Abstract: An electric vehicle supply equipment (EVSE) charging system includes an EVSE charging station that is configured to switch a power source between a first power source and a second power source based on a time of use or real-time energy pricing data from a utility. Switching additionally and/or optionally may be based on at least one of charging information and metering information. The first power source may be a renewable source and the second source may be the power grid. In this way, a smart electric vehicle supply equipment (EVSE) charging station may manage and optimize energy supply from a grid and a renewable source when charging an electric vehicle (EV) with the smart the EVSE charging station.

Abstract: A power switching device includes a power terminal connected to a power supply; a load terminal connected to a load; a power switch connected between said power terminal and said load terminal and arranged to be conductive in a first operating state; a power conductor connected between said power terminal and said load terminal in at least one state, wherein an electrical current through said power conductor changes in response to said power switch being turned off, thereby causing self-induction in said power conductor; and a control unit arranged to control said power switch in real-time on the basis of a real-time level of said voltage across said power conductor so as to turn off said power switch in a continuous or stepwise or pulsed manner to prevent a voltage across said power conductor from exceeding a maximum allowed level.

Abstract: The present invention relates to a system for controlling rotational speed on a rotating process machine, which for example is a turbine or a propeller, where the rotating process machine is connected to at least one motor and arranged to rotate with a given rotational speed given by the motor, the motor is connected to a control system and the rotational speed of the motor is arranged to be controlled by a control system. The rotating process machine comprises a load control arranged to be adaptable, the control system is connected to the rotating process machine. With the invention, one achieves soft transitions between several selectable rotational speeds and lower energy consumption by step by step adjusting the size and the rotational speed of the motor to varying energy requirement.

Abstract: The invention is a starting and generating apparatus for an engine, including: a rotator configured to be used as a generator driven by an engine as well as used as a starter motor for starting the engine; a power transmission mechanism configured to connect the engine with the rotator; a starter drive unit configured to supply an electricity to the rotator to drive the rotator as the starter motor when the engine is to be started; a clutch mechanism configured to shut off a power transmission from the engine to the power transmission mechanism when the engine is to be started; and a clutch control unit configured to bring the clutch mechanism into a connected state when a rotational speed of the rotator has reached a given rotational speed at which the engine can be started.

Abstract: The invention is a starting and generating apparatus for an engine, including: a rotator configured to be used as a generator driven by an engine as well as used as a starter motor for starting the engine; a power transmission mechanism configured to connect the engine with the rotator; a starter drive unit configured to supply an electricity to the rotator to drive the rotator as the starter motor when the engine is to be started; a clutch mechanism configured to shut off a power transmission from the engine to the power transmission mechanism when the engine is to be started; and a clutch control unit configured to bring the clutch mechanism into a connected state when a rotational speed of the rotator has reached a given rotational speed at which the engine can be started.

Abstract: A drive system, includes a motor having a neutral terminal, a converter, which has a voltage intermediate circuit and is electrically connected to the motor, a switching device, and a holding brake, which is mechanically connected to the motor. The holding brake has a first terminal, which is connected to the neutral terminal of the motor, and a second terminal, which is connected with a negative busbar of the voltage intermediate circuit via the switching device.

Abstract: The present invention is a power supply (10) that starts a load (20) with a heavy start-up power draw from a power grid (12) and then switches the load to a generator (22) for lower power draw operation thereby avoiding the need for a large capacity generator capable of initial start-up of the load (20). The power supply comprises a conductor (15) for connecting to a power grid, an electrical power generation device (30), an electrical power using device or load (20) and a switching mechanism (40) for 1) isolating the power grid (12) from the power generation device (30), 2) connecting the power grid conductor (15) to the electrical power using device (20) for the initial start-up of the power using device (20), and 3) connecting the power generation device (30) to the power using device (20) after initial start-up.

Abstract: An elevator energy conservation system is disclosed comprising an elevator motor driven by generator having two power supplies. A primary power supply provides electricity to the generator when the elevator motor is in use, while a smaller power supply using significantly less electricity powers the generator while it is idling. The two power supply system has been shown to cut the electricity usage for standard elevators by fifty percent or more over extended periods of use. Moreover, the present invention in a preferred embodiment discloses a shaft which extends from the generator which can be used to power other local machines such as air conditioners, blowers, heaters, and DC motors.

Abstract: In order to control fans, which are arranged for example in power supplies for cooling the components arranged there, a method and a circuit arrangement are proposed which, on the basis of control pulses which are derived from the input current of the fan, effect the control in such a way that the control pulses are re-shaped into monostable pulses and are fed, via an asymmetrical resistance circuit for charging and discharging, to a storage component whose charge state is a measure for the control of the fan.

Abstract: A method and apparatus of adding a DC drive motor to an existing Ward-Leonard motor-generator motion drive for a material handling device which utilizes static power conversion to supply the armature current of the added DC drive motor. Existing drive motors receive their power from corresponding generators which are shaft driven by an AC motor. The added DC motor obtains its power through a transformer which reduces AC line voltage down to the proper level and which is then converted to a variable voltage reversible DC armature supply by a power conversion module. The speed of the existing motors and the added motor is synchronously controlled from an operator's master switch.

Abstract: A fluid-powered auxiliary starting system for electric motors is disclosed which includes an accumulator means for supplying an amount of fluid at high pressure to a fluid-operated motor and a clutch of similar device for connecting the output shaft of the fluid-operated motor to transfer rotational torque to the shaft of the prime mover motor to be started. The system may be either hydraulic or pneumatic and may be used to bring one or more electric motors substantially up to spaced before electric power is applied to the motors themselves. The same motor or a hydraulic or pneumatic pump may be used to recharge the accumulator between uses for electric motor starting.

Abstract: A speed control system for an induction motor controlled by a converting arrangement coupled with a commutatorless motor which operates without commutation failure notwithstanding wide variations in the speed of the commutatorless motor. The speed control system includes an arrangement for maintaining the value of a direct current signal of the converting arrangement less than the maximum current value for ensuring proper operation of the converting arrangement.