Abstract: A vehicle body structure for an electric vehicle includes: a battery disposed at a center lower portion of a vehicle body; a side sill being hollow and extending in a vehicle body front-rear direction outside in a vehicle width direction of the battery; a bridge beam member being hollow, disposed below the side sill and outside in the vehicle width direction of the battery, extending in the vehicle body front-rear direction, and having a cross section perpendicular to the vehicle body front-rear direction formed as a closed cross section; and at least one bridge pier member made of steel, extending in the vehicle width direction from the battery toward the bridge beam member, and having a cross section perpendicular to the vehicle width direction forming at least a part of a closed cross-sectional shape.

Abstract: A vehicle body structure includes: a battery disposed at a vehicle body central lower portion, i.e., at a central lower portion of the vehicle body; a side sill of a hollow shape, the side sill disposed at an outer side of the battery in a vehicle width direction and extending in a vehicle longitudinal direction; a reinforcement member disposed inside the side sill, having a closed cross section of a polygonal shape, and having a continuous cylindrical structure where a plurality of the closed cross sections are continuous when viewed in the vehicle width direction; and a deformation control member attached to the reinforcement member and configured to control a deformation of the continuous cylindrical structure of the reinforcement member in the vehicle longitudinal direction.

Abstract: A ten-phase and twenty-main pole hybrid stepping motor is driven by a five-phase driving pulse. The rotor has N and S pole tooth gears at ends of a rotor shaft. The stator has a cylindrical hollow body. Nos. 1-20 main poles extend from an inner wall of the hollow body toward the rotor shaft in a plane perpendicular to the rotor shaft so that the twenty main poles surround the N and S pole teeth in the plane perpendicular to the rotor shaft. Each main pole has a free end at which two stator teeth are formed. The stator teeth face the teeth of N and S pole teeth gears. A coil is wound around each main pole for excitation of the main pole. Nos. 1-10 main poles and Nos. 11-20 main poles face each other in the radial direction of the rotor respectively. An arbitrary main pole and a fifth next main pole always have a 90-degree relation. Positions of the teeth on Nos. 1-10 and Nos. 11-20 main poles are respectively determined by an expression with non-overlapping m being substituted:Pt.times.k+m.times..theta.