Abstract: In a reverse-charge prevention apparatus (24) including a 1st breaker (25) for connecting or disconnecting an electric power system (A) to or from a distributed electric power apparatus (11), in which the 1st breaker (25) is switched off when the distributed electric power apparatus (11) is disconnected from the electric power system (A) by switching off a 2nd breaker (F) disposed in the electric power system (A) so that reverse-charge from the distributed electric power apparatus (11) to the electric power system (A) is prevented, the reverse-charge prevention apparatus (24) further includes a disturbance generator (20) for slightly varying electric power outputted by the distributed electric power apparatus (11) regularly with a given period; a variable period extraction circuit and a filter (26, 27) for extracting a variable period same in period to the given period, the variable period existing in a period of an alternating-current voltage outputted by the distributed electric power apparatus (11); and a

Abstract: A power storing apparatus utilizes rotating flywheels. The casing of each flywheel is supported on the ground by an elastic member without fear of being rocked due to the rotation of a rotor. At least one pair of rotors, the rotors of which rotate in opposite directions to each other while producing the same rotation torque, is rotatably supported by a support supported on the ground through a suspending device which is capable of absorbing the vibration of an earthquake. Each rotor includes flywheels for maintaining the rotation of the corresponding rotor by an inertia force.

Abstract: An electric vehicle in which each of the driving wheels is adapted to be driven and regeneratively braked by its individual and independently controlled driving motor, and the driving motors are independently controlled in response to sensors detecting the travel of the vehicle including wheel rotation sensors, steering angle sensors, and acceleration and braking sensors.

Abstract: The present invention relates to an improvement of the driving characteristics of an electric vehicle in which each of the driving wheels is adapted to be driven by its individual driving motor, and more particularly, firstly to an improvement of the driving characteristics of the electric vehicle without complication of the mechanical structure thereof and secondly to an improvement of the motion characteristics of the electric vehicle by simplifying the structure of steering wheel also having a function of driving wheel and by increasing the degree of freedom of the swiveling action of the steering wheel.In order to achieve these objects, according to the present invention, each of the driving wheels arranged at both sides of the electric vehicle is provided with an independently controlled driving motor and such a structure is applied also to the steering wheels.