US 11,903,114 B2
Method for operating an induction hob and induction hob
Christian Egenter, Bretten (DE); and Max-Felix Mueller, Oberderdingen (DE)
Assigned to E.G.O. ELEKTRO-GERAETEBAU GMBH, Oberderdingen (DE)
Filed by E.G.O. Elektro-Geraetebau GmbH, Oberderdingen (DE)
Filed on Jun. 2, 2021, as Appl. No. 17/303,557.
Claims priority of application No. 10 2020 207 103.9 (DE), filed on Jun. 5, 2020.
Prior Publication US 2021/0385912 A1, Dec. 9, 2021
Int. Cl. H05B 6/06 (2006.01); H05B 6/04 (2006.01)
CPC H05B 6/062 (2013.01) [H05B 6/04 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for operating an induction hob (100), the method comprising the steps of:
a) providing the induction hob (100) that comprises: an inverter (1), which is supplied with a supply voltage (US), at least one capacitor (2, 3), and an induction heating coil (4), wherein the at least one capacitor (2, 3) and the induction heating coil (4) are interconnected such that they constitute an oscillating circuit (5),
b) generating, via the inverter (1) a pulse-width modulated excitation voltage (UA) for the oscillating circuit (5) from the supply voltage (US), the pulse-width modulated excitation voltage (UA) having a predefined voltage characteristic,
c) measure a resulting oscillating circuit current (iS),
d) determine electrical oscillating circuit parameters, according to the voltage characteristic of the pulse-width modulated excitation voltage (UA) and the measured resulting oscillating circuit current (iS),
e) repeat steps b) to d) n-times each time using a different voltage characteristic of the pulse-width modulated excitation voltage (UA) for the determination of electrical voltage characteristic-dependent oscillating circuit parameters, wherein for variation of the different voltage characteristics of the pulse-width modulated excitation voltage (UA), the supply voltage (US) is varied, and
f) determine operating variables of the induction hob (100) based on the electrical voltage characteristic-dependent oscillating circuit parameters.