1. A control apparatus mounted on a railcar including a plurality of wheelsets, the control apparatus comprising: a torque basic value setting portion configured to set a basic value of torque applied to each of the plurality of wheelsets; an adhesion determining portion configured to determine whether or not each of the plurality of wheelsets adheres to a rail; and a torque correcting portion configured to, when the adhesion determining portion determines that each of the plurality of wheelsets does not adhere to the rail, correct the basic value of the torque, applied to each of the plurality of wheelsets, to obtain a corrected value that is smaller than the basic value, wherein: the plurality of wheelsets include one or more specific wheelsets and one or more general wheelsets other than the specific wheelsets; and the torque correcting portion calculates the corrected value of the torque, applied to the general wheelset, in accordance with a first rule and calculates the corrected value of the torque, applied to the specific wheelset, in accordance with a second rule different from the first rule.