Patent ID: 8662266

Claim:
An electromotive active vibration absorber apparatus mounted to a vehicle to attenuate vibration of the vehicle, the electromotive active vibration absorber apparatus comprising: elastic members mounted to an housing; an inner yoke having an upper yoke part and a lower yoke part which are fastened to the elastic members respectively, wherein an inner magnetic substance is disposed between the upper and lower yoke parts; and an outer yoke enclosing the inner yoke and having top and bottom portions dented to form inner and outer support members and a connector spoke and receive coil units therein; wherein the coil units include an upper coil unit and a lower coil unit, the upper coil unit being mounted above the connector spoke and the lower coil unit being mounted under the connector spoke respectively, between the inner and outer support members of the outer yoke; wherein the coil units are controlled to vibrate the inner yoke when power is applied thereto; and wherein a fitting groove is formed on the outer circumference of the outer support member and an outer magnetic substance is mounted in the fitting groove such that the inner magnetic substance, the coil units and the outer magnetic substance are disposed in series in a radial direction of the vibration absorber apparatus.