SYSTEM AND METHOD FOR DETECTING VESSEL PRESENCE FOR AN INDUCTION HEATING APPARATUS

摘要

Systems and methods for detecting vessel presence for an induction heating apparatus are disclosed. A detector circuit generates an output signal based on a feedback signal corresponding to a signal, such as current, flowing through an induction heating coil. The output signal has low frequency components that are averaged over multiple integer periods and compared to a reference value to determine the presence or absence of a vessel on the induction heating coil.

主权项

1. An induction heating system, comprising:
an induction heating coil operable to inductively heat a load with a magnetic field; a power supply circuit configured to supply a power signal to said induction heating coil at a relatively high operating frequency; and a detector circuit configured to detect a feedback signal corresponding to a signal flowing through said induction heating coil, said detector circuit providing an output signal having an amplitude dependent on the presence of a vessel proximate said induction heating coil, the amplitude of the output signal determining vessel presence.