| US 7,573,007 B2 | ||
| Power supply, image forming apparatus, and electric current supply method | ||
| Junji Ishikawa, Moriya (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, (Japan) | ||
| Filed on Aug. 25, 2006, as Appl. No. 11/467,280. | ||
| Claims priority of application No. 2005-249951 (JP), filed on Aug. 30, 2005. | ||
| Prior Publication US 2007/0045293 A1, Mar. 01, 2007 | ||
| Int. Cl. H05B 1/02 (2006.01); H05B 6/08 (2006.01); H05B 6/04 (2006.01); G03G 15/00 (2006.01); G03G 15/20 (2006.01); H02H 3/08 (2006.01); H02H 9/02 (2006.01) | ||
| U.S. Cl. 219—497 [219/664; 219/665; 219/668; 399/37; 399/67; 399/88; 361/93.1] | 12 Claims |
| 1. A power supply which supplies an AC electric current to a coil of a heating unit employing an electromagnetic induced heating
method via a connector connecting a plurality of wires, comprising:
a first electric current supply device which supplies an electric current to the coil via a first wire;
a second electric current supply device which supplies an electric current to the coil via a second wire;
a first detection device which detects an electric current fed back to the power supply via a third wire through the coil;
a second detection device which detects an electric current fed back to the power supply via a fourth wire through the coil;
an abnormality monitoring device which monitors an abnormality of supply of an electric current to the coil or an abnormality
of the third wire or the fourth wire on the basis of the electric currents detected by said first detection device and said
second detection device; and
a control device which controls to stop driving said first electric current supply device and said second electric current
supply device in accordance with a monitoring result by said abnormality monitoring device.
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