good time; 2, man-machine interface is friendly; 3, optional pressure regulation resonance output mode; 4, for different loads, can detect by wide region, reach optimum Working; 5, at 0.2Khz-200Khz induction heating, manually operating frequency can be selected for determining frequency application; 6, for resonant power, can to the automatic resonance frequency tracker of the current tank circuit.
Description
Technical field
The present invention relates to a kind of induction heating power
Background technology
The power electronic device of traditional induction heating equipment application is electron tube and high speed thyristor.Tube voltage is high, poor stability, and radiation is strong, and efficiency is low, and arrived the edge eliminated, but its frequency is high, power is large, so commercially still have one seat.High speed thyristor is the main force of at present application, it is withstand voltage height, and electric current is large, and anti-overcurrent, overvoltage capabilities are stronger.But it can only be operated in below 10000Hz, this makes its scope of application be restricted.IGBT is a kind of hybrid power device, and it integrates the advantage of bipolar power transistor and power MOSFET, has voltage mode control, input impedance is large, driving power is little, and control circuit is simple, and switching loss is little, break-make speed is fast, and operating frequency is higher, and element volume is large.It not only reaches the inaccessiable frequency (more than 60kHz) of thyristor, and progressively replaces high speed thyristor.The induction heating extensive use IGBT of external 1kHz ~ 80kHz, this is the developing direction of induction heating power.
Summary of the invention
The object of this invention is to provide a kind of IGBT semi-bridge inversion intermediate frequency-superaudio-high-frequency induction heating power.
Technical scheme of the present invention is, a kind of IGBT semi-bridge inversion intermediate frequency-superaudio-high-frequency induction heating power, comprising: three-phase commutation bridge, and IGBT inversion drives, IGBT half-bridge inverter, mainboard PLC, touch-screen, Switching Power Supply; It is characterized in that: three phase mains A, B, C connect three-phase commutation bridge A, B, C end, three phase rectifier bridge joint IGBT half-bridge inverter, pre-charge resistance R1 is connected between three-phase commutation bridge and IGBT half-bridge inverter, charge relay coil J, filter circuit and resistance-capacitance absorption loop, described filter circuit is made up of the filter capacitor C1 of parallel connection and discharge resistance R2, described resistance-capacitance absorption loop comprises electric capacity C2, C3 of series connection, resistance R3, R4 of series connection, electric capacity C2, C3 are in parallel with series resistance R3, R4, connect between electric capacity C2, C3 and between resistance R3, R4; IGBT half-bridge inverter meets induction coil L2; The Kc1/Kc2 pin of Kc1, Kc2 termination mainboard PLC of charge relay coil J, filter circuit connects the input voltage measurement pin of mainboard PLC, IGBT inversion drives the inversion meeting IGBT half-bridge inverter and mainboard PLC respectively to drive pin, touch-screen connects the Rs485 pin of mainboard PLC, Switching Power Supply connects the DC24V pin of mainboard PLC, three phase mains is connected to input current sampling coil L1, current sample coil L1 connects the input electric cur-rent measure pin of mainboard PLC, and three phase mains A, B, C connect A, B, C three-phase detection pin of mainboard PLC; Be connected to output current sampling coil L3 at IGBT half-bridge inverter and induction coil L2 link, current sample coil L3 connects the output electric current measure pin of mainboard PLC; Be connected to startup, stopping at the signal input pin of mainboard PLC, detect button.
The present invention has following technique effect, and 1, can High Power Factor be realized, high efficiency systems, permanent merit/current constant control, temperature detection, frequency-tracking, zero energy starts, voltage, closed-loop current control; Fault detect protective circuit is to lack of water, overheated, overvoltage, output overcurrent, AC undervoltage, lacuna, input overcurrent, and transformer is overheated, and etc. the real-time monitoring of fault, fast reaction, shows in good time; 2, adopt graphic control panel display and control, man-machine interface is friendly; 3, mode of operation: optional pressure regulation resonance output mode, fixed pattern frequently, level pressure hopping pattern; 4, export the tank circuit to detect: for different loads, can detect by wide region, reach optimum Working; 5, frequency of utilization scope: 0.2Khz-200Khz induction heating, manually can select operating frequency for determining frequency application; 6, automatic frequency tracking: for resonant power, can to the automatic resonance frequency tracker of the current tank circuit; 7, zero energy starts: start and the output of standby no-voltage, do not need the support of dummy load.
Accompanying drawing explanation
Fig. 1 is invention circuit theory diagrams.
In figure, L1:200/1; L2, L3 are oscillation transformer 1000KVA no-load voltage ratio 12 to 2 or 1; Three-phase commutation bridge: MDC-400A-1600V; J:CJ20-150A; R1:500n-100W; R2:15K-100W; R3=R4:3W-100W; C1:800V-470uf*30; C2=C3:1uf; IGBT half-bridge inverter: FF300A-12KS4; Mainboard PLC.
Fig. 2 is detailed circuit schematic diagram of the present invention.
Embodiment
As shown in Figure 1 and Figure 2, a kind of IGBT semi-bridge inversion intermediate frequency-superaudio-high-frequency induction heating power, comprise: three-phase commutation bridge, IGBT inversion drives, IGBT half-bridge inverter, IGBT half-bridge inverter mainboard PLC completes correlation function (IC1:EPM240T100C5N and IC2:TMS320LF2407ApGEA) by two pieces of IC, touch-screen, Switching Power Supply; Three phase mains A, B, C connect three-phase commutation bridge A, B, C end, three phase rectifier bridge joint IGBT half-bridge inverter, pre-charge resistance R1 is connected between three-phase commutation bridge and IGBT half-bridge inverter, charge relay coil J, filter circuit and resistance-capacitance absorption loop, described filter circuit is made up of the filter capacitor C1 of parallel connection and discharge resistance R2, described resistance-capacitance absorption loop comprises electric capacity C2, C3 of series connection, resistance R3, R4 of series connection, electric capacity C2, C3 are in parallel with series resistance R3, R4, connect between electric capacity C2, C3 and between resistance R3, R4; IGBT half-bridge inverter meets induction coil L2; The Kc1/Kc2 pin of Kc1, Kc2 termination mainboard PLC of charge relay coil J, filter circuit connects the input voltage measurement pin of mainboard PLC, IGBT inversion drives the inversion meeting IGBT half-bridge inverter and mainboard PLC respectively to drive pin, touch-screen connects the Rs485 pin of mainboard PLC, Switching Power Supply connects the DC24V pin of mainboard PLC, three phase mains is connected to input current sampling coil L1, current sample coil L1 connects the input electric cur-rent measure pin of mainboard PLC, and three phase mains A, B, C connect A, B, C three-phase detection pin of mainboard PLC; Be connected to output current sampling coil L3 at IGBT half-bridge inverter and induction coil L2 link, current sample coil L3 connects the output electric current measure pin of mainboard PLC; Be connected to startup, stopping at the signal input pin of mainboard PLC, detect button.
Operation principle of the present invention: after load has connected, the startup connect in start button or main screen is good for, IC2 is to IGBT half-bridge inverter, a high-frequency driving signal, the voltage and current signal of output collection feeds back, compare with parameter preset, normal then drive singal is strengthened, otherwise turn off, the frequency of oscillation of power supply is drawn close to resonance frequency, with the adjustment of digital potentiometer, power continues to increase, to reaching resonance frequency to operating frequency, now power supply Maximum Power Output, if hydraulic pressure, water temperature, input phase failure, load overvoltage or overcurrent, arbitrary abnormal parameters such as commutation failure, IGBT half-bridge inverter is closed immediately, prevent fault from occurring.
Claims (1)
1. IGBT semi-bridge inversion intermediate frequency-superaudio-high-frequency induction heating power, comprising: three-phase commutation bridge, and IGBT inversion drives, IGBT half-bridge inverter, mainboard PLC, touch-screen, Switching Power Supply; It is characterized in that: three phase mains A, B, C connect three-phase commutation bridge A, B, C end, three phase rectifier bridge joint IGBT half-bridge inverter, pre-charge resistance R1 is connected between three-phase commutation bridge and IGBT half-bridge inverter, charge relay coil J, filter circuit and resistance-capacitance absorption loop, described filter circuit is made up of the filter capacitor C1 of parallel connection and discharge resistance R2, described resistance-capacitance absorption loop comprises electric capacity C2, C3 of series connection, resistance R3, R4 of series connection, electric capacity C2, C3 are in parallel with series resistance R3, R4, connect between electric capacity C2, C3 and between resistance R3, R4; IGBT half-bridge inverter meets induction coil L2; The Kc1/Kc2 pin of Kc1, Kc2 termination mainboard PLC of charge relay coil J, filter circuit connects the input voltage measurement pin of mainboard PLC, IGBT inversion drives the inversion meeting IGBT half-bridge inverter and mainboard PLC respectively to drive pin, touch-screen connects the Rs485 pin of mainboard PLC, Switching Power Supply connects the DC24V pin of mainboard PLC, three phase mains is connected to input current sampling coil L1, current sample coil L1 connects the input electric cur-rent measure pin of mainboard PLC, and three phase mains A, B, C connect A, B, C three-phase detection pin of mainboard PLC; Be connected to output current sampling coil L3 at IGBT half-bridge inverter and induction coil L2 link, current sample coil L3 connects the output electric current measure pin of mainboard PLC; Be connected to startup, stopping at the signal input pin of mainboard PLC, detect button.
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| CN105958840A (en) * | 2016-06-22 | 2016-09-21 | 江苏盎华光伏工程技术研究中心有限公司 | Electrophoresis power supply equipment |
| CN109302082A (en) * | 2018-09-28 | 2019-02-01 | 奥克斯空调股份有限公司 | The frequency-variable controller and air conditioner of three phase mains |
| CN113251395B (en) * | 2021-01-28 | 2023-06-16 | 启研(沈阳)技术中心有限公司 | Steam generator control device based on electromagnetic induction heating technology |
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|---|---|---|---|---|
| WO2009117929A1 (en) * | 2008-03-24 | 2009-10-01 | Yu Zhengguo | Induction heating power supply circuit |
| CN203151780U (en) * | 2013-03-16 | 2013-08-21 | 无锡电炉有限责任公司 | IGBT (insulated gate bipolar transistor) induction heating power supply |
| CN103687116A (en) * | 2013-10-23 | 2014-03-26 | 北京久顺科技有限公司 | Digital FM (Frequency Modulation) PLL (Phase-locked Loop) full-bridge serial resonance electromagnetic induction heating power supply |
| CN204119562U (en) * | 2014-09-05 | 2015-01-21 | 湘潭市南冶中频高新技术开发有限公司 | IGBT semi-bridge inversion intermediate frequency-superaudio-high-frequency induction heating power |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000208240A (en) * | 1999-01-19 | 2000-07-28 | Mitsubishi Heavy Ind Ltd | High frequency power supply unit and high frequency induction heating unit |
| KR101093539B1 (en) * | 2009-12-04 | 2011-12-14 | 주식회사 리홈 | Induction heating apparatus |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009117929A1 (en) * | 2008-03-24 | 2009-10-01 | Yu Zhengguo | Induction heating power supply circuit |
| CN203151780U (en) * | 2013-03-16 | 2013-08-21 | 无锡电炉有限责任公司 | IGBT (insulated gate bipolar transistor) induction heating power supply |
| CN103687116A (en) * | 2013-10-23 | 2014-03-26 | 北京久顺科技有限公司 | Digital FM (Frequency Modulation) PLL (Phase-locked Loop) full-bridge serial resonance electromagnetic induction heating power supply |
| CN204119562U (en) * | 2014-09-05 | 2015-01-21 | 湘潭市南冶中频高新技术开发有限公司 | IGBT semi-bridge inversion intermediate frequency-superaudio-high-frequency induction heating power |
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