Title :
Control system design and small-signal analysis of a phase-shift-controlled series-resonant inverter for induction heating
Author :
Grajales, L. ; Lee, F.C.
Author_Institution :
Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
A phase-shift-controlled series-resonant inverter operating at zero-voltage-switching (ZVS) is used as the power supply for an induction heating system. This system has two control loops: the phase-shift control loop regulates the output power; and the frequency control loop ensures ZVS for all load conditions. The design and implementation of these control loops are explained. The complete closed-loop small-signal model is obtained using the extended describing function method. The model predictions are compared with experimental data measured from a lab prototype
Keywords :
DC-AC power convertors; closed loop systems; control system analysis; control system synthesis; describing functions; frequency control; induction heating; invertors; phase control; power control; resonant power convertors; switching circuits; ZVS; control system design; experiments; extended describing function method; frequency control loop; induction heating; load conditions; output power regulation; phase shift control; power supply; series-resonant inverter; small-signal analysis; zero voltage switching; Control systems; Frequency control; Inverters; Power generation; Power supplies; Power system modeling; Predictive models; Prototypes; System analysis and design; Zero voltage switching;
Conference_Titel :
Power Electronics Specialists Conference, 1995. PESC '95 Record., 26th Annual IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-2730-6
DOI :
10.1109/PESC.1995.474849
