1PCS Industrial Yaskawa 3000RMP AC SERVO MOTOR SGMG-12AHBAS NEW ORIGINAL SGMG12

Principle: This type of motor is based on Coulomb forces, and its energy output is related to the change in electrostatic energy that occurs when charges are moved between the terminals of a high-voltage (HV) supply. This is different from a regular motor, which is based on magnetic forces and the change of magnetic-dipole energy in a magnetic field.

Discussion: Electrostatic motors are quite limited in how much total power they can provide. Since they can be made very small, they have niche applications in MEMS devices where regular motors with coils would be too large, and where specific power (power per volume) is more important than the power itself.

Scanning Electron Micrograph (SEM) image of a salient-pole electrostatically actuated micromotor made from polycrystalline silicon using surface micromachining techniques. The central rotating element of the motor (e.g., the rotor) is the circular structure in the middle (shown in blue) held to the substrate by the central bearing (which is shown in red). Properly phased voltage potentials are placed on the motor stators (typically 120 degrees advanced in phase sequentially around the stators), which are equally spaced around the perimeter of the rotor (also shown in blue) and these applied voltages on the stators cause the central rotor to turn around the bearing at extremely high angular velocities. This device was made through the MEMS and Nanotechnology Exchange fabrication network.