Electrically powered vehicle mounting electric motor and control method therefor

An electrically powered vehicle, comprising:

• an electric motor;
• an electric power converter controlling driving of said electric motor by power conversion through on/off control of a power semiconductor device;
• a first detector detecting an operation on an accelerator pedal of the vehicle;
• a second detector detecting an operation on a brake pedal of the vehicle;
• and
• a controller controlling operations of said electric motor and said electric power converter, wherein
• said controller detects a stall state in which said accelerator pedal and said brake pedal are both operated, based on outputs from said first and second detectors, and when said stall state is detected, sets switching frequency of said power semiconductor device lower than when said stall state is not detected.

A method of controlling an electrically powered vehicle including an electric motor and an electric power converter controlling driving of said electric motor by power conversion through on/off control of a power semiconductor device, comprising:

• the first step of detecting operations on an accelerator pedal and a brake pedal of the vehicle;
• the second step of detecting, based on detection at said first step, a stall state in which said accelerator pedal and said brake pedal are both operated;
• and
• the third step of setting, when said stall state is detected at said second step, switching frequency of said power semiconductor device lower than when said stall state is not detected.