MOTOR CONTROLLER

The present invention provides a motor controller in which a total motor torque can be changed at a constant rate if maximum torques that can be generated by winding groups of a plurality of systems lose their balance. An upper limit of a first assist control amount (Ias1*) for a first winding group or a second assist control amount (Ias2*) for a second winding group may be limited to be a value smaller than the original upper limit. In this case, an ECU calculates the first assist control amount (Ias1*) and the second assist control amount (Ias2*) so that the first assist control amount (Ias1*) and the second assist control amount (Ias2*) reach their upper limits at the same timing relative to changes in absolute values of steering torques ([Tau]1, [Tau]2). 本发明提供一种马达控制装置，当通过多个系统的绕组群能够分别产生的最大的扭矩成为不平衡时，能够使总的马达扭矩以恒定的比例变化。存在对第一绕组群的第一辅助控制量(Ias1＊)和对第二绕组群的第二辅助控制量(Ias2＊)中的任一方的上限被限制为比本来的上限小的值的情况。此时，对于转向操纵扭矩(τ1、τ2)的绝对值的变化，ECU以第一辅助控制量(Ias1＊)和第二辅助控制量(Ias2＊)在相同时刻到达各自的上限的方式，运算第一辅助控制量(Ias1＊)和第二辅助控制量(Ias2＊)。