IGBT (Insulated Gate Bipolar Translator) half-bridge inverter medium-frequency - ultrasonic-frequency - high-frequency induction heating power supply
A high-frequency induction heating, half-bridge inverter technology, applied in induction heating, induction current source, induction heating control and other directions, can solve the problem of limited use range, achieve high power factor, high efficiency system, friendly man-machine interface Effect
Active Publication Date: 2015-02-11
湘潭市南冶中频高新技术开发有限公司
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But it can only work below 10000Hz, which limits its range of use
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[0010] Such as figure 1 As shown, an IGBT half-bridge inverter intermediate frequency-ultra-audio frequency-high frequency induction heating power supply includes: a three-phase rectifier bridge, an IGBT inverter drive, an IGBT half-bridge inverter, and the main board PLC is completed by two ICs ( IC1: EPM240T100C5N and IC2: TMS320LF2407ApGEA), touch screen, switching power supply; three-phase power supply A, B, C connected to the A, B, C terminals of the three-phase rectifier bridge, the three-phase rectifier bridge connected to the IGBT half-bridge inverter, in the three-phase rectifier bridge and the IGBT half-bridge inverter are connected with a pre-charging resistor R1, a charging 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. The resistance-capacitance The absorption circuit includes capacitors C2 and C3 in series, resistors R3 and R4 in series, ...
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The invention discloses an IGBT (Insulated Gate Bipolar Translator) half-bridge inverter medium-frequency - ultrasonic-frequency - high-frequency induction heating power supply. The IGBT half-bridge inverter medium-frequency - ultrasonic-frequency - high-frequency induction heating power supply comprises a three-phase rectifier bridge, an IGBT inverter driver, an IGBT half-bridge inverter, a mainboard PLC (Programmable Logic Controller), a touch screen and a switching power supply. The IGBT half-bridge inverter medium-frequency - ultrasonic-frequency - high-frequency induction heating power supply has the technical effects that 1) constant-power / constant-current control, temperature detection, frequency tracking, zero power start and voltage and current closed loop control can be realized; a fault detection and protection circuit can realize real-time monitoring of, quick response to and real-time display of faults such as overheating, overvoltage, output overcurrent, alternating-current undervoltage, open phase and input overcurrent; 2) a man-machine interface is friendly; 3) the voltage regulation resonant output mode is optional; 4) aiming at different loads, wide-range detection can be realized to achieve the optimum working state; 5) induction heating can be realized within 0.2Khz-200Khz, and the working frequency can be manually selected for fixed-frequency application; 6) for a resonant power supply, the resonant frequency of the current tank circuit can be automatically tracked.
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...
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Inventor 谭见
Owner 湘潭市南冶中频高新技术开发有限公司