When designing an inductor for a medium frequency induction heating device, how are its basic dimensions determined?

As an indispensable part for heat treatment of workpieces, the inductor is an important part of medium frequency induction heating equipment. Its quality, size and heat treatment quality of the workpiece have a great impact. Therefore, we must be extra careful when making sensors. Regarding the design of the inductor, I suggest you read this article on how to design the inductor of medium frequency induction heating equipment. Today, our technical staff will focus on telling you how to determine the basic size of the sensor when designing it?

1. Design of conductive plate (tube)

The power on the inductor is distributed along the length of the conductor. In order to distribute more power to the effective part, the conductive part should be short rather than long. Since the resistance is inversely proportional to the conductive cross-sectional area, the conductive plate should be wide rather than narrow.

2. Selection of plate (tube) thickness

The thickness of the plate (tube) should be greater than 1.57d copper, at which time the resistance of the conductor is the smallest.

3. Design of contact plate (tube)

It should be ensured that this part can be connected to the quenching transformer (or sensor chuck) reliably, closely, firmly, and have a certain contact stress; the fitting surface should be straight, and the surface roughness value should not be higher than the specified value. The contact surface should be as follows: It is better to use a concave boss.

The sensor compression bolts of medium frequency induction heating equipment should be no less than 2 M12. Contact plate thickness should be greater than 1.57d copper, but less than 12mm. The board width changes according to the power the sensor can withstand. Choose between 60-190mm. When the power is high, choose the upper limit.

4. Design of effective circle height

1) When the inner hole of the workpiece is quenched, the height difference between the effective circle height of the heating sensor with a frequency of 20-400KHz and the height of the workpiece is 3-7mm. , while the frequency is 2.5-10KHz and the height difference is 2-5mm.

2) When the middle section of the long shaft is quenched and heated, the heat absorption factors at both ends of the shaft must be considered. Generally, the effective circle width should be 10%=-20% larger than the heating zone width, and the upper limit is used when the power density is small.

3) When the inductor is semi-annular, the temperature at both ends of the journal can be increased by increasing the length of the radial conduit.

4) In order to avoid the crescent-shaped hardened layer on the cross section of the workpiece, both ends of the effective ring can be designed as convex platforms, with a convex height of 0.5-1.5mm and a width of 3-8mm.

This article briefly introduces how to determine the basic dimensions of the sensor. Zhengzhou Gou's is a manufacturer that produces and sells induction heating equipment and has accumulated rich experience in the manufacturing of inductors. If you want to know more information, please leave us a message.