Abstract: The present invention relates to an AFPM coreless multi-generator and motor. The present invention is characterized in that the stator includes coils arranged between upper and lower jig plates made of a non-magnetic material, cooling insulating oil is filled in a space where the coils are mounted between the upper and lower jig plates and is sealed by both lateral plates, and one of the both lateral plates is fixedly coupled to the housing of the generator so as to allow the housing to perform thermal conduction. Also, the rotor includes magnets arranged on a rotor disc in a circular arc shape and a yoke element formed integrally with the rotor disc near a central portion thereof in such a fashion as to vertically protrude by a predetermined height. The rotor disc is fixedly mounted to the rotary shaft, and the yoke element is engaged with a yoke element of another rotor correspondingly adjacent to the rotor so as to allow the engaged yoke elements to serve as a passageway of a magnetic field.

Abstract: The present invention relates to a sound wave resonance generator that is placed on underground railways of subways, in tunnels of surface streets, and around a landing field of the airplane of an airport, from which big noises are generated, thereby collecting surrounding noises around there, converting the collected noises into vibration motions of resonators, converting the vibration motions of the resonators into an electrical energy, and making the use of the electrical energy as a power source for driving a load.

Abstract: The present invention relates to an AFPM coreless multi-generator and motor. The present invention is characterized in that the stator includes coils arranged between upper and lower jig plates made of a non-magnetic material, cooling insulating oil is filled in a space where the coils are mounted between the upper and lower jig plates and is sealed by both lateral plates, and one of the both lateral plates is fixedly coupled to the housing of the generator so as to allow the housing to perform thermal conduction. Also, the rotor includes magnets arranged on a rotor disc in a circular arc shape and a yoke element formed integrally with the rotor disc near a central portion thereof in such a fashion as to vertically protrude by a predetermined height. The rotor disc is fixedly mounted to the rotary shaft, and the yoke element is engaged with a yoke element of another rotor correspondingly adjacent to the rotor so as to allow the engaged yoke elements to serve as a passageway of a magnetic field.