Research On Dielectric Elastomer Generator In Alternating Current Mode

The dielectric elastomer generator（DEG）has shown great advantages in converting mechanical energy into electrical energy,due to its high energy density,light weight,soft.At present,there is still disadvtage in DEG research.An external high-voltage power supply is required when it is used to harvest energy.Electricity is used to generate electricity,limiting its application.Therefore,a dielectric elastomer generator is proposed in alternating current（AC）mode in this thesis.When the DEG is working,the external high-voltage power supply is not needed.The energy is collected in AC mode.Its output performance is studied in this thesis.A wave energy generator is designed and manufactured based on dielectric elastomer in AC mode,to collect wave energy.Electrical energy converted from wave energy is used to power temperature wireless sensor.The function of long-distance wireless transporting of temperature data is realized.The main research contents are as follows:1.Dielectric elastomer generator working in AC mode is designed.It comprises of follow parts:an electret electrostatic voltage source（EEVS）,Dielectric elastomer capacitor（DEC）,Self-priming circuit（SPC）,and Zener diode.The initial voltage of DEC and SPC was provided by EEVS.During the stretching-relaxing process of DEC,causing series-parallel switching of SPC,the voltage of the DEC is raised.The voltage of DEC is stabilized at the diode cut-off voltage,due to the reverse cut-off function of the diode.A loading is connected in series between DEC and SPC.Charge circular flows on the loading,which realizes electric energy collected in AC mode.Finally,the extremely output charge density Q_density can rearch 26 m C/m²,as well as output energy density E_density of up to 61m J/g.The stably output charge density Q_density can reach 24.4m C/m²,as well as output energy density E_density of up to 52m J/g.2.The energy output performance of the dielectric elastomer generator in AC mode is studied.The relationship between the capacitance change ratio of DEC,the capacitance in SPC and the transfer charge density,the power output energy density,and voltage boosting numbers of the generator are explored.The relationship between voltage of DEC,transfer charge density,and power output energy density are studied.The energy output performance of generator under environmental conditions of different frequencies and humidity are investigated.The relationship between internal resistance and output power are studied.3.The wave energy generator based on dielectric elastomer working in AC mode is designed and manufactured.Wireless remote self-powered system is constructed.In the experiment,the wave maker is used to simulate the wave.The wave energy generator based on dielectric elastomer is working in AC mode.The wireless temperature sensor is charged by output electric energy.The function of long-distance wireless transporting of temperature data is realized.The transmitting distance is demonstrated as far as1.7 km.Then wireless remote self-powered system is constructed.