US 5,629,603 A · Electric system of electric vehicle

Abstract

An electric system of an electric vehicle, in which an AC voltage is applied from an external AC power source to the inverter via windings of an AC motor during the charging operation of a main secondary battery. The inverter has a regenerative function enabling reverse conversion, and the motor windings operate as reactors. A contactor whose first terminals are connected to terminals of the windings and whose second terminals are shortcircuited is provided. The first terminals of the contactor are connected via connecting lines to a charging connector which is to be connected to the external power source. A portion of the vehicle body is connected to the charging connector via a ground line, and is grounded. The contactor is opened when the main secondary battery is charged, and is closed when the electric vehicle is driven.

Claims20

Dependent claims

An electric system of an electric vehicle comprising:

a main secondary battery;
a power converter converting DC power of the main secondary battery into AC power, the power converter having a regenerative function enabling AC to DC conversion;
an AC motor driving wheels of the electric vehicle, the AC motor including windings whose first terminals are connected to the AC side output of the power converter;
a switch including a plurality of switching circuits, first terminals of the switching circuits being each connected to second terminals of the windings, second terminals of the switching circuits being shortcircuited;
and
a charging connector to be connected to an external AC power source while charging the main secondary battery, the charging connector being connected to the first terminals of the switching circuits of the switch.

3 more elements

Dependencies are inferred from the claim text.

Electric system of electric vehicle

Life of this patent

Electric system of electric vehicle

Life of this patent

Abstract

Claims20