Abstract: Disclosed is a rotor for a spoke motor, in which both rare-earth magnets and ferrite magnets are arranged in series, the rare-earth magnet has a smaller size than the ferrite magnet, and a small amount of rare-earth magnet is used, such that manufacturing costs may be greatly reduced, an efficient output may be produced, the motor may produce a higher output than a spoke motor model using only the ferrite magnet, and the motor may use a smaller amount of rare-earth magnet than an IPM type motor model, but may produce an output at a similar level to that of the IPM type motor model.

Abstract: Disclosed is a rotor for a motor for reducing the amount of usage of permanent magnets, in which a rotor structure in which multiple multilayered permanent magnets are embedded has a vacant space in which no permanent magnet is embedded, such that the amount of usage of the permanent magnets is reduced, and an output, torque, and efficiency of the motor are improved by using the space in which no permanent magnet is embedded. The present invention has an effect in that the amount of usage of the permanent magnets is markedly reduced during a process of manufacturing the motor, such that material costs are reduced, working time required to embed the permanent magnets is reduced, working time is greatly reduced, costs are reduced, the number of working processes is reduced, and assembly workability is improved.

Abstract: An interior permanent magnet motor includes a stator having teeth on which a coil is wound, a rotor rotatably provided inside the stator, the rotor including a plurality of rotor sectors, and at least two permanent magnet recesses formed between the rotor sectors. Ferrite permanent magnets are embedded in predetermined ones of the permanent magnet recesses that are formed in an inner portion of the rotor. Rare-earth permanent magnets are embedded in the other ones of the permanent magnet recesses that are formed in an outer portion of the rotor.

Abstract: An interior permanent magnet motor includes a stator having teeth on which a coil is wound, a rotor rotatably provided inside the stator, the rotor including a plurality of rotor sectors, and at least two permanent magnet recesses formed between the rotor sectors. Ferrite permanent magnets are embedded in predetermined ones of the permanent magnet recesses that are formed in an inner portion of the rotor. Rare-earth permanent magnets are embedded in the other ones of the permanent magnet recesses that are formed in an outer portion of the rotor.

Abstract: The present invention relates to an electrode for a rechargeable lithium battery comprising an emulsion binder, and a lithium secondary battery including the same. The electrode comprises a current collector coated with an active material layer including active material powders and a cellulose-based polymer binder having an esterification degree greater than or equal to 1.3 and a weight average molecular weight greater than or equal to 100,000. Batteries including electrodes with an active material that includes such a cellulose-based polymer exhibit improved energy density and high reversible capacity.

Abstract: The present invention relates to an electrode for a rechargeable lithium battery comprising an emulsion binder, and a lithium secondary battery including the same. The electrode comprises a current collector coated with an active material layer including active material powders and a cellulose-based polymer binder having an esterification degree greater than or equal to 1.3 and a weight average molecular weight greater than or equal to 100,000. Batteries including electrodes with an active material that includes such a cellulose-based polymer exhibit improved energy density and high reversible capacity.