| 摘要 |
A lower limit value setting unit (52) variably sets a lower limit value (Vth) of a target voltage (Vh*) in a voltage range which is higher than a maximum value in voltages (Vb1, Vb2) of an accumulation device and is not affected by a dead time arranged in a converter according to temperatures(Tb1, Tb2) and required powers (Pb1* Pb2*). A maximum value selection unit (53) sets as the target voltage, the maximum value among voltages (Vb1, Vb2) of the accumulation device and required voltages (Vm1*, Vm2*) of a motor generator. A target voltage limit unit (54) compares the target voltage to the lower limit value (Vth). If the target value is lower than the lower limit value (Vth), the target voltage control unit (43) sets the lower limit value (Vth) to be the target voltage (Vh*). |
