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Electrical-Mechanical Transduction. For the generalized capacitor (potential energy): For a linear...
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Electrical-Mechanical Transduction
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Transcript of Electrical-Mechanical Transduction. For the generalized capacitor (potential energy): For a linear...
• For the generalized capacitor (potential energy):
•For a linear electrical capacitor:
ε – permitivityA – areaG – Gap
Comb Drive – Another version of the electrostatic actuator.•What is different?
•Before, C=A/g•Now, C=C0+C1x•Linear in x, the direction of motion.•Consequences?
•The Force is constant.
• Look at one finger, treat capacitance as that of a parallel plate capacitor: • Then C=A/g.• A=lt.• C=lt/g, but remember that g is a constant.• So, C=lt/g=C1l (or =C1x)