ACTIONNEUR ET MICROMOTEUR DE TYPE BDA

• Main Authors: HUANG I-YU, HORNG ALEX, CHEN GUAN MING
• Format: Patent
• Language: French
• Published: 14.11.2008
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICALDEVICES; MICROSTRUCTURAL TECHNOLOGY; NON-POSITIVE DISPLACEMENT PUMPS; PERFORMING OPERATIONS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTUREOR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; TRANSPORTING; WEAPONS

La présente invention propose un micromoteur rotatif BDA innovant avec un mécanisme d'actionnement différent et des performances améliorées. Plusieurs études significatives ont montré que la longueur de la plaque SDA (6) est supérieure à 75 µm et que la longueur de plaque (8) de l'actionneur BDA est inférieure à 75 µm. Les caractéristiques dimensionnelles principales de l'actionneur BDA sont la partie de pied (15) de la plaque BDA (8) avec un rapport hauteur/largeur inférieur à 1 et la longueur de la plaque BDA (8) inférieure à 75 µm. Ainsi, pour la même puissance d'entraînement et la même fréquence qu'un micromoteur de type SDA, le micromoteur BDA présente une rotation « en sens inverse » constante, une vitesse de rotation plus élevée (> 30 tour/min) et une durée de vie plus grande (> 100 heures). Provided is the design and fabrication of the novel bounce drive actuator (BDA) for the development of a new-type micro rotary motor. Although the scratch drive actuator (SDA) micro motor has been developed more than one decade, such device has limited commercial applications due to its shorter lifetime, high power consumption and sudden reverse rotation. In contrast, present invention proposes an innovative BDA micro rotary motor with different actuating mechanism and improved performance. Several significant investigations shown in this research present that the length of the SDA-plate is longer than 75 mum and the plate length of the BDA is less than 75 mum. Under the same driving power and frequency with SDA-based micro motor, the BDA-based micro rotary motor exhibited a consistent "reverse" rotation and a higher speed. BDA has higher flexural rigidity due to its shorter length of plate; thus, the contact area of the bending BDA-plate and the insulator substrate will substantially be reduced even under the same applied voltage as the priming value of SDA-plate. Furthermore, a novel rib and flange structure design for the improvement of lifetime (>100 hrs) and rotational speed (>30 rpm) of BDA micro motor was also demonstrated in this invention.