Keating & Bennett
Motor controller and power steering device
A motor controller includes an inverter that drives a motor, an operation controller that controls the inverter according to a current command value, and a torque ripple compensation generator that adds a compensation value to compensate for a torque ripple in the motor to the current command value. The operation controller uses, as the current command value, a q-axis current command value indicating a q-axis current in a rotational coordinate system of the motor, and also uses, as the current command value, at least temporarily a d-axis current command value indicating a d-axis current in the rotational coordinate system, and the torque ripple compensation generator calculates a phase difference of the compensation value with respect to the q-axis current command value according to an equation using the q-axis current command value and the d-axis current command value as variables.
NIDEC CORPORATION NIDEC ELESYS CORPORATION
H H B H B H H H B H H
H02P H02P B62D H02P B62D H02P H02P H02P B62D H02P H02P
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Tomoya Shuji Tomonari Tokuji Masanori
Ueda Endo Mori Tatewaki Watahiki