By S. Zinn
This publication presents a very good evaluate of the variety of functions of induction heating with tools through which traditional in addition to distinct heating jobs may be designed round the services of the process.
The ebook discusses the speculation of induction heating, tuning of induction heating circuits and cargo matching and summarizes significant gear issues in designing induction heating platforms. layout methods are completely coated for warmth treating. The booklet encompasses a unique dialogue on basics of technique regulate for a number of induction heating concerns.
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Additional info for Elements of Induction Heating: Design Control and Applications (06522G)
If the *Note that this assumes a parallel resonant tank circuit. If the power factor is lagging, the lagging component of the current I 2 (in Fig. 5) is too great, and the leading component, or the current through the capacitor, must be increased. Because this leading component is equal to E/Xc, Xc must be decreased. Therefore, the capacitance must be increased. 40 Elements of Induction Heating: Design, Control, and Applications power factor leads, capacitance must be removed. The power must be off while changes are made in the capacitor bank.
The system will always operate at the peak of the resonant curve, but no change in power output will occur as a magnetic material passes through the Curie temperature. The only change will be a shift in the operating frequency. If it is desired to select a specific frequency, depending on the application, capacitor taps can be adjusted to meet this requirement. Because the system always operates at the resonant frequency of the tank circuit, its power factor is usually close to unity, and therefore impedance matching by means of a transformer-tap change is the only routine adjustment that need be made to secure optimum power output.
Power requirements for induction heating are also dependent on the specific application. In through-heating applications, the power needed is generally based on the amount of material that is processed per unit time, the peak temperature, and the material's heat capacity at this temperature. Power specification for other operations, such as surface hardening of steel, is not as simple because of the effects of starting material condition and heat conduction to the unhardened core. Nevertheless, guidelines in such situations are available (Chapter 6).