company news about The performance and features of the IGBT medium-frequency power cabinet

The performance and features of the IGBT medium-frequency power cabinet

The IGBT medium-frequency power cabinet is a medium-frequency power equipment with insulated gate bipolar transistor (IGBT) as the core switching device. It is widely used in industrial fields such as metal smelting, forging heating, heat treatment, and welding. Its performance and characteristics mainly lie in the following aspects:
Core performance
High efficiency and outstanding energy-saving performance
As a fully controlled power device, IGBT has significantly lower switching loss and conduction voltage drop compared to traditional thyristors. Combined with an optimized topology (such as series resonant and parallel resonant), the overall efficiency of the entire machine can reach over 90% (while traditional thyristor medium-frequency power supplies typically range from 80% to 85%), significantly reducing energy consumption.
Wide frequency adjustment range, with strong adaptability
The frequency adjustment range is wide (typically 1kHz - 20kHz, and some models can reach 50kHz), and the adjustment accuracy is high (±0.1%). It can precisely match the load characteristics according to different process requirements (such as melting, heat treatment, welding), solving the problem of the narrow frequency range of traditional thyristor power supplies (with frequencies mostly lower than 500Hz).
High stability and rapid response
By adopting digital control technologies (such as DSP, PLC), it can monitor load changes (such as the fluctuation of furnace material impedance during smelting) in real time, and adjust the output voltage, current and frequency within milliseconds to ensure stable power output (voltage/current stability within ±1% range), meeting the requirements of high-power processes (such as precision heat treatment).
High power factor, friendly to the power grid
Through active power factor correction (PFC) or resonant control, the input power factor can be increased to above 0.95 (traditional thyristor power supplies are mostly lower than 0.85), significantly reducing reactive power losses to the power grid; at the same time, through harmonic suppression design, the harmonic pollution to the power grid is reduced (total harmonic distortion rate THD < 10%), meeting power grid standards.
Main features
With the use of IGBT components, the performance advantages are remarkable.
IGBT combines the high-frequency switching characteristics of MOSFET and the large current carrying capacity of GTR. It has a fast switching speed (at the microsecond level), low on-state resistance, and supports high-frequency design. This reduces the volume of magnetic components such as transformers and reactors, making the overall structure more compact (reducing the volume by 30%-50% compared to traditional equipment).
Digital intelligent control, easy operation
Integrated with touch screens, PLC and other intelligent control systems, it enables precise setting and real-time monitoring of parameters such as power, frequency, and running time; supports the storage of process parameters (such as multiple heat treatment formulas), and can be called up with one click, simplifying the operation; some models can be connected to the Industrial Internet of Things (IoT) to achieve remote monitoring and fault diagnosis.
Comprehensive protection mechanism, with high security
It has multiple protection functions:
Power supply side: Overvoltage, undervoltage, phase loss, overcurrent protection;
Device side: IGBT overheat, overcurrent, short-circuit protection;
Load side: Load short-circuit and open-circuit protection;
Auxiliary system: Water cooling system failure due to water shortage (or air cooling failure), high oil temperature protection, etc., **ensuring the safety of equipment and personnel.
High load adaptability, wide application scenarios
It can stably drive inductive, capacitive or nonlinear loads (such as medium-frequency furnaces, heating coils, welding transformers, etc.), especially when the load changes drastically (such as during the melting process when the furnace material melts), it can still maintain stable output, meeting the needs of various industrial scenarios such as metal melting, forging heating, quenching and tempering, and medium-frequency welding.
Low maintenance cost and long lifespan
The IGBT module adopts a modular design, making replacement convenient; there is no problem of mechanical contact wear, and the average trouble-free operation time (MTBF) can reach over 10,000 hours; the cooling system (air cooling / water cooling) is designed optimally, with high heat dissipation efficiency, reducing faults caused by overheating.
Low noise and environmental compatibility
High-frequency switching technology reduces the electromagnetic noise of the power supply itself. Combined with low-noise cooling fans, the overall operating noise of the machine can be controlled below 75dB. The input voltage range is wide (such as 380V ± 15%), which can adapt to grid fluctuations and is suitable for complex industrial environments.
In conclusion, the IGBT medium-frequency power cabinet, with its advantages such as high efficiency, wide frequency adjustment, and intelligent control, has gradually replaced the traditional thyristor medium-frequency power supply and has become a core equipment in the field of industrial heating and energy conversion.