Shared-leg voltage source inverter

A system comprising:

• a first motor, a second motor, and a third motor, each respective motor comprising three phases;
• a voltage source inverter circuit comprising multiple respective inverter legs;
• a commutation control circuit including,
• a first voltage transformation block to transform first, second and third sets of space vector voltage signals, corresponding to the first, second, and third motors, to multiple phase voltage signals that include a first shared phase voltage signal and a second shared phase voltage signal, and
• a duty cycle block to modulate the first and second shared phase voltage signals and add a common mode voltage value to the first and second shared phase voltage signals to produce corresponding first and second input control signals;
• wherein a first inverter leg of the voltage source inverter circuit is coupled to impart a first shared excitation signal to a third phase of the first motor and to a first phase of the second motor, in response to the first input control signal;
• and
• wherein a second inverter leg of the voltage source inverter circuit is coupled to impart a second shared excitation signal to a third phase of the second motor and to a first phase of the third motor, in response to the second input control signal.