61results about How to "Efficient energy storage" patented technology

An elevator system uses a supercapacitor to store electric energy. Furthermore, the supercapacitor can be used as a source of reserve power in emergency situations, such as power failures. The supercapacitor is connected together with three switching branches to a rectified signal of the power supply of the motor. By closing and opening the switches, the supercapacitor can be charged when the motor load is small. When the motor load is large or when the power supply fails, the electric energy contained in the supercapacitor can be discharged for use by the motor. In an emergency, the motor drives the elevator at a speed lower than normal, and therefore a supply voltage lower than normal is sufficient. Also, energy obtained from braking of the elevator can be stored in the supercapacitor, which has a storage capacity of considerable magnitude as compared to an ordinary capacitor. By applying the invention, the energy consumption of the elevator can be reduced because the waste energy obtained from the power supply can be stored and utilized when more energy is needed.

Deterioration of a power storage device is reduced. Switches that control the connections of a plurality of power storage devices separately are provided. The switches are controlled with a plurality of control signals, so as to switch between charge and discharge of each of the power storage devices or between serial connection and parallel connection of the plurality of power storage devices. Further, a semiconductor circuit having a function of carrying out arithmetic is provided for the power storage devices, so that a control system of the power storage devices or a power storage system is constructed.

Cryogenic energy storage systems, and particularly methods for capturing cold energy and re-using that captured cold energy, are disclosed. The systems allow cold thermal energy from the power recovery process of a cryogenic energy storage system to be captured effectively, to be stored, and to be effectively utilized. The captured cold energy could be reused in any co-located process, for example to enhance the efficiency of production of the cryogen, to enhance the efficiency of production of liquid natural gas, and / or to provide refrigeration. The systems are such that the cold energy can be stored at very low pressures, cold energy can be recovered from various components of the system, and / or cold energy can be stored in more than one thermal store.

The invention discloses a permanent magnet operating mechanism used for driving mechanisms of circuit breakers, load switches and other equipment, which comprises a transmission rod, on which an armature is fixed, and opening coils are respectively arranged around the armature (sometimes it can be omitted). ), permanent magnets, pole shoes, closing coils and static iron cores. The upper and lower ends of the transmission rod pass through the upper and lower bushings. The upper and lower bushings are correspondingly inlaid on an upper end cover and a lower end cover. There is an auxiliary gasket on the lower end cover. The upper end cover is a pot-shaped structure, and the oblique angle inside the pot is the same as the corresponding taper angle of the armature. It is also possible to make the static iron core, the upper and lower end covers with pots, pole shoes, etc. into a whole. The invention adopts the design principles of electromagnetic operation and permanent magnet retention, and has simple mechanism, few moving parts and low failure rate. In particular, the pot-type end cover and tapered armature are used to improve the suction characteristics of the mechanism. It can be widely used in the field of medium and low voltage switches, and its production does not require very complicated processes and special materials, and can be easily mass-produced.