Camera Module VCM Linear Motor & Closed-Loop Servo Handbook
Comprehensive engineering handbook on micro Voice Coil Motors (VCM) in smartphone camera modules. Demystifying rotary-to-linear conversion vs electromagnetic direct-drive, 2nd-order dynamic equilibrium, Ampere thrust constant BL vs stiffness tradeoffs, BeCu springs and viscoelastic damping glue shear dissipation, Bode plot three-zone control, GM/PM closed-loop stability margins, overdrive/active braking, input shaping feedforward vibration cancellation, and bi-directional VCM.
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