EP 2190261 B1 20120111 - Magnetron high voltage supply with frequency recognition
Title (en)
Magnetron high voltage supply with frequency recognition
Title (de)
Magnetron-Hochspannungsversorgung mit Frequenzerkennung
Title (fr)
Alimentation haute tension au magnétron dotée d'une reconnaissance de fréquence
Publication
Application
Priority
EP 08291102 A 20081121
Abstract (en)
[origin: EP2190261A1] The voltage supply unit (10) has a transformer (16) provided with a primary winding (18) and a secondary winding (20). A voltage multiplication- and rectification circuit (24) is provided with a diode (26) and capacitors (30, 32). The voltage multiplication- and rectification circuit rectifies secondary voltage induced in the secondary winding and multiples the voltage. A frequency detection circuit (34) i.e. digital frequency counter, detects alternating current frequency of the transformer. A switch (28) adjusts capacitance of the capacitors depending on the detected frequency. An independent claim is also included for a method for producing high voltage for a magnetron to produce microwaves in a cooking appliance.
IPC 8 full level
H05B 6/66 (2006.01)
CPC (source: EP)
H05B 6/68 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DOCDB simple family (application)
EP 08291102 A 20081121