High-Voltage Optocoupler Amplifier for Electrostatic Actuators

Abstract:Many electrostatic actuators require multi-kilovolt drive voltages at sub-milliamp currents, a task poorly suited for conventional switching devices. As an alternative, we demonstrate a high-voltage amplifier using optocouplers as active elements. The amplifier produces a 20-kV peak-to-peak output with up to 500 Hz bandwidth while maintaining a minimal component count. By using optocouplers as linear devices in feedback, lower harmonic distortion and higher bandwidth are achieved than offered by equivalent PWM amplifiers. This design improves the viability of electrostatic actuators by providing a simpler method to achieve useful drive waveforms.

Robotics (cs.RO); Systems and Control (eess.SY); Instrumentation and Detectors (physics.ins-det)

arXiv:2609.29914 [cs.RO]

(or arXiv:2609.29914v1 [cs.RO] for this version)

https://doi.org/10.48550/arXiv.2609.29914 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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