The Research Of Induction Heating System For Aquaculture In Bohai Bay

With the intensive aquaculture in the eighties, factorial mariculture rapidly rises. The average temperature in winter in Bohai Gulf is below8℃, many see products grow slowly or stop growing, so heating device is needed to raise seawater temperature. Traditional mariculture use boiler(coal,oil and gas) device for heating. But because of the high energy consumption, low power, severe pollution, gigantic operation costs of the boiler, a new heating device needs to be found.Induction heating power is a heating device based on the theory of electromagnetic induction. It heats steel pipe. When working, induction heating device heats the pipe rapidly, and then the water running through the heated pipe absorbs the heat, thus water is heated. This induction heating power uses Samsung MCU S3F9454as the main control machine to realize the parameter acquisition and protective control of the system. Rectifier uses uncontrollable three-phase full bridge rectification circuit. Invertors use double-phase half bridge the series resonant circuit which combines resonant topology of high frequency and IGBT.PMW. The drive circuit of the inverter composed of controller SG3525and rapid optical coupler, rate tracking circuit make the whole system work in resonance. In order to make steady control of the temperature. The digital PID algorithm fits with the method of rate and power regulation to make the rated temperature constant. The testing result of principle prototype indicates it works steadily, save energy and protect environment with good heating effect, high power factor...