Evaluation of an Electrostatic Film Motor Driven by Two-Four-Phase AC Voltage and Electrostatic Induction

Abstract

This paper describes a voltage-induction type electrostatic film motor that operates by feeding electric power to the slider by electrostatic induction. In electrostatic film motors, feeding power to slider is important for better output capability and positioning performance. However, the power feeding using electric cables sometimes cause mechanical disturbance to the motor motions. In the new electrostatic motor, the power to the slider is fed by electrostatic induction, thus removing electric cables that can cause mechanical disturbances. The proposed motor has a two-phase electrode in the slider and a four-phase electrode in the stator. In addition, both stator and slider have the induction electrodes so that electric power is transferred to the slider through the induction electrodes. The paper first analyzes the thrust force characteristics of the proposed drivingelectrode configuration, and then analyzes the characteristics of voltage induction, both based on capacitance-network analysis. The analyzed result is verified by experiments that showed good agreements with the provided analysis.

Challenges in developing a magnetic resonance–compatible haptic hand-controller for neurosurgical training

“…62 A 2-DOF force sensor was developed using MR-compatible materials and optical fibers to quantify interaction force between the end-effector of HHC and the task. 58 Hall effect-based sensors. The sensors based on Hall effect have been employed to quantify the relationship between the electrical current and the torque of a Lorentz actuator, which generates repulsive levitation and propulsion forces using only one permanent magnet, by measuring the amount of local magnetic flux density.…”

“…Electrostatic force has also been used to drive MR-compatible devices. 58 An electrostatic motor is a type of electric motor that operates based on the attraction and repulsion of electric charges. Although these actuators are not inherently MR-compatible, they have recently been used to prototype non-magnetic haptic devices.…”

“…52 In a voltage-induced electrostatic actuator that has also been fabricated, the power to the slider is fed by electrostatic induction; thus, the electric cables are not required; therefore, mechanical disturbances are reduced. 58 In general, electrostatic actuators need a high voltage source to be able to generate a force in the range usable for haptics (e.g. 5 N ).…”

“…Several haptic/robotic devices with different actuation systems, sensors, using different materials suitable for MR environment, have been developed. The actuators include electromagnetic, 46,47 hydraulic, 48 pneumatic, [49][50][51][52] piezoelectric, [53][54][55] ultrasonic, [56][57][58] electrorheological fluid (ERF)-based 59 actuation systems. These sensors are based on various principles, including optical [60][61][62] and Hall effects, 46 potentiometers, 63,64 load cells, 62 pneumatic transmissions, 65 fiberoptic, 66,67 and piezoelectric devices.…”

Novel multilayer differential linear electrostatic motor

“…The most common configurations are film motors [7][8][9][10], micromotors [11][12][13], linear inchworm motors [14][15], comb motors [16][17][18] and wobble motors [19][20]. These topologies are well known in the literature and their disadvantage is rather complex structure and sophisticated control.…”