Dual-inverter drive apparatus for synchronous motor

A motor drive apparatus for controlling driving of a synchronous motor having two or more armature windings corresponding to respective phases, each armature winding having an open configuration with a first end and a second end thereof unconnected to the ends of other ones of the armature windings, the motor drive apparatus including

• a first inverter having a plurality of first switching elements, with each of the first switching elements connected to the first end of a corresponding one of the armature windings,
• a second inverter having a plurality of second switching elements, with each of the second switching elements connected to the second end of a corresponding one of the armature windings, and
• a control section having a first inverter control circuit and a second inverter control circuit,
• the first inverter control circuit being configured to generate first voltage commands based on an externally supplied torque command value and to generate voltage control signals for the first inverter in accordance with the first voltage commands, and
• the second inverter control circuit being configured to generate second voltage commands based on the torque command value and to generate voltage control signals for the second inverter in accordance with the second voltage commands;
• wherein the control section is configured to determine respective control methods executed by the first inverter control circuit and the second inverter control circuit for generating the voltage commands, such as to avoid control interference resulting from one or more of a set of causes that include at least deviations between update timings of the voltage commands generated by the first inverter control circuit and the second inverter control circuit respectively.