SYSTEM FOR CONTROLLING ROTARY ELECTRIC MACHINES TO REDUCE CURRENT RIPPLE ON DIRECT CURRENT BUS

摘要

The system (11) comprises a first' motor (26) for applying rotational energy to a respective first wheel (30) of the vehicle. A second motor (28) is arranged for applying rotational energy to a respective second wheel (32) of the vehicle. A first inverter (22) is coupled to the first motor (28), where the first inverter (22) is capable of receiving direct current electrical energy from the direct current bus (12). The first Inverter (22) is configured to provide a first group of alternating currents with a corresponding reference phase. A second inverter (24) is coupled to the second motor (28). The second Inverter (24) Is capable of receiving direct current electrical energy from the direct current bus (12). The second inverter (24) is configured to provide a second group of alternating currents with a phase shift with respect to the reference phase, such that the phase shift is effective to reduce the direct current ripple on the direct current bus (12).