An inkjet printing apparatus that can perform printing with a single printing speed even in a case of being connected with a post-processing apparatus having a different transport speed, and that can suppress increased apparatus costs. A dynamometer system is provided with an encoder for detecting the angular velocity, a shaft-torque meter for detecting the shaft torque, and a control device for controlling the dynamometer on the basis of the angular velocity of the dynamometer and the detection value of the shaft-torque meter. Two capacitive elements and a resistive element are coupled between a second node and each of the inverting input terminal, the output terminal, and the common node. The inverter switches may also be driven directly from the inverter circuit without a separate controller being required. 5 to 5% by weight of a diene, containing 15% to 40% by weight alpha-olefin, and having solubility in xylene at room temperature greater than 35% by weight, the intrinsic viscosity of the xylene soluble fraction ranging from 1.