The pace of new product development for induction heating power supplies has accelerated significantly in recent years. However, regardless of the structure, energy-saving design remains a crucial aspect of new product development, requiring careful attention from researchers. For an induction heating power supply system, energy saving must be considered not only with the power supply itself but also with the appropriateness of the inductor structure and its matching. This article will briefly introduce and analyze how to achieve effective system energy-saving design.
From a system design perspective, energy-saving design of induction heating power supplies is related to multiple factors, including inductor structure, heating system design, and cooling methods. However, in reality, the inductor structure and design are not directly related to the type of induction heating power supply used; this is primarily determined by the user's process requirements. Sometimes, optimizing the inductor design yields far better energy savings than improving the efficiency of the induction heating power supply itself. Conversely, improper matching can result in significant power loss. However, because the inductor structure and design are mainly determined by the user's process requirements, there are many variables, making quantitative analysis of its energy-saving effects difficult.
For the equipment itself, in addition to timely control of reactive power, the power factor of the induction heating power supply itself is also crucial for energy-saving design. Because users need to pay for both active and reactive power. Furthermore, the power factor drop caused by harmonics cannot be compensated for using capacitors. In most cases, equipment does not operate at full power. If an induction heating device's actual operating power factor is only 0.6, then it is obvious that the user's cost for reactive power will far exceed the cost of active power loss due to equipment inefficiency.