The Research And Design On Digital 6kW Three-phase Emergency Power Supply

With the rapid development of society, the more modern and informational, the more relying on the electric power. It will cause great accident or economic losses in the event of power interruption. The Emergency Power Supply can offer the electric energy for equipment in various kinds of occasions while the power interruption. So it is very important to research the high-powered Emergency Power Supply.The paper has done all-around study on the key technology of EPS from theory to practice and established stability theoretical and practical foundation for continuing study work.Firstly, the paper roundly introduced the sorts of EPS contain their developping status and developping direction. Via comparing diesel motor, UPS and EPS, the paper drew out that it had great importance to research EPS.Secondly, the paper laboured its working principle and design requests, and made its design scheme. Based on the collective structure of EPS, the paper particularly introduced the design process of the main circuit.The paper analyzed the basic theory and mathematic model of three phase voltage PWM inverter and proposed one kind of control strategy based on the voltage-current double-loop. It used the exterior loop to control the voltage the EPS outputted, and used the inner loop to control the current. Simulation testified that the control method could improve the dynamic response character and interference rejection ability. Thirdly, the paper detailedly explained the whole system's hardware structure based on DSP, and made the flow chart of the software which realized the PWM occur, the current control loop and the voltage loop.Lastly, the paper introduced the experimentation, analyzed the problems and gave its resolve methods.