Product Overview

KGPS Medium Frequency Power Supply is a classic and mainstream power supply equipment for medium frequency melting furnaces. It adopts mature thyristor parallel inverter technology, featuring stable circuit structure, strong anti-interference ability and wide load adaptation range. The equipment can convert industrial power-frequency alternating current into medium-frequency alternating current, providing continuous and stable power output for the melting furnace body. It can meet the melting and heat preservation production requirements of steel, non-ferrous metals, precious metals and various alloys, and is a highly versatile power configuration in the industrial melting field.

The cabinet of KGPS medium frequency power supply is mainly composed of thyristor rectifier unit, inverter circuit, integrated control system, multi-channel protection unit and filtering and voltage stabilizing structure. It can operate stably in coordination with compensation capacitor bank, water cooling system and furnace tilting system. The equipment supports constant power output mode, has good load matching performance, and can adapt to the whole process of working conditions such as melting heating, constant temperature and continuous material replacement. With low operation failure rate and wide adaptability, it is suitable for regular and stable production of large, medium and small enterprises.

Non-standard products with different power, different melting speeds and capacities can be customized according to user needs

Core Features

• Stable constant power output: Equipped with automatic load matching circuit, it can dynamically adjust parameters according to the melting state of furnace charge and load changes, maintain stable constant power output throughout the whole process, is not prone to power attenuation, ensures uniform melting speed, and improves overall production efficiency.
• Good grid adaptability: It adopts frequency-sweeping zero-voltage soft start mode, with gentle start-up process, no obvious inrush current and small disturbance to the power grid. It can adapt to the conventional power grid environment of the plant, and will not easily affect the operation of surrounding electrical equipment.
• Reasonable energy consumption control: The equipment has excellent power factor performance, which can reach 0.92 or above under conventional working conditions, with low power conversion loss and high utilization rate of power resources. It can control electricity cost for long-term continuous production, with stable energy saving performance.
• Strong anti-interference ability: Adopting integrated digital control circuit, it has neat circuit layout and outstanding anti-interference performance. It can adapt to complex workshop production environment, avoid equipment fluctuation problems caused by electromagnetic interference and voltage fluctuation, and has high operation reliability.
• Multiple protections: It is equipped with standard multiple protection mechanisms including overcurrent, overvoltage, overheating, water shortage, phase loss, etc. When abnormal operation occurs, the device can quickly perform current limiting and shutdown protection, reduce component loss and the probability of fault shutdown, and extend the service life of the equipment.
• Simple operation and maintenance: The control system has an intuitive interface and convenient parameter adjustment, supports regular one-key start and stop, and is easy to operate. The equipment has mature structure, strong versatility of accessories, simple fault troubleshooting, small daily maintenance workload and controllable operation and maintenance cost.
• Wide adaptability to working conditions: With strong load compatibility, it can adapt to various production working conditions such as cold furnace starting melting, frequent start and stop, frequent material replacement, etc. It supports the adaptation and transformation of one power supply matching multiple furnaces, and can meet diversified and continuous melting production requirements.
• Non-standard customization adaptation: It can match melting furnaces of various tonnages, and can provide corresponding non-standard adaptation adjustment schemes according to users' actual requirements of production capacity, power and melting materials.

Working Principle

KGPS medium frequency power supply works based on the thyristor frequency conversion and inversion principle. It first converts three-phase power-frequency alternating current into direct current through the rectifier unit, then converts direct current into medium-frequency alternating current with controllable frequency and power through the inverter circuit, and transmits it to the induction coil of the furnace body. The induction coil generates an alternating magnetic field, which induces eddy current in the metal material inside the furnace, and generates heat relying on the metal's own resistance, so as to realize rapid temperature rise and melting of the material. The equipment can automatically adapt to load changes, dynamically adjust the impedance matching state, maintain stable power output, and ensure a stable and orderly melting process.

Adaptation Technical Parameters

• Adaptable furnace body capacity: 0.1-30 tons (the specific adaptable tonnage is customized according to power and melting metal)
• Oxidation loss: <1%

Applicable Application Scenarios

It is mainly matched with medium frequency melting furnaces of various tonnages, and is widely used in non-ferrous metal smelting, precious metal refining, small-scale steel smelting, hardware casting production, alloy smelting forming, molten metal heat preservation, scrap metal recycling and remelting and other scenarios, which meets the demand for continuous and stable smelting operation in large, medium and small-sized factories.

Technical Parameters of KGPS Medium Frequency Power Supply