| 摘要 |
The invention relates to a method for dynamic wave form correction of a power supply of an induction heating device (3), a) where an input power signal (Uin), especially an input voltage signal, comprising waves with an input power frequency (fin) is provided by an AC power source (1), b) where a frequency converter (2) rectifies the input power signal (Uin) into a half waves signal (Uh), especially a half wave voltage signal, b1) where a half wave of the half waves signal is delimited by two subsequent zero-crossings (t&thetas;, t1;t1, t2; t2, t3), b2) where the time lag between the two zero-crossings defines a half wave duration (th), c) where the frequency converter (2) further converts the half waves signal (Uh) into to a working signal (Iw), especially a working current signal, for supplying the induction heating device (3), d) where in a frequency shifting operation (5) a working frequency (fw) of the working signal (Iw) is first increased from a first working base frequency (f1) to a maximum frequency of (fmax) and then decreased to a second base frequency (f2) within a time, which is smaller than the half wave duration (th), e) where the first working base frequency (f1) is not equal to the second working base frequency (f2) and/or a zero crossing (t0, t1, t2, t3) of the half wave signal (Uh) is passed within the frequency shifting operation. Furthermore, the invention relates a an arrangement for dynamic wave form correction of a power supply of an induction heating device (3), particularly according to one of the preceding claims, a) with an AC power source (1) for providing an input power signal (Uin), especially an input voltage signal, comprising waves with an input power frequency (fin), b) with a frequency converter (2) for rectifying the input power signal (Uin) into a half waves signal (Uh), especially a half wave voltage signal, b1) where the frequency converter (2) preferably comprises at least one full bridge and/or at least one half bridge and/or a single switch, b2) where a half wave of the half waves signal is delimited by two subsequent zero-crossings (t&thetas;, t1;t1, t2; t2, t3), b3) where the time lag between the two zero-crossings defines a half wave duration (th), c) where by the
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