Medium frequency induction furnace structure

A medium-frequency induction furnace is a type of electric furnace used for melting metals, particularly in foundries and metalworking industries. induction furnace structure is designed to generate heat through electromagnetic induction and melt metals efficiently. Below is an overview of its key components and structure.

1. Power Supply System

ความถี่ปานกลาง พาวเวอร์ซัพพลาย: Converts standard AC power (50/60 เฮิรตซ์) into medium frequency AC (typically 150 เฮิรตซ์ถึง 10,000 เฮิรตซ์). This is achieved using a rectifier, อินเวอร์เตอร์, and capacitors.
Rectifier: Converts AC to DC.
Inverter: Converts DC back to AC at the desired medium frequency.
Capacitors: Store and regulate electrical energy to ensure stable operation.

2. คอยล์เหนี่ยวนำ

Copper Coil: A water-cooled copper coil surrounds the crucible. It generates an alternating magnetic field when medium frequency AC passes through it.
Magnetic Field: The alternating magnetic field induces eddy currents in the metal charge, generating heat through resistance.

3. เบ้าหลอม

Refractory Lining: The crucible is made of refractory materials (เช่น, ceramic or graphite) to withstand high temperatures and contain the molten metal.
Tilt Mechanism: Some furnaces have a tilting mechanism to pour molten metal.

4. ระบบทำความเย็น

Water Cooling: The induction coil and other components are water-cooled to prevent overheating and ensure efficient operation.
Cooling Tower or Chiller: Maintains the temperature of the cooling water.

5. ระบบควบคุม

PLC (Programmable Logic Controller): Automates and monitors the furnace operation.
Temperature Sensors: Measure and regulate the temperature of the molten metal.
Frequency and Power Controls: Adjust the frequency and power output for optimal melting.

6. Furnace Body

Steel Frame: Provides structural support for the furnace.
ฉนวนกันความร้อน: Minimizes heat loss and improves energy efficiency.

7. Charging and Pouring System

Charging Hopper: For adding raw materials (scrap metal, alloys, ฯลฯ).
Pouring Spout: For transferring molten metal to molds or ladles.

8. คุณสมบัติด้านความปลอดภัย

Overheat Protection: Prevents damage from excessive temperatures.
Leak Detection: Monitors for molten metal leaks.
Emergency Shutdown: Ensures safe operation in case of malfunctions.

Working Principle

The power supply generates medium frequency AC, which flows through the induction coil.
The coil creates an alternating magnetic field, inducing eddy currents in the metal charge.
The resistance of the metal to these currents generates heat, melting the metal.
The molten metal is then poured for casting or further processing.