Control apparatus for electric vehicles
AssigneeDenso Corporation
InventorsTsuneyuki Egami, Keiichi Kawakami, Takashi Ogawa
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Abstract
In an electric vehicle having a plurality of MG units each including an AC motor and an inverter, a control apparatus executes system voltage stabilization control to suppress variations in a system voltage by adjusting an input power of a first MG unit or a second MG unit so as to reduce the difference between a target value and detected value of the system voltage. In execution of this control, either one or both of the MG units is selected by a selector by using information on the first MG unit and the second MG unit. The system voltage stabilization control is executed on the selected MG unit. Alternatively, the control apparatus may execute the system voltage stabilization control by selecting a voltage boosting converter.
Claims28
A control apparatus for an electric vehicle comprising:
- a voltage conversion means for converting a voltage generated by a DC power supply into a system voltage appearing on a power supply line;
- a plurality of MG units as motor driving units, each including an inverter connected to the power supply line and an AC motor driven by the inverter;
- an MG-unit select means for selecting at least one of the MG units in accordance with operating state of the electric vehicle;
- and
- a system voltage control means for executing system voltage stabilization control to suppress variations in the system voltage by controlling input powers of the least one selected MG unit.
A method of controlling an electric vehicle, the method comprising:
- converting a voltage generated by a DC power supply into a system voltage appearing on a power supply line;
- selecting at least one of a plurality of MG units as motor driving units in accordance with an operating state of the electric vehicle, each of the MG units including an inverter connected to the power supply line and an AC motor driven by the inverter;
- and
- executing system voltage stabilization control to suppress variations in the system voltage by controlling input power of the at least one selected MG unit.
Dependencies are inferred from the claim text.