Abstract
The spring structure design and magnetic circuit optimization were considered to design a novel linear vibration motor with advantages of lower cost and similar motor performance compared to a coin-type vibration motor. A vibration motor is inserted in an electronic cigarette to provide haptic feedback to remind the user that the electronic cigarette is ready to operate. For the new generation of electronic cigarettes, new vibration motors require smaller size, lower cost, and acceptable motor performance. A three-dimensional finite element method has been used to find the coil’s magnetic flux density and von Mises stress distribution in the spring. Moreover, the electromagnetic-mechanical coupling method has been employed to find the motor acceleration on a dummy jig. The acceleration of the vibration motor was obtained to verify the analysis results by experiment. The experiment results verified the analysis results of the linear vibration motor. Compared to a coin-type vibration motor, the novel linear vibration motor has 9.09% and 80.77% reductions in total thickness and manufacturing cost, and a 40.0% improvement in acceleration.
Highlights
Compared to traditional cigarettes, more and more electronic cigarettes (E-cigarettes) [1] are widely used, which can be useful to quit smoking
A coin-type vibration motor creates a large acceleration in the form of eccentric vibration, but it has a short product life due to wear of the bushing and bearing
A horizontal linear vibrating actuator was designed by Lee et al to reduce the thickness of a smartphone and provide better haptic performance compared to a vertical linear vibration actuator
Summary
More and more electronic cigarettes (E-cigarettes) [1] are widely used, which can be useful to quit smoking. The electrical material properties are introduced obtain the resonance frequency and von Mises stress distribution on the spring, respectively They to obtain the average flux density on the voice coil considering nonlinear B-H behavior of the yoke were used to do an electromagnetic-mechanical coupling analysis. A coin-type vibration sample, a linear vibration motor prototype, and experiment setups analysis to obtain the resonance frequency and von Mises stress distribution on the spring, respectively. Based on the analysis two novel types of linear motorshave were manufactured checkthe the acceleration on a dummy methods, novel linear vibration vibration motors been developed toto reduce resonance frequency and improve the magnetic force by considering a novel spring structure and magnetic circuit optimization. Linear vibration motor has a 9.09% reduction in total thickness, an 80.77% reduction in manufacturing cost, and a 40.0% improvement in acceleration at 250 Hz
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