Intermediate frequency-superaudio frequency-high frequency induction heating power source of IGBT full bridge inversion

A technology of high-frequency induction heating and full-bridge inverter, which is applied in the direction of induction heating, induction current source, induction heating control, etc., can solve problems such as limited application range, achieve high power factor, high-efficiency system, and friendly man-machine interface Effect

Inactive Publication Date: 2015-01-21
湘潭市南冶中频高新技术开发有限公司
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  • Claims
  • Application Information

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Problems solved by technology

But it can only work below 10000Hz, which limits its range of use

Method used

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  • Intermediate frequency-superaudio frequency-high frequency induction heating power source of IGBT full bridge inversion

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Embodiment Construction

[0008] like figure 1 As shown, an IGBT full-bridge inverter intermediate frequency-ultra-audio frequency-high frequency induction heating power supply includes: three-phase rectifier bridge, IGBT inverter drive, IGBT full-bridge inverter, main board PLC, touch screen, switching power supply; three-phase Power supply A, B, C are connected to terminals A, B, and C of the three-phase rectifier bridge, and the three-phase rectifier bridge is connected to the IGBT full-bridge inverter. A pre-charging resistor R1 is connected between the three-phase rectifier bridge and the IGBT full-bridge inverter to charge Relay coil J, a filter circuit and a resistance-capacitance absorption circuit, the filter circuit is composed of a parallel filter capacitor C1 and a discharge resistor R2, and the resistance-capacity absorption circuit includes series capacitors C2, C3, series and resistors R3, R4 , capacitors C2, C3 are connected in parallel with series resistors R3, R4, capacitors C2, C3 ar...

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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 [0001] The invention relates to an induction heating power supply Background technique [0002] The traditional power electronic devices used in induction heating equipment are electron tubes and fast thyristors. The electron tube has high voltage, poor stability, strong radiation, and low efficiency. It has reached the edge of elimination, but it has a high frequency and high power, so it still has a place in the market. Fast thyristors are the main force in current applications. They have high withstand voltage, large current, and strong ability to resist overcurrent and overvoltage. But it can only work below 10000Hz, which limits its scope of use. IGBT is a composite power device, which integrates the advantages of bipolar power transistor and power MOSFET. The frequency is high and the component capacity is large. It not only reaches the frequency that the thyristor cannot reach (above 60kHz), but also gradually replaces the fast thyristor. 1kHz ~ 8...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B6/04H05B6/06
Inventor 谭见
Owner 湘潭市南冶中频高新技术开发有限公司
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