公开(公告)号：EP4240107A1

公开(公告)日：2023-09-06

申请号：EP22159840.2

申请日：2022-03-02

申请人： Whirlpool Corporation

发明人： Baldo, Salvatore ,  Gallivanoni, Andrea ,  Pastore, Cristiano Vito ,  Zoppi, Andrea

IPC分类号： H05B6/06

摘要： The ticking noise that can be heard when a switching converter is operated to deliver a power level smaller than the minimum power level for having a soft-switching is due to the fact that during the OFF interval there is no power delivery and the DC-bus capacitance is charged at the peak of rectified mains line voltage.
This drawback may be overcome by disconnecting from the input AC terminals the DC-bus to prevent it from being charged, so as the DC voltage is null or smaller than a minimum nominal value when a next ON time interval T 1 begins.

公开(公告)号：EP3562268B1

公开(公告)日：2020-10-21

申请号：EP19168555.1

申请日：2019-04-10

申请人： Whirlpool Corporation

发明人： Baldo, Salvatore ,  Gallivanoni, Andrea ,  Parachini, Davide ,  Pastore, Cristiano Vito

IPC分类号： H05B6/06

公开(公告)号：EP3562266B1

公开(公告)日：2020-08-05

申请号：EP19168549.4

申请日：2019-04-10

申请人： Whirlpool Corporation

发明人： Baldo, Salvatore ,  Gallivanoni, Andrea ,  Parachini, Davide ,  Pastore, Cristiano Vito

IPC分类号： H05B6/06

公开(公告)号：EP3562266A1

公开(公告)日：2019-10-30

申请号：EP19168549.4

申请日：2019-04-10

申请人： Whirlpool Corporation

发明人： Baldo, Salvatore ,  Gallivanoni, Andrea ,  Parachini, Davide ,  Pastore, Cristiano Vito

IPC分类号： H05B6/06

摘要： A control circuit (30) for an induction heating device comprises a D.C. power supply (46), referenced to a ground connection (54) and configured to supply power to the induction heating device. A switching device (86) is configured to be selectively activated to control the induction heating device. The switching device (86) is connected on one end to the ground connection (54). A resonant load (36) is disposed between the D.C. power supply (46) and the switching device (86), the resonant load (36) comprises a capacitor (42) and an inductor (40) connected in a parallel configuration. At least one rectifying device (34) is disposed in series with the resonant load (36) and the switching device (86). The switching device (86) is configured to control current from the D.C. power supply (46) through the resonant load (36).

公开(公告)号：EP3474631A1

公开(公告)日：2019-04-24

申请号：EP18202171.7

申请日：2018-10-23

申请人： Whirlpool Corporation

发明人： Baldo, Salvatore ,  Moroni, Stefano ,  Parachini, Davide ,  Pastore, Cristiano Vito ,  Prestigiacomo, Gioacchino

IPC分类号： H05B6/06 ,  H05B6/08

摘要： An induction cooking system (10) comprises a power supply bus (52) and a plurality of resonant inverters (44, 100) in connection with the power supply bus (52). Each of the resonant inverters (44, 100) comprises a dedicated resonant capacitor (60, 102). The system (10) further comprises a plurality of inductors (16) configured to generate an electromagnetic field in connection with the resonant inverters (44, 100). At least one switch (64, 72) is configured to control a plurality of switch configurations. A tuning capacitor (62) is in connection with each of the dedicated resonant capacitors (60, 102) via the at least one switch (64, 72). The at least one switch (64, 72) is configured to selectively connect the tuning capacitor (62) in parallel with one of the dedicated resonant capacitors (60, 102) in each of the plurality of switch configurations.