Fixing device and image forming apparatus provided with same

A fixing device comprising:

• a first rotating member heated by a heating device;
• a second rotating member which abuts against the first rotating member to form a fixing nip portion;
• a first drive motor for rotationally driving the first rotating member;
• a second drive motor for rotationally driving the second rotating member;
• a torque limiter provided between the second rotating member and the second drive motor;
• and
• a pressure adjusting mechanism for adjusting a nip pressure between the first rotating member and the second rotating member, wherein
• when the nip pressure is a first pressure greater than a maximum torque that can be transmitted by driving the torque limiter, the second rotating member rotates following the first rotating member and at a same linear speed as a linear speed of the first rotating member, and
• when the nip pressure is a second pressure that is equal to or less than the maximum torque that can be transmitted by driving the torque limiter, the second rotating member is rotated by the second drive motor at a linear speed different from a linear speed of the first rotating member.