Design Of Sinusoidal Inverter Power Supply Independently Regulating Voltage And Frequency

With the development of science and technology, the requirement of customer to the power quantity will be more and more higher. The quantity of original electric power including the city electric net may can't satisfy the requirement of the customer, therefore it must be processed. In order to provide the power supply for a great deal of equipments which request different voltages and frequencies of the power supply, the sine-wave inverter technique improve the quantity of original electric power. According to effective requirement, a single-phase inverter power supply controlled by MCU is designed.In the paper, firstly, the basic structure and the control strategy of the inverter system have been introduced, and the bipolar SPWM control strategy and the unipolar SPWM control strategy have been compared. After compared, the unipolar SPWM control strategy is selected. Secondly, according to the technique request of the inverter power supply, the paper put forward the project of the hardware electric circuit and the control electric circuit that is exceptionally introduced, and the frame diagram of the main procedure and each sub-procedure in the software design. The inverter is controlled by C8051F040 that is made by Cygnal. The MCU have been exceptionally introduced.At last, according to the design, a single-phase inverter power supply is made after completed the software debug. The experiment is carried out, which obtains perfect result. After comparing advantages with disadvantages of the result of the experiment, the paper put forward the improvement project.The experiments prove that the project is reasonable. Compared with the traditional power supply, the digital power supply has many advantages, such as more accuracy, reliable, remote control, intelligence manage etc., and simplified the design of the hardware electric circuit.