Research On Portable Multi - Function Power Supply

At present, the power outage usually occurs in the power supply system. As a result, the application of the watt-hour meter will be extremely inconvenient because the site outage. When customers request repairs, often unable to clearly inform the use of electricity on the spot meter. Today, battery technology has been perfect, not only convenient and portable. The battery output DC inverter to the appropriate AC, this voltage is then put to the watt-hour meter. In this way, we can solve the above problems effectively.First, the article introduced the development status and technology status and development trend of inverter. Compare all types of topologies on the market in the form of a common power inverter and its advantages and disadvantages.Second, determine the portable multifunctional power supply in this article circuit topology used and analyzed control strategies. Combined with the issue of performance requirements, we adopt the application of high frequency data link upon the inverter power supply topology structure to reduce the volume and weight of the power supply and the SPWM control technology to control the waveform. DC inverter frequency inverter circuit pre-lithium batteries provide a high-frequency alternating current through the high-frequency step-up transformer isolation, full-bridge rectifier, inverter and filtering the final output level required AC voltage. By changing the modulation level inverter circuit driving waveforms than M, to achieve a different voltage levels of output. Finally, the single closed-loop PI adjustment is used to optimize the output voltage.Third, given in detail the principles of portable multi-function power of the hardware circuit design, component selection, and software programming. First, the main chip DSP28035 and minimum system was brief; then separately from the device selection and parameter power circuit and control circuit calculations start with a portable multifunction power hardware circuit to complete the overall design; and finally from the main structure to the child analyze multiple aspects of the program introduces the software design of the system.Finally, according to the design requirements for the completion of the hardware circuit welding, debugging and the experiment, the experimental concrete steps and associated experimental waveforms.This article studied portable multifunction power supply, you can output the 220 V, 100 V, 57.7V three voltage levels of single-phase AC power. Experiments show that the output waveform of the power supply is pretty good and the system is reliable in work.