Study And Design Of New Ozone Power Based On Soft-switching Technology

Dielectric barrier discharge method is the most commonly used method of produceing ozone in industry. As the ozone generator electrical parameters defined, the powered frequency is the key to improve the efficiency of ozone generated by DBD method, to increase inverter power density in the industry and to reduce the volume and weight of output transformers and AC filter. With the increasing the frequency of the inverter, there are several issues, such as switching losses increased, electromagnetic interference, conductor of the skin effect and proximity effect, ESR capacitance and of parasitic parameters and other, including switching losses and electromagnetic interference. In order to solve these problems, soft-switch technology is widely used in ozone inverter.In this article, we discusse a new type of soft-switching topology, and uses it for ozone generator. This soft-switching structure increases a charge-discharge capacitor and two IGBTs between inverter and power, IGBT control the power turn-on and off, causing the capacitor charging and discharging, forming a soft-switching condition. This builts on soft switch topology of ozone generator inverter system, and obtains the inverter circuit diagram. In the time domain-wide, the working principles and modes of the power in half the work cycle is studied and analyzed in detail, the power's mathematical model of each mode is deduced.And the main electrical parameter formula and discharge power of expression are obtained. For the special circuit structure of soft switch, PSM control strategies, and provides power control scheme is used. Taking DSP-TMS320LF2812 digital processor core as the control center, the ozone power control system is designed. The PWM generation, DPLL frequency tracking and PSM real-time digital modulation capabilities are designed. Zero compareing circuit, IGBT driver circuit and protection system hardware circuit diagram are given, the main circuit parameters of the ozone generator is designed. By MATLAB simulation, results verify the theory of rationality and feasibility of soft-switching inverter topology that can be successfully applied to high-power DBD-type ozone generator power. All the IGBT achieve the soft turn-on and soft turn- off, and achieve high frequency technology. It reaches the objective to increase the yield of ozone.