Buck-boost converter control device, hybrid vehicle equipped with the same, and buck-boost converter control method

摘要

PPROBLEM TO BE SOLVED: To avoid the number of revolutions of an electric motor from reaching a band of the number of revolutions corresponding to a resonance frequency of a circuit in a state that a voltage of a high-voltage system is high, and to cope with the delays in detection, communication and control. PSOLUTION: When an acceleration opening Acc is smaller than a threshold Aref, the control device of a step-up/step-down converter uses a normal map for setting a voltage which is increased linearly up an input maximum voltage Vset of an inverter from a voltage V1 as a limit voltage Vlim, in a process where the number of revolutions Nm2 of the motor reaches the number of revolutions N2 from the number of revolutions N1, which is larger than a resonance frequency band; and when the acceleration opening Acc is equal to or larger than the threshold Aref, the control device uses an acceleration map for setting the voltage which is increased linearly up to the input maximum voltage Vset from the voltage V1 as the limit voltage Vlim in a process where the number of revolutions Nm2 of the motor reaches the number of revolutions N4, which is slightly smaller than the number of revolutions N2 from the number of revolutions N3, which is slightly smaller than the number of revolutions N1. PCOPYRIGHT: (C)2011,JPO&INPIT