Induction heating roller device

The induction heating roller device addresses instability in optical transmission by adjusting AC voltage to maintain optimal conditions for the optical transmitter, improving stability and reducing power consumption through resin-sealed rotary transformers.

JP2026084405APending Publication Date: 2026-05-21TOKUDEN CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
TOKUDEN CO LTD
Filing Date
2024-11-11
Publication Date
2026-05-21

AI Technical Summary

Technical Problem

Conventional induction heating roller devices face instability in optical transmission due to changing gap distances between stationary and rotating coils caused by assembly errors and thermal expansion, leading to potential power wastage and reduced efficiency.

Method used

The device employs an AC voltage adjusting unit to stabilize optical transmission by adjusting the frequency or amplitude of AC voltage supplied to the stationary coil, ensuring a reference voltage for the optical transmitter operation, even with shifting coil distances, and incorporates resin-sealed rotary transformers for improved durability and insulation.

Benefits of technology

Stabilizes optical transmission while reducing power consumption by maintaining optimal voltage for the optical transmitter, despite coil misalignment or thermal expansion, enhancing the device's operational reliability and efficiency.

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Abstract

In a signal transmission device that transmits a detection signal from a temperature sensor on a roller to a stationary side, the stability of optical transmission is improved while reducing power consumption. [Solution] The system includes an optical transmitting unit 11 provided on the rotating side that outputs light corresponding to a detection signal, an optical receiving unit 12 provided on the stationary side that receives light from the optical transmitting unit 11, a rotary transformer 13 to which the stationary coil 131 and the rotating coil 132 are electromagnetically coupled to supply power to the optical transmitting unit 11 in a non-contact manner, and an AC voltage adjustment unit 14 to adjust the AC voltage supplied to the stationary coil 131. The stationary coil 131 and the rotating coil 132 form annular shapes wound around the rotation axis 2C of the roller 2 and are provided facing each other with a gap in the direction of the rotation axis of the roller 2. The AC voltage adjustment unit 14 adjusts the frequency or amplitude of the AC voltage to supply the reference voltage necessary for the operation of the optical transmitting unit 11 to the rotating coil 132.
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