90KW-160KW Medium Frequency Induction Heating Machine

(1)All-solid-state IGBT inverter functional regulation,soft switching dual resonant frequency control auo-tracking technology are high-reliability assurance.
(2)Ultra-smal volume,saving customers 10 times the production space.
(3)Efficiency,within the framework of full power,high power factor power efficiency.
(4)Broadb 1-20KHZ frequency automatic tracking adapt to, not at the scene debugging.
(5)100% full load,24 hours of continuous work.
(6)Constant output voltage/constant output power control features selected.
(7)Frequency,power,voltage current the whole show.

Technical Parameter:

Main application:
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 gears ( 7) Tempering or Preheating of weld-joint etc.

Typital applications;

Application Show

Metal smelting

Main Characteristics:
(1)In medium frequency machines,parallel oscillating structure is used . IGBT module power components our fourth generation inverting control technologies are applied.
(2)Wide frequency ranges from 1KHZ to 20KHZ, it is easy to match the machine according to the parts heating desire.
(3)Due to the parallel oscillating structure, it is easy to get the best matching of the machine to get high heating efficiency full power output of generator.
(4)Due to the high technologies of our fourth generation inverting control, soft accurate switching control is realized to assure the high reliability low repair of the machine

Advantages applications of models with Timer function::
1. Heating power, retaining power, heating time, retaining time can be preset adjusted, this makes it possible to control the heating curve heating time.
2. It is suitable to use in the repeated heating or high speed heating of small parts;
3. By presetting the timer the power of the generator, retaining can be realized to a certain extent.

Main circuit of the SPZ medium frequency heating machine:
As said above, parallel oscillating structure is applied in our SPZ medium frequency heating systems. There are two kinds of combinations usually used now according to the different applications:

Combination 1: M.F. generator + compensating cap + coil

This is the most popular combination widely used now, for example, the M.F. forging furnace melting furnace. Machine of this kind is simple, low cost, high efficiency.
In this combination, the coil is large or long, usually 3 to 10 meters long copper tube is needed to turn the coil. There is 550V high voltage directly between the coil is not safe. So to ensure the safety of the operator, the coil must be insulated properly.

Combination 2:Generator + (compensating cap + transformer)+coil

This combination is also used widely, for example, melting furnace in vacuum medium frequency quenching.
In this combination, Different output current voltage can achieved through the changing of the ratio of the transformer to fit different applications.
In this combination, coil is isolated from the main circuit, so the coil is safe need low insulation or no insulation.
Due to the adding of the transformer, the size the cost of the whole heating system are raised, at the same time, transformer increases the energy consumption. The lower the frequency, the more the affection is.

The Control theory of the Generator:
Inside the generators, IGBT module our fourth generation inverting control technology has been used, that is the soft dual control inverting technology on the basis of parallel oscillating circuit. In this technology, output power frequency can be controlled adjusted separately, IGBT module soft switching control technology are used in the high frequency switching circuit to control the output power. In the inverting circuit, the IGBT frequency tracing circuit is applied to achieve high speed accurate soft switching control. The adoption of new technologies not only improves the quality reliability of the machine,but also solve the technology problem on large power induction heating machine makes it possible to work 100% duty cycle.