US 12,348,052 B2
Device for wirelessly transferring power toward a consumer by way of inductive coupling
Christian Egenter, Bretten (DE); Ulrich Waechter, Bruchsal (DE); Max-Felix Mueller, Oberderdingen (DE); and Mathias Bellm, Ubstadt-Weiher (DE)
Assigned to E.G.O. Elektro-Geraetebau GmbH, Oberderdingen (DE)
Filed by E.G.O. Elektro-Geraetebau GmbH, Oberderdingen (DE)
Filed on Sep. 26, 2023, as Appl. No. 18/474,430.
Claims priority of application No. 10 2022 210 534.6 (DE), filed on Oct. 5, 2022.
Prior Publication US 2024/0120774 A1, Apr. 11, 2024
Int. Cl. H02J 50/10 (2016.01); H05B 6/12 (2006.01)
CPC H02J 50/10 (2016.02) [H05B 6/1236 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A device (100) for wirelessly transferring power toward a consumer (200) by way of inductive coupling and/or for heating an item of cookware (200) by way of inducing eddy currents, wherein the device (100) comprises:
a rectifier (101) for generating a DC voltage (UG) from a line voltage (UN),
an inverter (102) which is configured to generate a pulse-width-modulated drive signal (AS), and
a power coil (103) driven by way of the pulse-width-modulated drive signal (AS), which power coil is configured to generate an alternating magnetic field for power transfer and for measurement purposes,
wherein:
the inverter comprises: a first semiconductor switching means (104), a second semiconductor switching means (105), and a third semiconductor switching means (106),
in a first operating mode (B1), the inverter (102) is configured to generate the pulse-width-modulated drive signal (AS) for power transfer as a function of the DC voltage (UG),
in a second operating mode (B2), the inverter is configured to generate the pulse-width-modulated drive signal (AS) for measurement purposes depending on a measurement voltage (UM), wherein the DC voltage (UG) is higher than the measurement voltage (UM) during the second operating mode,
the first semiconductor switching means (104) and the second semiconductor switching means (105) are looped in in series between a first circuit node (107) and a second circuit node (108), wherein the DC voltage (UG) is present between the first circuit node (107) and the second circuit node (108) and wherein a connecting node (109) of the first semiconductor switching means (104) and of the second semiconductor switching means (105) is electrically connected to the power coil (103), and
the third semiconductor switching means (106) and the first semiconductor switching means (104) are looped in in series between the third circuit node (110) and the second circuit node (108), wherein the measurement voltage (UM) is present between the third circuit node (110) and the second circuit node (108).