Medium frequency machines are usually used in the penetration heating occasions, For example,
（1）Rod heating for forging
（2）Melting of almost all kinds of metals
（3）Heating of stators or rotors for fitting
（4）Heating of tube end for extrusion
（5）Heating of moulds
（6）Deep quenching of shafts and gears
（7）Tempering or Preheating of weld-joint and etc.
Generally to say, We do not have whole set of SPZ machines in stock, we have stock of only GMF generator, whereas the capacitor and heating coil or heating furnace will be designed and manufactured as per the work pieces and heating requirement of customers.
We need below information from customer for consultation and purchase:
(1)Material and dimension of the work piece to be heated,
(2)Heating application and speed, heating time required; total piece heating or only surface heating? If surface heating, how much thickness? Etc.
(3)Any restriction on the shape and size of the coil? If it is heating from inside or outside? If the coil is enclosed or C-shaped? Is there any metal material easily induction heated within100 mmfrom the coil?
(4)Any requirement for the frequency?
(5)Heating environment: in open air or vacuum? Is there any protection gas?
(6)Any other detail in relation to the machine design?
1. This structure is most commonly used. Our medium-frequency forging furnace and medium-frequency melting furnace adopt this structure, with low loss, high work efficiency and low manufacturing cost.
2, the size of the induction ring: the induction circle is relatively long, usually with a copper tube of 3 meters - 10 meters long.
3. Since the intermediate frequency power supply is directly output, the voltage on the induction coil is up to 550V and is not isolated from the main power, so the induction coil must be well insulated and cannot be directly exposed.
the main features:
(1) GMF series IF power supply adopts IGBT power device and advanced variable current control technology---double-regulated variable current control technology based on parallel resonance. The power and frequency conversion are independently regulated. The IGBT switching device and the amorphous inductor are used to form a high-frequency chopper circuit to adjust the power. The IGBT parallel resonance and frequency automatic tracking technology are used to obtain an accurate soft-switching control inverter process, so that the device is under high power. The reliability of the work has been greatly improved, and the equipment has been developed in the field of high power, and the 100% equipment duty ratio is realized.
(2) The frequency range is large, from 1KHZ to 20KHZ, which can be matched according to the specific heating workpiece size or the depth of heat penetration, and the adaptation range is large.
(3) Adopting the traditional IF parallel resonant structure, the load matching is simple, the equipment efficiency is high, and the utilization rate is high.
(4) Capacitors use high-quality power capacitors, stable and reliable
Main applications：
Medium frequency machines are usually used in the penetration heating occasions, For example,
（1）Rod heating for forging
（2）Melting of almost all kinds of metals
（3）Heating of stators or rotors for fitting
（4）Heating of tube end for extrusion
（5）Heating of moulds
（6）Deep quenching of shafts and gears
（7）Tempering or Preheating of weld-joint and etc.
