600​KW-3000KW-12 pulse-IGBT and thyristor power supply

IPM Introduction

Ningbo Haitian Electric Furnace was established in 1992 and has been committed to the production and research and development of intermediate frequency smelting furnaces. In 1999, it launched a single board constant power controlled thyristor parallel inverter intermediate frequency power supply, which saves 6% energy compared to traditional smelting furnaces. In 2003, it launched a thyristor series inverter intermediate frequency power supply, which saves 7% energy compared to parallel connection. In 2009, it collaborated with the Huanhu Electric Furnace (Dai Guangzu team) to launch an IGBT power supply, which further improves the energy-saving effect and saves 6% energy compared to thyristor power supply, In 2019, a new dual DSP controlled IPM power supply was launched, which does not require reactors and saves 10% -20% energy compared to previous thyristor power supplies. The IPM output power covers 5KW-6300KW. This series of power supplies has been successfully applied to 10KG-12T intermediate frequency electric furnaces.

Haitian electric furnace IPM module power supply has the following features:

1. Building block type The design solves the problem that the power of IGBT power supply is not big in the past. The power can cover 5KW-6300KW and higher, and the power can be expanded infinitely, breaking through the technical bottleneck that the power of the IGBT is unstable in the past.

2. The Haitian IPM intermediate frequency melting system adopts MATLAB software simulation design to ensure that the whole set of equipment has the highest efficiency, the best reliability and stability.

3, N+1 redundancy theoretical design, each redundant module of the equipment, the reliability is improved by an order of magnitude, each module unit operates independently, intelligently according to the output power Distribute current, any module will automatically exit when fault occurs, and other units will automatically redistribute current, which truly solves the problems of easy damage, difficult maintenance, labor and time-consuming of IGBTs in the past.

4. Multi-layer busbar design, the multi-layer busbar is designed through MATLAB software simulation, which cleverly solves the problem of busbar heat dissipation, solves the influence of distributed inductance, and solves the problem of heat dissipation. And the impact of the peak voltage on the IPM makes the IPM more reliable, stable and not easy to damage, which solves the problem that the IGBT was often damaged in the past.

Second, environmental protection and energy saving

1. Haitian IPM intermediate frequency power supply adopts advanced microcomputer full-digital fuzzy control, eliminating the need for reactors and more energy-saving than previous IGBT power supplies.

2. The IPM module is a device that can be turned off, and there is no reactive current during the inverter, so the inverter loss is lower than that of the thyristor, and the protection is more reliable and rapid. , not easily damaged.

3. Air-core inductors are not needed in the inverter circuit of the IPM module, which reduces energy loss. The above three points can save about 7% of electricity compared with the previous thyristor power supply.

4. The power factor of the coil of the IPM modular electric furnace can be close to 1, and the passing current is small, so the loss is small. It can save about 7% of electricity.

5. Using ZVS and ZIS control technology, ZPM adopts zero-voltage and zero-current turn-off and turn-on during commutation, which reduces the switching loss of IPM and improves the Equipment working efficiency and energy saving.

6. Haitian IPM intermediate frequency melting furnace saves electricity by 10-20% compared with traditional thyristor power supply, and the melting time of each furnace can be reduced by 10-20 minutes. The equipment investment can be recovered by saving electricity bills during the year.

Third, easy maintenance

1. Haitian IPM intermediate frequency power supply adopts dual DSP (US) control, which truly realizes full digital and remote control, which overcomes the need for debugging personnel to adjust the potentiometer on site in the past. It is troublesome and has a "self-diagnosis" function, which displays the cause of the fault and the location of the fault, avoiding the trouble of blindly looking for faults by maintenance personnel in the past. It is fully integrated and fully computerized, which greatly improves the reliability and stability of equipment operation.

2. The reasonable and ingenious layout of IPM and radiator not only improves equipment efficiency, but also makes maintenance more convenient. Replacing IPM is easier and easier to operate than replacing thyristor. It solves the complicated process of replacing IGBT modules and greatly reduces the maintenance time.

3. Overcoming the shortcomings of easy damage, difficult maintenance and high maintenance costs of IGBTs in the past, Haitian electric furnace IPM module power supply is more stable and reliable than traditional thyristors, and accessories The price is almost the same as that of the thyristor. The key is that the stability and service life of the IPM power supply are several times higher than that of the thyristor power supply.

IV. Environmental requirements

IPM power supply overcomes the shortcomings of previous IGBT's high requirements for the surrounding environment, and Haitian electric furnace IPM can be used in any environment without damage.

V. Unique design

1. New signal sampling, new signal sampling solves the problem of high-power IPM control signal sampling.  

2. The IPM module power supply of Haitian electric furnace is an upgrade board of the previous IGBT power supply

3,  Haitian IPM intermediate frequency smelting power supply has a unique design in terms of high-power overall layout, modules, power supplies, etc. The stability, energy saving, maintenance and other aspects of the equipment are of higher quality than Yizhu thyristor intermediate frequency power supply. leap.

   With the successful launch of Haitian IPM module high-power power supply, it will become a reality that IPM power supply will completely replace thyristor power supply within five years.

   Haitian IPM electric furnace for intermediate frequency melting is fully guaranteed for 18 months free of charge (no warranty for leaking furnace)