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Varying capacitance using electromechanics
Posted Apr 14, 2016, 9:59 a.m. EDT Mesh, Modeling Tools & Definitions, Parameters, Variables, & Functions, Studies & Solvers, Structural Mechanics Version 5.0 2 Replies
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Dear Comsol User,
I am trying to find variation in capacitance between two plates with applied body load. I defined an air box around the plates. Now I'm trying with electromechanics physics for applying body load and finding capacitance. I defined the two plates as linear elastic material. Applied body load to the moving plate. I applied 1V to moving plate and fixed plate is grounded. I also gave parametric sweep for body load. But capacitance is not varying with body load.
What changes should I make to get a varying capacitance? Please Help.
Thank You,
Aswathi M Madhu
I am trying to find variation in capacitance between two plates with applied body load. I defined an air box around the plates. Now I'm trying with electromechanics physics for applying body load and finding capacitance. I defined the two plates as linear elastic material. Applied body load to the moving plate. I applied 1V to moving plate and fixed plate is grounded. I also gave parametric sweep for body load. But capacitance is not varying with body load.
What changes should I make to get a varying capacitance? Please Help.
Thank You,
Aswathi M Madhu
2 Replies Last Post Apr 17, 2016, 11:07 p.m. EDT
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Posted:
9 years ago
Hello Aswathi,
This model illustrates the approach to follow to model such a system and create the desired capacitance vs load graph:
www.comsol.com/model/capacitive-pressure-sensor-476
Best regards,
Jeff
This model illustrates the approach to follow to model such a system and create the desired capacitance vs load graph:
www.comsol.com/model/capacitive-pressure-sensor-476
Best regards,
Jeff
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Posted:
9 years ago
Hi Jeff,
I want to apply body load in N/m^3(force per unit volume)and see the variation in capacitance. But when I apply load in N/m^3 capacitance is not varying. I also tried applying boundary load in N/m^2(force per unit area) , then i got variation in capacitance with load. So I used boundary load and applied load in N/m^3 multiplied by thickness to get load in N/m^2. But the capacitance remained constant. How can I apply load in N/m^3 and see the variation in capacitance?
Please Help,
Thank You,
Aswathi.
I want to apply body load in N/m^3(force per unit volume)and see the variation in capacitance. But when I apply load in N/m^3 capacitance is not varying. I also tried applying boundary load in N/m^2(force per unit area) , then i got variation in capacitance with load. So I used boundary load and applied load in N/m^3 multiplied by thickness to get load in N/m^2. But the capacitance remained constant. How can I apply load in N/m^3 and see the variation in capacitance?
Please Help,
Thank You,
Aswathi.