Toshiba 350 ユーザーズマニュアル
13 - 5
e-STUDIO350/352/353/450/452/453
FUSER UNIT / PAPER EXIT SECTION
13
© 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved
13.4.2 Heating principle of IH Heater
The magnetic field is generated by applying a high frequency current to the IH coil inside the fuser
roller, which then generates the eddy current in it. When the eddy current flows, the Joule heat is gen-
erated by the resistance element of the fuser roller, which is then heated. In the IH coil method, the
thermal efficiency is higher than the lamp method because the fuser roller is directly heated.
The magnetic field is generated by applying a high frequency current to the IH coil inside the fuser
roller, which then generates the eddy current in it. When the eddy current flows, the Joule heat is gen-
erated by the resistance element of the fuser roller, which is then heated. In the IH coil method, the
thermal efficiency is higher than the lamp method because the fuser roller is directly heated.
B
A
Current flowng on the surface of the fuser roller
Current flowng nsde the
fuser roller
fuser roller
Eddy current
Hgh frequency
magnetc feld
magnetc feld
IH col
Hgh frequency
power source
[Image of current flowng from A to B]
D
T
C
C2
CPU
Voltage
nput
I/F crcut on LGC board
Montorng nput current
Current nput
Montorng nput current
Control crcut hgh frequency current
Smoothng crcut
Tr
(IGBT)
IH col
Fuser roller
IGBT
drve
[Block dagram of hgh frequency power supply]
Photocoupler
Fig. 13-402
Fig. 13-403