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Development of solenoid-type vibrators used for mobile phones

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5 Author(s)
Sang-Moon Hwang ; Sch. of Mech. Eng., Pusan Nat. Univ., South Korea ; Hong-Joo Lee ; Shi-Uk Chung ; Gun-Yong Hwang
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With the advent of the telecommunication era, a mobile phone becomes a necessary communication device in modern society. For silent tactile signal, vibration motors have become one of the generic components in most mobile phones. Conventional vibration motors employ three-phase windings with mechanical brushes for commutation. However, mechanical commutation in these prior arts greatly deteriorates its life span, reliability, and productivity due to structural intricacy. This paper introduces a novel design of solenoid-type vibrators using electromagnetic and mechanical analysis. The proposed vibrators have a simpler structure and longer life span by eliminating wear-prone commutation parts in vibration motors.

Published in:

IEEE Transactions on Magnetics  (Volume:39 ,  Issue: 5 )