CN104302027A - Intermediate frequency-superaudio frequency-high frequency induction heating power source of IGBT full bridge inversion - Google Patents
Intermediate frequency-superaudio frequency-high frequency induction heating power source of IGBT full bridge inversion Download PDFInfo
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- CN104302027A CN104302027A CN201410452171.8A CN201410452171A CN104302027A CN 104302027 A CN104302027 A CN 104302027A CN 201410452171 A CN201410452171 A CN 201410452171A CN 104302027 A CN104302027 A CN 104302027A
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Abstract
The invention discloses an intermediate frequency-superaudio frequency-high frequency induction heating power source of IGBT full bridge inversion. The intermediate frequency-superaudio frequency-high frequency induction heating power source comprises a three-phase rectifier bridge, an IGBT inversion driver, an IGBT full-bridge inverter, a main board PLC, a touch screen and a switching power source. The intermediate frequency-superaudio frequency-high frequency induction heating power source has the technical advantages that constant power/constant current controlling, temperature detecting, frequency tracking, zero-power starting and voltage and current closed-loop controlling can be achieved; overvoltage, output overcurrent, alternating current undervoltage, gap, input overcurrent, transformer overheat and other faults can be monitored in real time, fast response is achieved, and real-time displaying is achieved; touch screen displaying and controlling are achieved, and a human-computer interface is friendly; a voltage adjusting resonance output mode, a constant-frequency mode and a constant-voltage frequency adjusting mode can be selected; wide-range detection can be carried out for different loads; 0.2 Khz-200 Khz induction heating is achieved, and the working frequency can be manually selected for the constant-frequency application; the resonant frequency of a current tank circuit can be automatically tracked for a resonance 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 full-bridge inverting intermediate frequency-superaudio-high-frequency induction heating power.
Technical scheme of the present invention is, a kind of IGBT full-bridge inverting intermediate frequency-superaudio-high-frequency induction heating power, comprising: three-phase commutation bridge, and IGBT inversion drives, IGBT full-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 full-bridge inverter, pre-charge resistance R1 is connected between three-phase commutation bridge and IGBT full-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, series connection and resistance R3, R4, electric capacity C2, C3 are in parallel with series resistance R3, R4, connect between electric capacity C2, C3 and between resistance R3, R4; IGBT full-bridge inverter meets induction coil L2 through electric capacity C4; 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 full-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 GBT full-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; 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: C4:1.2-1000-23s; FF300A-12KS4; Mainboard PLC.
Embodiment
As shown in Figure 1, a kind of IGBT full-bridge inverting intermediate frequency-superaudio-high-frequency induction heating power, comprising: three-phase commutation bridge, and IGBT inversion drives, IGBT full-bridge inverter, mainboard PLC, 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 full-bridge inverter, pre-charge resistance R1 is connected between three-phase commutation bridge and IGBT full-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, series connection and resistance R3, R4, electric capacity C2, C3 are in parallel with series resistance R3, R4, connect between electric capacity C2, C3 and between resistance R3, R4; IGBT full-bridge inverter meets induction coil L2 through electric capacity C4; 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 full-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 GBT full-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, and IC2 is to IGBT half-bridge inverter, a high-frequency driving signal, the voltage and current signal of output collection feeds back, and compares with parameter preset, and normally then drive singal is strengthened, otherwise turn off, the frequency of oscillation of power supply is drawn close to resonance frequency, and with the adjustment of digital potentiometer, power continues to increase, to reaching resonance frequency to operating frequency, now power supply Maximum Power Output! Period (hydraulic pressure, water temperature, input phase failure, load overvoltage or overcurrent, commutation failure an etc.) arbitrary abnormal parameters! Export IGBT immediately to close! Prevent failure propagation!
Claims (1)
1. IGBT full-bridge inverting intermediate frequency-superaudio-high-frequency induction heating power, comprising: three-phase commutation bridge, and IGBT inversion drives, IGBT full-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 full-bridge inverter, pre-charge resistance R1 is connected between three-phase commutation bridge and IGBT full-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, series connection and resistance R3, R4, electric capacity C2, C3 are in parallel with series resistance R3, R4, connect between electric capacity C2, C3 and between resistance R3, R4; IGBT full-bridge inverter meets induction coil L2 through electric capacity C4; 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 full-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 GBT full-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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| Application Number | Priority Date | Filing Date | Title |
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| CN201410452171.8A CN104302027A (en) | 2014-09-05 | 2014-09-05 | Intermediate frequency-superaudio frequency-high frequency induction heating power source of IGBT full bridge inversion |
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| CN201410452171.8A CN104302027A (en) | 2014-09-05 | 2014-09-05 | Intermediate frequency-superaudio frequency-high frequency induction heating power source of IGBT full bridge inversion |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107717199A (en) * | 2017-10-31 | 2018-02-23 | 天津七所高科技有限公司 | A kind of medium frequency inverter electric resistance welding inverter constant current control method |
| CN111918434A (en) * | 2020-09-01 | 2020-11-10 | 西安威特电力电子设备研究所 | Induction heating and melting system with automatic impedance adjustment function and adjustment method |
| CN113316278A (en) * | 2021-05-24 | 2021-08-27 | 核工业理化工程研究院 | Power-adjustable induction heating power supply system for heating graphite reaction kettle |
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| JP2003229239A (en) * | 2002-02-04 | 2003-08-15 | Canon Inc | Induction heater, and heating and fixing device |
| CN1842229A (en) * | 2005-03-31 | 2006-10-04 | 张希民 | Superaudio FM AM half bridge series resonance output electromagnetic induction heating power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107717199A (en) * | 2017-10-31 | 2018-02-23 | 天津七所高科技有限公司 | A kind of medium frequency inverter electric resistance welding inverter constant current control method |
| CN111918434A (en) * | 2020-09-01 | 2020-11-10 | 西安威特电力电子设备研究所 | Induction heating and melting system with automatic impedance adjustment function and adjustment method |
| CN113316278A (en) * | 2021-05-24 | 2021-08-27 | 核工业理化工程研究院 | Power-adjustable induction heating power supply system for heating graphite reaction kettle |
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Application publication date: 20150121 |