28KW High Frequency Induction Heating Machine
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      28KW High Frequency Induction Heater DD-25JQ

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      28KW High Frequency Induction Heater DD-25JQ


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      Product features:

      28KW High Frequency Induction Heating Machine

      1.Adopt imported high-quality IGBT solid power module our second generation of frequency conversion technology,has distinct cooling system to ensure that the device can continually work with maximal power within 24 hours, which improve the performance quality of the device.
      2.Constant current power control function, can make high performance heating result improve heating efficiency.
      3.Simple convenient installation, can work after connecting to 380V power, water inlet, waterlet,professional installation is not required.
      4.Has timing function,can individually adjust heating time,heat-preservation time, digit setting, heating current, heat-preservation current
      5.This device has self-diagnosis alarming system for failure multi-level protection display for overvoltage,overcurrent,overheat,underwater, phase lack.

      Technical parameter:



      Maximum oscillating power


      Input voltage scope

      Three phases 380V

      Input voltage frequency


      Output oscillating frequency


      Input  current


      Heating/retain/cooling time


      Duty cycle


      Cooling water desire

      02MPA >6L/MIN

      Cooling water temperature



      Controller31.5Kg     Transformer27KG

      Main application characteristics:
      These machines have many heating applications,such as(1), Heat treatment of gear shaft (2),Braze of diamond tools,millstone,cincture repair so on (3),Braze of compound pan bottom (4),Heat treatment of compound pipe (5),Pressing moulding of stainless steel wares (6) Braze of woodwork cutters (7),Metals smelting (8),Braze of copper pipes(in airconditioner sanitary fittings).
      Due to the adopting of our second generation inverting control technology, DD-25JQ,DD-35 & DD-45 series machines are characterized with high reliability low repair cost, are one of the most popular models have been used widely in every areas of metal heating.

      Typical applications:

      Application Show

      Advantages applications of models with Timer function of DD-25JQ、DD-35 DD-45:
      1. Heating power, retaining power, heating time, retaining time cooling 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. When using in brazing, with proper timing parameters, rapid heating retaining can be achieved to keep the temperature while the brazing material is melted then to let the brazing material spread smoothly to form good joint.

      Advantages applications of separated transformer:
      1. In these three series machines, the high frequency transformer is separated from the generator, with 6 meters connecting cable at least.
      2. It is suitable to use in the dirty or corrosive surroundings, the generator can be put in a clean space to increase the reliability.
      3. With the small size light weight of the separated transformer, it is convenient to use in the production line easily assembled inside the machinery or moved mechanism.

      Working theory structure
      In DD-25JQ, DD-35 DD-45 series machines, series oscillating circuit is applied, through high frequency transformer, low voltage high current power is output to go through the induction coil.
      Inside these series machines, IGBT module our second generation inverting control technology has been used, that is the dual control inverting technology. In these new technologies, output power oscillating frequency are controlled independently. we use IGBT components high frequency voltage regulate control circuit to control the power we use IGBT components, series oscillating automatic tracing circuit to reach  soft switching in the inverting course, all these make the machine to be more reliable make the machine possible to work continuously with 100% duty cycle.
      Compared to machines with first generation technology, second generation technology is more suitable for large power machines to get higher reliability.
      Due to the adopting of advanced technology, DD-25JQ, DD-35 DD-45 series machines are characterized by larger frequency range, smaller size, water cooled transformer, higher reliability lower repair cost.