Patent ID: 7133602

Claim:
A power supply apparatus ( 20 ) driving and controlling a motor (MG 1 , MG 2 ), comprising: a DC power supply ( 10 ); a converter ( 110 ) converting a first DC voltage (Vb) from said DC power supply into a second DC voltage (Vm) according to a voltage command value (Vmr) to output said second DC voltage between a first power supply line ( 103 ) and a second power supply line ( 102 ); a chargeable and dischargeable electric charge storage unit ( 120 ) connected between said first power supply line and said second power supply line; a motor drive control unit ( 131 , 132 ) receiving said second DC voltage between said first power supply line and said second power supply line and converting, according to a driving force command vaiue (Tref), said second DC voltage into electric power for driving and controlling said motor; and a control unit ( 140 ) adjusting, when said motor operates in a power running mode, said driving force command value to allow the sum of electric power (Pm) consumed by said motor according to said driving force command value and an amount of change (Pc) in stored electric power of said electric charge storage unit, said change being caused as said second DC voltage changes, to be smaller than a limiting value (Pcvlm) of electric power output from said converter.