Motor system

A motor system, comprising:

• a first inverter which converts direct current power from a first power supply into alternating current power;
• a second inverter which converts direct current power from a second power supply into alternating current power;
• a motor which is driven by the alternating current power from the first inverter and the alternating current power from the second inverter;
• and
• a control unit which is configured to calculate a motor voltage vector including a corresponding excitation voltage command and a torque voltage command in response to an output request for the motor and changes a first inverter voltage vector and a second inverter voltage vector while maintaining the motor voltage vector obtained to allow distribution of the motor voltage vector at any ratio,
• wherein the first inverter voltage vector includes a first excitation voltage command and a first torque voltage command associated with an output from the first inverter, and the second inverter voltage vector includes a second excitation voltage command and a second torque voltage command associated with an output from the second inverter.