Patent ID: 8593020

Claim:
An electric vehicle comprising: a body; a plurality of wheels provided at the body; an electromotor to drive at least one wheel, the electromotor including, a frame, a stator disposed in the frame, a rotor disposed to be rotatable with respect to the stator, and an engaging portion that restricts the stator from moving with respect to the frame in a circumferential direction, the engaging portion including at least one rib protruding from one of surfaces of the frame and the stator, and at least one rib accommodation portion formed at an other opposing surface of the surfaces of the frame and the stator, wherein the at least one rib and the at least one accommodation portion are engaged to allow heat to be transferred therebetween, wherein the frame has a length longer than the stator in an axial direction, wherein the frame has one of the at least one rib and the at least one rib accommodation portion, which has the same length as the length of the frame, and wherein at least one cooling path is formed at the frame; a battery provided in the body; and an inverter coupled between the battery and the electromotor, the inverter including a plurality of elements to convert direct current (DC) power to alternating current (AC) power.