Motor control system and power steering system

A motor control system for driving a motor having a phase number n of three or more, comprising:

• an inverter that drives the motor;
• and
• a control calculation unit that calculates a current command value indicating a current to be supplied to the motor from the inverter on a basis of a target current command value given from outside as a control target of the motor, and feeds back an actual current detection value indicating a current supplied to the motor from the inverter to the current command value to feedback-control the inverter, wherein
• the control calculation unit includes
• a voltage control calculation unit that calculates a voltage command value indicating a voltage to be applied to the motor from the inverter on a basis of a current deviation between the current command value and the actual current detection value,
• a torque ripple compensation calculation unit that adds a compensation value for compensating a torque ripple in the motor to a signal value on at least one of an upstream side and a downstream side in a signal flow that passes through the voltage control calculation unit, and
• a current limit calculation unit that limits the current command value before addition of the compensation value by adaptive control based on an actual angular velocity value indicating an angular velocity at which the motor rotates,
• wherein the inverter is configured to control the motor based on the current command value.