Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Reexamination Certificate
2006-06-02
2008-09-02
Han, Jessica (Department: 2838)
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
C219S663000, C323S285000
Reexamination Certificate
active
07420828
ABSTRACT:
The present invention provides an induction heating apparatus that can detect that a power factor correction circuit is in operation or in non-operation. The induction heating apparatus includes a power factor correction circuit that corrects a power factor of an inputted direct-current power supply by turning on and off a switching element connected to a choke coil, a booster circuit that boosts an output voltage of the power factor correction circuit by turning on and off a switching element connected to a choke coil, an inverter circuit that inputs the output voltage of the booster circuit to generate a high-frequency current in a heating coil by turning on and off a switching element, and an inverter circuit drive control unit that, in driving the power factor correction circuit, controls output of the inverter circuit such that an input current reaches a target value and detects the voltage in the booster circuit. The inverter circuit drive control unit stops the output of the inverter circuit when it is detected that the power factor correction circuit is in non-operation.
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Patent Cooperation Treaty (PCT) International Preliminary Report on Patentability, issued Dec. 6, 2007 in International Application No. PCT/JP2006/311094.
Hirota Izuo
Ishio Yoshiaki
Sadakata Hideki
Tominaga Hiroshi
Han Jessica
Matsushita Electric - Industrial Co., Ltd.
Wenderoth , Lind & Ponack, L.L.P.
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