An apparatus for operating simultaneously as DC (Direct Current) motor and DC generator is disclosed. Four permanent magnets (101, 102, 103, 104) are placed to be able to rotate with a shaft and two coils (201, 202) are placed outside the circumference of the permanent magnets and one secondary cell battery (301) is used to supply electric current to the coils. One device (501) for making electric current flow alternately in the coils is placed. If electric current flows in a first coil (201) by the secondary cell battery, the shaft rotates and the rotating permanent magnets generate electric power in a second coil (202). Electric current flows from the second coil to the first coil. Electric current always flows in one direction in the coils as the shaft rotates in one direction.

An apparatus for operating simultaneously as DC (Direct Current) motor and DC generator is disclosed. Four permanent magnets (101, 102, 103, 104) are placed to be able to rotate with a shaft and two coils (201, 202) are placed outside the circumference of the permanent magnets and one secondary cell battery (301) is used to supply electric current to the coils. One device (501) for making electric current flow alternately in the coils is placed. If electric current flows in a first coil (201) by the secondary cell battery, the shaft rotates and the rotating permanent magnets generate electric power in a second coil (202). Electric current flows from the second coil to the first coil. Electric current always flows in one direction in the coils as the shaft rotates in one direction.

A method of on-demand energy delivery to an active suspension system comprising an actuator body, hydraulic pump, electric motor, plurality of sensors, energy storage facility, and controller is provided. The method comprises disposing an active suspension system in a vehicle between a wheel mount and a vehicle body, detecting a wheel event requiring control of the active suspension; and sourcing energy from the energy storage facility and delivering it to the electric motor in response to the wheel event.

A method of on-demand energy delivery to an active suspension system comprising an actuator body, hydraulic pump, electric motor, plurality of sensors, energy storage facility, and controller is provided. The method comprises disposing an active suspension system in a vehicle between a wheel mount and a vehicle body, detecting a wheel event requiring control of the active suspension; and sourcing energy from the energy storage facility and delivering it to the electric motor in response to the wheel event.