Design Of Ocean-Wave Type Permanent Magnet Power Generation Device

Traditionally, the study of marine power development focuses on ocean wave power station and related high power generation equipment. However, the main concern of the thesis is research on unit-style power supply system. The research could help to provide electrical power to ocean meteorology monitoring equipments and the sensor network on them, which solves a series of problems such as longevity restriction of chemical battery and high maintenance costs. In the research, a kind of rare earth permanent magnet (REPM) material, neodymium iron boron (NdFeB) is used to make the vibrator. Besides, equipments for experiments are set up according to linear wave theory based on Faraday Law of Electromagnetic Induction.On the basis of ocean wave theory and Faraday Law of Electromagnetic Induction, permanent magnet generation equipment is analyzed and mechanical and electrical combination model is established. Relationship between input and output signal derived through the model coincides well with the practical situation and model supplies related simulation with sufficient reliable theories.Then static state magnetic field simulation analysis of wave generation equipment is performed by means of finite element analysis software to obtain structural parameters of permanent magnet vibrator model and optimize induction coil structure. Through transient analysis of magnetic field several factors influencing output inductive electromotive force are figured out. The factors are vibrating magnitude of permanent magnet vibrator, vibrating frequency, turns of the coil, space, magnetic path structure and so on.Furthermore, traditional energy collection circuit performance is studied. Simulation results indicate output voltage and power depends on load to a large degree. Improved energy collection circuit includes more parts such as super capacitor energy reservation module, voltage regulation module, switch controlling circuit and supplementary circuit. Through precise control of MOS switches, effective management of micro dissipation power supply is realized.At last, wave generation equipment for experiment is designed and made. And output inductive electromotive forces are measured. Measurements show the inductive electromotive force is 7.857 volts with vibration being ±50 millimeters, period being 2 seconds, and coil turn being 400. The experimental result is nearly the same with the simulation result with error being 0.231 volts only. This validates the correctness of derivation of inductive electromotive force and serves as the theoretical basis for design and manufacture of permanent magnet ocean wave generation equipment.