Optimization Shape of Variable Capacitance Micromotor Using Differential Evolution Algorithm

Table 5

DE Results of “torque and ripple optimization” for VCM geometric parameters.

Parameter	DE	GA
Stator pole width 𝜑𝑠	27.9317°	24.0924
Rotor pole width 𝜑𝑟	23.9762°	27.6354
Rotor inner radius 𝑅𝑖𝑟	23.1135 μm	37.1227
Ripple factor R.F0	0.0061	0.0111
Torque 𝑇rms	5.801 pN⋅m	5.6455 pN⋅m
Objective function 𝑓(𝑥)	2.1087	2.29
Population size 𝑁𝑝	30	80
Number of iteration 𝐺	50	100
Run time	30 hours	160 hours