Fixing device, image forming apparatus including the fixing device, and fixing method

摘要

A fixing device (1; 1A; 1B) includes a magnetic flux generator (2A), a rotating heat generation member (3; 40), a magnetic flux adjuster (2B), and a driver (5). The magnetic flux generator generates a magnetic flux. The rotating heat generation member rotates and applies heat to a recording medium bearing an image, and includes a heat-generating layer (3C) to generate heat using the magnetic flux generated by the magnetic flux generator. The magnetic flux adjuster is provided outside the rotating heat generation member, and decreases the magnetic flux applied to the heat-generating layer at least in a desired area in an axial direction of the rotating heat generation member. The driver changes the desired area by driving the magnetic flux adjuster in a direction of rotation of the rotating heat generation member.