Power-Efficient Driver Circuit for Piezo Electric Actuator with Passive Charge Recovery

Autor: Norikazu Ohta, Takashi Ozaki
Jazyk: angličtina
Rok vydání: 2020
Předmět:
0209 industrial biotechnology
Control and Optimization
Materials science
driver circuit
charge recovery
piezoelectric actuator
power consumption
Energy Engineering and Power Technology
02 engineering and technology
Power factor
Hardware_PERFORMANCEANDRELIABILITY
Driver circuit
lcsh:Technology
law.invention
Computer Science::Robotics
Condensed Matter::Materials Science
020901 industrial engineering & automation
Parasitic capacitance
law
Hardware_GENERAL
0202 electrical engineering
electronic engineering
information engineering
Hardware_INTEGRATEDCIRCUITS
Quantitative Biology::Populations and Evolution
Electrical and Electronic Engineering
Engineering (miscellaneous)
Electronic circuit
Renewable Energy
Sustainability and the Environment
business.industry
lcsh:T
020208 electrical & electronic engineering
Electrical engineering
Piezoelectricity
Computer Science::Other
visual_art
Electronic component
visual_art.visual_art_medium
Resistor
Actuator
business
Energy (miscellaneous)
Zdroj: Energies; Volume 13; Issue 11; Pages: 2866
Energies, Vol 13, Iss 2866, p 2866 (2020)
ISSN: 1996-1073
DOI: 10.3390/en13112866
Popis: Piezoelectric actuation is a promising principle for insect-scaled robots. A major concern while utilizing a piezoelectric actuator is energy loss due to its parasitic capacitance. In this paper, we propose a new concept to recover the charge stored in the parasitic capacitance; it requires only three additional lightweight passive components: two diodes and a resistor. The advantages of our concept are its small additional mass and simple operating procedure compared with existing charge recovery circuits. We provided a guideline for selecting a resistor using a simplified theoretical model and found that half of the charge can be recovered by employing a resistor that has a resistance sufficiently larger than the forward resistance of the additional diode. In addition, we experimentally demonstrated the concept. With a capacitive load (as a replacement for the piezoelectric actuator), it was successfully observed that the proposed concept decreased the power consumption to 58% of that in a circuit without charge recovery. Considering micro aerial vehicle (MAV) applications, we measured the lift-to-power efficiency of a flapping wing piezoelectric actuator by applying the proposed concept. The lift force was not affected by charge recovery; however, the power consumption was reduced. As a result, the efficiency was improved to 30.0%. We expect that the proposed circuit will contribute to the advancement of energy-saving microrobotics.
Databáze: OpenAIRE
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